; Disassembly of the CPC6128 operating system ROM ;; START OF LOW KERNEL JUMPBLOCK AND ROM START ;---------------------------------------------------------------- ; RST 0 - LOW: RESET ENTRY 0000 01897f ld bc,$7f89 ; select mode 1, disable upper rom, enable lower rom 0003 ed49 out (c),c ; select mode and rom configuration 0005 c39105 jp $0591 ;---------------------------------------------------------------- 0008 c38ab9 jp $b98a ; RST 1 - LOW: LOW JUMP ;---------------------------------------------------------------- 000b c384b9 jp $b984 ; LOW: KL LOW PCHL ;---------------------------------------------------------------- 000e c5 push bc ; LOW: PCBC INSTRUCTION 000f c9 ret ;---------------------------------------------------------------- 0010 c31dba jp $ba1d ; RST 2 - LOW: SIDE CALL ;---------------------------------------------------------------- 0013 c317ba jp $ba17 ; LOW: KL SIDE PCHL ;---------------------------------------------------------------- 0016 d5 push de ; LOW: PCDE INSTRUCTION 0017 c9 ret ;---------------------------------------------------------------- 0018 c3c7b9 jp $b9c7 ; RST 3 - LOW: FAR CALL ;---------------------------------------------------------------- 001b c3b9b9 jp $b9b9 ; LOW: KL FAR PCHL ;---------------------------------------------------------------- 001e e9 jp (hl) ; LOW: PCHL INSTRUCTION ;---------------------------------------------------------------- 001f 00 nop ;---------------------------------------------------------------- 0020 c3c6ba jp $bac6 ; RST 4 - LOW: RAM LAM ;---------------------------------------------------------------- 0023 c3c1b9 jp $b9c1 ; LOW: KL FAR ICALL ;---------------------------------------------------------------- 0026 00 nop 0027 00 nop ;---------------------------------------------------------------- 0028 c335ba jp $ba35 ; RST 5 - LOW: FIRM JUMP 002b 00 nop 002c ed49 out (c),c 002e d9 exx 002f fb ei ;---------------------------------------------------------------- 0030 f3 di ; RST 6 - LOW: USER RESTART 0031 d9 exx 0032 212b00 ld hl,$002b 0035 71 ld (hl),c 0036 1808 jr $0040 ; (+$08) ;---------------------------------------------------------------- 0038 c341b9 jp $b941 ; RST 7 - LOW: INTERRUPT ENTRY ;---------------------------------------------------------------- 003b c9 ret ; LOW: EXT INTERRUPT ;---------------------------------------------------------------- 003c 00 nop 003d 00 nop 003e 00 nop 003f 00 nop ;; END OF LOW KERNEL JUMPBLOCK ;;---------------------------------------------------------------------------------------- 0040 cbd1 set 2,c 0042 18e8 jr $002c ; (-$18) ;;---------------------------------------------------------------------------------------- ;; Setup LOW KERNEL jumpblock ;; Copy RSTs to RAM 0044 214000 ld hl,$0040 ; copy first &40 bytes of this rom to &0000 ; in RAM, and therefore initialise low kernel jumpblock 0047 2d dec l 0048 7e ld a,(hl) ; get byte from rom 0049 77 ld (hl),a ; write byte to ram 004a 20fb jr nz,$0047 ; ;; initialise USER RESTART in LOW KERNEL jumpblcok 004c 3ec7 ld a,$c7 004e 323000 ld ($0030),a ;; Setup HIGH KERNEL jumpblock 0051 21a603 ld hl,$03a6 ; copy high kernel jumpblock 0054 1100b9 ld de,$b900 0057 01e401 ld bc,$01e4 005a edb0 ldir ;;========================================================================== ;; KL CHOKE OFF 005c f3 di 005d 3ad9b8 ld a,($b8d9) 0060 ed5bd7b8 ld de,($b8d7) 0064 06cd ld b,$cd 0066 212db8 ld hl,$b82d 0069 3600 ld (hl),$00 006b 23 inc hl 006c 10fb djnz $0069 ; (-$05) 006e 47 ld b,a 006f 0eff ld c,$ff 0071 a9 xor c 0072 c0 ret nz 0073 47 ld b,a 0074 5f ld e,a 0075 57 ld d,a 0076 c9 ret ;;========================================================================== ;; this is called at the very end just before BASIC is started ;; ;; HL = address to start ;; C = rom select ;; ;; if HL=0, then BASIC is started. 0077 7c ld a,h 0078 b5 or l 0079 79 ld a,c 007a 2004 jr nz,$0080 ; HL=0? ;; yes, HL = 0 007c 7d ld a,l ; A = 0 (BASIC) 007d 2106c0 ld hl,$c006 ; execution address for BASIC ;; A = rom select ;; HL = address to start 0080 32d6b8 ld ($b8d6),a ;; initialise three byte far address 0083 32d9b8 ld ($b8d9),a ; rom select byte 0086 22d7b8 ld ($b8d7),hl ; address 0089 21ffab ld hl,$abff 008c 114000 ld de,$0040 008f 01ffb0 ld bc,$b0ff 0092 3100c0 ld sp,$c000 0095 df rst $18 ; RST 3 - LOW: FAR CALL defw &b8d7 0098 c7 rst $00 ; RST 0 - LOW: RESET ENTRY ;;========================================================================== ;; KL TIME PLEASE 0099 f3 di 009a ed5bb6b8 ld de,($b8b6) 009e 2ab4b8 ld hl,($b8b4) 00a1 fb ei 00a2 c9 ret ;;========================================================================== ;; KL TIME SET 00a3 f3 di 00a4 af xor a 00a5 32b8b8 ld ($b8b8),a 00a8 ed53b6b8 ld ($b8b6),de 00ac 22b4b8 ld ($b8b4),hl 00af fb ei 00b0 c9 ret ;;========================================================================== 00b1 21b4b8 ld hl,$b8b4 00b4 34 inc (hl) 00b5 23 inc hl 00b6 28fc jr z,$00b4 ; (-$04) ;; test VSYNC state 00b8 06f5 ld b,$f5 00ba ed78 in a,(c) 00bc 1f rra 00bd 3008 jr nc,$00c7 ;; VSYNC is set 00bf 2ab9b8 ld hl,($b8b9) 00c2 7c ld a,h 00c3 b7 or a 00c4 c45301 call nz,$0153 00c7 2abbb8 ld hl,($b8bb) 00ca 7c ld a,h 00cb b7 or a 00cc c45301 call nz,$0153 00cf cdd720 call $20d7 00d2 21bfb8 ld hl,$b8bf 00d5 35 dec (hl) 00d6 c0 ret nz 00d7 3606 ld (hl),$06 00d9 cdf4bd call $bdf4 ; IND: KM SCAN KEYS 00dc 2abdb8 ld hl,($b8bd) 00df 7c ld a,h 00e0 b7 or a 00e1 c8 ret z 00e2 2131b8 ld hl,$b831 00e5 cbc6 set 0,(hl) 00e7 c9 ret 00e8 2b dec hl 00e9 3600 ld (hl),$00 00eb 2b dec hl 00ec 3a2eb8 ld a,($b82e) 00ef b7 or a 00f0 200c jr nz,$00fe ; (+$0c) 00f2 222db8 ld ($b82d),hl 00f5 222fb8 ld ($b82f),hl 00f8 2131b8 ld hl,$b831 00fb cbf6 set 6,(hl) 00fd c9 ret 00fe ed5b2fb8 ld de,($b82f) 0102 222fb8 ld ($b82f),hl 0105 eb ex de,hl 0106 73 ld (hl),e 0107 23 inc hl 0108 72 ld (hl),d 0109 c9 ret 010a ed7332b8 ld ($b832),sp 010e 31b4b8 ld sp,$b8b4 0111 e5 push hl 0112 d5 push de 0113 c5 push bc 0114 2131b8 ld hl,$b831 0117 cb76 bit 6,(hl) 0119 281e jr z,$0139 ; (+$1e) 011b cbfe set 7,(hl) 011d 2a2db8 ld hl,($b82d) 0120 7c ld a,h 0121 b7 or a 0122 280e jr z,$0132 ; (+$0e) 0124 5e ld e,(hl) 0125 23 inc hl 0126 56 ld d,(hl) 0127 ed532db8 ld ($b82d),de 012b 23 inc hl 012c cd0902 call $0209 012f f3 di 0130 18eb jr $011d ; (-$15) 0132 2131b8 ld hl,$b831 0135 cb46 bit 0,(hl) 0137 2810 jr z,$0149 ; (+$10) 0139 3600 ld (hl),$00 013b 37 scf 013c 08 ex af,af' 013d cd8901 call $0189 0140 b7 or a 0141 08 ex af,af' 0142 2131b8 ld hl,$b831 0145 7e ld a,(hl) 0146 b7 or a 0147 20d2 jr nz,$011b ; (-$2e) 0149 3600 ld (hl),$00 014b c1 pop bc 014c d1 pop de 014d e1 pop hl 014e ed7b32b8 ld sp,($b832) 0152 c9 ret 0153 5e ld e,(hl) 0154 23 inc hl 0155 7e ld a,(hl) 0156 23 inc hl 0157 b7 or a 0158 cae201 jp z,$01e2 ; KL EVENT 015b 57 ld d,a 015c d5 push de 015d cde201 call $01e2 ; KL EVENT 0160 e1 pop hl 0161 18f0 jr $0153 ; (-$10) ;;========================================================================== ;; KL NEW FRAME FLY 0163 e5 push hl 0164 23 inc hl 0165 23 inc hl 0166 cdd201 call $01d2 ; KL INIT EVENT 0169 e1 pop hl ;;========================================================================== ;; KL ADD FRAME FLY 016a 11b9b8 ld de,$b8b9 016d c37903 jp $0379 ;;========================================================================== ;; KL DEL FRAME FLY 0170 11b9b8 ld de,$b8b9 0173 c38803 jp $0388 ;;========================================================================== ;; KL NEW FAST TICKER 0176 e5 push hl 0177 23 inc hl 0178 23 inc hl 0179 cdd201 call $01d2 ; KL INIT EVENT 017c e1 pop hl ;;========================================================================== ;; KL ADD FAST TICKER 017d 11bbb8 ld de,$b8bb 0180 c37903 jp $0379 ;;========================================================================== ;; KL DEL FAST TICKER 0183 11bbb8 ld de,$b8bb 0186 c38803 jp $0388 ;;========================================================================== 0189 2abdb8 ld hl,($b8bd) 018c 7c ld a,h 018d b7 or a 018e c8 ret z 018f 5e ld e,(hl) 0190 23 inc hl 0191 56 ld d,(hl) 0192 23 inc hl 0193 4e ld c,(hl) 0194 23 inc hl 0195 46 ld b,(hl) 0196 78 ld a,b 0197 b1 or c 0198 2816 jr z,$01b0 ; (+$16) 019a 0b dec bc 019b 78 ld a,b 019c b1 or c 019d 200e jr nz,$01ad ; (+$0e) 019f d5 push de 01a0 23 inc hl 01a1 23 inc hl 01a2 e5 push hl 01a3 23 inc hl 01a4 cde201 call $01e2 ; KL EVENT 01a7 e1 pop hl 01a8 46 ld b,(hl) 01a9 2b dec hl 01aa 4e ld c,(hl) 01ab 2b dec hl 01ac d1 pop de 01ad 70 ld (hl),b 01ae 2b dec hl 01af 71 ld (hl),c 01b0 eb ex de,hl 01b1 18d9 jr $018c ; (-$27) ;;========================================================================== ;; KL ADD TICKER 01b3 e5 push hl 01b4 23 inc hl 01b5 23 inc hl 01b6 f3 di 01b7 73 ld (hl),e 01b8 23 inc hl 01b9 72 ld (hl),d 01ba 23 inc hl 01bb 71 ld (hl),c 01bc 23 inc hl 01bd 70 ld (hl),b 01be e1 pop hl 01bf 11bdb8 ld de,$b8bd 01c2 c37903 jp $0379 ;;========================================================================== ;; KL DEL TICKER 01c5 11bdb8 ld de,$b8bd 01c8 cd8803 call $0388 01cb d0 ret nc 01cc eb ex de,hl 01cd 23 inc hl 01ce 5e ld e,(hl) 01cf 23 inc hl 01d0 56 ld d,(hl) 01d1 c9 ret ;;========================================================================== ;; KL INIT EVENT 01d2 f3 di 01d3 23 inc hl 01d4 23 inc hl 01d5 3600 ld (hl),$00 01d7 23 inc hl 01d8 70 ld (hl),b 01d9 23 inc hl 01da 73 ld (hl),e 01db 23 inc hl 01dc 72 ld (hl),d 01dd 23 inc hl 01de 71 ld (hl),c 01df 23 inc hl 01e0 fb ei 01e1 c9 ret ;;========================================================================== ;; KL EVENT 01e2 23 inc hl 01e3 23 inc hl 01e4 f3 di 01e5 7e ld a,(hl) 01e6 34 inc (hl) 01e7 fa0102 jp m,$0201 01ea b7 or a 01eb 2015 jr nz,$0202 ; (+$15) 01ed 23 inc hl 01ee 7e ld a,(hl) 01ef 2b dec hl 01f0 b7 or a 01f1 f22e02 jp p,$022e 01f4 08 ex af,af' 01f5 3011 jr nc,$0208 ; (+$11) 01f7 08 ex af,af' 01f8 87 add a,a 01f9 f2e800 jp p,$00e8 01fc 35 dec (hl) 01fd 23 inc hl 01fe 23 inc hl 01ff 1821 jr $0222 ; (+$21) 0201 35 dec (hl) 0202 08 ex af,af' 0203 3801 jr c,$0206 ; (+$01) 0205 fb ei 0206 08 ex af,af' 0207 c9 ret 0208 08 ex af,af' 0209 fb ei 020a 7e ld a,(hl) 020b 3d dec a 020c f8 ret m 020d e5 push hl 020e cd1b02 call $021b 0211 e1 pop hl 0212 35 dec (hl) 0213 c8 ret z 0214 f20d02 jp p,$020d 0217 34 inc (hl) 0218 c9 ret ;;========================================================================== ;; KL DO SYNC 0219 23 inc hl 021a 23 inc hl 021b 23 inc hl 021c 7e ld a,(hl) 021d 23 inc hl 021e 1f rra 021f d2c1b9 jp nc,$b9c1 0222 5e ld e,(hl) 0223 23 inc hl 0224 56 ld d,(hl) 0225 eb ex de,hl 0226 e9 jp (hl) ;;========================================================================== ;; KL SYNC RESET 0227 210000 ld hl,$0000 022a 22c1b8 ld ($b8c1),hl 022d c9 ret 022e e5 push hl 022f 47 ld b,a 0230 11c3b8 ld de,$b8c3 0233 eb ex de,hl 0234 2b dec hl 0235 2b dec hl 0236 56 ld d,(hl) 0237 2b dec hl 0238 5e ld e,(hl) 0239 7a ld a,d 023a b7 or a 023b 2807 jr z,$0244 ; (+$07) 023d 13 inc de 023e 13 inc de 023f 13 inc de 0240 1a ld a,(de) 0241 b8 cp b 0242 30ef jr nc,$0233 ; (-$11) 0244 d1 pop de 0245 1b dec de 0246 23 inc hl 0247 7e ld a,(hl) 0248 12 ld (de),a 0249 1b dec de 024a 72 ld (hl),d 024b 2b dec hl 024c 7e ld a,(hl) 024d 12 ld (de),a 024e 73 ld (hl),e 024f 08 ex af,af' 0250 3801 jr c,$0253 ; (+$01) 0252 fb ei 0253 08 ex af,af' 0254 c9 ret ;;========================================================================== ;; KL NEXT SYNC 0255 f3 di 0256 2ac0b8 ld hl,($b8c0) 0259 7c ld a,h 025a b7 or a 025b 2817 jr z,$0274 ; (+$17) 025d e5 push hl 025e 5e ld e,(hl) 025f 23 inc hl 0260 56 ld d,(hl) 0261 23 inc hl 0262 23 inc hl 0263 3ac2b8 ld a,($b8c2) 0266 be cp (hl) 0267 300a jr nc,$0273 ; (+$0a) 0269 f5 push af 026a 7e ld a,(hl) 026b 32c2b8 ld ($b8c2),a 026e ed53c0b8 ld ($b8c0),de 0272 f1 pop af 0273 e1 pop hl 0274 fb ei 0275 c9 ret ;;========================================================================== ;; KL DONE SYNC 0276 32c2b8 ld ($b8c2),a 0279 23 inc hl 027a 23 inc hl 027b 35 dec (hl) 027c c8 ret z 027d f3 di 027e f22e02 jp p,$022e 0281 34 inc (hl) 0282 fb ei 0283 c9 ret ;;========================================================================== ;; KL DEL SYNCHRONOUS 0284 cd8d02 call $028d ; KL DISARM EVENT 0287 11c0b8 ld de,$b8c0 028a c38803 jp $0388 ;;========================================================================== ;; KL DISARM EVENT 028d 23 inc hl 028e 23 inc hl 028f 36c0 ld (hl),$c0 0291 2b dec hl 0292 2b dec hl 0293 c9 ret ;;========================================================================== ;; KL EVENT DISABLE 0294 21c2b8 ld hl,$b8c2 0297 cbee set 5,(hl) 0299 c9 ret ;;========================================================================== ;; KL EVENT ENABLE 029a 21c2b8 ld hl,$b8c2 029d cbae res 5,(hl) 029f c9 ret ;;========================================================================== ;; KL LOG EXT 02a0 e5 push hl 02a1 ed5bd3b8 ld de,($b8d3) 02a5 22d3b8 ld ($b8d3),hl 02a8 73 ld (hl),e 02a9 23 inc hl 02aa 72 ld (hl),d 02ab 23 inc hl 02ac 71 ld (hl),c 02ad 23 inc hl 02ae 70 ld (hl),b 02af e1 pop hl 02b0 c9 ret ;;========================================================================== ;; KL FIND COMMAND 02b1 11c3b8 ld de,$b8c3 02b4 011000 ld bc,$0010 02b7 cda1ba call $baa1 ;; HI: KL LDIR 02ba eb ex de,hl 02bb 2b dec hl 02bc cbfe set 7,(hl) 02be 2ad3b8 ld hl,($b8d3) 02c1 7d ld a,l 02c2 1810 jr $02d4 ; (+$10) 02c4 e5 push hl 02c5 23 inc hl 02c6 23 inc hl 02c7 4e ld c,(hl) 02c8 23 inc hl 02c9 46 ld b,(hl) 02ca cdf102 call $02f1 02cd d1 pop de 02ce d8 ret c 02cf eb ex de,hl 02d0 7e ld a,(hl) 02d1 23 inc hl 02d2 66 ld h,(hl) 02d3 6f ld l,a 02d4 b4 or h 02d5 20ed jr nz,$02c4 ; (-$13) 02d7 0eff ld c,$ff 02d9 0c inc c 02da cd7eba call $ba7e ;; HI: KL PROBE ROM 02dd f5 push af 02de e603 and $03 02e0 47 ld b,a 02e1 ccf102 call z,$02f1 02e4 dc1c06 call c,$061c ; MC START PROGRAM 02e7 f1 pop af 02e8 87 add a,a 02e9 30ee jr nc,$02d9 ; (-$12) 02eb 79 ld a,c 02ec fe10 cp $10 02ee 38e9 jr c,$02d9 ; (-$17) 02f0 c9 ret 02f1 2104c0 ld hl,$c004 02f4 78 ld a,b 02f5 b7 or a 02f6 2804 jr z,$02fc ; (+$04) 02f8 60 ld h,b 02f9 69 ld l,c 02fa 0eff ld c,$ff 02fc cd79ba call $ba79 ;; HI: KL ROM SELECT 02ff c5 push bc 0300 5e ld e,(hl) 0301 23 inc hl 0302 56 ld d,(hl) 0303 23 inc hl 0304 eb ex de,hl 0305 1817 jr $031e ; (+$17) 0307 01c3b8 ld bc,$b8c3 030a 0a ld a,(bc) 030b be cp (hl) 030c 2008 jr nz,$0316 ; (+$08) 030e 23 inc hl 030f 03 inc bc 0310 87 add a,a 0311 30f7 jr nc,$030a ; (-$09) 0313 eb ex de,hl 0314 180c jr $0322 ; (+$0c) 0316 7e ld a,(hl) 0317 23 inc hl 0318 87 add a,a 0319 30fb jr nc,$0316 ; (-$05) 031b 13 inc de 031c 13 inc de 031d 13 inc de 031e 7e ld a,(hl) 031f b7 or a 0320 20e5 jr nz,$0307 ; (-$1b) 0322 c1 pop bc 0323 c387ba jp $ba87 ;; HI: KL ROM DESELECT ;;========================================================================== ;; KL ROM WALK 0326 0e0f ld c,$0f 0328 cd3003 call $0330 ; KL INIT BACK 032b 0d dec c 032c f22803 jp p,$0328 032f c9 ret ;;========================================================================== ;; KL INIT BACK 0330 3ad9b8 ld a,($b8d9) 0333 b9 cp c 0334 c8 ret z 0335 79 ld a,c 0336 fe10 cp $10 0338 d0 ret nc 0339 cd79ba call $ba79 ;; HI: KL ROM SELECT 033c 3a00c0 ld a,($c000) 033f e603 and $03 0341 3d dec a 0342 2022 jr nz,$0366 ; (+$22) 0344 c5 push bc 0345 37 scf 0346 cd06c0 call $c006 0349 301a jr nc,$0365 ; (+$1a) 034b d5 push de 034c 23 inc hl 034d eb ex de,hl 034e 21dab8 ld hl,$b8da 0351 ed4bd6b8 ld bc,($b8d6) 0355 0600 ld b,$00 0357 09 add hl,bc 0358 09 add hl,bc 0359 73 ld (hl),e 035a 23 inc hl 035b 72 ld (hl),d 035c 21fcff ld hl,$fffc 035f 19 add hl,de 0360 cda002 call $02a0 ; KL LOG EXT 0363 2b dec hl 0364 d1 pop de 0365 c1 pop bc 0366 c387ba jp $ba87 ;; HI: KL ROM DESELECT 0369 7e ld a,(hl) 036a bb cp e 036b 23 inc hl 036c 7e ld a,(hl) 036d 2b dec hl 036e 2003 jr nz,$0373 ; (+$03) 0370 ba cp d 0371 37 scf 0372 c8 ret z 0373 b7 or a 0374 c8 ret z 0375 6e ld l,(hl) 0376 67 ld h,a 0377 18f0 jr $0369 ; (-$10) 0379 eb ex de,hl 037a f3 di 037b cd6903 call $0369 037e 3806 jr c,$0386 ; (+$06) 0380 73 ld (hl),e 0381 23 inc hl 0382 72 ld (hl),d 0383 13 inc de 0384 af xor a 0385 12 ld (de),a 0386 fb ei 0387 c9 ret ;;==================================================================== 0388 eb ex de,hl 0389 f3 di 038a cd6903 call $0369 038d 3006 jr nc,$0395 ; (+$06) 038f 1a ld a,(de) 0390 77 ld (hl),a 0391 13 inc de 0392 23 inc hl 0393 1a ld a,(de) 0394 77 ld (hl),a 0395 fb ei 0396 c9 ret ;;==================================================================== ;; KL BANK SWITCH ;; ;; A = new configuration (0-31) 0397 f3 di 0398 d9 exx 0399 21d5b8 ld hl,$b8d5 039c 56 ld d,(hl) 039d 77 ld (hl),a 039e f6c0 or $c0 03a0 ed79 out (c),a 03a2 7a ld a,d 03a3 d9 exx 03a4 fb ei 03a5 c9 ret ;;-------------------------------------------------------------------- ;; HIGH KERNEL JUMPBLOCK 03a6 c35fba jp $ba5f ;; HI: KL U ROM ENABLE 03a9 c366ba jp $ba66 ;; HI: KL U ROM DISABLE 03ac c351ba jp $ba51 ;; HI: KL L ROM ENABLE 03af c358ba jp $ba58 ;; HI: KL L ROM DISABLE 03b2 c370ba jp $ba70 ;; HI: KL L ROM RESTORE 03b5 c379ba jp $ba79 ;; HI: KL ROM SELECT 03b8 c39dba jp $ba9d ;; HI: KL CURR SELECTION 03bb c37eba jp $ba7e ;; HI: KL PROBE ROM 03be c387ba jp $ba87 ;; HI: KL ROM DESELECT 03c1 c3a1ba jp $baa1 ;; HI: KL LDIR 03c4 c3a7ba jp $baa7 ;; HI: KL LDDR 03c7 3ac1b8 ld a,($b8c1) ;; HI: KL POLL SYNCRONOUS 03ca b7 or a 03cb c8 ret z 03cc e5 push hl 03cd f3 di 03ce 1806 jr $03d6 ; (+$06) 03d0 21bfb8 ld hl,$b8bf ;; HI: KL SCAN NEEDED 03d3 3601 ld (hl),$01 03d5 c9 ret 03d6 2ac0b8 ld hl,($b8c0) 03d9 7c ld a,h 03da b7 or a 03db 2807 jr z,$03e4 ; (+$07) 03dd 23 inc hl 03de 23 inc hl 03df 23 inc hl 03e0 3ac2b8 ld a,($b8c2) 03e3 be cp (hl) 03e4 e1 pop hl 03e5 fb ei 03e6 c9 ret ;;============================================================================================ ; RST 7 - LOW: INTERRUPT ENTRY handler 03e7 f3 di 03e8 08 ex af,af' 03e9 3833 jr c,$041e ; (+$33) 03eb d9 exx 03ec 79 ld a,c 03ed 37 scf 03ee fb ei 03ef 08 ex af,af' 03f0 f3 di 03f1 f5 push af 03f2 cb91 res 2,c 03f4 ed49 out (c),c 03f6 cdb100 call $00b1 03f9 b7 or a 03fa 08 ex af,af' 03fb 4f ld c,a 03fc 067f ld b,$7f 03fe 3a31b8 ld a,($b831) 0401 b7 or a 0402 2814 jr z,$0418 ; (+$14) 0404 fa72b9 jp m,$b972 0407 79 ld a,c 0408 e60c and $0c 040a f5 push af 040b cb91 res 2,c 040d d9 exx 040e cd0a01 call $010a 0411 d9 exx 0412 e1 pop hl 0413 79 ld a,c 0414 e6f3 and $f3 0416 b4 or h 0417 4f ld c,a 0418 ed49 out (c),c 041a d9 exx 041b f1 pop af 041c fb ei 041d c9 ret 041e 08 ex af,af' 041f e1 pop hl 0420 f5 push af 0421 cbd1 set 2,c 0423 ed49 out (c),c 0425 cd3b00 call $003b ; LOW: EXT INTERRUPT 0428 18cf jr $03f9 ; (-$31) ;;============================================================================================ ; LOW: KL LOW PCHL 042a f3 di 042b e5 push hl 042c d9 exx 042d d1 pop de 042e 1806 jr $0436 ; (+$06) ;;============================================================================================ ; RST 1 - LOW: LOW JUMP 0430 f3 di 0431 d9 exx 0432 e1 pop hl 0433 5e ld e,(hl) 0434 23 inc hl 0435 56 ld d,(hl) 0436 08 ex af,af' 0437 7a ld a,d 0438 cbba res 7,d 043a cbb2 res 6,d 043c 07 rlca 043d 07 rlca 043e 07 rlca 043f 07 rlca 0440 a9 xor c 0441 e60c and $0c 0443 a9 xor c 0444 c5 push bc 0445 cdb0b9 call $b9b0 0448 f3 di 0449 d9 exx 044a 08 ex af,af' 044b 79 ld a,c 044c c1 pop bc 044d e603 and $03 044f cb89 res 1,c 0451 cb81 res 0,c 0453 b1 or c 0454 1801 jr $0457 ; (+$01) 0456 d5 push de 0457 4f ld c,a 0458 ed49 out (c),c 045a b7 or a 045b 08 ex af,af' 045c d9 exx 045d fb ei 045e c9 ret ;;============================================================================================ ; LOW: KL FAR PCHL 045f f3 di 0460 08 ex af,af' 0461 79 ld a,c 0462 e5 push hl 0463 d9 exx 0464 d1 pop de 0465 1815 jr $047c ; (+$15) ;;============================================================================================ ; LOW: KL FAR ICALL 0467 f3 di 0468 e5 push hl 0469 d9 exx 046a e1 pop hl 046b 1809 jr $0476 ; (+$09) ;;============================================================================================ ; RST 3 - LOW: FAR CALL 046d f3 di 046e d9 exx 046f e1 pop hl 0470 5e ld e,(hl) 0471 23 inc hl 0472 56 ld d,(hl) 0473 23 inc hl 0474 e5 push hl 0475 eb ex de,hl 0476 5e ld e,(hl) 0477 23 inc hl 0478 56 ld d,(hl) 0479 23 inc hl 047a 08 ex af,af' 047b 7e ld a,(hl) 047c fefc cp $fc 047e 30be jr nc,$043e ; (-$42) 0480 06df ld b,$df 0482 ed79 out (c),a 0484 21d6b8 ld hl,$b8d6 0487 46 ld b,(hl) 0488 77 ld (hl),a 0489 c5 push bc 048a fde5 push iy 048c fe10 cp $10 048e 300f jr nc,$049f ; (+$0f) 0490 87 add a,a 0491 c6da add a,$da 0493 6f ld l,a 0494 ceb8 adc a,$b8 0496 95 sub l 0497 67 ld h,a 0498 7e ld a,(hl) 0499 23 inc hl 049a 66 ld h,(hl) 049b 6f ld l,a 049c e5 push hl 049d fde1 pop iy 049f 067f ld b,$7f 04a1 79 ld a,c 04a2 cbd7 set 2,a 04a4 cb9f res 3,a 04a6 cdb0b9 call $b9b0 04a9 fde1 pop iy 04ab f3 di 04ac d9 exx 04ad 08 ex af,af' 04ae 59 ld e,c 04af c1 pop bc 04b0 78 ld a,b 04b1 06df ld b,$df 04b3 ed79 out (c),a 04b5 32d6b8 ld ($b8d6),a 04b8 067f ld b,$7f 04ba 7b ld a,e 04bb 1890 jr $044d ; (-$70) ;;============================================================================================ ; LOW: KL SIDE PCHL 04bd f3 di 04be e5 push hl 04bf d9 exx 04c0 d1 pop de 04c1 1808 jr $04cb ; (+$08) ;;============================================================================================ ;; RST 2 - LOW: SIDE CALL 04c3 f3 di 04c4 d9 exx 04c5 e1 pop hl 04c6 5e ld e,(hl) 04c7 23 inc hl 04c8 56 ld d,(hl) 04c9 23 inc hl 04ca e5 push hl 04cb 08 ex af,af' 04cc 7a ld a,d 04cd cbfa set 7,d 04cf cbf2 set 6,d 04d1 e6c0 and $c0 04d3 07 rlca 04d4 07 rlca 04d5 21d9b8 ld hl,$b8d9 04d8 86 add a,(hl) 04d9 18a5 jr $0480 ; (-$5b) ;;============================================================================================ ; RST 5 - LOW: FIRM JUMP 04db f3 di 04dc d9 exx 04dd e1 pop hl 04de 5e ld e,(hl) 04df 23 inc hl 04e0 56 ld d,(hl) 04e1 cb91 res 2,c 04e3 ed49 out (c),c 04e5 ed5346ba ld ($ba46),de 04e9 d9 exx 04ea fb ei 04eb cd45ba call $ba45 04ee f3 di 04ef d9 exx 04f0 cbd1 set 2,c 04f2 ed49 out (c),c 04f4 d9 exx 04f5 fb ei 04f6 c9 ret ;;============================================================================================ ;; HI: KL L ROM ENABLE 04f7 f3 di 04f8 d9 exx 04f9 79 ld a,c 04fa cb91 res 2,c ; enable lower rom 04fc 1813 jr $0511 ;;============================================================================================ ;; HI: KL L ROM DISABLE 04fe f3 di 04ff d9 exx 0500 79 ld a,c 0501 cbd1 set 2,c ; disable upper rom 0503 180c jr $0511 ; (+$0c) ;;============================================================================================ ;; HI: KL U ROM ENABLE 0505 f3 di 0506 d9 exx 0507 79 ld a,c 0508 cb99 res 3,c 050a 1805 jr $0511 ; (+$05) ;;============================================================================================ ;; HI: KL U ROM DISABLE 050c f3 di 050d d9 exx 050e 79 ld a,c 050f cbd9 set 3,c ; disable upper rom 0511 ed49 out (c),c 0513 d9 exx 0514 fb ei 0515 c9 ret ;;============================================================================================ ;; HI: KL L ROM RESTORE 0516 f3 di 0517 d9 exx 0518 a9 xor c 0519 e60c and $0c 051b a9 xor c 051c 4f ld c,a 051d 18f2 jr $0511 ; (-$0e) ;;============================================================================================ ;; HI: KL ROM SELECT 051f cd5fba call $ba5f ;; HI: KL U ROM ENABLE 0522 180f jr $0533 ;;============================================================================================ ;; HI: KL PROBE ROM 0524 cd79ba call $ba79 ;; HI: KL ROM SELECT 0527 3a00c0 ld a,($c000) 052a 2a01c0 ld hl,($c001) ;;============================================================================================ ;; HI: KL ROM DESELECT 052d f5 push af 052e 78 ld a,b 052f cd70ba call $ba70 ;; HI: KL L ROM RESTORE 0532 f1 pop af 0533 e5 push hl 0534 f3 di 0535 06df ld b,$df 0537 ed49 out (c),c 0539 21d6b8 ld hl,$b8d6 053c 46 ld b,(hl) 053d 71 ld (hl),c 053e 48 ld c,b 053f 47 ld b,a 0540 fb ei 0541 e1 pop hl 0542 c9 ret ;;============================================================================================ ;; HI: KL CURR SELECTION 0543 3ad6b8 ld a,($b8d6) 0546 c9 ret ;;============================================================================================ ;; HI: KL LDIR 0547 cdadba call $baad 054a edb0 ldir 054c c9 ret ;;============================================================================================ ;; HI: KL LDDR 054d cdadba call $baad 0550 edb8 lddr 0552 c9 ret ;;============================================================================================ ;; used by HI: KL LDIR and HI: KL LDDR 0553 f3 di 0554 d9 exx 0555 e1 pop hl 0556 c5 push bc 0557 cbd1 set 2,c ; disable lower rom 0559 cbd9 set 3,c ; disable upper rom 055b ed49 out (c),c 055d cdc2ba call $bac2 0560 f3 di 0561 d9 exx 0562 c1 pop bc 0563 ed49 out (c),c 0565 d9 exx 0566 fb ei 0567 c9 ret ;;============================================================================================ 0568 e5 push hl 0569 d9 exx 056a fb ei 056b c9 ret ;;============================================================================================ ; RST 4 - LOW: RAM LAM 056c f3 di 056d d9 exx 056e 59 ld e,c ;; E = current rom configuration 056f cbd3 set 2,e ;; disable lower rom 0571 cbdb set 3,e ;; disable upper rom 0573 ed59 out (c),e ;; set rom configuration 0575 d9 exx 0576 7e ld a,(hl) ;; read byte from RAM 0577 d9 exx 0578 ed49 out (c),c ;; restore rom configuration 057a d9 exx 057b fb ei 057c c9 ret ;;============================================================================================ ;; read byte from address pointed to IX with roms disabled ;; ;; (used by cassette functions to read/write to RAM) ;; ;; IX = address of byte to read ;; C' = current rom selection and mode 057d d9 exx ;; switch to alternative register set 057e 79 ld a,c ;; get rom configuration 057f f60c or $0c ;; %00001100 (disable upper and lower rom) 0581 ed79 out (c),a ;; set the new rom configuration 0583 dd7e00 ld a,(ix+$00) ;; read byte from RAM 0586 ed49 out (c),c ;; restore original rom configuration 0588 d9 exx ;; switch back from alternative register set 0589 c9 ret ;;============================================================================================ 058a 26c7 ld h,$c7 058c c7 rst $00 058d c7 rst $00 058e c7 rst $00 058f c7 rst $00 0590 c7 rst $00 ;;============================================================================================ 0591 f3 di 0592 0182f7 ld bc,$f782 0595 ed49 out (c),c 0597 0100f4 ld bc,$f400 ;; initialise PPI port A data 059a ed49 out (c),c 059c 0100f6 ld bc,$f600 ;; initialise PPI port C data ;; - select keyboard line 0 ;; - PSG control inactive ;; - cassette motor off ;; - cassette write data "0" 059f ed49 out (c),c ;; set PPI port C data 05a1 017fef ld bc,$ef7f 05a4 ed49 out (c),c 05a6 06f5 ld b,$f5 ;; PPI port B inputs 05a8 ed78 in a,(c) 05aa e610 and $10 05ac 21d505 ld hl,$05d5 ;; end of CRTC data for 50Hz display 05af 2003 jr nz,$05b4 05b1 21e505 ld hl,$05e5 ;; end of CRTC data for 60Hz display ;; initialise display ;; starting with register 15, then down to 0 05b4 010fbc ld bc,$bc0f 05b7 ed49 out (c),c ; select CRTC register 05b9 2b dec hl 05ba 7e ld a,(hl) ; get data from table 05bb 04 inc b 05bc ed79 out (c),a ; write data to selected CRTC register 05be 05 dec b 05bf 0d dec c 05c0 f2b705 jp p,$05b7 ;; continue with setup... 05c3 1820 jr $05e5 ; (+$20) ;; CRTC data for 50Hz display 05c5 defb &3f, &28, &2e, &8e, &26, &00, &19, &1e, &00, &07, &00,&00,&30,&00,&c0,&00 ;; CRTC data for 60Hz display 05d5 defb &3f, &28, &2e, &8e, &1f, &06, &19, &1b, &00, &07, &00,&00,&30,&00,&c0,&00 ;;======================================================== ;; continue with setup... 05e5 117706 ld de,$0677 ; this is executed by execution address 05e8 210000 ld hl,$0000 ; this will force MC START PROGRAM to start BASIC 05eb 1832 jr $061f ; mc start program ;;======================================================== ;; MC BOOT PROGRAM ;; ;; HL = execute address 05ed 3100c0 ld sp,$c000 05f0 e5 push hl 05f1 cde91f call $1fe9 ;; SOUND RESET 05f4 f3 di 05f5 01fff8 ld bc,$f8ff ;; reset all peripherals 05f8 ed49 out (c),c 05fa cd5c00 call $005c ;; KL CHOKE OFF 05fd e1 pop hl 05fe d5 push de 05ff c5 push bc 0600 e5 push hl 0601 cd981b call $1b98 ;; KM RESET 0604 cd8410 call $1084 ;; TXT RESET 0607 cdd00a call $0ad0 ;; SCR RESET 060a cd5fba call $ba5f ;; HI: KL U ROM ENABLE 060d e1 pop hl 060e cd1e00 call $001e ;; LOW: PCHL INSTRUCTION 0611 c1 pop bc 0612 d1 pop de 0613 3807 jr c,$061c ; MC START PROGRAM ;; display program load failed message 0615 eb ex de,hl 0616 48 ld c,b 0617 11f906 ld de,$06f9 ; program load failed 061a 1803 jr $061f ; ;;========================================================= ;; MC START PROGRAM ;; HL = entry address ;; C = rom select 061c 113707 ld de,$0737 ; RET (no message) ; this is executed by: LOW: PCHL INSTRUCTION ;;--------------------------------------------------------- 061f f3 di ; disable interrupts 0620 ed56 im 1 ; Z80 interrupt mode 1 0622 d9 exx 0623 0100df ld bc,$df00 ; select upper ROM 0 0626 ed49 out (c),c 0628 01fff8 ld bc,$f8ff ; reset all peripherals 062b ed49 out (c),c 062d 01c07f ld bc,$7fc0 ; select ram configuration 0 0630 ed49 out (c),c 0632 017efa ld bc,$fa7e ; stop disc motor 0635 af xor a 0636 ed79 out (c),a 0638 2100b1 ld hl,$b100 ; clear memory block which will hold 063b 1101b1 ld de,$b101 ; firmware jumpblock 063e 01f907 ld bc,$07f9 0641 77 ld (hl),a 0642 edb0 ldir 0644 01897f ld bc,$7f89 ; select mode 1, lower rom on, upper rom off 0647 ed49 out (c),c 0649 d9 exx 064a af xor a 064b 08 ex af,af' 064c 3100c0 ld sp,$c000 064f e5 push hl 0650 c5 push bc 0651 d5 push de 0652 cd4400 call $0044 ;; initialise LOW KERNEL and HIGH KERNEL jumpblocks 0655 cdbd08 call $08bd ;; JUMP RESTORE 0658 cd5c1b call $1b5c ;; KM INITIALISE 065b cde91f call $1fe9 ;; SOUND RESET 065e cdbf0a call $0abf ;; SCR INITIALISE 0661 cd7410 call $1074 ;; TXT INITIALISE 0664 cda815 call $15a8 ;; GRA INITIALISE 0667 cdbc24 call $24bc ;; CAS INITIALISE 066a cde007 call $07e0 ;; MC RESET PRINTER 066d fb ei 066e e1 pop hl 066f cd1e00 call $001e ;; LOW: PCHL INSTRUCTION 0672 c1 pop bc 0673 e1 pop hl 0674 c37700 jp $0077 ;; start BASIC or program ;;====================================================================== 0677 210202 ld hl,$0202 067a cd7011 call $1170 ; TXT SET CURSOR 067d cd2307 call $0723 ; get pointer to machine name (based on LK1-LK3 on PCB) 0680 cdfc06 call $06fc ; display message 0683 218806 ld hl,$0688 ; "128K Microcomputer.." message 0686 1874 jr $06fc ; 0688 defb " 128K Microcomputer (v3)" defb &1f,&02,&04 defb "Copyright" defb &1f,&02,&04 defb &a4 ;; copyright symbol defb "1985 Amstrad Consumer Electronics plc" defb &1f,&0c,&05 defb "and Locomotive Software Ltd." defb &1f,&01,&07 defb 0 ;;----------------------------------------------------------------------- 06f9 210507 ld hl,$0705 ; "*** PROGRAM LOAD FAILED ***" message ;;----------------------------------------------------------------------- ;; display a null terminated string 06fc 7e ld a,(hl) ; get message character 06fd 23 inc hl 06fe b7 or a 06ff c8 ret z 0700 cdfe13 call $13fe ; TXT OUTPUT 0703 18f7 jr $06fc 0705 defb "*** PROGRAM LOAD FAILED ***",13,10,0 ;;----------------------------------------------------------------------- ;; get a pointer to the machine name ;; HL = machine name 0723 06f5 ld b,$f5 ;; PPI port B input 0725 ed78 in a,(c) 0727 2f cpl 0728 e60e and $0e ;; isolate LK1-LK3 (defines machine name on startup) 072a 0f rrca ;; A = machine name number 072b 213807 ld hl,$0738 ; table of names 072e 3c inc a 072f 47 ld b,a ;; B = index of string wanted ;; keep getting bytes until end of string marker (0) is found ;; decrement string count and continue until we have got string ;; wanted 0730 7e ld a,(hl) ; get byte 0731 23 inc hl 0732 b7 or a ; end of string? 0733 20fb jr nz,$0730 ; 0735 10f9 djnz $0730 ; (-$07) 0737 c9 ret ;; start-up names 0738 defb "Arnold",0 ;; this name can't be chosen defb "Amstrad",0 defb "Orion",0 defb "Schneider",0 defb "Awa",0 defb "Solavox",0 defb "Saisho",0 defb "Triumph",0 defb "Isp",0 ;;==================================================================== ;; MC SET MODE ;; ;; A = mode index ;; ;; C' = Gate Array rom and mode configuration register ;; test mode index is in range 0776 fe03 cp $03 0778 d0 ret nc ;; mode index is in range: A = 0,1 or 2. 0779 f3 di 077a d9 exx 077b cb89 res 1,c ;; clear mode bits (bit 1 and bit 0) 077d cb81 res 0,c 077f b1 or c ;; set mode bits to new mode value 0780 4f ld c,a 0781 ed49 out (c),c ;; set mode 0783 fb ei 0784 d9 exx 0785 c9 ret ;;==================================================================== ;; MC CLEAR INKS 0786 e5 push hl 0787 210000 ld hl,$0000 078a 1804 jr $0790 ; (+$04) ;;==================================================================== ;; MC SET INKS 078c e5 push hl 078d 210100 ld hl,$0001 0790 d5 push de 0791 c5 push bc 0792 eb ex de,hl 0793 01107f ld bc,$7f10 ; set border colour 0796 cdaa07 call $07aa 0799 23 inc hl 079a 0e00 ld c,$00 079c cdaa07 call $07aa 079f 19 add hl,de 07a0 0c inc c 07a1 79 ld a,c 07a2 fe10 cp $10 07a4 20f6 jr nz,$079c ; (-$0a) 07a6 c1 pop bc 07a7 d1 pop de 07a8 e1 pop hl 07a9 c9 ret ;;==================================================================== ;; set colour for a pen ;; ;; HL = address of colour for pen ;; C = pen index 07aa ed49 out (c),c ; select pen 07ac 7e ld a,(hl) 07ad e61f and $1f 07af f640 or $40 07b1 ed79 out (c),a ; set colour for pen 07b3 c9 ret ;;==================================================================== ;; MC WAIT FLYBACK 07b4 f5 push af 07b5 c5 push bc 07b6 06f5 ld b,$f5 ; PPI port B I/O address 07b8 ed78 in a,(c) ; read PPI port B input 07ba 1f rra ; transfer bit 0 (VSYNC signal from CRTC) into carry flag 07bb 30fb jr nc,$07b8 ; wait until VSYNC=1 07bd c1 pop bc 07be f1 pop af 07bf c9 ret ;;==================================================================== ;; MC SCREEN OFFSET ;; ;; HL = offset ;; A = base 07c0 c5 push bc 07c1 0f rrca 07c2 0f rrca 07c3 e630 and $30 07c5 4f ld c,a 07c6 7c ld a,h 07c7 1f rra 07c8 e603 and $03 07ca b1 or c ;; CRTC register 12 and 13 define screen base and offset 07cb 010cbc ld bc,$bc0c 07ce ed49 out (c),c ; select CRTC register 12 07d0 04 inc b ; BC = bd0c 07d1 ed79 out (c),a ; set CRTC register 12 data 07d3 05 dec b ; BC = bc0c 07d4 0c inc c ; BC = bc0d 07d5 ed49 out (c),c ; select CRTC register 13 07d7 04 inc b ; BC = bd0d 07d8 7c ld a,h 07d9 1f rra 07da 7d ld a,l 07db 1f rra 07dc ed79 out (c),a ; set CRTC register 13 data 07de c1 pop bc 07df c9 ret ;;==================================================================== ;; MC RESET PRINTER 07e0 21f707 ld hl,$07f7 07e3 1104b8 ld de,$b804 07e6 011500 ld bc,$0015 07e9 edb0 ldir 07eb 21f107 ld hl,$07f1 ;; table used to initialise printer indirections 07ee c3b40a jp $0ab4 ;; initialise printer indirections 07f1 defb &03 defw &bdf1 jp $0835 ;; IND: MC WAIT PRINTER 07f7 0a ld a,(bc) 07f8 a0 and b 07f9 5e ld e,(hl) 07fa a1 and c 07fb 5c ld e,h 07fc a2 and d 07fd 7b ld a,e 07fe a3 and e 07ff 23 inc hl 0800 a6 and (hl) 0801 40 ld b,b 0802 ab xor e 0803 7c ld a,h 0804 ac xor h 0805 7d ld a,l 0806 ad xor l 0807 7e ld a,(hl) 0808 ae xor (hl) 0809 5d ld e,l 080a af xor a 080b 5b ld e,e ;;=========================================================================== ;; MC PRINT TRANSLATION 080c e7 rst $20 ; RST 4 - LOW: RAM LAM 080d 87 add a,a 080e 3c inc a 080f 4f ld c,a 0810 0600 ld b,$00 0812 1104b8 ld de,$b804 0815 fe2a cp $2a 0817 dca1ba call c,$baa1 ;; HI: KL LDIR 081a c9 ret ;;=========================================================================== ;; MC PRINT CHAR 081b c5 push bc 081c e5 push hl 081d 2104b8 ld hl,$b804 0820 46 ld b,(hl) 0821 04 inc b 0822 05 dec b 0823 280a jr z,$082f ; (+$0a) 0825 23 inc hl 0826 be cp (hl) 0827 23 inc hl 0828 20f8 jr nz,$0822 ; (-$08) 082a 7e ld a,(hl) 082b feff cp $ff 082d 2803 jr z,$0832 ; (+$03) 082f cdf1bd call $bdf1 ; IND: MC WAIT PRINTER 0832 e1 pop hl 0833 c1 pop bc 0834 c9 ret ;;==================================================================== ;; IND: MC WAIT PRINTER 0835 013200 ld bc,$0032 0838 cd5808 call $0858 ; MC BUSY PRINTER 083b 3007 jr nc,$0844 ; MC SEND PRINTER 083d 10f9 djnz $0838 083f 0d dec c 0840 20f6 jr nz,$0838 0842 b7 or a 0843 c9 ret ;;==================================================================== ;; MC SEND PRINTER ;; ;; NOTES: ;; - bits 6..0 of A contain the data ;; - bit 7 of data is /STROBE signal ;; - /STROBE signal is inverted by hardware; therefore 0->1 and 1->0 ;; - data is written with /STROBE pulsed low 0844 c5 push bc 0845 06ef ld b,$ef ; printer I/O address 0847 e67f and $7f ; clear bit 7 (/STROBE) 0849 ed79 out (c),a ; write data with /STROBE=1 084b f680 or $80 ; set bit 7 (/STROBE) 084d f3 di 084e ed79 out (c),a ; write data with /STROBE=0 0850 e67f and $7f ; clear bit 7 (/STROBE) 0852 fb ei 0853 ed79 out (c),a ; write data with /STROBE=1 0855 c1 pop bc 0856 37 scf 0857 c9 ret ;;==================================================================== ;; MC BUSY PRINTER ;; ;; exit: ;; carry = state of BUSY input from printer 0858 c5 push bc 0859 4f ld c,a 085a 06f5 ld b,$f5 ; PPI port B I/O address 085c ed78 in a,(c) ; read PPI port B input 085e 17 rla ; transfer bit 6 into carry (BUSY input from printer) 085f 17 rla 0860 79 ld a,c 0861 c1 pop bc 0862 c9 ret ;;==================================================================== ;; MC SOUND REGISTER ;; ;; entry: ;; A = register index ;; C = register data ;; 0863 f3 di 0864 06f4 ld b,$f4 ; PPI port A I/O address 0866 ed79 out (c),a ; write register index 0868 06f6 ld b,$f6 ; PPI port C I/O address 086a ed78 in a,(c) ; get current outputs of PPI port C I/O port 086c f6c0 or $c0 ; bit 7,6: PSG register select 086e ed79 out (c),a ; write control to PSG. PSG will select register ; referenced by data at PPI port A output 0870 e63f and $3f ; bit 7,6: PSG inactive 0872 ed79 out (c),a ; write control to PSG. 0874 06f4 ld b,$f4 ; PPI port A I/O address 0876 ed49 out (c),c ; write register data 0878 06f6 ld b,$f6 ; PPI port C I/O address 087a 4f ld c,a 087b f680 or $80 ; bit 7,6: PSG write data to selected register 087d ed79 out (c),a ; write control to PSG. PSG will write the data ; at PPI port A into the currently selected register ; bit 7,6: PSG inactive 087f ed49 out (c),c ; write control to PSG 0881 fb ei 0882 c9 ret ;;-------------------------------------------------------------- ;; scan keyboard ;;--------------------------------------------------------------------------------- ;; select PSG port A register 0883 010ef4 ld bc,$f40e ; B = I/O address for PPI port A ; C = 14 (index of PSG I/O port A register) 0886 ed49 out (c),c ; write PSG register index to PPI port A 0888 06f6 ld b,$f6 ; B = I/O address for PPI port C 088a ed78 in a,(c) ; get current port C data 088c e630 and $30 088e 4f ld c,a 088f f6c0 or $c0 ; PSG operation: select register 0891 ed79 out (c),a ; write to PPI port C ; PSG will use data from PPI port A ; to select a register 0893 ed49 out (c),c ;;--------------------------------------------------------------------------------- ;; set PPI port A to input 0895 04 inc b ; B = &f7 (I/O address for PPI control) 0896 3e92 ld a,$92 ; PPI port A: input ; PPI port B: input ; PPI port C (upper and lower): output 0898 ed79 out (c),a ; write to PPI control register ;;--------------------------------------------------------------------------------- 089a c5 push bc 089b cbf1 set 6,c ; PSG: operation: read data from selected register 089d 06f6 ld b,$f6 ; B = I/O address for PPI port C 089f ed49 out (c),c 08a1 06f4 ld b,$f4 ; B = I/O address for PPI port A 08a3 ed78 in a,(c) ; read selected keyboard line ; (keyboard data->PSG port A->PPI port A) 08a5 46 ld b,(hl) ; get previous keyboard line state ; "0" indicates a pressed key ; "1" indicates a released key 08a6 77 ld (hl),a ; store new keyboard line state 08a7 a0 and b ; a bit will be 1 where a key was not pressed ; in the previous keyboard scan and the current keyboard scan. ; a bit will be 0 where a key has been: ; - pressed in previous keyboard scan, released in this keyboard scan ; - not pressed in previous keyboard scan, pressed in this keyboard scan ; - key has been held for previous and this keyboard scan. 08a8 2f cpl ; change so a '1' now indicates held/pressed key ; '0' indicates a key that has not been pressed/held 08a9 12 ld (de),a 08aa 23 inc hl 08ab 13 inc de 08ac 0c inc c 08ad 79 ld a,c 08ae e60f and $0f 08b0 fe0a cp $0a 08b2 20e9 jr nz,$089d ; (-$17) 08b4 c1 pop bc ;; B = I/O address of PPI control register 08b5 3e82 ld a,$82 ; PPI port A: output ; PPI port B: input ; PPI port C (upper and lower): output 08b7 ed79 out (c),a ;; B = I/O address of PPI port C lower 08b9 05 dec b 08ba ed49 out (c),c 08bc c9 ret ;;-------------------------------------------------------------- ;; JUMP RESTORE ;; ;; (restore all the firmware jump routines) ;; main firmware jumpblock 08bd 21de08 ld hl,$08de ; table of addressess for firmware functions 08c0 1100bb ld de,$bb00 ; start of firmware jumpblock 08c3 01cfcb ld bc,$cbcf ; 203 entries 08c6 cdcc08 call $08cc 08c9 01ef20 ld bc,$20ef ; 32 entries 08cc 79 ld a,c 08cd 12 ld (de),a 08ce 13 inc de 08cf eda0 ldi 08d1 03 inc bc 08d2 2f cpl 08d3 07 rlca 08d4 07 rlca 08d5 e680 and $80 08d7 b6 or (hl) 08d8 12 ld (de),a 08d9 13 inc de 08da 23 inc hl 08db 10ef djnz $08cc ; (-$11) 08dd c9 ret ;; each entry is an address (within this ROM) which will perform ;; the associated firmware function 08de: defw &1b5c ;; 0 firmware function: KM INITIALISE defw &1b98 ;; 1 firmware function: KM RESET defw &1bbf ;; 2 firmware function: KM WAIT CHAR defw &1bc5 ;; 3 firmware function: KM READ CHAR defw &1bfa ;; 4 firmware function: KM CHAR RETURN defw &1c46 ;; 5 firmware function: KM SET EXPAND defw &1cb3 ;; 6 firmware function: KM GET EXPAND defw &1c04 ;; 7 firmware function: KM EXP BUFFER defw &1cdb ;; 8 firmware function: KM WAIT KEY defw &1ce1 ;; 9 firmware function: KM READ KEY defw &1e45 ;; 10 firmware function: KM TEST KEY defw &1d38 ;; 11 firmware function: KM GET STATE defw &1de5 ;; 12 firmware function: KM GET JOYSTICK defw &1ed8 ;; 13 firmware function: KM SET TRANSLATE defw &1ec4 ;; 14 firmware function: KM GET TRANSLATE defw &1edd ;; 15 firmware function: KM SET SHIFT defw &1ec9 ;; 16 firmware function: KM GET SHIFT defw &1ee2 ;; 17 firmware function: KM SET CONTROL defw &1ece ;; 18 firmware function: KM GET CONTROL defw &1e34 ;; 19 firmware function: KM SET REPEAT defw &1e2f ;; 20 firmware function: KM GET REPEAT defw &1df6 ;; 21 firmware function: KM SET DELAY defw &1df2 ;; 22 firmware function: KM GET DELAY defw &1dfa ;; 23 firmware function: KM ARM BREAK defw &1e0b ;; 24 firmware function: KM DISARM BREAK defw &1e19 ;; 25 firmware function: KM BREAK EVENT defw &1074 ;; 26 firmware function: TXT INITIALISE defw &1084 ;; 27 firmware function: TXT RESET defw &1459 ;; 28 firmware function: TXT VDU ENABLE defw &1452 ;; 29 firmware function: TXT VDU DISABLE defw &13fe ;; 30 firmware function: TXT OUTPUT defw &1335 ;; 31 firmware function: TXT WR CHAR defw &13ac ;; 32 firmware function: TXT RD CHAR defw &13a8 ;; 33 firmware function: TXT SET GRAPHIC defw &1208 ;; 34 firmware function: TXT WIN ENABLE defw &1252 ;; 35 firmware function: TXT GET WINDOW defw &154f ;; 36 firmware function: TXT CLEAR WINDOW defw &115a ;; 37 firmware function: TXT SET COLUMN defw &1165 ;; 38 firmware function: TXT SET ROW defw &1170 ;; 39 firmware function: TXT SET CURSOR defw &117c ;; 40 firmware function: TXT GET CURSOR defw &1286 ;; 41 firmware function: TXT CUR ENABLE defw &1297 ;; 42 firmware function: TXT CUR DISABLE defw &1276 ;; 43 firmware function: TXT CUR ON defw &127e ;; 44 firmware function: TXT CUR OFF defw &11ca ;; 45 firmware function: TXT VALIDATE defw &1265 ;; 46 firmware function: TXT PLACE CURSOR defw &1265 ;; 47 firmware function: TXT REMOVE CURSOR defw &12a6 ;; 48 firmware function: TXT SET PEN defw &12ba ;; 49 firmware function: TXT GET PEN defw &12ab ;; 50 firmware function: TXT SET PAPER defw &12c0 ;; 51 firmware function: TXT GET PAPER defw &12c6 ;; 52 firmware function: TXT INVERSE defw &137b ;; 53 firmware function: TXT SET BACK defw &1388 ;; 54 firmware function: TXT GET BACK defw &12d4 ;; 55 firmware function: TXT GET MATRIX defw &12f2 ;; 56 firmware function: TXT SET MATRIX defw &12fe ;; 57 firmware function: TXT SET M TABLE defw &132b ;; 58 firmware function: TXT GET M TABLE defw &14d4 ;; 59 firmware function: TXT GET CONTROLS defw &10e4 ;; 60 firmware function: TXT STR SELECT defw &1103 ;; 61 firmware function: TXT SWAP STREAMS defw &15a8 ;; 62 firmware function: GRA INITIALISE defw &15d7 ;; 63 firmware function: GRA RESET defw &15fe ;; 64 firmware function: GRA MOVE ABSOLUTE defw &15fb ;; 65 firmware function: GRA MOVE RELATIVE defw &1606 ;; 66 firmware function: GRA ASK CURSOR defw &160e ;; 67 firmware function: GRA SET ORIGIN defw &161c ;; 68 firmware function: GRA GET ORIGIN defw &16a5 ;; 69 firmware function: GRA WIN WIDTH defw &16ea ;; 70 firmware function: GRA WIN HEIGHT defw &1717 ;; 71 firmware function: GRA GET W WIDTH defw &172d ;; 72 firmware function: GRA GET W HEIGHT defw &1736 ;; 73 firmware function: GRA CLEAR WINDOW defw &1767 ;; 74 firmware function: GRA SET PEN defw &1775 ;; 75 firmware function: GRA GET PEN defw &176e ;; 76 firmware function: GRA SET PAPER defw &177a ;; 77 firmware function: GRA GET PAPER defw &1783 ;; 78 firmware function: GRA PLOT ABSOLUTE defw &1780 ;; 79 firmware function: GRA PLOT RELATIVE defw &1797 ;; 80 firmware function: GRA TEST ABSOLUTE defw &1794 ;; 81 firmware function: GRA TEST RELATIVE defw &17a9 ;; 82 firmware function: GRA LINE ABSOLUTE defw &17a6 ;; 83 firmware function: GRA LINE RELATIVE defw &1940 ;; 84 firmware function: GRA WR CHAR defw &0abf ;; 85 firmware function: SCR INITIALIZE defw &0ad0 ;; 86 firmware function: SCR RESET defw &0b37 ;; 87 firmware function: SCR OFFSET defw &0b3c ;; 88 firmware function: SCR SET BASE defw &0b56 ;; 89 firmware function: SCR GET LOCATION defw &0ae9 ;; 90 firmware function: SCR SET MODE defw &0b0c ;; 91 firmware function: SCR GET MODE defw &0b17 ;; 92 firmware function: SCR CLEAR defw &0b5d ;; 93 firmware function: SCR CHAR LIMITS defw &0b6a ;; 94 firmware function: SCR CHAR POSITION defw &0baf ;; 95 firmware function: SCR DOT POSITION defw &0c05 ;; 96 firmware function: SCR NEXT BYTE defw &0c11 ;; 97 firmware function: SCR PREV BYTE defw &0c1f ;; 98 firmware function: SCR NEXT LINE defw &0c39 ;; 99 firmware function: SCR PREV LINE defw &0c8e ;; 100 firmware function: SCR INK ENCODE defw &0ca7 ;; 101 firmware function: SCR INK DECODE defw &0cf2 ;; 102 firmware function: SCR SET INK defw &0d1a ;; 103 firmware function: SCR GET INK defw &0cf7 ;; 104 firmware function: SCR SET BORDER defw &0d1f ;; 105 firmware function: SCR GET BORDER defw &0cea ;; 106 firmware function: SCR SET FLASHING defw &0cee ;; 107 firmware function: SCR GET FLASHING defw &0db9 ;; 108 firmware function: SCR FILL BOX defw &0dbd ;; 109 firmware function: SCR FLOOD BOX defw &0de5 ;; 110 firmware function: SCR CHAR INVERT defw &0e00 ;; 111 firmware function: SCR HW ROLL defw &0e44 ;; 112 firmware function: SCR SW ROLL defw &0ef9 ;; 113 firmware function: SCR UNPACK defw &0f2a ;; 114 firmware function: SCR REPACK defw &0c55 ;; 115 firmware function: SCR ACCESS defw &0c74 ;; 116 firmware function: SCR PIXELS defw &0f93 ;; 117 firmware function: SCR HORIZONTAL defw &0f9b ;; 118 firmware function: SCR VERTICAL defw &24bc ;; 119 firmware function: CAS INITIALISE defw &24ce ;; 120 firmware function: CAS SET SPEED defw &24e1 ;; 121 firmware function: CAS NOISY defw &2bbb ;; 122 firmware function: CAS START MOTOR defw &2bbf ;; 123 firmware function: CAS STOP MOTOR defw &2bc1 ;; 124 firmware function: CAS RESTORE MOTOR defw &24e5 ;; 125 firmware function: CAS IN OPEN defw &2550 ;; 126 firmware function: CAS IN CLOSE defw &2557 ;; 127 firmware function: CAS IN ABANDON defw &25a0 ;; 128 firmware function: CAS IN CHAR defw &2618 ;; 129 firmware function: CAS IN DIRECT defw &2607 ;; 130 firmware function: CAS RETURN defw &2603 ;; 131 firmware function: CAS TEST EOF defw &24fe ;; 132 firmware function: CAS OUT OPEN defw &257f ;; 133 firmware function: CAS OUT CLOSE defw &2599 ;; 134 firmware function: CAS OUT ABANDON defw &25c6 ;; 135 firmware function: CAS OUT CHAR defw &2653 ;; 136 firmware function: CAS OUT DIRECT defw &2692 ;; 137 firmware function: CAS CATALOG defw &29af ;; 138 firmware function: CAS WRITE defw &29a6 ;; 139 firmware function: CAS READ defw &29c1 ;; 140 firmware function: CAS CHECK defw &1fe9 ;; 141 firmware function: SOUND RESET defw &2114 ;; 142 firmware function: SOUND QUEUE defw &21ce ;; 143 firmware function: SOUND CHECK defw &21eb ;; 144 firmware function: SOUND ARM EVENT defw &21ac ;; 145 firmware function: SOUND RELEASE defw &2050 ;; 146 firmware function: SOUND HOLD defw &206b ;; 147 firmware function: SOUND CONTINUE defw &2495 ;; 148 firmware function: SOUND AMPL ENVELOPE defw &249a ;; 149 firmware function: SOUND TONE ENVELOPE defw &24a6 ;; 150 firmware function: SOUND A ADDRESS defw &24ab ;; 151 firmware function: SOUND T ADDRESS defw &005c ;; 152 firmware function: KL CHOKE OFF defw &0326 ;; 153 firmware function: KL ROM WALK defw &0330 ;; 154 firmware function: KL INIT BACK defw &02a0 ;; 155 firmware function: KL LOG EXT defw &02b1 ;; 156 firmware function: KL FIND COMMAND defw &0163 ;; 157 firmware function: KL NEW FRAME FLY defw &016a ;; 158 firmware function: KL ADD FRAME FLY defw &0170 ;; 159 firmware function: KL DEL FRAME FLY defw &0176 ;; 160 firmware function: KL NEW FAST TICKER defw &017d ;; 161 firmware function: KL ADD FAST TICKER defw &0183 ;; 162 firmware function: KL DEL FAST TICKER defw &01b3 ;; 163 firmware function: KL ADD TICKER defw &01c5 ;; 164 firmware function: KL DEL TICKER defw &01d2 ;; 165 firmware function: KL INIT EVENT defw &01e2 ;; 166 firmware function: KL EVENT defw &0227 ;; 167 firmware function: KL SYNC RESET defw &0284 ;; 168 firmware function: KL DEL SYNCHRONOUS defw &0255 ;; 169 firmware function: KL NEXT SYNC defw &0219 ;; 170 firmware function: KL DO SYNC defw &0276 ;; 171 firmware function: KL DONE SYNC defw &0294 ;; 172 firmware function: KL EVENT DISABLE defw &029a ;; 173 firmware function: KL EVENT ENABLE defw &028d ;; 174 firmware function: KL DISARM EVENT defw &0099 ;; 175 firmware function: KL TIME PLEASE defw &00a3 ;; 176 firmware function: KL TIME SET defw &05ed ;; 177 firmware function: MC BOOT PROGRAM defw &061c ;; 178 firmware function: MC START PROGRAM defw &07b4 ;; 179 firmware function: MC WAIT FLYBACK defw &0776 ;; 180 firmware function: MC SET MODE defw &07c0 ;; 181 firmware function: MC SCREEN OFFSET defw &0786 ;; 182 firmware function: MC CLEAR INKS defw &078c ;; 183 firmware function: MC SET INKS defw &07e0 ;; 184 firmware function: MC RESET PRINTER defw &081b ;; 185 firmware function: MC PRINT CHAR defw &0858 ;; 186 firmware function: MC BUSY PRINTER defw &0844 ;; 187 firmware function: MC SEND PRINTER defw &0863 ;; 188 firmware function: MC SOUND REGISTER defw &08bd ;; 189 firmware function: JUMP RESTORE defw &1d3c ;; 190 firmware function: KM SET LOCKS defw &1bfe ;; 191 firmware function: KM FLUSH defw &1460 ;; 192 firmware function: TXT ASK STATE defw &15ec ;; 193 firmware function: GRA DEFAULT defw &19d5 ;; 194 firmware function: GRA SET BACK defw &17b0 ;; 195 firmware function: GRA SET FIRST defw &17ac ;; 196 firmware function: GRA SET LINE MASK defw &162a ;; 197 firmware function: GRA FROM USER defw &19d9 ;; 198 firmware function: GRA FILL defw &0b45 ;; 199 firmware function: SCR SET POSITION defw &080c ;; 200 firmware function: MC PRINT TRANSLATION defw &0397 ;; 201 firmware function: KL BANK SWITCH defw &2c02 ;; 202 BD5E defw &2f91 ;; 0 BD61 defw &2f9f ;; 1 BD64 defw &2fc8 ;; 2 BD67 defw &2fd9 ;; 3 BD6A defw &3001 ;; 4 BD6D defw &3014 ;; 5 BD70 defw &3055 ;; 6 BD73 defw &305f ;; 7 BD76 defw &30c6 ;; 8 BD79 defw &34a2 ;; 9 BD7C defw &3159 ;; 10 BD7F defw &349e ;; 11 BD82 defw &3577 ;; 12 BD85 defw &3604 ;; 13 BD88 defw &3188 ;; 14 BD8B defw &36df ;; 15 BD8E defw &3731 ;; 16 BD91 defw &3727 ;; 17 BD94 defw &3345 ;; 18 BD97 defw &2f73 ;; 19 BD9A defw &32ac ;; 20 BD9D defw &32af ;; 21 BDA0 defw &31b6 ;; 22 BDA3 defw &31b1 ;; 23 BDA6 defw &322f ;; 24 BDA9 defw &3353 ;; 25 BDAC defw &3349 ;; 26 BDAF defw &33c8 ;; 27 BDB2 defw &33d8 ;; 28 BDB5 defw &2fd1 ;; 29 BDB8 defw &3136 ;; 30 BDBB defw &3143 ;; 31 BDBE ;;========================================================================== ;; used to initialise the firmware indirections ;; this routine is called by each of the firmware "units" ;; i.e. screen pack, graphics pack etc. ;; HL = pointer to start of a table ;; table format: ;; ;; 0 = length of data ;; 1,2 = destination to copy data ;; 3.. = data 0ab4 4e ld c,(hl) 0ab5 06 00 ld b,$00 0ab7 23 inc hl 0ab8 5e ld e,(hl) 0ab9 23 inc hl 0aba 56 ld d,(hl) 0abb 23 inc hl 0abc edb0 ldir 0abe c9 ret ;;=========================================================================== ;; SCR INITIALISE 0abf 115210 ld de,$1052 ;; default colour palette 0ac2 cd8607 call $0786 ;; MC CLEAR INKS 0ac5 3ec0 ld a,$c0 0ac7 32c6b7 ld ($b7c6),a 0aca cdd00a call $0ad0 ;; SCR RESET 0acd c3120b jp $0b12 ;;=========================================================================== ;; SCR RESET 0ad0 af xor a 0ad1 cd550c call $0c55 ;; SCR ACCESS 0ad4 21dd0a ld hl,$0add ;; table used to initialise screen indirections 0ad7 cdb40a call $0ab4 ;; initialise screen pack indirections 0ada c3d80c jp $0cd8 0add defb &09 defw &bde5 0ae0 c38a0c jp $0c8a ;; IND: SCR READ 0ae3 c3710c jp $0c71 ;; IND: SCR WRITE 0ae6 c3170b jp $0b17 ;; IND: SCR MODE CLEAR ;;=========================================================================== ;; SCR SET MODE 0ae9 e603 and $03 0aeb fe03 cp $03 0aed d0 ret nc 0aee f5 push af 0aef cd550d call $0d55 0af2 d1 pop de 0af3 cdb310 call $10b3 0af6 f5 push af 0af7 cdce15 call $15ce 0afa e5 push hl 0afb 7a ld a,d 0afc cd310b call $0b31 0aff cdebbd call $bdeb ; IND: SCR MODE CLEAR 0b02 e1 pop hl 0b03 cdae15 call $15ae 0b06 f1 pop af 0b07 cdd110 call $10d1 0b0a 1822 jr $0b2e ; (+$22) ;;=========================================================================== ;; SCR GET MODE 0b0c 3ac3b7 ld a,($b7c3) 0b0f fe01 cp $01 0b11 c9 ret 0b12 3e01 ld a,$01 0b14 cd310b call $0b31 ;;=========================================================================== ;; IND: SCR MODE CLEAR 0b17 cd550d call $0d55 0b1a 210000 ld hl,$0000 0b1d cd370b call $0b37 ;; SCR OFFSET 0b20 2ac5b7 ld hl,($b7c5) 0b23 2e00 ld l,$00 0b25 54 ld d,h 0b26 1e01 ld e,$01 0b28 01ff3f ld bc,$3fff 0b2b 75 ld (hl),l 0b2c edb0 ldir 0b2e c3420d jp $0d42 ;;=========================================================================== 0b31 32c3b7 ld ($b7c3),a 0b34 c37607 jp $0776 ; MC SET MODE ;;=========================================================================== ;; SCR OFFSET 0b37 3ac6b7 ld a,($b7c6) 0b3a 1803 jr $0b3f ; (+$03) ;;=========================================================================== ;; SCR SET BASE 0b3c 2ac4b7 ld hl,($b7c4) 0b3f cd450b call $0b45 ; SCR SET POSITION 0b42 c3c007 jp $07c0 ; MC SCREEN OFFSET ;;=========================================================================== ;; SCR SET POSITION 0b45 e6c0 and $c0 0b47 32c6b7 ld ($b7c6),a 0b4a f5 push af 0b4b 7c ld a,h 0b4c e607 and $07 0b4e 67 ld h,a 0b4f cb85 res 0,l 0b51 22c4b7 ld ($b7c4),hl 0b54 f1 pop af 0b55 c9 ret ;;=========================================================================== ;; SCR GET LOCATION 0b56 2ac4b7 ld hl,($b7c4) 0b59 3ac6b7 ld a,($b7c6) 0b5c c9 ret ;;====================================================================================== ;; SCR CHAR LIMITS 0b5d cd0c0b call $0b0c ;; SCR GET MODE 0b60 011813 ld bc,$1318 ;; B = 19, C = 24 0b63 d8 ret c 0b64 0627 ld b,$27 ;; 39 0b66 c8 ret z 0b67 064f ld b,$4f ;; 79 ;; B = x limit-1 ;; C = y limit-1 0b69 c9 ret ;;====================================================================================== ;; SCR CHAR POSITION 0b6a d5 push de 0b6b cd0c0b call $0b0c ;; SCR GET MODE 0b6e 0604 ld b,$04 0b70 3805 jr c,$0b77 ; (+$05) 0b72 0602 ld b,$02 0b74 2801 jr z,$0b77 ; (+$01) 0b76 05 dec b 0b77 c5 push bc 0b78 5c ld e,h 0b79 1600 ld d,$00 0b7b 62 ld h,d 0b7c d5 push de 0b7d 54 ld d,h 0b7e 5d ld e,l 0b7f 29 add hl,hl 0b80 29 add hl,hl 0b81 19 add hl,de 0b82 29 add hl,hl 0b83 29 add hl,hl 0b84 29 add hl,hl 0b85 29 add hl,hl 0b86 d1 pop de 0b87 19 add hl,de 0b88 10fd djnz $0b87 ; (-$03) 0b8a ed5bc4b7 ld de,($b7c4) 0b8e 19 add hl,de 0b8f 7c ld a,h 0b90 e607 and $07 0b92 67 ld h,a 0b93 3ac6b7 ld a,($b7c6) 0b96 84 add a,h 0b97 67 ld h,a 0b98 c1 pop bc 0b99 d1 pop de 0b9a c9 ret 0b9b 7b ld a,e 0b9c 95 sub l 0b9d 3c inc a 0b9e 87 add a,a 0b9f 87 add a,a 0ba0 87 add a,a 0ba1 5f ld e,a 0ba2 7a ld a,d 0ba3 94 sub h 0ba4 3c inc a 0ba5 57 ld d,a 0ba6 cd6a0b call $0b6a ; SCR CHAR POSITION 0ba9 af xor a 0baa 82 add a,d 0bab 10fd djnz $0baa ; (-$03) 0bad 57 ld d,a 0bae c9 ret ;;====================================================================================== ;; SCR DOT POSITION 0baf d5 push de 0bb0 eb ex de,hl 0bb1 21c700 ld hl,$00c7 0bb4 b7 or a 0bb5 ed52 sbc hl,de 0bb7 7d ld a,l 0bb8 e607 and $07 0bba 87 add a,a 0bbb 87 add a,a 0bbc 87 add a,a 0bbd 4f ld c,a 0bbe 7d ld a,l 0bbf e6f8 and $f8 0bc1 6f ld l,a 0bc2 54 ld d,h 0bc3 5d ld e,l 0bc4 29 add hl,hl 0bc5 29 add hl,hl 0bc6 19 add hl,de 0bc7 29 add hl,hl 0bc8 d1 pop de 0bc9 c5 push bc 0bca cdf60b call $0bf6 0bcd 78 ld a,b 0bce a3 and e 0bcf 2805 jr z,$0bd6 ; (+$05) 0bd1 cb09 rrc c 0bd3 3d dec a 0bd4 20fb jr nz,$0bd1 ; (-$05) 0bd6 e3 ex (sp),hl 0bd7 61 ld h,c 0bd8 4d ld c,l 0bd9 e3 ex (sp),hl 0bda 78 ld a,b 0bdb 0f rrca 0bdc cb3a srl d 0bde cb1b rr e 0be0 0f rrca 0be1 38f9 jr c,$0bdc ; (-$07) 0be3 19 add hl,de 0be4 ed5bc4b7 ld de,($b7c4) 0be8 19 add hl,de 0be9 7c ld a,h 0bea e607 and $07 0bec 67 ld h,a 0bed 3ac6b7 ld a,($b7c6) 0bf0 84 add a,h 0bf1 81 add a,c 0bf2 67 ld h,a 0bf3 d1 pop de 0bf4 4a ld c,d 0bf5 c9 ret ;;--------------------------------------------------------------------- 0bf6 cd0c0b call $0b0c ;; SCR GET MODE 0bf9 01aa01 ld bc,$01aa 0bfc d8 ret c 0bfd 018803 ld bc,$0388 0c00 c8 ret z 0c01 018007 ld bc,$0780 0c04 c9 ret ;;--------------------------------------------------------------------- ;; firmware function: SCR NEXT BYTE ;; ;; Entry conditions: ;; HL = screen address ;; Exit conditions: ;; HL = updated screen address ;; AF corrupt ;; ;; Assumes: ;; - 16k screen 0c05 2c inc l 0c06 c0 ret nz 0c07 24 inc h 0c08 7c ld a,h 0c09 e607 and $07 0c0b c0 ret nz ;; at this point the address has incremented over a 2048 ;; byte boundary. ;; ;; At this point, the next byte on screen is *not* previous byte plus 1. ;; ;; The following is true: ;; 07FF->0000 ;; 0FFF->0800 ;; 17FF->1000 ;; 1FFF->1800 ;; 27FF->2000 ;; 2FFF->2800 ;; 37FF->3000 ;; 3FFF->3800 ;; ;; The following code adjusts for this case. 0c0c 7c ld a,h 0c0d d608 sub $08 0c0f 67 ld h,a 0c10 c9 ret ;;--------------------------------------------------------------------- ;; firmware function: SCR PREV BYTE ;; ;; Entry conditions: ;; HL = screen address ;; Exit conditions: ;; HL = updated screen address ;; AF corrupt ;; ;; Assumes: ;; - 16k screen 0c11 7d ld a,l 0c12 2d dec l 0c13 b7 or a 0c14 c0 ret nz 0c15 7c ld a,h 0c16 25 dec h 0c17 e607 and $07 0c19 c0 ret nz 0c1a 7c ld a,h 0c1b c608 add a,$08 0c1d 67 ld h,a 0c1e c9 ret ;;--------------------------------------------------------------------- ;; firmware function: SCR NEXT LINE ;; ;; Entry conditions: ;; HL = screen address ;; Exit conditions: ;; HL = updated screen address ;; AF corrupt ;; ;; Assumes: ;; - 16k screen ;; - 80 bytes per line (40 CRTC characters per line) 0c1f 7c ld a,h 0c20 c608 add a,$08 0c22 67 ld h,a 0c23 e638 and $38 0c25 c0 ret nz ;; 0c26 7c ld a,h 0c27 d640 sub $40 0c29 67 ld h,a 0c2a 7d ld a,l 0c2b c650 add a,$50 ;; number of bytes per line 0c2d 6f ld l,a 0c2e d0 ret nc 0c2f 24 inc h 0c30 7c ld a,h 0c31 e607 and $07 0c33 c0 ret nz 0c34 7c ld a,h 0c35 d608 sub $08 0c37 67 ld h,a 0c38 c9 ret ;;--------------------------------------------------------------------- ;; firmware function: SCR PREV LINE ;; ;; Entry conditions: ;; HL = screen address ;; Exit conditions: ;; HL = updated screen address ;; AF corrupt ;; ;; Assumes: ;; - 16k screen ;; - 80 bytes per line (40 CRTC characters per line) 0c39 7c ld a,h 0c3a d608 sub $08 0c3c 67 ld h,a 0c3d e638 and $38 0c3f fe38 cp $38 0c41 c0 ret nz 0c42 7c ld a,h 0c43 c640 add a,$40 0c45 67 ld h,a 0c46 7d ld a,l 0c47 d650 sub $50 ;; number of bytes per line 0c49 6f ld l,a 0c4a d0 ret nc 0c4b 7c ld a,h 0c4c 25 dec h 0c4d e607 and $07 0c4f c0 ret nz 0c50 7c ld a,h 0c51 c608 add a,$08 0c53 67 ld h,a 0c54 c9 ret ;;============================================================================ ;; SCR ACCESS ;; ;; A = write mode: ;; 0 -> fill ;; 1 -> XOR ;; 2 -> AND ;; 3 -> OR 0c55 e603 and $03 0c57 21740c ld hl,$0c74 ; SCR PIXELS 0c5a 280c jr z,$0c68 ; (+$0c) 0c5c fe02 cp $02 0c5e 2e7a ld l,$7a 0c60 3806 jr c,$0c68 ; (+$06) 0c62 2e7f ld l,$7f 0c64 2802 jr z,$0c68 ; (+$02) 0c66 2e85 ld l,$85 ;; HL = address of screen write function ;; initialise jump for IND: SCR WRITE 0c68 3ec3 ld a,$c3 0c6a 32c7b7 ld ($b7c7),a 0c6d 22c8b7 ld ($b7c8),hl 0c70 c9 ret ;;================================================================================== ;; IND: SCR WRITE ;; jump initialised by SCR ACCESS 0c71 c3c7b7 jp $b7c7 ;;============================================================================ ;; SCR PIXELS ;; (write mode fill) 0c74 78 ld a,b 0c75 ae xor (hl) 0c76 a1 and c 0c77 ae xor (hl) 0c78 77 ld (hl),a 0c79 c9 ret ;;---------------------------------------------------------------------------- ;; screen write access mode ;; (write mode XOR) 0c7a 78 ld a,b 0c7b a1 and c 0c7c ae xor (hl) 0c7d 77 ld (hl),a 0c7e c9 ret ;;---------------------------------------------------------------------------- ;; screen write access mode ;; ;; (write mode AND) 0c7f 79 ld a,c 0c80 2f cpl 0c81 b0 or b 0c82 a6 and (hl) 0c83 77 ld (hl),a 0c84 c9 ret ;;---------------------------------------------------------------------------- ;; screen write access mode ;; ;; (write mode OR) 0c85 78 ld a,b 0c86 a1 and c 0c87 b6 or (hl) 0c88 77 ld (hl),a 0c89 c9 ret ;;================================================================================== ;; IND: SCR READ 0c8a 7e ld a,(hl) 0c8b c3b20c jp $0cb2 0c8e c5 push bc 0c8f d5 push de 0c90 cdc80c call $0cc8 0c93 5f ld e,a 0c94 cdf60b call $0bf6 0c97 0608 ld b,$08 0c99 cb0b rrc e 0c9b 17 rla 0c9c cb09 rrc c 0c9e 3802 jr c,$0ca2 ; (+$02) 0ca0 cb03 rlc e 0ca2 10f5 djnz $0c99 ; (-$0b) 0ca4 d1 pop de 0ca5 c1 pop bc 0ca6 c9 ret ;;============================================================================ ;; SCR INK ENCODE 0ca7 c5 push bc 0ca8 f5 push af 0ca9 cdf60b call $0bf6 0cac f1 pop af 0cad cdb20c call $0cb2 0cb0 c1 pop bc 0cb1 c9 ret 0cb2 d5 push de 0cb3 110800 ld de,$0008 0cb6 0f rrca 0cb7 cb12 rl d 0cb9 cb09 rrc c 0cbb 3802 jr c,$0cbf ; (+$02) 0cbd cb1a rr d 0cbf 1d dec e 0cc0 20f4 jr nz,$0cb6 ; (-$0c) 0cc2 7a ld a,d 0cc3 cdc80c call $0cc8 0cc6 d1 pop de 0cc7 c9 ret 0cc8 57 ld d,a 0cc9 cd0c0b call $0b0c ;; SCR GET MODE 0ccc 7a ld a,d 0ccd d0 ret nc 0cce 0f rrca 0ccf 0f rrca 0cd0 ce00 adc a,$00 0cd2 0f rrca 0cd3 9f sbc a,a 0cd4 e606 and $06 0cd6 aa xor d 0cd7 c9 ret 0cd8 215210 ld hl,$1052 ;; default colour palette 0cdb 11d4b7 ld de,$b7d4 0cde 012200 ld bc,$0022 0ce1 edb0 ldir 0ce3 af xor a 0ce4 32f6b7 ld ($b7f6),a 0ce7 210a0a ld hl,$0a0a ;;============================================================================ ;; SCR SET FLASHING 0cea 22d2b7 ld ($b7d2),hl 0ced c9 ret ;;============================================================================ ;; SCR GET FLASHING 0cee 2ad2b7 ld hl,($b7d2) 0cf1 c9 ret ;;============================================================================ ;; SCR SET INK 0cf2 e60f and $0f 0cf4 3c inc a 0cf5 1801 jr $0cf8 ; (+$01) ;;============================================================================ ;; SCR SET BORDER 0cf7 af xor a ;;---------------------------------------------------------------------------- ;; SCR SET INK/SCR SET BORDER ;; ;; A = internal pen number ;; B = ink 1 (firmware colour number) ;; C = ink 2 (firmware colour number) ;; 0 = border ;; 1 = colour 0 ;; 2 = colour 1 ;; ... ;; 16 = colour 15 0cf8 5f ld e,a 0cf9 78 ld a,b 0cfa cd100d call $0d10 ; lookup address of hardware colour number in conversion ; table using software colour number 0cfd 46 ld b,(hl) ; get hardware colour number for ink 1 0cfe 79 ld a,c 0cff cd100d call $0d10 ; lookup address of hardware colour number in conversion ; table using software colour number 0d02 4e ld c,(hl) ; get hardware colour number for ink 2 0d03 7b ld a,e 0d04 cd350d call $0d35 ; get address of pen in both palette's in RAM 0d07 71 ld (hl),c ; write ink 2 0d08 eb ex de,hl 0d09 70 ld (hl),b ; write ink 1 0d0a 3eff ld a,$ff 0d0c 32f7b7 ld ($b7f7),a 0d0f c9 ret ;;============================================================================ ;; input: ;; A = software colour number ;; output: ;; HL = address of element in table. Element is corresponding hardware colour number. 0d10 e61f and $1f 0d12 c699 add a,$99 0d14 6f ld l,a 0d15 ce0d adc a,$0d 0d17 95 sub l 0d18 67 ld h,a 0d19 c9 ret ;;============================================================================ ;; SCR GET INK 0d1a e60f and $0f 0d1c 3c inc a 0d1d 1801 jr $0d20 ; (+$01) ;;============================================================================ ;; SCR GET BORDER 0d1f af xor a ;;---------------------------------------------------------------------------- ;; SCR GET INK/SCR GET BORDER ;; entry: ;; A = internal pen number ;; 0 = border ;; 1 = colour 0 ;; 2 = colour 1 ;; ... ;; 16 = colour 15 ;; exit: ;; B = ink 1 (software colour number) ;; C = ink 2 (software colour number) 0d20 cd350d call $0d35 ; get address of pen in both palette's in RAM 0d23 1a ld a,(de) ; ink 2 0d24 5e ld e,(hl) ; ink 1 0d25 cd2a0d call $0d2a ; lookup hardware colour number for ink 2 0d28 41 ld b,c ;; lookup hardware colour number for ink 1 0d29 7b ld a,e ;;---------------------------------------------------------------------------- ;; lookup software colour number which corresponds to the hardware colour number ;; entry: ;; A = hardware colour number ;; exit: ;; C = index in table (same as software colour number) 0d2a 0e00 ld c,$00 0d2c 21990d ld hl,$0d99 ; table to convert from software colour ; number to hardware colour number ;;---------- 0d2f be cp (hl) ; same as this entry in the table? 0d30 c8 ret z ; zero set if entry is the same, zero clear if entry is different 0d31 23 inc hl 0d32 0c inc c 0d33 18fa jr $0d2f ;;============================================================================ ;; ;; The firmware stores two palette's in RAM, this allows a pen to have a flashing ink. ;; ;; get address of palette entry for corresponding ink for both palettes in RAM. ;; ;; entry: ;; A = pen number ;; 0 = border ;; 1 = colour 0 ;; 2 = colour 1 ;; ... ;; 16 = colour 15 ;; ;; exit: ;; HL = address of element in palette 2 ;; DE = address of element in palette 1 0d35 5f ld e,a 0d36 1600 ld d,$00 0d38 21e5b7 ld hl,$b7e5 ; palette 2 start 0d3b 19 add hl,de 0d3c eb ex de,hl 0d3d 21efff ld hl,$ffef ; palette 1 start (B7D4) 0d40 19 add hl,de 0d41 c9 ret ;;============================================================================ 0d42 21f9b7 ld hl,$b7f9 0d45 e5 push hl 0d46 cd7001 call $0170 ; KL DEL FRAME FLY 0d49 cd730d call $0d73 0d4c 11610d ld de,$0d61 0d4f 0681 ld b,$81 0d51 e1 pop hl 0d52 c36301 jp $0163 ; KL NEW FRAME FLY ;;================================================================================== 0d55 21f9b7 ld hl,$b7f9 0d58 cd7001 call $0170 ; KL DEL FRAME FLY 0d5b cd870d call $0d87 0d5e c38607 jp $0786 ; MC CLEAR INKS 0d61 21f8b7 ld hl,$b7f8 0d64 35 dec (hl) 0d65 280c jr z,$0d73 ; (+$0c) 0d67 2b dec hl 0d68 7e ld a,(hl) 0d69 b7 or a 0d6a c8 ret z 0d6b cd870d call $0d87 0d6e cd8c07 call $078c ; MC SET INKS 0d71 180f jr $0d82 ; (+$0f) ;;================================================================================== 0d73 cd870d call $0d87 0d76 32f8b7 ld ($b7f8),a 0d79 cd8c07 call $078c ; MC SET INKS 0d7c 21f6b7 ld hl,$b7f6 0d7f 7e ld a,(hl) 0d80 2f cpl 0d81 77 ld (hl),a 0d82 af xor a 0d83 32f7b7 ld ($b7f7),a 0d86 c9 ret ;;=========================================================================== 0d87 11e5b7 ld de,$b7e5 0d8a 3af6b7 ld a,($b7f6) 0d8d b7 or a 0d8e 3ad3b7 ld a,($b7d3) 0d91 c8 ret z ;;=========================================================================== 0d92 11d4b7 ld de,$b7d4 0d95 3ad2b7 ld a,($b7d2) 0d98 c9 ret ;;--------------------------------------------------------------------------- ;; table to convert from software colour number to hardware colour number 0d99 defb &14,&04,&15,&1c,&18,&1d,&0c,&05,&0d,&16,&06,&17,&1e,&00,&1f,&0e,&07,&0f defb &12,&02,&13,&1a,&19,&1b,&0a,&03,&0b,&01,&08,&09,&10,&11 ;;============================================================================ ;; SCR FILL BOX 0db9 4f ld c,a 0dba cd9b0b call $0b9b ;;============================================================================ ;; SCR FLOOD BOX 0dbd e5 push hl 0dbe 7a ld a,d 0dbf cdee0e call $0eee 0dc2 3009 jr nc,$0dcd ; (+$09) 0dc4 42 ld b,d 0dc5 71 ld (hl),c 0dc6 cd050c call $0c05 ; SCR NEXT BYTE 0dc9 10fa djnz $0dc5 ; (-$06) 0dcb 1810 jr $0ddd ; (+$10) 0dcd c5 push bc 0dce d5 push de 0dcf 71 ld (hl),c 0dd0 15 dec d 0dd1 2808 jr z,$0ddb ; (+$08) 0dd3 4a ld c,d 0dd4 0600 ld b,$00 0dd6 54 ld d,h 0dd7 5d ld e,l 0dd8 13 inc de 0dd9 edb0 ldir 0ddb d1 pop de 0ddc c1 pop bc 0ddd e1 pop hl 0dde cd1f0c call $0c1f ; SCR NEXT LINE 0de1 1d dec e 0de2 20d9 jr nz,$0dbd ; (-$27) 0de4 c9 ret ;;============================================================================ ;; SCR CHAR INVERT 0de5 78 ld a,b 0de6 a9 xor c 0de7 4f ld c,a 0de8 cd6a0b call $0b6a ; SCR CHAR POSITION 0deb 1608 ld d,$08 0ded e5 push hl 0dee c5 push bc 0def 7e ld a,(hl) 0df0 a9 xor c 0df1 77 ld (hl),a 0df2 cd050c call $0c05 ; SCR NEXT LINE 0df5 10f8 djnz $0def ; (-$08) 0df7 c1 pop bc 0df8 e1 pop hl 0df9 cd1f0c call $0c1f ; SCR NEXT LINE 0dfc 15 dec d 0dfd 20ee jr nz,$0ded ; (-$12) 0dff c9 ret ;;============================================================================ ;; SCR HW ROLL 0e00 4f ld c,a 0e01 c5 push bc 0e02 11d0ff ld de,$ffd0 0e05 0630 ld b,$30 0e07 cd2a0e call $0e2a 0e0a c1 pop bc 0e0b cdb407 call $07b4 ; MC WAIT FLYBACK 0e0e 78 ld a,b 0e0f b7 or a 0e10 200d jr nz,$0e1f ; (+$0d) 0e12 11b0ff ld de,$ffb0 0e15 cd3d0e call $0e3d 0e18 110000 ld de,$0000 0e1b 0620 ld b,$20 0e1d 180b jr $0e2a ; (+$0b) 0e1f 115000 ld de,$0050 0e22 cd3d0e call $0e3d 0e25 11b0ff ld de,$ffb0 0e28 0620 ld b,$20 0e2a 2ac4b7 ld hl,($b7c4) 0e2d 19 add hl,de 0e2e 7c ld a,h 0e2f e607 and $07 0e31 67 ld h,a 0e32 3ac6b7 ld a,($b7c6) 0e35 84 add a,h 0e36 67 ld h,a 0e37 50 ld d,b 0e38 1e08 ld e,$08 0e3a c3bd0d jp $0dbd ;; SCR FLOOD BOX 0e3d 2ac4b7 ld hl,($b7c4) 0e40 19 add hl,de 0e41 c3370b jp $0b37 ;; SCR OFFSET ;;============================================================================ ;; SCR SW ROLL 0e44 f5 push af 0e45 78 ld a,b 0e46 b7 or a 0e47 2830 jr z,$0e79 ; (+$30) 0e49 e5 push hl 0e4a cd9b0b call $0b9b 0e4d e3 ex (sp),hl 0e4e 2c inc l 0e4f cd6a0b call $0b6a ; SCR CHAR POSITION 0e52 4a ld c,d 0e53 7b ld a,e 0e54 d608 sub $08 0e56 47 ld b,a 0e57 2817 jr z,$0e70 ; (+$17) 0e59 d1 pop de 0e5a cdb407 call $07b4 ; MC WAIT FLYBACK 0e5d c5 push bc 0e5e e5 push hl 0e5f d5 push de 0e60 cdaa0e call $0eaa 0e63 e1 pop hl 0e64 cd1f0c call $0c1f ; SCR NEXT LINE 0e67 eb ex de,hl 0e68 e1 pop hl 0e69 cd1f0c call $0c1f ; SCR NEXT LINE 0e6c c1 pop bc 0e6d 10ee djnz $0e5d ; (-$12) 0e6f d5 push de 0e70 e1 pop hl 0e71 51 ld d,c 0e72 1e08 ld e,$08 0e74 f1 pop af 0e75 4f ld c,a 0e76 c3bd0d jp $0dbd ;; SCR FLOOD BOX 0e79 e5 push hl 0e7a d5 push de 0e7b cd9b0b call $0b9b 0e7e 4a ld c,d 0e7f 7b ld a,e 0e80 d608 sub $08 0e82 47 ld b,a 0e83 d1 pop de 0e84 e3 ex (sp),hl 0e85 28e9 jr z,$0e70 ; (-$17) 0e87 c5 push bc 0e88 6b ld l,e 0e89 54 ld d,h 0e8a 1c inc e 0e8b cd6a0b call $0b6a ; SCR CHAR POSITION 0e8e eb ex de,hl 0e8f cd6a0b call $0b6a ; SCR CHAR POSITION 0e92 c1 pop bc 0e93 cdb407 call $07b4 ; MC WAIT FLYBACK 0e96 cd390c call $0c39 ; SCR PREV LINE 0e99 e5 push hl 0e9a eb ex de,hl 0e9b cd390c call $0c39 ; SCR PREV LINE 0e9e e5 push hl 0e9f c5 push bc 0ea0 cdaa0e call $0eaa 0ea3 c1 pop bc 0ea4 d1 pop de 0ea5 e1 pop hl 0ea6 10ee djnz $0e96 ; (-$12) 0ea8 18c6 jr $0e70 ; (-$3a) 0eaa 0600 ld b,$00 0eac cdec0e call $0eec 0eaf 3816 jr c,$0ec7 ; (+$16) 0eb1 cdec0e call $0eec 0eb4 3025 jr nc,$0edb ; (+$25) 0eb6 c5 push bc 0eb7 af xor a 0eb8 95 sub l 0eb9 4f ld c,a 0eba edb0 ldir 0ebc c1 pop bc 0ebd 2f cpl 0ebe 3c inc a 0ebf 81 add a,c 0ec0 4f ld c,a 0ec1 7c ld a,h 0ec2 d608 sub $08 0ec4 67 ld h,a 0ec5 1814 jr $0edb ; (+$14) 0ec7 cdec0e call $0eec 0eca 3812 jr c,$0ede ; (+$12) 0ecc c5 push bc 0ecd af xor a 0ece 93 sub e 0ecf 4f ld c,a 0ed0 edb0 ldir 0ed2 c1 pop bc 0ed3 2f cpl 0ed4 3c inc a 0ed5 81 add a,c 0ed6 4f ld c,a 0ed7 7a ld a,d 0ed8 d608 sub $08 0eda 57 ld d,a 0edb edb0 ldir 0edd c9 ret 0ede 41 ld b,c 0edf 7e ld a,(hl) 0ee0 12 ld (de),a 0ee1 cd050c call $0c05 ; SCR NEXT LINE 0ee4 eb ex de,hl 0ee5 cd050c call $0c05 ; SCR NEXT LINE 0ee8 eb ex de,hl 0ee9 10f4 djnz $0edf ; (-$0c) 0eeb c9 ret 0eec 79 ld a,c 0eed eb ex de,hl 0eee 3d dec a 0eef 85 add a,l 0ef0 d0 ret nc 0ef1 7c ld a,h 0ef2 e607 and $07 0ef4 ee07 xor $07 0ef6 c0 ret nz 0ef7 37 scf 0ef8 c9 ret ;;============================================================================ ;; SCR UNPACK 0ef9 cd0c0b call $0b0c ;; SCR GET MODE 0efc 380d jr c,$0f0b ; (+$0d) 0efe 2806 jr z,$0f06 ; (+$06) 0f00 010800 ld bc,$0008 0f03 edb0 ldir 0f05 c9 ret 0f06 018802 ld bc,$0288 0f09 1803 jr $0f0e ; (+$03) 0f0b 01aa04 ld bc,$04aa 0f0e 3e08 ld a,$08 0f10 f5 push af 0f11 e5 push hl 0f12 6e ld l,(hl) 0f13 60 ld h,b 0f14 af xor a 0f15 cb05 rlc l 0f17 3001 jr nc,$0f1a ; (+$01) 0f19 b1 or c 0f1a cb09 rrc c 0f1c 30f7 jr nc,$0f15 ; (-$09) 0f1e 12 ld (de),a 0f1f 13 inc de 0f20 10f2 djnz $0f14 ; (-$0e) 0f22 44 ld b,h 0f23 e1 pop hl 0f24 23 inc hl 0f25 f1 pop af 0f26 3d dec a 0f27 20e7 jr nz,$0f10 ; (-$19) 0f29 c9 ret ;;============================================================================ ;; SCR REPACK 0f2a 4f ld c,a 0f2b cd6a0b call $0b6a ; SCR CHAR POSITION 0f2e cd0c0b call $0b0c ; SCR GET MODE 0f31 0608 ld b,$08 0f33 3836 jr c,$0f6b ; (+$36) 0f35 280b jr z,$0f42 ; (+$0b) 0f37 7e ld a,(hl) 0f38 a9 xor c 0f39 2f cpl 0f3a 12 ld (de),a 0f3b 13 inc de 0f3c cd1f0c call $0c1f ; SCR NEXT LINE 0f3f 10f6 djnz $0f37 ; (-$0a) 0f41 c9 ret 0f42 c5 push bc 0f43 e5 push hl 0f44 d5 push de 0f45 cd5a0f call $0f5a 0f48 cd050c call $0c05 ; SCR NEXT LINE 0f4b cd5a0f call $0f5a 0f4e 7b ld a,e 0f4f d1 pop de 0f50 12 ld (de),a 0f51 13 inc de 0f52 e1 pop hl 0f53 cd1f0c call $0c1f ; SCR NEXT LINE 0f56 c1 pop bc 0f57 10e9 djnz $0f42 ; (-$17) 0f59 c9 ret 0f5a 1688 ld d,$88 0f5c 0604 ld b,$04 0f5e 7e ld a,(hl) 0f5f a9 xor c 0f60 a2 and d 0f61 2001 jr nz,$0f64 ; (+$01) 0f63 37 scf 0f64 cb13 rl e 0f66 cb0a rrc d 0f68 10f4 djnz $0f5e ; (-$0c) 0f6a c9 ret 0f6b c5 push bc 0f6c e5 push hl 0f6d d5 push de 0f6e 0604 ld b,$04 0f70 7e ld a,(hl) 0f71 a9 xor c 0f72 e6aa and $aa 0f74 2001 jr nz,$0f77 ; (+$01) 0f76 37 scf 0f77 cb13 rl e 0f79 7e ld a,(hl) 0f7a a9 xor c 0f7b e655 and $55 0f7d 2001 jr nz,$0f80 ; (+$01) 0f7f 37 scf 0f80 cb13 rl e 0f82 cd050c call $0c05 ; SCR NEXT LINE 0f85 10e9 djnz $0f70 ; (-$17) 0f87 7b ld a,e 0f88 d1 pop de 0f89 12 ld (de),a 0f8a 13 inc de 0f8b e1 pop hl 0f8c cd1f0c call $0c1f ; SCR NEXT LINE 0f8f c1 pop bc 0f90 10d9 djnz $0f6b ; (-$27) 0f92 c9 ret ;;============================================================================ ;; SOUND ARM EVENT 0f93 cdad0f call $0fad 0f96 cdc20f call $0fc2 0f99 1806 jr $0fa1 ; (+$06) ;;============================================================================ ;; SCR VERTICAL 0f9b cdad0f call $0fad 0f9e cd1610 call $1016 0fa1 2a02b8 ld hl,($b802) 0fa4 7d ld a,l 0fa5 32a3b6 ld ($b6a3),a 0fa8 7c ld a,h 0fa9 32b3b6 ld ($b6b3),a 0fac c9 ret 0fad e5 push hl 0fae 2aa3b6 ld hl,($b6a3) 0fb1 32a3b6 ld ($b6a3),a 0fb4 3ab3b6 ld a,($b6b3) 0fb7 67 ld h,a 0fb8 3eff ld a,$ff 0fba 32b3b6 ld ($b6b3),a 0fbd 2202b8 ld ($b802),hl 0fc0 e1 pop hl 0fc1 c9 ret 0fc2 37 scf 0fc3 cd3b10 call $103b 0fc6 cb00 rlc b 0fc8 79 ld a,c 0fc9 3013 jr nc,$0fde ; (+$13) 0fcb 1d dec e 0fcc 2003 jr nz,$0fd1 ; (+$03) 0fce 15 dec d 0fcf 282c jr z,$0ffd ; (+$2c) 0fd1 cb09 rrc c 0fd3 3828 jr c,$0ffd ; (+$28) 0fd5 cb78 bit 7,b 0fd7 2824 jr z,$0ffd ; (+$24) 0fd9 b1 or c 0fda cb00 rlc b 0fdc 18ed jr $0fcb ; (-$13) 0fde 1d dec e 0fdf 2003 jr nz,$0fe4 ; (+$03) 0fe1 15 dec d 0fe2 280d jr z,$0ff1 ; (+$0d) 0fe4 cb09 rrc c 0fe6 3809 jr c,$0ff1 ; (+$09) 0fe8 cb78 bit 7,b 0fea 2005 jr nz,$0ff1 ; (+$05) 0fec b1 or c 0fed cb00 rlc b 0fef 18ed jr $0fde ; (-$13) 0ff1 c5 push bc 0ff2 4f ld c,a 0ff3 3aa4b6 ld a,($b6a4) 0ff6 47 ld b,a 0ff7 3ab4b6 ld a,($b6b4) 0ffa b7 or a 0ffb 1807 jr $1004 ; (+$07) 0ffd c5 push bc 0ffe 4f ld c,a 0fff 3aa3b6 ld a,($b6a3) 1002 47 ld b,a 1003 af xor a 1004 cce8bd call z,$bde8 ; IND: SCR WRITE 1007 c1 pop bc 1008 cb79 bit 7,c 100a c4050c call nz,$0c05 ; SCR NEXT LINE 100d 7a ld a,d 100e b3 or e 100f 20b5 jr nz,$0fc6 ; (-$4b) 1011 78 ld a,b 1012 32b3b6 ld ($b6b3),a 1015 c9 ret 1016 b7 or a 1017 cd3b10 call $103b 101a cb00 rlc b 101c 3aa3b6 ld a,($b6a3) 101f 3809 jr c,$102a ; (+$09) 1021 3ab4b6 ld a,($b6b4) 1024 b7 or a 1025 2009 jr nz,$1030 ; (+$09) 1027 3aa4b6 ld a,($b6a4) 102a c5 push bc 102b 47 ld b,a 102c cde8bd call $bde8 ; IND: SCR WRITE 102f c1 pop bc 1030 cd390c call $0c39 ; SCR PREV LINE 1033 1d dec e 1034 20e4 jr nz,$101a ; (-$1c) 1036 15 dec d 1037 20e1 jr nz,$101a ; (-$1f) 1039 18d6 jr $1011 ; (-$2a) 103b e5 push hl 103c 3002 jr nc,$1040 ; (+$02) 103e 62 ld h,d 103f 6b ld l,e 1040 b7 or a 1041 ed42 sbc hl,bc 1043 cd3919 call $1939 1046 24 inc h 1047 2c inc l 1048 e3 ex (sp),hl 1049 cdaf0b call $0baf ; SCR DOT POSITION 104c 3ab3b6 ld a,($b6b3) 104f 47 ld b,a 1050 d1 pop de 1051 c9 ret ;;--------------------------------------------------------------------------- ;; default colour palette ;; uses hardware colour numbers ;; ;; There are two palettes here; so that flashing colours can be defined. 1052 defb &04,&04,&0a,&13,&0c,&0b,&14,&15,&0d,&06,&1e,&1f,&07,&12,&19,&04,&17 defb &04,&04,&0a,&13,&0c,&0b,&14,&15,&0d,&06,&1e,&1f,&07,&12,&19,&0a,&07 ;;=========================================================================== ;; TXT INITIALISE 1074 cd8410 call $1084 ;; TXT RESET 1077 af xor a 1078 3235b7 ld ($b735),a 107b 210100 ld hl,$0001 107e cd3911 call $1139 1081 c39f10 jp $109f ;;=========================================================================== ;; TXT RESET 1084 218d10 ld hl,$108d ;; table used to initialise text vdu indirections 1087 cdb40a call $0ab4 ;; initialise text vdu indirections 108a c36414 jp $1464 ;; initialise control code handler functions 108d defb &f defw &bdcd jp $125f ;; IND: TXT DRAW CURSOR jp $125f ;; IND: TXT UNDRAW CURSOR jp $134b ;; IND: TXT WRITE CHAR jp $13be ;; IND: TXT UNWRITE jp $140a ;; IND: TXT OUT ACTION ;;=========================================================================== 109f 3e08 ld a,$08 10a1 11b6b6 ld de,$b6b6 10a4 2126b7 ld hl,$b726 10a7 010e00 ld bc,$000e 10aa edb0 ldir 10ac 3d dec a 10ad 20f5 jr nz,$10a4 ; (-$0b) 10af 32b5b6 ld ($b6b5),a 10b2 c9 ret ;;================================================================================== 10b3 3ab5b6 ld a,($b6b5) 10b6 4f ld c,a 10b7 0608 ld b,$08 10b9 78 ld a,b 10ba 3d dec a 10bb cde410 call $10e4 ; TXT STR SELECT 10be cdd0bd call $bdd0 ; IND: TXT UNDRAW CURSOR 10c1 cdc012 call $12c0 ; TXT GET PAPER 10c4 3230b7 ld ($b730),a 10c7 cdba12 call $12ba ; TXT GET PEN 10ca 322fb7 ld ($b72f),a 10cd 10ea djnz $10b9 ; (-$16) 10cf 79 ld a,c 10d0 c9 ret ;;================================================================================== 10d1 4f ld c,a 10d2 0608 ld b,$08 10d4 78 ld a,b 10d5 3d dec a 10d6 cde410 call $10e4 ; TXT STR SELECT 10d9 c5 push bc 10da 2a2fb7 ld hl,($b72f) 10dd cd3911 call $1139 10e0 c1 pop bc 10e1 10f1 djnz $10d4 ; (-$0f) 10e3 79 ld a,c ;;================================================================================== ;; TXT STR SELECT 10e4 e607 and $07 10e6 21b5b6 ld hl,$b6b5 10e9 be cp (hl) 10ea c8 ret z 10eb c5 push bc 10ec d5 push de 10ed 4e ld c,(hl) 10ee 77 ld (hl),a 10ef 47 ld b,a 10f0 79 ld a,c 10f1 cd2611 call $1126 10f4 cd1e11 call $111e 10f7 78 ld a,b 10f8 cd2611 call $1126 10fb eb ex de,hl 10fc cd1e11 call $111e 10ff 79 ld a,c 1100 d1 pop de 1101 c1 pop bc 1102 c9 ret ;;=========================================================================== ;; TXT SWAP STREAMS 1103 3ab5b6 ld a,($b6b5) 1106 f5 push af 1107 79 ld a,c 1108 cde410 call $10e4 110b 78 ld a,b 110c 32b5b6 ld ($b6b5),a 110f cd2611 call $1126 1112 d5 push de 1113 79 ld a,c 1114 cd2611 call $1126 1117 e1 pop hl 1118 cd1e11 call $111e 111b f1 pop af 111c 18c6 jr $10e4 ; (-$3a) ;;=========================================================================== 111e c5 push bc 111f 010e00 ld bc,$000e 1122 edb0 ldir 1124 c1 pop bc 1125 c9 ret ;;=========================================================================== 1126 e607 and $07 1128 5f ld e,a 1129 87 add a,a 112a 83 add a,e 112b 87 add a,a 112c 83 add a,e 112d 87 add a,a 112e c6b6 add a,$b6 1130 5f ld e,a 1131 ceb6 adc a,$b6 1133 93 sub e 1134 57 ld d,a 1135 2126b7 ld hl,$b726 1138 c9 ret ;;=========================================================================== 1139 eb ex de,hl 113a 3e83 ld a,$83 113c 322eb7 ld ($b72e),a 113f 7a ld a,d 1140 cdab12 call $12ab ; TXT SET PAPER 1143 7b ld a,e 1144 cda612 call $12a6 ; TXT SET PEN 1147 af xor a 1148 cda813 call $13a8 ; TXT SET GRAPHIC 114b cd7b13 call $137b ; TXT SET BACK 114e 210000 ld hl,$0000 1151 117f7f ld de,$7f7f 1154 cd0812 call $1208 ; TXT WIN ENABLE 1157 c35914 jp $1459 ; TXT VDU ENABLE ;;=========================================================================== ;; TXT SET COLUMN 115a 3d dec a 115b 212ab7 ld hl,$b72a 115e 86 add a,(hl) 115f 2a26b7 ld hl,($b726) 1162 67 ld h,a 1163 180e jr $1173 ;; undraw cursor, set cursor position and draw it ;;=========================================================================== ;; TXT SET ROW 1165 3d dec a 1166 2129b7 ld hl,$b729 1169 86 add a,(hl) 116a 2a26b7 ld hl,($b726) 116d 6f ld l,a 116e 1803 jr $1173 ;; undraw cursor, set cursor position and draw it ;;=========================================================================== ;; TXT SET CURSOR 1170 cd8611 call $1186 ;; undraw cursor, set cursor position and draw it 1173 cdd0bd call $bdd0 ; IND: TXT UNDRAW CURSOR ;; set cursor position and draw it 1176 2226b7 ld ($b726),hl 1179 c3cdbd jp $bdcd ; IND: TXT DRAW CURSOR ;;=========================================================================== ;; TXT GET CURSOR 117c 2a26b7 ld hl,($b726) 117f cd9311 call $1193 1182 3a2db7 ld a,($b72d) 1185 c9 ret ;;=========================================================================== 1186 3a29b7 ld a,($b729) 1189 3d dec a 118a 85 add a,l 118b 6f ld l,a 118c 3a2ab7 ld a,($b72a) 118f 3d dec a 1190 84 add a,h 1191 67 ld h,a 1192 c9 ret ;;==================================================================== 1193 3a29b7 ld a,($b729) 1196 95 sub l 1197 2f cpl 1198 3c inc a 1199 3c inc a 119a 6f ld l,a 119b 3a2ab7 ld a,($b72a) 119e 94 sub h 119f 2f cpl 11a0 3c inc a 11a1 3c inc a 11a2 67 ld h,a 11a3 c9 ret ;;==================================================================== 11a4 cdd0bd call $bdd0 ;; IND: TXT UNDRAW CURSOR ;;-------------------------------------------------------------------- 11a7 2a26b7 ld hl,($b726) 11aa cdd611 call $11d6 11ad 2226b7 ld ($b726),hl 11b0 d8 ret c 11b1 e5 push hl 11b2 212db7 ld hl,$b72d 11b5 78 ld a,b 11b6 87 add a,a 11b7 3c inc a 11b8 86 add a,(hl) 11b9 77 ld (hl),a 11ba cd5212 call $1252 ;; TXT GET WINDOW 11bd 3a30b7 ld a,($b730) 11c0 f5 push af 11c1 dc440e call c,$0e44 ;; SCR SW ROLL 11c4 f1 pop af 11c5 d4000e call nc,$0e00 ;; SCR HW ROLL 11c8 e1 pop hl 11c9 c9 ret ;;=========================================================================== ;; TXT VALIDATE 11ca cd8611 call $1186 11cd cdd611 call $11d6 11d0 f5 push af 11d1 cd9311 call $1193 11d4 f1 pop af 11d5 c9 ret ;;=========================================================================== 11d6 3a2cb7 ld a,($b72c) 11d9 bc cp h 11da f2e211 jp p,$11e2 11dd 3a2ab7 ld a,($b72a) 11e0 67 ld h,a 11e1 2c inc l 11e2 3a2ab7 ld a,($b72a) 11e5 3d dec a 11e6 bc cp h 11e7 faef11 jp m,$11ef 11ea 3a2cb7 ld a,($b72c) 11ed 67 ld h,a 11ee 2d dec l 11ef 3a29b7 ld a,($b729) 11f2 3d dec a 11f3 bd cp l 11f4 f20212 jp p,$1202 11f7 3a2bb7 ld a,($b72b) 11fa bd cp l 11fb 37 scf 11fc f0 ret p 11fd 6f ld l,a 11fe 06ff ld b,$ff 1200 b7 or a 1201 c9 ret ;;=========================================================================== 1202 3c inc a 1203 6f ld l,a 1204 0600 ld b,$00 1206 b7 or a 1207 c9 ret ;;=========================================================================== ;; TXT WIN ENABLE 1208 cd5d0b call $0b5d ;; SCR CHAR LIMITS 120b 7c ld a,h 120c cd4012 call $1240 120f 67 ld h,a 1210 7a ld a,d 1211 cd4012 call $1240 1214 57 ld d,a 1215 bc cp h 1216 3002 jr nc,$121a ; (+$02) 1218 54 ld d,h 1219 67 ld h,a 121a 7d ld a,l 121b cd4912 call $1249 121e 6f ld l,a 121f 7b ld a,e 1220 cd4912 call $1249 1223 5f ld e,a 1224 bd cp l 1225 3002 jr nc,$1229 ; (+$02) 1227 5d ld e,l 1228 6f ld l,a 1229 2229b7 ld ($b729),hl 122c ed532bb7 ld ($b72b),de 1230 7c ld a,h 1231 b5 or l 1232 2006 jr nz,$123a ; (+$06) 1234 7a ld a,d 1235 a8 xor b 1236 2002 jr nz,$123a ; (+$02) 1238 7b ld a,e 1239 a9 xor c 123a 3228b7 ld ($b728),a 123d c37311 jp $1173 ;; undraw cursor, set cursor position and draw it ;;=========================================================================== 1240 b7 or a 1241 f24512 jp p,$1245 1244 af xor a 1245 b8 cp b 1246 d8 ret c 1247 78 ld a,b 1248 c9 ret 1249 b7 or a 124a f24e12 jp p,$124e 124d af xor a 124e b9 cp c 124f d8 ret c 1250 79 ld a,c 1251 c9 ret ;;=========================================================================== ;; TXT GET WINDOW 1252 2a29b7 ld hl,($b729) 1255 ed5b2bb7 ld de,($b72b) 1259 3a28b7 ld a,($b728) 125c c6ff add a,$ff 125e c9 ret ;;=========================================================================== ;; IND: TXT UNDRAW CURSOR 125f 3a2eb7 ld a,($b72e) 1262 e603 and $03 1264 c0 ret nz ;;=========================================================================== ;; TXT PLACE CURSOR ;; TXT REMOVE CURSOR 1265 c5 push bc 1266 d5 push de 1267 e5 push hl 1268 cda711 call $11a7 126b ed4b2fb7 ld bc,($b72f) 126f cde50d call $0de5 ;; SCR CHAR INVERT 1272 e1 pop hl 1273 d1 pop de 1274 c1 pop bc 1275 c9 ret ;;=========================================================================== ;; TXT CUR ON 1276 f5 push af 1277 3efd ld a,$fd 1279 cd8812 call $1288 127c f1 pop af 127d c9 ret ;;=========================================================================== ;; TXT CUR OFF 127e f5 push af 127f 3e02 ld a,$02 1281 cd9912 call $1299 1284 f1 pop af 1285 c9 ret ;;=========================================================================== ;; TXT CUR ENABLE 1286 3efe ld a,$fe ;;--------------------------------------------------------------------------- 1288 f5 push af 1289 cdd0bd call $bdd0 ;; IND: TXT UNDRAW CURSOR 128c f1 pop af 128d e5 push hl 128e 212eb7 ld hl,$b72e 1291 a6 and (hl) 1292 77 ld (hl),a 1293 e1 pop hl 1294 c3cdbd jp $bdcd ;; IND: TXT DRAW CURSOR ;;=========================================================================== ;; TXT CUR DISABLE 1297 3e01 ld a,$01 ;;--------------------------------------------------------------------------- 1299 f5 push af 129a cdd0bd call $bdd0 ;; IND: TXT UNDRAW CURSOR 129d f1 pop af 129e e5 push hl 129f 212eb7 ld hl,$b72e 12a2 b6 or (hl) 12a3 77 ld (hl),a 12a4 e1 pop hl 12a5 c9 ret ;;=========================================================================== ;; TXT SET PEN 12a6 212fb7 ld hl,$b72f 12a9 1803 jr $12ae ; (+$03) ;;=========================================================================== ;; TXT SET PAPER 12ab 2130b7 ld hl,$b730 ;;--------------------------------------------------------------------------- 12ae f5 push af 12af cdd0bd call $bdd0 ;; IND: TXT UNDRAW CURSOR 12b2 f1 pop af 12b3 cd8e0c call $0c8e 12b6 77 ld (hl),a 12b7 c3cdbd jp $bdcd ;; IND: TXT DRAW CURSOR ;;=========================================================================== ;; TXT GET PEN 12ba 3a2fb7 ld a,($b72f) 12bd c3a70c jp $0ca7 ; SCR INK ENCODE ;;=========================================================================== ;; TXT GET PAPER 12c0 3a30b7 ld a,($b730) 12c3 c3a70c jp $0ca7 ; SCR INK ENCODE ;;=========================================================================== ;; TXT INVERSE 12c6 cdd0bd call $bdd0 ;; IND: TXT UNDRAW CURSOR 12c9 2a2fb7 ld hl,($b72f) 12cc 7c ld a,h 12cd 65 ld h,l 12ce 6f ld l,a 12cf 222fb7 ld ($b72f),hl 12d2 18e3 jr $12b7 ; (-$1d) ;;=========================================================================== ;; TXT GET MATRIX 12d4 d5 push de 12d5 5f ld e,a 12d6 cd2b13 call $132b ; TXT GET M TABLE 12d9 3009 jr nc,$12e4 ; get pointer to character graphics 12db 57 ld d,a 12dc 7b ld a,e 12dd 92 sub d 12de 3f ccf 12df 3003 jr nc,$12e4 ; get pointer to character graphics 12e1 5f ld e,a 12e2 1803 jr $12e7 ; (+$03) ;;------------------------------------------------------------------- ;; get pointer to graphics for character in font ;; ;; Entry conditions: ;; A = character code ;; Exit conditions: ;; HL = pointer to graphics for character 12e4 210038 ld hl,$3800 ; font graphics 12e7 f5 push af 12e8 1600 ld d,$00 12ea eb ex de,hl 12eb 29 add hl,hl ; x2 12ec 29 add hl,hl ; x4 12ed 29 add hl,hl ; x8 12ee 19 add hl,de 12ef f1 pop af 12f0 d1 pop de 12f1 c9 ret ;;=========================================================================== ;; TXT SET MATRIX 12f2 eb ex de,hl 12f3 cdd412 call $12d4 ; TXT GET MATRIX 12f6 d0 ret nc 12f7 eb ex de,hl ;;--------------------------------------------------------------------------- 12f8 010800 ld bc,$0008 12fb edb0 ldir 12fd c9 ret ;;=========================================================================== ;; TXT SET M TABLE 12fe e5 push hl 12ff 7a ld a,d 1300 b7 or a 1301 1600 ld d,$00 1303 2019 jr nz,$131e ; (+$19) 1305 15 dec d 1306 d5 push de 1307 4b ld c,e 1308 eb ex de,hl 1309 79 ld a,c 130a cdd412 call $12d4 ; TXT GET MATRIX 130d 7c ld a,h 130e aa xor d 130f 2004 jr nz,$1315 ; (+$04) 1311 7d ld a,l 1312 ab xor e 1313 2808 jr z,$131d ; (+$08) 1315 c5 push bc 1316 cdf812 call $12f8 1319 c1 pop bc 131a 0c inc c 131b 20ec jr nz,$1309 ; (-$14) 131d d1 pop de 131e cd2b13 call $132b ; TXT GET M TABLE 1321 ed5334b7 ld ($b734),de 1325 d1 pop de 1326 ed5336b7 ld ($b736),de 132a c9 ret ;;=========================================================================== ;; TXT GET M TABLE 132b 2a34b7 ld hl,($b734) 132e 7c ld a,h 132f 0f rrca 1330 7d ld a,l 1331 2a36b7 ld hl,($b736) 1334 c9 ret ;;=========================================================================== ;; TXT WR CHAR 1335 47 ld b,a 1336 3a2eb7 ld a,($b72e) 1339 07 rlca 133a d8 ret c 133b c5 push bc 133c cda411 call $11a4 133f 24 inc h 1340 2226b7 ld ($b726),hl 1343 25 dec h 1344 f1 pop af 1345 cdd3bd call $bdd3 ;; IND: TXT WRITE CURSOR 1348 c3cdbd jp $bdcd ;; IND: TXT DRAW CURSOR ;;=========================================================================== ;; IND: TXT WRITE CHAR 134b e5 push hl 134c cdd412 call $12d4 ; TXT GET MATRIX 134f 1138b7 ld de,$b738 1352 d5 push de 1353 cdf90e call $0ef9 ; SCR UNPACK 1356 d1 pop de 1357 e1 pop hl 1358 cd6a0b call $0b6a ; SCR CHAR POSITION 135b 0e08 ld c,$08 135d c5 push bc 135e e5 push hl 135f c5 push bc 1360 d5 push de 1361 eb ex de,hl 1362 4e ld c,(hl) 1363 cd7713 call $1377 1366 cd050c call $0c05 ; SCR NEXT LINE 1369 d1 pop de 136a 13 inc de 136b c1 pop bc 136c 10f1 djnz $135f ; (-$0f) 136e e1 pop hl 136f cd1f0c call $0c1f ; SCR NEXT LINE 1372 c1 pop bc 1373 0d dec c 1374 20e7 jr nz,$135d ; (-$19) 1376 c9 ret ;;=========================================================================== 1377 2a31b7 ld hl,($b731) 137a e9 jp (hl) ;;=========================================================================== ;; TXT SET BACK 137b 219213 ld hl,$1392 137e b7 or a 137f 2803 jr z,$1384 ; (+$03) 1381 21a013 ld hl,$13a0 1384 2231b7 ld ($b731),hl 1387 c9 ret ;;=========================================================================== ;; TXT GET BACK 1388 2a31b7 ld hl,($b731) 138b 116eec ld de,$ec6e 138e 19 add hl,de 138f 7c ld a,h 1390 b5 or l 1391 c9 ret ;;=========================================================================== 1392 2a2fb7 ld hl,($b72f) 1395 79 ld a,c 1396 2f cpl 1397 a4 and h 1398 47 ld b,a 1399 79 ld a,c 139a a5 and l 139b b0 or b 139c 0eff ld c,$ff 139e 1803 jr $13a3 ; (+$03) ;;=========================================================================== 13a0 3a2fb7 ld a,($b72f) ;;--------------------------------------------------------------------------- 13a3 47 ld b,a 13a4 eb ex de,hl 13a5 c3740c jp $0c74 ; SCR PIXELS ;;=========================================================================== ;; TXT SET GRAPHIC 13a8 3233b7 ld ($b733),a 13ab c9 ret ;;=========================================================================== ;; TXT RD CHAR 13ac e5 push hl 13ad d5 push de 13ae c5 push bc 13af cda411 call $11a4 13b2 cdd6bd call $bdd6 ; IND: TXT UNWRITE 13b5 f5 push af 13b6 cdcdbd call $bdcd ; IND: TXT DRAW CURSOR 13b9 f1 pop af 13ba c1 pop bc 13bb d1 pop de 13bc e1 pop hl 13bd c9 ret ;;=========================================================================== ;; IND: TXT UNWRITE 13be 3a30b7 ld a,($b730) 13c1 1138b7 ld de,$b738 13c4 e5 push hl 13c5 d5 push de 13c6 cd2a0f call $0f2a ; SCR REPACK 13c9 d1 pop de 13ca d5 push de 13cb 0608 ld b,$08 13cd 1a ld a,(de) 13ce 2f cpl 13cf 12 ld (de),a 13d0 13 inc de 13d1 10fa djnz $13cd ; (-$06) 13d3 cde113 call $13e1 13d6 d1 pop de 13d7 e1 pop hl 13d8 3001 jr nc,$13db ; (+$01) 13da c0 ret nz 13db 3a2fb7 ld a,($b72f) 13de cd2a0f call $0f2a ; SCR REPACK 13e1 0e00 ld c,$00 13e3 79 ld a,c 13e4 cdd412 call $12d4 ; TXT GET MATRIX 13e7 1138b7 ld de,$b738 13ea 0608 ld b,$08 13ec 1a ld a,(de) 13ed be cp (hl) 13ee 2009 jr nz,$13f9 ; (+$09) 13f0 23 inc hl 13f1 13 inc de 13f2 10f8 djnz $13ec ; (-$08) 13f4 79 ld a,c 13f5 fe8f cp $8f 13f7 37 scf 13f8 c9 ret 13f9 0c inc c 13fa 20e7 jr nz,$13e3 ; (-$19) 13fc af xor a 13fd c9 ret ;;=========================================================================== ;; TXT OUTPUT 13fe f5 push af 13ff c5 push bc 1400 d5 push de 1401 e5 push hl 1402 cdd9bd call $bdd9 ; IND: TXT OUT ACTION 1405 e1 pop hl 1406 d1 pop de 1407 c1 pop bc 1408 f1 pop af 1409 c9 ret ;;=========================================================================== ;; IND: TXT OUT ACTION 140a 4f ld c,a 140b 3a33b7 ld a,($b733) 140e b7 or a 140f 79 ld a,c 1410 c24019 jp nz,$1940 ; GRA WR CHAR 1413 2158b7 ld hl,$b758 1416 46 ld b,(hl) 1417 78 ld a,b 1418 fe0a cp $0a 141a 3031 jr nc,$144d ; (+$31) 141c b7 or a 141d 2006 jr nz,$1425 ; (+$06) 141f 79 ld a,c 1420 fe20 cp $20 1422 d23513 jp nc,$1335 ; TXT WR CHAR 1425 04 inc b 1426 70 ld (hl),b 1427 58 ld e,b 1428 1600 ld d,$00 142a 19 add hl,de 142b 71 ld (hl),c ;; b759 = control code character 142c 3a59b7 ld a,($b759) 142f 5f ld e,a ;; start of control code table in RAM ;; each entry is 3 bytes 1430 2163b7 ld hl,$b763 ;; this effectively multiplies E by 3 ;; and adds it onto the base address of the table 1433 19 add hl,de 1434 19 add hl,de 1435 19 add hl,de ;; 3 bytes per entry 1436 7e ld a,(hl) 1437 e60f and $0f 1439 b8 cp b 143a d0 ret nc 143b 3a2eb7 ld a,($b72e) 143e a6 and (hl) 143f 07 rlca 1440 380b jr c,$144d ; (+$0b) 1442 23 inc hl 1443 5e ld e,(hl) ;; function to execute 1444 23 inc hl 1445 56 ld d,(hl) 1446 2159b7 ld hl,$b759 1449 79 ld a,c 144a cd1600 call $0016 ; LOW: PCDE INSTRUCTION 144d af xor a 144e 3258b7 ld ($b758),a 1451 c9 ret ;;=========================================================================== ;; TXT VDU DISABLE 1452 3e81 ld a,$81 1454 cd9912 call $1299 1457 18f4 jr $144d ; (-$0c) ;;=========================================================================== ;; TXT VDU ENABLE 1459 3e7e ld a,$7e 145b cd8812 call $1288 145e 18ed jr $144d ; (-$13) ;;=========================================================================== ;; TXT ASK STATE 1460 3a2eb7 ld a,($b72e) 1463 c9 ret ;;=========================================================================== ;; initialise control code functions 1464 af xor a 1465 3258b7 ld ($b758),a 1468 217414 ld hl,$1474 146b 1163b7 ld de,$b763 146e 016000 ld bc,$0060 1471 edb0 ldir 1473 c9 ret ;;=========================================================================== ;; control code handler functions ;; (see SOFT968 for a description of the control character operations) ;; byte 0: bits 3..0: number of parameters expected ;; byte 1,2: handler function 1474 defb &80 defw &1513 ;; NUL: defb &81 defw &1335 ;; SOH: firmware function: TXT WR CHAR defb &80 defw &1297 ;; STX: firmware function: TXT CUR DISABLE defb &80 defw &1286 ;; ETX: firmware function: TXT CUR ENABLE defb &81 defw &0ae9 ;; EOT: firmware function: SCR SET MODE defb &81 defw &1940 ;; ENQ: firmware function: GRA WR CHAR defb &00 defw &1459 ;; ACK: firmware function: TXT VDU ENABLE defb &80 defw &14e1 ;; BEL: defb &80 defw &1519 ;; BS: defb &80 defw &151e ;; TAB: defb &80 defw &1523 ;; LF: defb &80 defw &1528 ;; VT: defb &80 defw &154f ;; FF: firmware function: TXT CLEAR WINDOW defb &80 defw &153f ;; CR: defb &81 defw &12ab ;; SO: firmware function: TXT SET PAPER defb &81 defw &12a6 ;; SI: firmware function: TXT SET PEN defb &80 defw &155e ;; DLE: defb &80 defw &1599 ;; DC1: defb &80 defw &158f ;; DC2: defb &80 defw &1578 ;; DC3: defb &80 defw &1565 ;; DC4: defb &80 defw &1452 ;; NAK: firmware function: TXT VDU DISABLE defb &81 defw &14ec ;; SYN: defb &81 defw &0c55 ;; ETB: firmware function: SCR ACCESS defb &80 defw &12c6 ;; CAN: firmware function: TXT INVERSE defb &89 defw &150d ;; EM: defb &84 defw &1501 ;; SUB: defb &00 defw &14eb ;; ESC defb &83 defw &14f1 ;; FS: defb &82 defw &14fa ;; GS: defb &80 defw &1539 ;; RS: defb &82 defw &1547 ;; US: ;; ============================================================================= ;; TXT GET CONTROLS 14d4 2163b7 ld hl,$b763 14d7 c9 ret ;; ============================================================================= ;; data for control character 'BEL' sound 14d8 defb &87,&00,&00,&5a,&00,&00,&0b,&14,&00 ;; ============================================================================= ;; performs control character 'BEL' function 14e1 dde5 push ix 14e3 21d814 ld hl,$14d8 14e6 cd1421 call $2114 ; SOUND QUEUE 14e9 dde1 pop ix ;; performs control character 'ESC' function 14eb c9 ret ;; ============================================================================= ;; performs control character 'SYN' function 14ec 0f rrca 14ed 9f sbc a,a 14ee c37b13 jp $137b ; TXT SET BACK ;; ============================================================================= ;; performs control character 'FS' function 14f1 23 inc hl 14f2 7e ld a,(hl) ; pen number 14f3 23 inc hl 14f4 46 ld b,(hl) ; ink 1 14f5 23 inc hl 14f6 4e ld c,(hl) ; ink 2 14f7 c3f20c jp $0cf2 ; SCR SET INK ;;==================================================================== ;; performs control character 'GS' instruction 14fa 23 inc hl 14fb 46 ld b,(hl) ; ink 1 14fc 23 inc hl 14fd 4e ld c,(hl) ; ink 2 14fe c3f70c jp $0cf7 ; SCR SET BORDER ;;==================================================================== ;; performs control character 'SUB' function 1501 23 inc hl 1502 56 ld d,(hl) ; left column 1503 23 inc hl 1504 7e ld a,(hl) ; right column 1505 23 inc hl 1506 5e ld e,(hl) ; top row 1507 23 inc hl 1508 6e ld l,(hl) ; bottom row 1509 67 ld h,a 150a c30812 jp $1208 ; TXT WIN ENABLE ;;==================================================================== ;; performs control character 'EM' function 150d 23 inc hl 150e 7e ld a,(hl) ; character index 150f 23 inc hl 1510 c3f212 jp $12f2 ; TXT SET MATRIX ;;==================================================================== ;; performs control character 'NUL' function 1513 cda411 call $11a4 1516 c3cdbd jp $bdcd ; IND: TXT DRAW CURSOR ;;==================================================================== ;; performs control character 'BS' function 1519 1100ff ld de,$ff00 151c 180d jr $152b ; (+$0d) ;;==================================================================== ;; performs control character 'TAB' function 151e 110001 ld de,$0100 1521 1808 jr $152b ; (+$08) ;;==================================================================== ;; performs control character 'LF' function 1523 110100 ld de,$0001 1526 1803 jr $152b ; (+$03) ;;==================================================================== ;; performs control character 'VT' function 1528 11ff00 ld de,$00ff ;;-------------------------------------------------------------------- ;; D = column adjustment ;; E = row adjustment 152b d5 push de 152c cda411 call $11a4 152f d1 pop de ;; adjust row 1530 7d ld a,l 1531 83 add a,e 1532 6f ld l,a ;; adjust column 1533 7c ld a,h 1534 82 add a,d 1535 67 ld h,a 1536 c37611 jp $1176 ; set cursor position and draw it ;;==================================================================== ;; performs control character 'RS' function 1539 2a29b7 ld hl,($b729) 153c c37311 jp $1173 ;; undraw cursor, set cursor position and draw it ;;=========================================================================== ;; performs control character 'CR' function 153f cda411 call $11a4 1542 3a2ab7 ld a,($b72a) 1545 18ee jr $1535 ; (-$12) ;;=========================================================================== ;; performs control character 'US' function 1547 23 inc hl 1548 56 ld d,(hl) ; column 1549 23 inc hl 154a 5e ld e,(hl) ; row 154b eb ex de,hl 154c c37011 jp $1170 ; TXT SET CURSOR ;;=========================================================================== ;; TXT CLEAR WINDOW 154f cdd0bd call $bdd0 ; IND: TXT UNDRAW CURSOR 1552 2a29b7 ld hl,($b729) 1555 2226b7 ld ($b726),hl 1558 ed5b2bb7 ld de,($b72b) 155c 1844 jr $15a2 ; (+$44) ;;=========================================================================== ;; performs control character 'DLE' function 155e cda411 call $11a4 1561 54 ld d,h 1562 5d ld e,l 1563 183d jr $15a2 ; (+$3d) ;;=========================================================================== ;; performs control character 'DC4' function 1565 cd8f15 call $158f ; control character 'DC2' 1568 2a29b7 ld hl,($b729) 156b ed5b2bb7 ld de,($b72b) 156f 3a26b7 ld a,($b726) 1572 6f ld l,a 1573 2c inc l 1574 bb cp e 1575 d0 ret nc 1576 1811 jr $1589 ; (+$11) ;;=========================================================================== ;; performs control character 'DC3' function 1578 cd9915 call $1599 ; control character 'DC1' function 157b 2a29b7 ld hl,($b729) 157e 3a2cb7 ld a,($b72c) 1581 57 ld d,a 1582 3a26b7 ld a,($b726) 1585 3d dec a 1586 5f ld e,a 1587 bd cp l 1588 d8 ret c 1589 3a30b7 ld a,($b730) 158c c3b90d jp $0db9 ; SCR FILL BOX ;;=========================================================================== ;; performs control character 'DC2' function 158f cda411 call $11a4 1592 5d ld e,l 1593 3a2cb7 ld a,($b72c) 1596 57 ld d,a 1597 1809 jr $15a2 ; (+$09) ;;=========================================================================== ;; performs control character 'DC1' function 1599 cda411 call $11a4 159c eb ex de,hl 159d 6b ld l,e 159e 3a2ab7 ld a,($b72a) 15a1 67 ld h,a ;;--------------------------------------------------------------------------- 15a2 cd8915 call $1589 15a5 c3cdbd jp $bdcd ; IND: TXT DRAW CURSOR ;;=========================================================================== ;; GRA INITIALISE 15a8 cdd715 call $15d7 ; GRA RESET 15ab 210100 ld hl,$0001 15ae 7c ld a,h 15af cd6e17 call $176e ; GRA SET PAPER 15b2 7d ld a,l 15b3 cd6717 call $1767 ; GRA SET PEN 15b6 210000 ld hl,$0000 15b9 54 ld d,h 15ba 5d ld e,l 15bb cd0e16 call $160e ; GRA SET ORIGIN 15be 110080 ld de,$8000 15c1 21ff7f ld hl,$7fff 15c4 e5 push hl 15c5 d5 push de 15c6 cda516 call $16a5 ; GRA WIN WIDTH 15c9 e1 pop hl 15ca d1 pop de 15cb c3ea16 jp $16ea ; GRA WIN HEIGHT ;;=========================================================================== 15ce cd7a17 call $177a ; GRA GET PAPER 15d1 67 ld h,a 15d2 cd7517 call $1775 ; GRA GET PEN 15d5 6f ld l,a 15d6 c9 ret ;;=========================================================================== ;; GRA RESET 15d7 cdf015 call $15f0 15da 21e015 ld hl,$15e0 ;; table used to initialise graphics pack indirections 15dd c3b40a jp $0ab4 ;; initialise graphics pack indirections 15e0 defb &09 defw &bddc jp $1786 ;; IND: GRA PLOT jp $179a ;; IND: GRA TEXT jp $17b4 ;; IND: GRA LINE ;;=========================================================================== ;; GRA DEFAULT 15ec af xor a 15ed cd550c call $0c55 ; SCR ACCESS 15f0 af xor a 15f1 cdd519 call $19d5 ; GRA SET BACK 15f4 2f cpl 15f5 cdb017 call $17b0 ; GRA SET FIRST 15f8 c3ac17 jp $17ac ; GRA SET LINE MASK ;;=========================================================================== ;; GRA MOVE RELATIVE 15fb cd5d16 call $165d ; convert relative graphics coordinate to ; absolute graphics coordinate ;;--------------------------------------------------------------------------- ;; GRA MOVE ABSOLUTE 15fe ed5397b6 ld ($b697),de 1602 2299b6 ld ($b699),hl 1605 c9 ret ;;=========================================================================== ;; GRA ASK CURSOR 1606 ed5b97b6 ld de,($b697) 160a 2a99b6 ld hl,($b699) 160d c9 ret ;;=========================================================================== ;; GRA SET ORIGIN 160e ed5393b6 ld ($b693),de 1612 2295b6 ld ($b695),hl ;;=========================================================================== ;; set graphics origin to bottom-left 1615 110000 ld de,$0000 1618 62 ld h,d 1619 6b ld l,e 161a 18e2 jr $15fe ; GRA MOVE ABSOLUTE ;;=========================================================================== ;; GRA GET ORIGIN 161c ed5b93b6 ld de,($b693) 1620 2a95b6 ld hl,($b695) 1623 c9 ret ;;=========================================================================== 1624 cd0616 call $1606 ; GRA ASK CURSOR 1627 cdfe15 call $15fe ; GRA MOVE ABSOLUTE ;;=========================================================================== ;; GRA FROM USER 162a e5 push hl 162b cd0c0b call $0b0c ; SCR GET MODE 162e ed44 neg 1630 defd sbc a,$fd 1632 2600 ld h,$00 1634 6f ld l,a 1635 cb7a bit 7,d 1637 2803 jr z,$163c ; (+$03) 1639 eb ex de,hl 163a 19 add hl,de 163b eb ex de,hl 163c 2f cpl 163d a3 and e 163e 5f ld e,a 163f 7d ld a,l 1640 2a93b6 ld hl,($b693) 1643 19 add hl,de 1644 0f rrca 1645 dce516 call c,$16e5 ; HL = HL/2 1648 0f rrca 1649 dce516 call c,$16e5 ; HL = HL/2 164c d1 pop de 164d e5 push hl 164e 7a ld a,d 164f 07 rlca 1650 3001 jr nc,$1653 ; (+$01) 1652 13 inc de 1653 cb83 res 0,e 1655 2a95b6 ld hl,($b695) 1658 19 add hl,de 1659 d1 pop de 165a c3e516 jp $16e5 ; HL = HL/2 ;;================================================================================== ;; convert relative graphics coordinate to absolute graphics coordinate 165d e5 push hl 165e 2a97b6 ld hl,($b697) 1661 19 add hl,de 1662 d1 pop de 1663 e5 push hl 1664 2a99b6 ld hl,($b699) 1667 19 add hl,de 1668 d1 pop de 1669 c9 ret ;;================================================================================== 166a 2a9bb6 ld hl,($b69b) 166d 37 scf 166e ed52 sbc hl,de 1670 f27e16 jp p,$167e 1673 2a9db6 ld hl,($b69d) 1676 b7 or a 1677 ed52 sbc hl,de 1679 37 scf 167a f0 ret p 167b f6ff or $ff 167d c9 ret 167e af xor a 167f c9 ret ;;================================================================================== 1680 2a9fb6 ld hl,($b69f) 1683 b7 or a 1684 ed52 sbc hl,de 1686 fa7b16 jp m,$167b 1689 2aa1b6 ld hl,($b6a1) 168c 37 scf 168d ed52 sbc hl,de 168f f27e16 jp p,$167e 1692 37 scf 1693 c9 ret ;;================================================================================== 1694 cd2716 call $1627 1697 e5 push hl 1698 cd6a16 call $166a 169b e1 pop hl 169c d0 ret nc 169d d5 push de 169e eb ex de,hl 169f cd8016 call $1680 16a2 eb ex de,hl 16a3 d1 pop de 16a4 c9 ret ;;================================================================================== ;; GRA WIN WIDTH 16a5 e5 push hl 16a6 cdd116 call $16d1 16a9 d1 pop de 16aa e5 push hl 16ab cdd116 call $16d1 16ae d1 pop de 16af 7b ld a,e 16b0 95 sub l 16b1 7a ld a,d 16b2 9c sbc a,h 16b3 3801 jr c,$16b6 ; (+$01) 16b5 eb ex de,hl 16b6 7b ld a,e 16b7 e6f8 and $f8 16b9 5f ld e,a 16ba 7d ld a,l 16bb f607 or $07 16bd 6f ld l,a 16be cd0c0b call $0b0c ; SCR GET MODE 16c1 3d dec a 16c2 fce116 call m,$16e1 16c5 3d dec a 16c6 fce116 call m,$16e1 16c9 ed539bb6 ld ($b69b),de 16cd 229db6 ld ($b69d),hl 16d0 c9 ret ;;================================================================================== 16d1 7a ld a,d 16d2 b7 or a 16d3 210000 ld hl,$0000 16d6 f8 ret m 16d7 217f02 ld hl,$027f 16da 7b ld a,e 16db 95 sub l 16dc 7a ld a,d 16dd 9c sbc a,h 16de d0 ret nc 16df eb ex de,hl 16e0 c9 ret ;;================================================================================== ;; DE = DE/2 ;; HL = HL/2 16e1 cb2a sra d 16e3 cb1b rr e ;;---------------------------------------------------------------------------------- ;; HL = HL/2 16e5 cb2c sra h 16e7 cb1d rr l 16e9 c9 ret ;;================================================================================== ;; GRA WIN HEIGHT 16ea e5 push hl 16eb cd0317 call $1703 16ee d1 pop de 16ef e5 push hl 16f0 cd0317 call $1703 16f3 d1 pop de 16f4 7d ld a,l 16f5 93 sub e 16f6 7c ld a,h 16f7 9a sbc a,d 16f8 3801 jr c,$16fb ; (+$01) 16fa eb ex de,hl 16fb ed539fb6 ld ($b69f),de 16ff 22a1b6 ld ($b6a1),hl 1702 c9 ret ;;================================================================================== 1703 7a ld a,d 1704 b7 or a 1705 210000 ld hl,$0000 1708 f8 ret m 1709 cb3a srl d 170b cb1b rr e 170d 21c700 ld hl,$00c7 1710 7b ld a,e 1711 95 sub l 1712 7a ld a,d 1713 9c sbc a,h 1714 d0 ret nc 1715 eb ex de,hl 1716 c9 ret ;;================================================================================== ;; GRA GET W WIDTH 1717 ed5b9bb6 ld de,($b69b) 171b 2a9db6 ld hl,($b69d) 171e cd0c0b call $0b0c ; SCR GET MODE 1721 3d dec a 1722 fc2717 call m,$1727 1725 3d dec a 1726 f0 ret p 1727 29 add hl,hl 1728 23 inc hl 1729 eb ex de,hl 172a 29 add hl,hl 172b eb ex de,hl 172c c9 ret ;;================================================================================== ;; GRA GET W HEIGHT 172d ed5b9fb6 ld de,($b69f) 1731 2aa1b6 ld hl,($b6a1) 1734 18f1 jr $1727 ; (-$0f) ;;================================================================================== ;; GRA CLEAR WINDOW 1736 cd1717 call $1717 ; GRA GET W WIDTH 1739 b7 or a 173a ed52 sbc hl,de 173c 23 inc hl 173d cde516 call $16e5 ; HL = HL/2 1740 cde516 call $16e5 ; HL = HL/2 1743 cb3d srl l 1745 45 ld b,l 1746 ed5ba1b6 ld de,($b6a1) 174a 2a9fb6 ld hl,($b69f) 174d e5 push hl 174e b7 or a 174f ed52 sbc hl,de 1751 23 inc hl 1752 4d ld c,l 1753 ed5b9bb6 ld de,($b69b) 1757 e1 pop hl 1758 c5 push bc 1759 cdaf0b call $0baf ;; SCR DOT POSITION 175c d1 pop de 175d 3aa4b6 ld a,($b6a4) 1760 4f ld c,a 1761 cdbd0d call $0dbd ;; SCR FLOOD BOX 1764 c31516 jp $1615 ;; set graphics origin to bottom left ;;================================================================================== ;; GRA SET PEN 1767 cd8e0c call $0c8e 176a 32a3b6 ld ($b6a3),a 176d c9 ret ;;================================================================================== ;; GRA SET PAPER 176e cd8e0c call $0c8e 1771 32a4b6 ld ($b6a4),a 1774 c9 ret ;;================================================================================== ;; GRA GET PEN 1775 3aa3b6 ld a,($b6a3) 1778 1803 jr $177d ; (+$03) ;;================================================================================== ;; GRA GET PAPER 177a 3aa4b6 ld a,($b6a4) 177d c3a70c jp $0ca7 ;; SCR INK ENCODE ;;================================================================================== ;; GRA PLOT RELATIVE 1780 cd5d16 call $165d ; convert relative graphics coordinate to ; absolute graphics coordinate ;;---------------------------------------------------------------------------------- ;; GRA PLOT ABSOLUTE 1783 c3dcbd jp $bddc ; IND: GRA PLOT ;;============================================================================ ;; IND: GRA PLOT 1786 cd9416 call $1694 1789 d0 ret nc 178a cdaf0b call $0baf ;; SCR DOT POSITION 178d 3aa3b6 ld a,($b6a3) 1790 47 ld b,a 1791 c3e8bd jp $bde8 ; IND: SCR WRITE ;;=========================================================================== ;; GRA TEST RELATIVE 1794 cd5d16 call $165d ; convert relative graphics coordinate to ; absolute graphics coordinate ;;--------------------------------------------------------------------------- ;; GRA TEST ABSOLUTE 1797 c3dfbd jp $bddf ; IND: GRA TEST ;;=========================================================================== ;; IND: GRA TEXT 179a cd9416 call $1694 179d d27a17 jp nc,$177a ; GRA GET PAPER 17a0 cdaf0b call $0baf ; SCR DOT POSITION 17a3 c3e5bd jp $bde5 ; IND: SCR READ ;;=========================================================================== ;; GRA LINE RELATIVE 17a6 cd5d16 call $165d ; convert relative graphics coordinate to ; absolute graphics coordinate ;;--------------------------------------------------------------------------- ;; GRA LINE ABSOLUTE 17a9 c3e2bd jp $bde2 ; IND: GRA LINE ;;=========================================================================== ;; GRA SET LINE MASK 17ac 32b3b6 ld ($b6b3),a 17af c9 ret ;;=========================================================================== ;; GRA SET FIRST 17b0 32b2b6 ld ($b6b2),a 17b3 c9 ret ;;=========================================================================== ;; IND: GRA LINE 17b4 e5 push hl 17b5 cd8b18 call $188b 17b8 e1 pop hl 17b9 cd2716 call $1627 17bc e5 push hl 17bd 2aa5b6 ld hl,($b6a5) 17c0 b7 or a 17c1 ed52 sbc hl,de 17c3 7c ld a,h 17c4 32adb6 ld ($b6ad),a 17c7 fc3919 call m,$1939 17ca d1 pop de 17cb e5 push hl 17cc 2aa7b6 ld hl,($b6a7) 17cf b7 or a 17d0 ed52 sbc hl,de 17d2 7c ld a,h 17d3 32aeb6 ld ($b6ae),a 17d6 fc3919 call m,$1939 17d9 d1 pop de 17da b7 or a 17db ed52 sbc hl,de 17dd 19 add hl,de 17de 9f sbc a,a 17df 32afb6 ld ($b6af),a 17e2 3aaeb6 ld a,($b6ae) 17e5 2804 jr z,$17eb ; (+$04) 17e7 eb ex de,hl 17e8 3aadb6 ld a,($b6ad) 17eb f5 push af 17ec ed53abb6 ld ($b6ab),de 17f0 44 ld b,h 17f1 4d ld c,l 17f2 3ab2b6 ld a,($b6b2) 17f5 b7 or a 17f6 2801 jr z,$17f9 ; (+$01) 17f8 03 inc bc 17f9 ed43b0b6 ld ($b6b0),bc 17fd cd3919 call $1939 1800 e5 push hl 1801 19 add hl,de 1802 22a9b6 ld ($b6a9),hl 1805 e1 pop hl 1806 cb2c sra h 1808 cb1d rr l 180a f1 pop af 180b 07 rlca 180c 3812 jr c,$1820 ; (+$12) 180e e5 push hl 180f cd8b18 call $188b 1812 2aadb6 ld hl,($b6ad) 1815 7c ld a,h 1816 2f cpl 1817 67 ld h,a 1818 7d ld a,l 1819 2f cpl 181a 6f ld l,a 181b 22adb6 ld ($b6ad),hl 181e 1812 jr $1832 ; (+$12) 1820 3ab2b6 ld a,($b6b2) 1823 b7 or a 1824 200d jr nz,$1833 ; (+$0d) 1826 19 add hl,de 1827 e5 push hl 1828 3aafb6 ld a,($b6af) 182b 07 rlca 182c dcda18 call c,$18da 182f d42819 call nc,$1928 1832 e1 pop hl 1833 7a ld a,d 1834 b3 or e 1835 ca9818 jp z,$1898 1838 dde5 push ix 183a 010000 ld bc,$0000 183d c5 push bc 183e dde1 pop ix 1840 dde5 push ix 1842 d1 pop de 1843 b7 or a 1844 ed5a adc hl,de 1846 ed5babb6 ld de,($b6ab) 184a f25318 jp p,$1853 184d 03 inc bc 184e dd19 add ix,de 1850 19 add hl,de 1851 30fa jr nc,$184d ; (-$06) 1853 af xor a 1854 93 sub e 1855 5f ld e,a 1856 9f sbc a,a 1857 92 sub d 1858 57 ld d,a 1859 19 add hl,de 185a 3005 jr nc,$1861 ; (+$05) 185c dd19 add ix,de 185e 0b dec bc 185f 18f8 jr $1859 ; (-$08) 1861 ed5ba9b6 ld de,($b6a9) 1865 19 add hl,de 1866 c5 push bc 1867 e5 push hl 1868 2ab0b6 ld hl,($b6b0) 186b b7 or a 186c ed42 sbc hl,bc 186e 3006 jr nc,$1876 ; (+$06) 1870 09 add hl,bc 1871 44 ld b,h 1872 4d ld c,l 1873 210000 ld hl,$0000 1876 22b0b6 ld ($b6b0),hl 1879 cd9818 call $1898 187c e1 pop hl 187d c1 pop bc 187e 3008 jr nc,$1888 ; (+$08) 1880 ed5bb0b6 ld de,($b6b0) 1884 7a ld a,d 1885 b3 or e 1886 20b8 jr nz,$1840 ; (-$48) 1888 dde1 pop ix 188a c9 ret ;;================================================================================== 188b d5 push de 188c cd2416 call $1624 188f ed53a5b6 ld ($b6a5),de 1893 22a7b6 ld ($b6a7),hl 1896 d1 pop de 1897 c9 ret ;;================================================================================== 1898 3aafb6 ld a,($b6af) 189b 07 rlca 189c 384d jr c,$18eb ; (+$4d) 189e 78 ld a,b 189f b1 or c 18a0 2838 jr z,$18da ; (+$38) 18a2 2aa7b6 ld hl,($b6a7) 18a5 09 add hl,bc 18a6 2b dec hl 18a7 44 ld b,h 18a8 4d ld c,l 18a9 eb ex de,hl 18aa cd8016 call $1680 18ad 2aa7b6 ld hl,($b6a7) 18b0 eb ex de,hl 18b1 23 inc hl 18b2 22a7b6 ld ($b6a7),hl 18b5 3806 jr c,$18bd ; (+$06) 18b7 2821 jr z,$18da ; (+$21) 18b9 ed4b9fb6 ld bc,($b69f) 18bd cd8016 call $1680 18c0 3805 jr c,$18c7 ; (+$05) 18c2 c0 ret nz 18c3 ed5ba1b6 ld de,($b6a1) 18c7 d5 push de 18c8 ed5ba5b6 ld de,($b6a5) 18cc cd6a16 call $166a 18cf e1 pop hl 18d0 3805 jr c,$18d7 ; (+$05) 18d2 21adb6 ld hl,$b6ad 18d5 ae xor (hl) 18d6 f0 ret p 18d7 dc1610 call c,$1016 18da 2aa5b6 ld hl,($b6a5) 18dd 3aadb6 ld a,($b6ad) 18e0 07 rlca 18e1 23 inc hl 18e2 3802 jr c,$18e6 ; (+$02) 18e4 2b dec hl 18e5 2b dec hl 18e6 22a5b6 ld ($b6a5),hl 18e9 37 scf 18ea c9 ret 18eb 78 ld a,b 18ec b1 or c 18ed 2839 jr z,$1928 ; (+$39) 18ef 2aa5b6 ld hl,($b6a5) 18f2 09 add hl,bc 18f3 2b dec hl 18f4 44 ld b,h 18f5 4d ld c,l 18f6 eb ex de,hl 18f7 cd6a16 call $166a 18fa 2aa5b6 ld hl,($b6a5) 18fd eb ex de,hl 18fe 23 inc hl 18ff 22a5b6 ld ($b6a5),hl 1902 3806 jr c,$190a ; (+$06) 1904 2822 jr z,$1928 ; (+$22) 1906 ed4b9db6 ld bc,($b69d) 190a cd6a16 call $166a 190d 3805 jr c,$1914 ; (+$05) 190f c0 ret nz 1910 ed5b9bb6 ld de,($b69b) 1914 d5 push de 1915 ed5ba7b6 ld de,($b6a7) 1919 cd8016 call $1680 191c e1 pop hl 191d 3805 jr c,$1924 ; (+$05) 191f 21aeb6 ld hl,$b6ae 1922 ae xor (hl) 1923 f0 ret p 1924 eb ex de,hl 1925 dcc20f call c,$0fc2 1928 2aa7b6 ld hl,($b6a7) 192b 3aaeb6 ld a,($b6ae) 192e 07 rlca 192f 23 inc hl 1930 3802 jr c,$1934 ; (+$02) 1932 2b dec hl 1933 2b dec hl 1934 22a7b6 ld ($b6a7),hl 1937 37 scf 1938 c9 ret ;;================================================================================== 1939 af xor a 193a 95 sub l 193b 6f ld l,a 193c 9f sbc a,a 193d 94 sub h 193e 67 ld h,a 193f c9 ret ;;=========================================================================== ;; GRA WR CHAR 1940 dde5 push ix 1942 cdd412 call $12d4 ; TXT GET MATRIX 1945 e5 push hl 1946 dde1 pop ix 1948 cd2416 call $1624 194b cd9716 call $1697 194e 304b jr nc,$199b ; (+$4b) 1950 e5 push hl 1951 d5 push de 1952 010700 ld bc,$0007 1955 eb ex de,hl 1956 09 add hl,bc 1957 eb ex de,hl 1958 b7 or a 1959 ed42 sbc hl,bc 195b cd9716 call $1697 195e d1 pop de 195f e1 pop hl 1960 3039 jr nc,$199b ; (+$39) 1962 cdaf0b call $0baf ;; SCR DOT POSITION 1965 1608 ld d,$08 1967 e5 push hl 1968 dd5e00 ld e,(ix+$00) 196b 37 scf 196c cb13 rl e 196e cdc419 call $19c4 1971 cb09 rrc c 1973 dc050c call c,$0c05 ; SCR NEXT LINE 1976 cb23 sla e 1978 20f4 jr nz,$196e ; (-$0c) 197a e1 pop hl 197b cd1f0c call $0c1f ; SCR NEXT LINE 197e dd23 inc ix 1980 15 dec d 1981 20e4 jr nz,$1967 ; (-$1c) 1983 dde1 pop ix 1985 cd0616 call $1606 ; GRA ASK CURSOR 1988 eb ex de,hl 1989 cd0c0b call $0b0c ; SCR GET MODE 198c 010800 ld bc,$0008 198f 2804 jr z,$1995 ; (+$04) 1991 3003 jr nc,$1996 ; (+$03) 1993 09 add hl,bc 1994 09 add hl,bc 1995 09 add hl,bc 1996 09 add hl,bc 1997 eb ex de,hl 1998 c3fe15 jp $15fe ; GRA MOVE ABSOLUTE ;;================================================================================== 199b 0608 ld b,$08 199d c5 push bc 199e d5 push de 199f dd7e00 ld a,(ix+$00) 19a2 37 scf 19a3 8f adc a,a 19a4 e5 push hl 19a5 d5 push de 19a6 f5 push af 19a7 cd9716 call $1697 19aa 3008 jr nc,$19b4 ; (+$08) 19ac cdaf0b call $0baf ;; SCR DOT POSITION 19af f1 pop af 19b0 f5 push af 19b1 cdc419 call $19c4 19b4 f1 pop af 19b5 d1 pop de 19b6 e1 pop hl 19b7 13 inc de 19b8 87 add a,a 19b9 20e9 jr nz,$19a4 ; (-$17) 19bb d1 pop de 19bc 2b dec hl 19bd dd23 inc ix 19bf c1 pop bc 19c0 10db djnz $199d ; (-$25) 19c2 18bf jr $1983 ; (-$41) ;;================================================================================== 19c4 3aa3b6 ld a,($b6a3) 19c7 3808 jr c,$19d1 ; (+$08) 19c9 3ab4b6 ld a,($b6b4) 19cc b7 or a 19cd c0 ret nz 19ce 3aa4b6 ld a,($b6a4) 19d1 47 ld b,a 19d2 c3e8bd jp $bde8 ; IND: SCR WRITE ;;=========================================================================== ;; GRA SET BACK 19d5 32b4b6 ld ($b6b4),a 19d8 c9 ret ;;=========================================================================== ;; GRA FILL 19d9 22a5b6 ld ($b6a5),hl 19dc 3601 ld (hl),$01 19de 1b dec de 19df ed53a7b6 ld ($b6a7),de 19e3 cd8e0c call $0c8e 19e6 32aab6 ld ($b6aa),a 19e9 cd2416 call $1624 19ec cd9716 call $1697 19ef dc421b call c,$1b42 19f2 d0 ret nc 19f3 e5 push hl 19f4 cde71a call $1ae7 19f7 e3 ex (sp),hl 19f8 cd151b call $1b15 19fb c1 pop bc 19fc 3eff ld a,$ff 19fe 32a9b6 ld ($b6a9),a 1a01 e5 push hl 1a02 d5 push de 1a03 c5 push bc 1a04 cd0b1a call $1a0b 1a07 c1 pop bc 1a08 d1 pop de 1a09 e1 pop hl 1a0a af xor a 1a0b 32abb6 ld ($b6ab),a 1a0e cdde1a call $1ade 1a11 cd9716 call $1697 1a14 dc501a call c,$1a50 1a17 38f5 jr c,$1a0e ; (-$0b) 1a19 2aa5b6 ld hl,($b6a5) 1a1c e7 rst $20 ; RST 4 - LOW: RAM LAM 1a1d fe01 cp $01 1a1f 282a jr z,$1a4b ; (+$2a) 1a21 32abb6 ld ($b6ab),a 1a24 eb ex de,hl 1a25 2aa7b6 ld hl,($b6a7) 1a28 010700 ld bc,$0007 1a2b 09 add hl,bc 1a2c 22a7b6 ld ($b6a7),hl 1a2f eb ex de,hl 1a30 2b dec hl 1a31 e7 rst $20 ; RST 4 - LOW: RAM LAM 1a32 47 ld b,a 1a33 2b dec hl 1a34 e7 rst $20 ; RST 4 - LOW: RAM LAM 1a35 4f ld c,a 1a36 2b dec hl 1a37 e7 rst $20 ; RST 4 - LOW: RAM LAM 1a38 57 ld d,a 1a39 2b dec hl 1a3a e7 rst $20 ; RST 4 - LOW: RAM LAM 1a3b 5f ld e,a 1a3c d5 push de 1a3d 2b dec hl 1a3e e7 rst $20 ; RST 4 - LOW: RAM LAM 1a3f 57 ld d,a 1a40 2b dec hl 1a41 e7 rst $20 ; RST 4 - LOW: RAM LAM 1a42 5f ld e,a 1a43 2b dec hl 1a44 22a5b6 ld ($b6a5),hl 1a47 eb ex de,hl 1a48 d1 pop de 1a49 18c6 jr $1a11 ; (-$3a) 1a4b 3aa9b6 ld a,($b6a9) 1a4e 0f rrca 1a4f c9 ret ;;================================================================================== 1a50 ed43acb6 ld ($b6ac),bc 1a54 cd421b call $1b42 1a57 3809 jr c,$1a62 ; (+$09) 1a59 cdf11a call $1af1 1a5c d0 ret nc 1a5d 22aeb6 ld ($b6ae),hl 1a60 1811 jr $1a73 ; (+$11) 1a62 e5 push hl 1a63 cd151b call $1b15 1a66 22aeb6 ld ($b6ae),hl 1a69 c1 pop bc 1a6a 7d ld a,l 1a6b 91 sub c 1a6c 7c ld a,h 1a6d 98 sbc a,b 1a6e dccb1a call c,$1acb 1a71 60 ld h,b 1a72 69 ld l,c 1a73 cde71a call $1ae7 1a76 22b0b6 ld ($b6b0),hl 1a79 ed4bacb6 ld bc,($b6ac) 1a7d b7 or a 1a7e ed42 sbc hl,bc 1a80 09 add hl,bc 1a81 2811 jr z,$1a94 ; (+$11) 1a83 3008 jr nc,$1a8d ; (+$08) 1a85 cdf11a call $1af1 1a88 dc9d1a call c,$1a9d 1a8b 1807 jr $1a94 ; (+$07) 1a8d e5 push hl 1a8e 60 ld h,b 1a8f 69 ld l,c 1a90 c1 pop bc 1a91 cdcb1a call $1acb 1a94 2aaeb6 ld hl,($b6ae) 1a97 ed4bb0b6 ld bc,($b6b0) 1a9b 37 scf 1a9c c9 ret 1a9d d5 push de 1a9e e5 push hl 1a9f 2aa7b6 ld hl,($b6a7) 1aa2 11f9ff ld de,$fff9 1aa5 19 add hl,de 1aa6 d1 pop de 1aa7 301c jr nc,$1ac5 ; (+$1c) 1aa9 22a7b6 ld ($b6a7),hl 1aac 2aa5b6 ld hl,($b6a5) 1aaf 23 inc hl 1ab0 73 ld (hl),e 1ab1 23 inc hl 1ab2 72 ld (hl),d 1ab3 23 inc hl 1ab4 d1 pop de 1ab5 73 ld (hl),e 1ab6 23 inc hl 1ab7 72 ld (hl),d 1ab8 23 inc hl 1ab9 71 ld (hl),c 1aba 23 inc hl 1abb 70 ld (hl),b 1abc 23 inc hl 1abd 3aabb6 ld a,($b6ab) 1ac0 77 ld (hl),a 1ac1 22a5b6 ld ($b6a5),hl 1ac4 c9 ret 1ac5 af xor a 1ac6 32a9b6 ld ($b6a9),a 1ac9 d1 pop de 1aca c9 ret 1acb cdd71a call $1ad7 1ace cd421b call $1b42 1ad1 d4f11a call nc,$1af1 1ad4 dc9d1a call c,$1a9d 1ad7 3aabb6 ld a,($b6ab) 1ada 2f cpl 1adb 32abb6 ld ($b6ab),a 1ade 1b dec de 1adf 3aabb6 ld a,($b6ab) 1ae2 b7 or a 1ae3 c8 ret z 1ae4 13 inc de 1ae5 13 inc de 1ae6 c9 ret 1ae7 af xor a 1ae8 ed4b9fb6 ld bc,($b69f) 1aec cdf31a call $1af3 1aef 2b dec hl 1af0 c9 ret ;;================================================================================== 1af1 3eff ld a,$ff 1af3 c5 push bc 1af4 d5 push de 1af5 e5 push hl 1af6 f5 push af 1af7 cd4f1b call $1b4f 1afa f1 pop af 1afb 47 ld b,a 1afc cd341b call $1b34 1aff 04 inc b 1b00 1004 djnz $1b06 ; (+$04) 1b02 3047 jr nc,$1b4b ; (+$47) 1b04 ae xor (hl) 1b05 77 ld (hl),a 1b06 3843 jr c,$1b4b ; (+$43) 1b08 e3 ex (sp),hl 1b09 23 inc hl 1b0a e3 ex (sp),hl 1b0b ed52 sbc hl,de 1b0d 283c jr z,$1b4b ; (+$3c) 1b0f 19 add hl,de 1b10 cd390c call $0c39 ; SCR PREV LINE 1b13 18e7 jr $1afc ; (-$19) 1b15 c5 push bc 1b16 d5 push de 1b17 e5 push hl 1b18 ed4ba1b6 ld bc,($b6a1) 1b1c cd4f1b call $1b4f 1b1f b7 or a 1b20 ed52 sbc hl,de 1b22 2827 jr z,$1b4b ; (+$27) 1b24 19 add hl,de 1b25 cd1f0c call $0c1f ; SCR NEXT LINE 1b28 cd341b call $1b34 1b2b 281e jr z,$1b4b ; (+$1e) 1b2d ae xor (hl) 1b2e 77 ld (hl),a 1b2f e3 ex (sp),hl 1b30 2b dec hl 1b31 e3 ex (sp),hl 1b32 18eb jr $1b1f ; (-$15) ;;================================================================================== 1b34 3aa3b6 ld a,($b6a3) 1b37 ae xor (hl) 1b38 a1 and c 1b39 c8 ret z 1b3a 3aaab6 ld a,($b6aa) 1b3d ae xor (hl) 1b3e a1 and c 1b3f c8 ret z 1b40 37 scf 1b41 c9 ret ;;================================================================================== 1b42 c5 push bc 1b43 d5 push de 1b44 e5 push hl 1b45 cdaf0b call $0baf ;; SCR DOT POSITION 1b48 cd341b call $1b34 1b4b e1 pop hl 1b4c d1 pop de 1b4d c1 pop bc 1b4e c9 ret ;;================================================================================== 1b4f c5 push bc 1b50 d5 push de 1b51 cdaf0b call $0baf ;; SCR DOT POSITION 1b54 d1 pop de 1b55 e3 ex (sp),hl 1b56 cdaf0b call $0baf ;; SCR DOT POSITION 1b59 eb ex de,hl 1b5a e1 pop hl 1b5b c9 ret ;;=========================================================================== ;; KM INITIALISE 1b5c 21021e ld hl,$1e02 1b5f cdf61d call $1df6 ; KM SET DELAY 1b62 af xor a 1b63 3255b6 ld ($b655),a 1b66 67 ld h,a 1b67 6f ld l,a 1b68 2231b6 ld ($b631),hl 1b6b 01b0ff ld bc,$ffb0 1b6e 11d6b5 ld de,$b5d6 1b71 2192b6 ld hl,$b692 1b74 3e04 ld a,$04 1b76 eb ex de,hl 1b77 09 add hl,bc 1b78 eb ex de,hl 1b79 72 ld (hl),d 1b7a 2b dec hl 1b7b 73 ld (hl),e 1b7c 2b dec hl 1b7d 3d dec a 1b7e 20f6 jr nz,$1b76 ; (-$0a) ;;------------------------------------------- ;; copy keyboard translation table 1b80 21ef1e ld hl,$1eef 1b83 01fa00 ld bc,$00fa 1b86 edb0 ldir ;;------------------------------------------- 1b88 060a ld b,$0a 1b8a 1135b6 ld de,$b635 1b8d 213fb6 ld hl,$b63f 1b90 af xor a 1b91 12 ld (de),a 1b92 13 inc de 1b93 36ff ld (hl),$ff 1b95 23 inc hl 1b96 10f9 djnz $1b91 ; (-$07) ;;------------------------------------------- ;;=========================================================================== ;; KM RESET 1b98 cd751e call $1e75 1b9b cdf81b call $1bf8 1b9e 1190b5 ld de,$b590 1ba1 219800 ld hl,$0098 1ba4 cd0a1c call $1c0a 1ba7 21b31b ld hl,$1bb3 ; table used to initialise keyboard manager indirections 1baa cdb40a call $0ab4 ; initialise keyboard manager indirections 1bad cdb40a call $0ab4 ; initialise keyboard manager indirections 1bb0 c30b1e jp $1e0b ; KM DISARM BREAK 1bb3: defb &3 defw &bdee ; IND: KM TEST BREAK jp $1db8 defb &3 defw &bdf4 ; IND: KM SCAN KEYS jp $1d40 ;;=========================================================================== ;; KM WAIT CHAR 1bbf cdc51b call $1bc5 ; KM READ CHAR 1bc2 30fb jr nc,$1bbf 1bc4 c9 ret ;;=========================================================================== ;; KM READ CHAR 1bc5 e5 push hl 1bc6 212ab6 ld hl,$b62a 1bc9 7e ld a,(hl) 1bca 36ff ld (hl),$ff 1bcc be cp (hl) 1bcd 3827 jr c,$1bf6 ; (+$27) 1bcf 2a28b6 ld hl,($b628) 1bd2 7c ld a,h 1bd3 b7 or a 1bd4 2011 jr nz,$1be7 ; (+$11) 1bd6 cde11c call $1ce1 ; KM READ KEY 1bd9 301b jr nc,$1bf6 ; (+$1b) 1bdb fe80 cp $80 1bdd 3817 jr c,$1bf6 ; (+$17) 1bdf fea0 cp $a0 1be1 3f ccf 1be2 3812 jr c,$1bf6 ; (+$12) 1be4 67 ld h,a 1be5 2e00 ld l,$00 1be7 d5 push de 1be8 cdb31c call $1cb3 ; KM GET EXPAND 1beb 3802 jr c,$1bef ; (+$02) 1bed 2600 ld h,$00 1bef 2c inc l 1bf0 2228b6 ld ($b628),hl 1bf3 d1 pop de 1bf4 30e0 jr nc,$1bd6 ; (-$20) 1bf6 e1 pop hl 1bf7 c9 ret 1bf8 3eff ld a,$ff ;;=========================================================================== ;; KM CHAR RETURN 1bfa 322ab6 ld ($b62a),a 1bfd c9 ret ;;=========================================================================== ;; KM FLUSH 1bfe cdc51b call $1bc5 ; KM READ CHAR 1c01 38fb jr c,$1bfe 1c03 c9 ret ;;=========================================================================== ;; KM EXP BUFFER 1c04 cd0a1c call $1c0a 1c07 3f ccf 1c08 fb ei 1c09 c9 ret 1c0a f3 di 1c0b 7d ld a,l 1c0c d631 sub $31 1c0e 7c ld a,h 1c0f de00 sbc a,$00 1c11 d8 ret c 1c12 19 add hl,de 1c13 222db6 ld ($b62d),hl 1c16 eb ex de,hl 1c17 222bb6 ld ($b62b),hl 1c1a 01300a ld bc,$0a30 1c1d 3601 ld (hl),$01 1c1f 23 inc hl 1c20 71 ld (hl),c 1c21 23 inc hl 1c22 0c inc c 1c23 10f8 djnz $1c1d ; (-$08) 1c25 eb ex de,hl 1c26 213c1c ld hl,$1c3c 1c29 0e0a ld c,$0a 1c2b edb0 ldir 1c2d eb ex de,hl 1c2e 0613 ld b,$13 1c30 af xor a 1c31 77 ld (hl),a 1c32 23 inc hl 1c33 10fc djnz $1c31 ; (-$04) 1c35 222fb6 ld ($b62f),hl 1c38 3229b6 ld ($b629),a 1c3b c9 ret 1c3c 012e01 ld bc,$012e 1c3f 0d dec c 1c40 05 dec b 1c41 52 ld d,d 1c42 55 ld d,l 1c43 4e ld c,(hl) 1c44 220d78 ld ($780d),hl 1c47 cdc31c call $1cc3 1c4a d0 ret nc 1c4b c5 push bc 1c4c d5 push de 1c4d e5 push hl 1c4e cd6a1c call $1c6a 1c51 3f ccf 1c52 e1 pop hl 1c53 d1 pop de 1c54 c1 pop bc 1c55 d0 ret nc 1c56 1b dec de 1c57 79 ld a,c 1c58 0c inc c 1c59 12 ld (de),a 1c5a 13 inc de 1c5b e7 rst $20 ; RST 4 - LOW: RAM LAM 1c5c 23 inc hl 1c5d 0d dec c 1c5e 20f9 jr nz,$1c59 ; (-$07) 1c60 2129b6 ld hl,$b629 1c63 78 ld a,b 1c64 ae xor (hl) 1c65 2001 jr nz,$1c68 ; (+$01) 1c67 77 ld (hl),a 1c68 37 scf 1c69 c9 ret ;;=========================================================================== 1c6a 0600 ld b,$00 1c6c 60 ld h,b 1c6d 6f ld l,a 1c6e 79 ld a,c 1c6f 95 sub l 1c70 c8 ret z 1c71 300f jr nc,$1c82 ; (+$0f) 1c73 7d ld a,l 1c74 69 ld l,c 1c75 4f ld c,a 1c76 19 add hl,de 1c77 eb ex de,hl 1c78 09 add hl,bc 1c79 cda71c call $1ca7 1c7c 2823 jr z,$1ca1 ; (+$23) 1c7e edb0 ldir 1c80 181f jr $1ca1 ; (+$1f) 1c82 4f ld c,a 1c83 19 add hl,de 1c84 e5 push hl 1c85 2a2fb6 ld hl,($b62f) 1c88 09 add hl,bc 1c89 eb ex de,hl 1c8a 2a2db6 ld hl,($b62d) 1c8d 7d ld a,l 1c8e 93 sub e 1c8f 7c ld a,h 1c90 9a sbc a,d 1c91 e1 pop hl 1c92 d8 ret c 1c93 cda71c call $1ca7 1c96 2a2fb6 ld hl,($b62f) 1c99 2806 jr z,$1ca1 ; (+$06) 1c9b d5 push de 1c9c 1b dec de 1c9d 2b dec hl 1c9e edb8 lddr 1ca0 d1 pop de 1ca1 ed532fb6 ld ($b62f),de 1ca5 b7 or a 1ca6 c9 ret ;;=========================================================================== 1ca7 3a2fb6 ld a,($b62f) 1caa 95 sub l 1cab 4f ld c,a 1cac 3a30b6 ld a,($b630) 1caf 9c sbc a,h 1cb0 47 ld b,a 1cb1 b1 or c 1cb2 c9 ret ;;=========================================================================== ;; KM GET EXPAND 1cb3 cdc31c call $1cc3 1cb6 d0 ret nc 1cb7 bd cp l 1cb8 c8 ret z 1cb9 3f ccf 1cba d0 ret nc 1cbb e5 push hl 1cbc 2600 ld h,$00 1cbe 19 add hl,de 1cbf 7e ld a,(hl) 1cc0 e1 pop hl 1cc1 37 scf 1cc2 c9 ret ;;=========================================================================== 1cc3 e67f and $7f 1cc5 fe20 cp $20 1cc7 d0 ret nc 1cc8 e5 push hl 1cc9 2a2bb6 ld hl,($b62b) 1ccc 110000 ld de,$0000 1ccf 3c inc a 1cd0 19 add hl,de 1cd1 5e ld e,(hl) 1cd2 23 inc hl 1cd3 3d dec a 1cd4 20fa jr nz,$1cd0 ; (-$06) 1cd6 7b ld a,e 1cd7 eb ex de,hl 1cd8 e1 pop hl 1cd9 37 scf 1cda c9 ret ;;=========================================================================== ;; KM WAIT KEY 1cdb cde11c call $1ce1 ; KM READ KEY 1cde 30fb jr nc,$1cdb 1ce0 c9 ret ;;=========================================================================== ;; KM READ KEY 1ce1 e5 push hl 1ce2 c5 push bc 1ce3 cd9d1e call $1e9d 1ce6 303a jr nc,$1d22 ; (+$3a) 1ce8 79 ld a,c 1ce9 feef cp $ef 1ceb 2834 jr z,$1d21 ; (+$34) 1ced e60f and $0f 1cef 87 add a,a 1cf0 87 add a,a 1cf1 87 add a,a 1cf2 3d dec a 1cf3 3c inc a 1cf4 cb08 rrc b 1cf6 30fb jr nc,$1cf3 ; (-$05) 1cf8 cd251d call $1d25 1cfb 2132b6 ld hl,$b632 1cfe cb7e bit 7,(hl) 1d00 280a jr z,$1d0c ; (+$0a) 1d02 fe61 cp $61 1d04 3806 jr c,$1d0c ; (+$06) 1d06 fe7b cp $7b 1d08 3002 jr nc,$1d0c ; (+$02) 1d0a c6e0 add a,$e0 1d0c feff cp $ff 1d0e 28d3 jr z,$1ce3 ; (-$2d) 1d10 fefe cp $fe 1d12 2131b6 ld hl,$b631 1d15 2805 jr z,$1d1c ; (+$05) 1d17 fefd cp $fd 1d19 23 inc hl 1d1a 2005 jr nz,$1d21 ; (+$05) 1d1c 7e ld a,(hl) 1d1d 2f cpl 1d1e 77 ld (hl),a 1d1f 18c2 jr $1ce3 ; (-$3e) 1d21 37 scf 1d22 c1 pop bc 1d23 e1 pop hl 1d24 c9 ret ;;=========================================================================== 1d25 cb11 rl c 1d27 dace1e jp c,$1ece ; KM GET CONTROL 1d2a 47 ld b,a 1d2b 3a31b6 ld a,($b631) 1d2e b1 or c 1d2f e640 and $40 1d31 78 ld a,b 1d32 c2c91e jp nz,$1ec9 ; KM GET SHIFT 1d35 c3c41e jp $1ec4 ; KM GET TRANSLATE ;;=========================================================================== ;; KM GET STATE 1d38 2a31b6 ld hl,($b631) 1d3b c9 ret ;;=========================================================================== ;; KM SET LOCKS 1d3c 2231b6 ld ($b631),hl 1d3f c9 ret ;;=========================================================================== ;; IND: KM SCAN KEYS 1d40 1149b6 ld de,$b649 ; buffer for keys that have changed 1d43 213fb6 ld hl,$b63f ; buffer for current state of key matrix ; if a bit is '0' then key is pressed, ; if a bit is '1' then key is released. 1d46 cd8308 call $0883 ; scan keyboard ;;b635-b63e ;;b63f-b648 ;;b649-b652 (keyboard line 0-10 inclusive) 1d49 3a4bb6 ld a,($b64b) ; keyboard line 2 1d4c e6a0 and $a0 ; isolate change state of CTRL and SHIFT keys 1d4e 4f ld c,a 1d4f 2137b6 ld hl,$b637 1d52 b6 or (hl) 1d53 77 ld (hl),a ;;---------------------------------------------------------------------- 1d54 2149b6 ld hl,$b649 1d57 1135b6 ld de,$b635 1d5a 0600 ld b,$00 1d5c 1a ld a,(de) 1d5d ae xor (hl) 1d5e a6 and (hl) 1d5f c4d11d call nz,$1dd1 1d62 7e ld a,(hl) 1d63 12 ld (de),a 1d64 23 inc hl 1d65 13 inc de 1d66 0c inc c 1d67 79 ld a,c 1d68 e60f and $0f 1d6a fe0a cp $0a 1d6c 20ee jr nz,$1d5c ; (-$12) ;;--------------------------------------------------------------------- 1d6e 79 ld a,c 1d6f e6a0 and $a0 1d71 cb71 bit 6,c 1d73 4f ld c,a 1d74 c4eebd call nz,$bdee ; IND: KM TEST BREAK 1d77 78 ld a,b 1d78 b7 or a 1d79 c0 ret nz 1d7a 2153b6 ld hl,$b653 1d7d 35 dec (hl) 1d7e c0 ret nz 1d7f 2a54b6 ld hl,($b654) 1d82 eb ex de,hl 1d83 42 ld b,d 1d84 1600 ld d,$00 1d86 2135b6 ld hl,$b635 1d89 19 add hl,de 1d8a 7e ld a,(hl) 1d8b 2a91b6 ld hl,($b691) 1d8e 19 add hl,de 1d8f a6 and (hl) 1d90 a0 and b 1d91 c8 ret z 1d92 2153b6 ld hl,$b653 1d95 34 inc (hl) 1d96 3a8ab6 ld a,($b68a) 1d99 b7 or a 1d9a c0 ret nz 1d9b 79 ld a,c 1d9c b3 or e 1d9d 4f ld c,a 1d9e 3a33b6 ld a,($b633) 1da1 3253b6 ld ($b653),a 1da4 cd861e call $1e86 1da7 79 ld a,c 1da8 e60f and $0f 1daa 6f ld l,a 1dab 60 ld h,b 1dac 2254b6 ld ($b654),hl 1daf fe08 cp $08 1db1 c0 ret nz 1db2 cb60 bit 4,b 1db4 c0 ret nz 1db5 cbf1 set 6,c 1db7 c9 ret ;;===================================================================================== ;; IND: KM TEST BREAK 1db8 213db6 ld hl,$b63d 1dbb cb56 bit 2,(hl) 1dbd c8 ret z 1dbe 79 ld a,c 1dbf eea0 xor $a0 1dc1 2056 jr nz,$1e19 ; KM BREAK EVENT 1dc3 c5 push bc 1dc4 23 inc hl 1dc5 060a ld b,$0a 1dc7 8e adc a,(hl) 1dc8 2b dec hl 1dc9 10fc djnz $1dc7 ; (-$04) 1dcb c1 pop bc 1dcc fea4 cp $a4 1dce 2049 jr nz,$1e19 ; KM BREAK EVENT ;; do reset 1dd0 c7 rst $00 ;;==================================================================== 1dd1 e5 push hl 1dd2 d5 push de 1dd3 5f ld e,a 1dd4 2f cpl 1dd5 3c inc a 1dd6 a3 and e 1dd7 47 ld b,a 1dd8 3a34b6 ld a,($b634) 1ddb cda11d call $1da1 1dde 78 ld a,b 1ddf ab xor e 1de0 20f1 jr nz,$1dd3 ; (-$0f) 1de2 d1 pop de 1de3 e1 pop hl 1de4 c9 ret ;;=========================================================================== ;; KM GET JOYSTICK 1de5 3a3bb6 ld a,($b63b) 1de8 e67f and $7f 1dea 6f ld l,a 1deb 3a3eb6 ld a,($b63e) 1dee e67f and $7f 1df0 67 ld h,a 1df1 c9 ret ;;=========================================================================== ;; KM GET DELAY 1df2 2a33b6 ld hl,($b633) 1df5 c9 ret ;;=========================================================================== ;; KM SET DELAY 1df6 2233b6 ld ($b633),hl 1df9 c9 ret ;;=========================================================================== ;; KM ARM BREAK 1dfa cd0b1e call $1e0b ; KM DISARM BREAK 1dfd 2157b6 ld hl,$b657 1e00 0640 ld b,$40 1e02 cdd201 call $01d2 ; KL INIT EVENT 1e05 3eff ld a,$ff 1e07 3256b6 ld ($b656),a 1e0a c9 ret ;;=========================================================================== ;; KM DISARM BREAK 1e0b c5 push bc 1e0c d5 push de 1e0d 2156b6 ld hl,$b656 1e10 3600 ld (hl),$00 1e12 23 inc hl 1e13 cd8402 call $0284 ; KL DEL SYNCHRONOUS 1e16 d1 pop de 1e17 c1 pop bc 1e18 c9 ret ;;=========================================================================== ;; KM BREAK EVENT 1e19 2156b6 ld hl,$b656 1e1c 7e ld a,(hl) 1e1d 3600 ld (hl),$00 1e1f be cp (hl) 1e20 c8 ret z 1e21 c5 push bc 1e22 d5 push de 1e23 23 inc hl 1e24 cde201 call $01e2 ; KL EVENT 1e27 0eef ld c,$ef 1e29 cd861e call $1e86 1e2c d1 pop de 1e2d c1 pop bc 1e2e c9 ret ;;=========================================================================== ;; KM GET REPEAT 1e2f 2a91b6 ld hl,($b691) 1e32 181c jr $1e50 ; (+$1c) ;;=========================================================================== ;; KM SET REPEAT 1e34 fe50 cp $50 1e36 d0 ret nc 1e37 2a91b6 ld hl,($b691) 1e3a cd551e call $1e55 1e3d 2f cpl 1e3e 4f ld c,a 1e3f 7e ld a,(hl) 1e40 a8 xor b 1e41 a1 and c 1e42 a8 xor b 1e43 77 ld (hl),a 1e44 c9 ret ;;=========================================================================== ;; KM TEST KEY 1e45 f5 push af 1e46 3a37b6 ld a,($b637) 1e49 e6a0 and $a0 1e4b 4f ld c,a 1e4c f1 pop af 1e4d 2135b6 ld hl,$b635 1e50 cd551e call $1e55 1e53 a6 and (hl) 1e54 c9 ret ;;=========================================================================== 1e55 d5 push de 1e56 f5 push af 1e57 e6f8 and $f8 1e59 0f rrca 1e5a 0f rrca 1e5b 0f rrca 1e5c 5f ld e,a 1e5d 1600 ld d,$00 1e5f 19 add hl,de 1e60 f1 pop af 1e61 e5 push hl 1e62 216d1e ld hl,$1e6d 1e65 e607 and $07 1e67 5f ld e,a 1e68 19 add hl,de 1e69 7e ld a,(hl) 1e6a e1 pop hl 1e6b d1 pop de 1e6c c9 ret ;;=========================================================================== ;; table to convert from bit index (0-7) to bit OR mask (1<0: error) 271a b7 or a 271b 211ab1 ld hl,$b11a 271e 2858 jr z,$2778 ; ;; A = error code 2720 0685 ld b,$85 ; "Read error" 2722 cd8528 call $2885 ; display message with code ;; .. retry 2725 1894 jr $26bb ;;=========================================================================== 2727 f5 push af 2728 0688 ld b,$88 ; "Found " 272a cd0428 call $2804 ; "Found xxx block x" 272d f1 pop af 272e 308b jr nc,$26bb ; (-$75) 2730 0687 ld b,$87 ; "Rewind tape" 2732 cd8328 call $2883 2735 1884 jr $26bb ; (-$7c) ;;======================================================================== ;; compare filenames ;; ;; if not first block: ;; compare names ;; if first block: ;; - compare filenames if a filename was specified ;; - copy loaded header into ram 2737 3a36b1 ld a,($b136) ; first block flag in internal header? 273a b7 or a 273b 281b jr z,$2758 273d 3abbb1 ld a,($b1bb) ; first block flag in loaded header? 2740 2f cpl 2741 b7 or a 2742 c0 ret nz ;; if user specified a filename, compare it against the filename in the loaded ;; header, otherwise accept the file 2743 3a1fb1 ld a,($b11f) ; did user specify a filename? ; e.g. LOAD"bob 2746 b7 or a 2747 c46027 call nz,$2760 ; compare filenames and block number 274a c0 ret nz ; if filenames do not match, quit ;; gets here if: ;; 1. if a filename was specified by user and filename matches with ;; filename in loaded header ;; ;; 2. no filename was specified by user ;; copy loaded header to in-memory header 274b 21a4b1 ld hl,$b1a4 274e 111fb1 ld de,$b11f 2751 014000 ld bc,$0040 2754 edb0 ldir 2756 af xor a 2757 c9 ret ;;========================================================================= ;; compare name and block number 2758 cd6027 call $2760 ; compare filenames 275b c0 ret nz ;; compare block number 275c eb ex de,hl 275d 1a ld a,(de) 275e be cp (hl) 275f c9 ret ;;============================================================================ ;; compare two filenames; one filename is in the loaded header ;; the second filename is in the in-memory header ;; ;; nz = filenames are different ;; z = filenames are identical 2760 211fb1 ld hl,$b11f ; in-memory header 2763 11a4b1 ld de,$b1a4 ; loaded header ;; compare filenames 2766 0610 ld b,$10 ; 16 characters 2768 1a ld a,(de) ; get character from loaded header 2769 cd2629 call $2926 ; convert character to upper case 276c 4f ld c,a 276d 7e ld a,(hl) ; get character from in-memory header 276e cd2629 call $2926 ; convert character to upper case 2771 a9 xor c ; result will be 0 if the characters are identical. ; will be <>0 if the characters are different 2772 c0 ret nz ; quit if characters are not the same 2773 23 inc hl ; increment pointer 2774 13 inc de ; increment pointer 2775 10f1 djnz $2768 ;; if control gets to here, then the filenames are identical 2777 c9 ret ;;============================================================================ 2778 7e ld a,(hl) 2779 3603 ld (hl),$03 ; 277b cd6d25 call $256d 277e b7 or a ;;---------------------------------------------------------------------------- ;; quit loading block 277f 9f sbc a,a 2780 f5 push af 2781 cdbf2b call $2bbf ; CAS STOP MOTOR 2784 f1 pop af 2785 c9 ret ;;============================================================================ ;; write a block 2786 010284 ld bc,$8402 2789 cde527 call $27e5 278c 304a jr nc,$27d8 ; (+$4a) 278e 068a ld b,$8a 2790 1164b1 ld de,$b164 2793 cd0728 call $2807 2796 217bb1 ld hl,$b17b 2799 cdfa27 call $27fa 279c 303a jr nc,$27d8 ; (+$3a) 279e 2a60b1 ld hl,($b160) 27a1 2262b1 ld ($b162),hl 27a4 2279b1 ld ($b179),hl 27a7 e5 push hl ;; write header for this block 27a8 2164b1 ld hl,$b164 27ab 114000 ld de,$0040 27ae 3e2c ld a,$2c ; header marker 27b0 cdaf29 call $29af ; cas write: write header 27b3 e1 pop hl 27b4 3022 jr nc,$27d8 ; (+$22) ;; write data for this block 27b6 ed5b77b1 ld de,($b177) 27ba 3e16 ld a,$16 ; data marker 27bc cdaf29 call $29af ; cas write: write data block 27bf 2175b1 ld hl,$b175 27c2 dcfa27 call c,$27fa 27c5 3011 jr nc,$27d8 ; (+$11) 27c7 210000 ld hl,$0000 27ca 2277b1 ld ($b177),hl 27cd 2174b1 ld hl,$b174 27d0 34 inc (hl) 27d1 af xor a 27d2 327bb1 ld ($b17b),a 27d5 37 scf 27d6 18a7 jr $277f ; (-$59) ;;======================================================================= ;; A = code (A=0: no error; A<>0: error) 27d8 b7 or a 27d9 215fb1 ld hl,$b15f 27dc 289a jr z,$2778 ; (-$66) ;; a = code 27de 0686 ld b,$86 ; "Write error" 27e0 cd8528 call $2885 ; display message with code 27e3 18b9 jr $279e ; (-$47) ;;======================================================================== ;; ;; exit: ;; A = 0: no error ;; A <>0: error 27e5 21e4b1 ld hl,$b1e4 27e8 79 ld a,c 27e9 be cp (hl) 27ea 71 ld (hl),c 27eb 37 scf 27ec e5 push hl 27ed c5 push bc 27ee c4d228 call nz,$28d2 27f1 c1 pop bc 27f2 e1 pop hl 27f3 9f sbc a,a 27f4 d0 ret nc 27f5 cdbb2b call $2bbb ; CAS START MOTOR 27f8 9f sbc a,a 27f9 c9 ret ;;======================================================================== 27fa 7e ld a,(hl) 27fb b7 or a 27fc 37 scf 27fd c8 ret z 27fe 012c01 ld bc,$012c ; delay in 1/100ths of a second 2801 c3e22b jp $2be2 ; delay for 3 seconds ;;=================================================================================== 2804 11a4b1 ld de,$b1a4 2807 3a18b1 ld a,($b118) ; cassette messages enabled? 280a b7 or a 280b c0 ret nz 280c 3219b1 ld ($b119),a 280f cdf328 call $28f3 2812 cd9828 call $2898 ; display message 2815 1a ld a,(de) ; is first character of filename = 0? 2816 b7 or a 2817 200a jr nz,$2823 ; ;; unnamed file 2819 3e8e ld a,$8e ; "Unnamed file" 281b cd9928 call $2899 ; display message 281e 011000 ld bc,$0010 2821 182e jr $2851 ; (+$2e) ;;----------------------------- ;; named file 2823 cd2f29 call $292f 2826 010010 ld bc,$1000 2829 280d jr z,$2838 ; (+$0d) 282b 6b ld l,e 282c 62 ld h,d 282d 7e ld a,(hl) 282e b7 or a 282f 2804 jr z,$2835 ; (+$04) 2831 0c inc c 2832 23 inc hl 2833 10f8 djnz $282d ; (-$08) 2835 78 ld a,b 2836 41 ld b,c 2837 4f ld c,a 2838 cdfd28 call $28fd ; insert new-line if word ; can't fit onto current-line 283b 1a ld a,(de) ; get character from filename 283c cd2629 call $2926 ; convert character to upper case 283f b7 or a ; zero? 2840 2002 jr nz,$2844 ;; display a space if a zero is found 2842 3e20 ld a,$20 ; display a space 2844 c5 push bc 2845 d5 push de 2846 cd3513 call $1335 ; TXT WR CHAR 2849 d1 pop de 284a c1 pop bc 284b 13 inc de 284c 10ed djnz $283b ; (-$13) 284e cdce28 call $28ce ; display space 2851 eb ex de,hl 2852 09 add hl,bc 2853 eb ex de,hl 2854 3e8d ld a,$8d ; "block " 2856 cd9928 call $2899 ; display message 2859 0602 ld b,$02 ; length of word 285b cdfd28 call $28fd ; insert new-line if word ; can't fit onto current-line 285e 1a ld a,(de) 285f cd1429 call $2914 ; display decimal number 2862 cdce28 call $28ce ; display space 2865 13 inc de 2866 cd2f29 call $292f 2869 200b jr nz,$2876 ; (+$0b) 286b 13 inc de 286c 1a ld a,(de) 286d e60f and $0f 286f c624 add a,$24 2871 cdf028 call $28f0 2874 1858 jr $28ce ; display space ;;========================================================================= 2876 1a ld a,(de) 2877 2119b1 ld hl,$b119 287a b6 or (hl) 287b c8 ret z 287c 186d jr $28eb ; (+$6d) ;;========================================================================= ;; A = message code 287e cd9928 call $2899 ; display message 2881 1868 jr $28eb ; (+$68) ;;========================================================================= 2883 3eff ld a,$ff ;; display message with code on end (e.g. "Read error x" or "Write error x" ;; A = code (1,2,3) 2885 f5 push af 2886 cd9128 call $2891 2889 f1 pop af 288a c660 add a,$60 ; 'a'-1 288c d4f028 call nc,$28f0 ; display character 288f 185a jr $28eb ;;========================================================================= 2891 cd7c11 call $117c ; TXT GET CURSOR 2894 25 dec h 2895 c4eb28 call nz,$28eb 2898 78 ld a,b ;;========================================================================= ;; display message ;; ;; - message is displayed using word-wrap ;; ;; a = message number (&80-&FF) 2899 e5 push hl 289a e67f and $7f ; get message index (0-127) 289c 47 ld b,a 289d 213529 ld hl,$2935 ; start of message list (points to first message) ;; first message in list? (message 0?) 28a0 2807 jr z,$28a9 ;; not first. ;; ;; - each message is terminated by a zero byte ;; - keep fetching bytes until a zero is found. ;; - if a zero is found, decrement count. If count reaches zero, then ;; the first byte following the zero, is the start of the message we want 28a2 7e ld a,(hl) ; get byte 28a3 23 inc hl ; increment pointer 28a4 b7 or a ; is it zero (0) ? 28a5 20fb jr nz,$28a2 ; if zero, it is the end of this string ;; got a zero byte, so at end of the current string 28a7 10f9 djnz $28a2 ; decrement message count ;; HL = start of message to display ;; this part is looped; message may contain multiple strings ;; end of message? 28a9 7e ld a,(hl) 28aa b7 or a 28ab 2805 jr z,$28b2 ; (+$05) ;; display message 28ad cdb528 call $28b5 ; display message with word-wrap ;; at this point there might be a end of string marker (0), the start ;; of another string (next byte will have bit 7=0) or a continuation string ;; (next byte will have bit 7=1) 28b0 18f7 jr $28a9 ; continue displaying string ;; finished displaying complete string , or displayed part of string sequence 28b2 e1 pop hl 28b3 23 inc hl ; if part of a complete message, go to next sub-string or word 28b4 c9 ret ;;========================================================================= ;; display message with word wrap ;; HL = address of message ;; A = first character in message ;; if -ve, then bit 7 is set. Bit 6..0 define the ID of the message to display ;; if +ve, then this is the first character in the message 28b5 fa9928 jp m,$2899 ;;------------------------------------- ;; count number of letters in word 28b8 e5 push hl ;; store start of word ;; count number of letters in world 28b9 0600 ld b,$00 28bb 04 inc b 28bc 7e ld a,(hl) ;; get character 28bd 23 inc hl ;; increment pointer 28be 07 rlca ;; if bit 7 is set, then this is the last character of the current word 28bf 30fa jr nc,$28bb ;; B = number of letters ;; if word will not fit onto end of current line, insert ;; a line break, and display on next line 28c1 cdfd28 call $28fd 28c4 e1 pop hl ;; restore start of word ;;------------------------------------ ;; display word ;; HL = location of characters ;; B = number of characters 28c5 7e ld a,(hl) ; get byte 28c6 23 inc hl ; increment counter 28c7 e67f and $7f ; isolate byte 28c9 cdf028 call $28f0 ; display char (txt output?) 28cc 10f7 djnz $28c5 ;; display space 28ce 3e20 ld a,$20 ; " " (space) character 28d0 181e jr $28f0 ; display character ;;========================================================================= 28d2 3a18b1 ld a,($b118) ; cassette messages enabled? 28d5 b7 or a 28d6 37 scf 28d7 c0 ret nz 28d8 cd9128 call $2891 ; display message 28db cdfe1b call $1bfe ; KM FLUSH 28de cd7612 call $1276 ; TXT CUR ON 28e1 cddb1c call $1cdb ; KM WAIT KEY 28e4 cd7e12 call $127e ; TXT CUR OFF 28e7 fefc cp $fc 28e9 c8 ret z 28ea 37 scf ;;----------------------------------------------------------------------- 28eb cdf328 call $28f3 ;; display cr 28ee 3e0a ld a,$0a 28f0 c3fe13 jp $13fe ; TXT OUTPUT ;;========================================================================== 28f3 f5 push af 28f4 e5 push hl 28f5 3e01 ld a,$01 28f7 cd5a11 call $115a ; TXT SET COLUMN 28fa e1 pop hl 28fb f1 pop af 28fc c9 ret ;;========================================================================== ;; determine if word can be displayed on this line 28fd d5 push de 28fe cd5212 call $1252 ; TXT GET WINDOW 2901 5c ld e,h 2902 cd7c11 call $117c ; TXT GET CURSOR 2905 7c ld a,h 2906 3d dec a 2907 83 add a,e 2908 80 add a,b 2909 3d dec a 290a ba cp d 290b d1 pop de 290c d8 ret c 290d 3eff ld a,$ff 290f 3219b1 ld ($b119),a 2912 18d7 jr $28eb ; (-$29) ;;============================================================================ ;; divide by 10 2914 06ff ld b,$ff 2916 04 inc b 2917 d60a sub $0a 2919 30fb jr nc,$2916 ; (-$05) ;; B = result of division by 10 ;; A = <10 291b c63a add a,$3a ; convert to ASCII digit 291d f5 push af 291e 78 ld a,b 291f b7 or a 2920 c41429 call nz,$2914 ; continue with division 2923 f1 pop af 2924 18ca jr $28f0 ; display character ;;============================================================================ ;; convert character to upper case 2926 fe61 cp $61 ; "a" 2928 d8 ret c 2929 fe7b cp $7b ; "z" 292b d0 ret nc 292c c6e0 add a,$e0 292e c9 ret ;;============================================================================ ;; test if read function is CATALOG ;; ;; zero set = catalog ;; zero clear = not catalog 292f 3a1ab1 ld a,($b11a) ; get current read function 2932 fe04 cp $04 ; catalog function? 2934 c9 ret ;;============================================================================ ;; cassette messages ;; - a zero (0) byte indicates end of complete message ;; - a byte with bit 7 set indicates: ;; end of a word, the id of another continuing string ;; 0: "Press" ;; 1: "PLAY then any key:" ;; 2: "error" ;; 3: "Press PLAY then any key:" ;; 4: "Press REC and PLAY then any key:" ;; 5: "Read error" ;; 6: "Write error" ;; 7: "Rewind tape" ;; 8: "Found " ;; 9: "Loading" ;; 10: "Saving" ;; 11: ;; 12: "Ok" ;; 13: "block" ;; 14: "Unnamed file" defb "Pres","s"+&80,0 defb "PLA","Y"+&80,"the","n"+&80,"an","y"+&80,"key",":"+&80,0 defb "erro","r"+&80,0 defb 0+&80,1+&80,0 defb &80,"RE","C"+&80,"an","d"+&80,&81,defb 0 defb "Rea","d"+&80,&82 defb "Writ","e"+&80,&82 defb "Rewin","d"+&80,"tap","e"+&80,0 defb "Found "," "+&80,0 defb "Loadin","g"+&80,0 defb "Savin","g"+&80,0 defb 0 defb "O","k"+&80,0 defb "bloc","k"+&80,0 defb "Unname"d"+&80,"file "," "+&80,0 ;;========================================================================= ;; CAS READ ;; A = sync byte ;; HL = location of data ;; DE = length of data 29a6 cde329 call $29e3 ; enable key checking and start the cassette motor 29a9 f5 push af 29aa 21282a ld hl,$2a28 ; read block of data 29ad 1819 jr $29c8 ; do read ;;========================================================================= ;; CAS WRITE ;; A = sync byte ;; HL = destination location for data ;; DE = length of data 29af cde329 call $29e3 ; enable key checking and start the cassette motor 29b2 f5 push af 29b3 cdd42a call $2ad4 ;; write start of block (pilot and syncs) 29b6 21672a ld hl,$2a67 ;; write block of data 29b9 dc0d2a call c,$2a0d ;; read/write 256 byte blocks 29bc dce92a call c,$2ae9 ;; write trailer 29bf 180f jr $29d0 ;; ;;========================================================================= ;; CAS CHECK 29c1 cde329 call $29e3 ; enable key checking and start the cassette motor 29c4 f5 push af 29c5 21372a ld hl,$2a37 ;; check stored block with block in memory ;;------------------------------------------------------ ;; do read ;; cas check or cas read 29c8 e5 push hl 29c9 cd892a call $2a89 ;; read pilot and sync 29cc e1 pop hl 29cd dc0d2a call c,$2a0d ;; read/write 256 byte blocks ;;---------------------------------------------------------------- ;; cas check, cas read or cas write 29d0 d1 pop de 29d1 f5 push af 29d2 0182f7 ld bc,$f782 ;; set PPI port A to output 29d5 ed49 out (c),c 29d7 0110f6 ld bc,$f610 ;; cassette motor on 29da ed49 out (c),c ;; if cassette motor is stopped, then it will stop immediatly ;; if cassette motor is running, then there will not be any pause. 29dc fb ei ;; enable interrupts 29dd 7a ld a,d 29de cdc12b call $2bc1 ;; CAS RESTORE MOTOR 29e1 f1 pop af 29e2 c9 ret ;;========================================================================= ;; enable key checking and start the cassette motor ;; store marker 29e3 32e5b1 ld ($b1e5),a 29e6 1b dec de 29e7 1c inc e 29e8 e5 push hl 29e9 d5 push de 29ea cde91f call $1fe9 ; SOUND RESET 29ed d1 pop de 29ee dde1 pop ix 29f0 cdbb2b call $2bbb ; CAS START MOTOR 29f3 f3 di ;; disable interrupts ;; select PSG register 14 (PSG port A) ;; (keyboard data is connected to PSG port A) 29f4 010ef4 ld bc,$f40e ;; select keyboard line 14 29f7 ed49 out (c),c 29f9 01d0f6 ld bc,$f6d0 ;; cassette motor on + PSG select register operation 29fc ed49 out (c),c 29fe 0e10 ld c,$10 2a00 ed49 out (c),c ;; cassette motor on + PSG inactive operation 2a02 0192f7 ld bc,$f792 ;; set PPI port A to input 2a05 ed49 out (c),c ;; PSG port A data can be read through PPI port A now 2a07 0158f6 ld bc,$f658 ;; cassette motor on + PSG read data operation + select keyboard line 8 2a0a ed49 out (c),c 2a0c c9 ret ;;======================================================================================== ;; read/write blocks ;; DE = number of bytes to read/write ;; D = number of 256 blocks to read/write ;; if D = 0, then there is a single block to write, which has E bytes ;; in it. ;; if D!=0, then there is more than one block to write, write 256 bytes ;; for each block except the last. Then write final block with remaining ;; bytes. 2a0d 7a ld a,d 2a0e b7 or a 2a0f 280d jr z,$2a1e ; (+$0d) ;; do each complete 256 byte block 2a11 e5 push hl 2a12 d5 push de 2a13 1e00 ld e,$00 ; number of bytes 2a15 cd1e2a call $2a1e ; read/write block 2a18 d1 pop de 2a19 e1 pop hl 2a1a d0 ret nc 2a1b 15 dec d 2a1c 20f3 jr nz,$2a11 ; (-$0d) ;; E = number of bytes in last block to write ;;------------------------------------ ;; initialise crc 2a1e 01ffff ld bc,$ffff 2a21 ed43ebb1 ld ($b1eb),bc ; crc ;; do function 2a25 1601 ld d,$01 2a27 e9 jp (hl) ;;======================================================================================== ;; IX = address to load data to ;; read data ;; input: ;; D = block size ;; E = actual data size ;; output: ;; D = bytes remaining in block (block size - actual data size) 2a28 cd202b call $2b20 ; read byte from cassette 2a2b d0 ret nc 2a2c dd7700 ld (ix+$00),a ; store byte 2a2f dd23 inc ix ; increment pointer 2a31 15 dec d ; decrement block count 2a32 1d dec e 2a33 20f3 jr nz,$2a28 ; decrement actual data count ;; D = number of bytes remaining in block ;; read remaining bytes in block; but ignore 2a35 1812 jr $2a49 ; (+$12) ;;======================================================================================== ;; check stored block with block in memory 2a37 cd202b call $2b20 ; read byte from cassette 2a3a d0 ret nc 2a3b 47 ld b,a 2a3c cdd7ba call $bad7 ; get byte from IX with roms disabled 2a3f a8 xor b 2a40 3e03 ld a,$03 ; 2a42 c0 ret nz 2a43 dd23 inc ix 2a45 15 dec d 2a46 1d dec e 2a47 20ee jr nz,$2a37 ; (-$12) ;; any more bytes remaining in block?? 2a49 15 dec d 2a4a 2806 jr z,$2a52 ; ;; bytes remaining ;; read the remaining bytes but ignore 2a4c cd202b call $2b20 ; read byte from cassette 2a4f d0 ret nc 2a50 18f7 jr $2a49 ; ;;----------------------------------------------------- 2a52 cd162b call $2b16 ; get 1's complemented crc 2a55 cd202b call $2b20 ; read crc byte1 from cassette 2a58 d0 ret nc 2a59 aa xor d 2a5a 2007 jr nz,$2a63 ; 2a5c cd202b call $2b20 ; read crc byte2 from cassette 2a5f d0 ret nc 2a60 ab xor e 2a61 37 scf 2a62 c8 ret z 2a63 3e02 ld a,$02 2a65 b7 or a 2a66 c9 ret ;;======================================================================================== ;; write block of data (pad with 0's if less than block size) ;; IX = address of data ;; E = actual byte count ;; D = block size count 2a67 cdd7ba call $bad7 ; get byte from IX with roms disabled 2a6a cd682b call $2b68 ; write data byte 2a6d d0 ret nc 2a6e dd23 inc ix ; increment pointer 2a70 15 dec d ; decrement block size count 2a71 1d dec e ; decrement actual count 2a72 20f3 jr nz,$2a67 ; (-$0d) ;; actual byte count = block size count? 2a74 15 dec d 2a75 2807 jr z,$2a7e ;; no, actual byte count was less than block size ;; pad up to block size with zeros 2a77 af xor a 2a78 cd682b call $2b68 ; write data byte 2a7b d0 ret nc 2a7c 18f6 jr $2a74 ; (-$0a) ;; get 1's complemented crc 2a7e cd162b call $2b16 ;; write crc 1 2a81 cd682b call $2b68 ; write data byte 2a84 d0 ret nc ;; write crc 2 2a85 7b ld a,e 2a86 c3682b jp $2b68 ; write data byte ;;======================================================================================== ;; read pilot and sync 2a89 d5 push de 2a8a cd932a call $2a93 ; read pilot and sync 2a8d d1 pop de 2a8e d8 ret c 2a8f b7 or a 2a90 c8 ret z 2a91 18f6 jr $2a89 ; (-$0a) ;;========================================================================== ;; read pilot and sync ;;--------------------------------- ;; wait for start of leader/pilot 2a93 2e55 ld l,$55 ; %01010101 ; this is used to generate the cassette input data comparison ; used in the edge detection 2a95 cd3d2b call $2b3d ; sample edge 2a98 d0 ret nc ;;------------------------------------------ ;; get 256 pulses of leader/pilot 2a99 110000 ld de,$0000 ; initial total 2a9c 62 ld h,d 2a9d cd3d2b call $2b3d ; sample edge 2aa0 d0 ret nc 2aa1 eb ex de,hl ;; C = measured time ;; add measured time to total 2aa2 0600 ld b,$00 2aa4 09 add hl,bc 2aa5 eb ex de,hl 2aa6 25 dec h 2aa7 20f4 jr nz,$2a9d ; (-$0c) ;; C = duration of last pulse read ;; look for sync bit ;; and adjust the average for every non-sync ;; DE = sum of 256 edges ;; D:E forms a 8.8 fixed point number ;; D = integer part of number (integer average of 256 pulses) ;; E = fractional part of number 2aa9 61 ld h,c ; time of last pulse 2aaa 79 ld a,c 2aab 92 sub d ; subtract initial average 2aac 4f ld c,a 2aad 9f sbc a,a 2aae 47 ld b,a ;; if C>D then BC is +ve; BC = +ve delta ;; if CA ;; average>=previous (possibly read first pulse of sync or second of sync) 2abf 91 sub c ; time of current pulse 2ac0 38e7 jr c,$2aa9 ; carry set if C>(A-H) ;; to get here average>=(previous*2) ;; and this means we have just read the second pulse of the sync bit ;; calculate bit 1 timing 2ac2 7a ld a,d ; average 2ac3 1f rra ; /2 ; A = D/2 2ac4 8a adc a,d ; A = D + (D/2) ; A = D * (3/2) 2ac5 67 ld h,a ; this is the middle time ; to calculate difference between 0 and 1 bit ;; if pulse measured is > this time, then we have a 1 bit ;; if pulse measured is < this time, then we have a 0 bit ;; H = timing constant ;; L = initial cassette data input state 2ac6 22e6b1 ld ($b1e6),hl ;; read marker 2ac9 cd202b call $2b20 ; read data-byte 2acc d0 ret nc 2acd 21e5b1 ld hl,$b1e5 ; marker 2ad0 ae xor (hl) 2ad1 c0 ret nz 2ad2 37 scf 2ad3 c9 ret ;;======================================================================================== ;; write start of block 2ad4 cdf92b call $2bf9 ;; 1/100th of a second delay ;; write leader 2ad7 210108 ld hl,$0801 ;; 2049 2ada cdec2a call $2aec ;; write leader (2049 1 bits; 4096 pulses) 2add d0 ret nc ;; write sync bit 2ade b7 or a 2adf cd782b call $2b78 ;; write data-bit 2ae2 d0 ret nc ;; write marker 2ae3 3ae5b1 ld a,($b1e5) 2ae6 c3682b jp $2b68 ;; write data byte ;;============================================================================= ;; write trailer = 33 "1" bits ;; ;; carry set = trailer written successfully ;; zero set = escape was pressed 2ae9 212100 ld hl,$0021 ;; 33 ;; check for escape 2aec 06f4 ld b,$f4 ;; PPI port A 2aee ed78 in a,(c) ;; read keyboard data through PPI port A (connected to PSG port A) 2af0 e604 and $04 ;; escape key pressed? ;; bit 2 is 0 if escape key pressed 2af2 c8 ret z ;; write trailer bit 2af3 e5 push hl 2af4 37 scf ;; a "1" bit 2af5 cd782b call $2b78 ;; write data-bit 2af8 e1 pop hl 2af9 2b dec hl ;; decrement trailer bit count 2afa 7c ld a,h 2afb b5 or l 2afc 20ee jr nz,$2aec ;; 2afe 37 scf 2aff c9 ret ;;============================================================================= ;; update crc 2b00 2aebb1 ld hl,($b1eb) ;; get crc 2b03 ac xor h 2b04 f2102b jp p,$2b10 2b07 7c ld a,h 2b08 ee08 xor $08 2b0a 67 ld h,a 2b0b 7d ld a,l 2b0c ee10 xor $10 2b0e 6f ld l,a 2b0f 37 scf 2b10 ed6a adc hl,hl 2b12 22ebb1 ld ($b1eb),hl ;; store crc 2b15 c9 ret ;;======================================================================================== ;; get stored data crc and 1's complement it ;; initialise ready to write to cassette or to compare against crc from cassette 2b16 2aebb1 ld hl,($b1eb) ;; block crc ;; 1's complement crc 2b19 7d ld a,l 2b1a 2f cpl 2b1b 5f ld e,a 2b1c 7c ld a,h 2b1d 2f cpl 2b1e 57 ld d,a 2b1f c9 ret ;;======================================================================================== ;; read data-byte 2b20 d5 push de 2b21 1e08 ld e,$08 ;; number of data-bits 2b23 2ae6b1 ld hl,($b1e6) ;; H = timing constant ;; L = initial cassette data input state 2b26 cd442b call $2b44 ;; get edge 2b29 dc4d2b call c,$2b4d ;; get edge 2b2c 300d jr nc,$2b3b 2b2e 7c ld a,h ;; ideal time 2b2f 91 sub c ;; subtract measured time ;; -ve (1 pulse) or +ve (0 pulse) 2b30 9f sbc a,a ;; if -ve, set carry ;; if +ve, clear carry ;; carry flag = bit state: carry set = 1 bit, carry clear = 0 bit 2b31 cb12 rl d ;; shift carry state into bit 0 ;; updating data-byte 2b33 cd002b call $2b00 ;; update crc 2b36 1d dec e 2b37 20ea jr nz,$2b23 ; 2b39 7a ld a,d 2b3a 37 scf 2b3b d1 pop de 2b3c c9 ret ;;======================================================================================== ;; sample edge and check for escape ;; L = bit-sequence which is shifted after each edge detected ;; starts of as &55 (%01010101) ;; check for escape 2b3d 06f4 ld b,$f4 ;; PPI port A 2b3f ed78 in a,(c) ;; read keyboard data through PPI port A (connected to PSG port A) 2b41 e604 and $04 ;; escape key pressed? ;; bit 2 is 0 if escape key pressed 2b43 c8 ret z ;; precompensation? 2b44 ed5f ld a,r ;; round up to divisible by 4 ;; i.e. ;; 0->0, ;; 1->4, ;; 2->4, ;; 3->4, ;; 4->8, ;; 5->8 ;; etc 2b46 c603 add a,$03 2b48 0f rrca ;; /2 2b49 0f rrca ;; /4 2b4a e61f and $1f ;; 2b4c 4f ld c,a 2b4d 06f5 ld b,$f5 ; PPI port B input (includes cassette data input) ;; ----------------------------------------------------- ;; loop to count time between edges ;; C = time in 17us units (68T states) ;; carry set = edge arrived within time ;; carry clear = edge arrived too late 2b4f 79 ld a,c ; [1] update edge timer 2b50 c602 add a,$02 ; [2] 2b52 4f ld c,a ; [1] 2b53 380e jr c,$2b63 ; [3] overflow? 2b55 ed78 in a,(c) ; [4] read cassette input data 2b57 ad xor l ; [1] 2b58 e680 and $80 ; [2] isolate cassette input in bit 7 2b5a 20f3 jr nz,$2b4f ; [3] has bit 7 (cassette data input) changed state? ;; pulse successfully read 2b5c af xor a 2b5d ed4f ld r,a 2b5f cb0d rrc l ; toggles between 0 and 1 2b61 37 scf 2b62 c9 ret ;; time-out 2b63 af xor a 2b64 ed4f ld r,a 2b66 3c inc a ; "read error a" 2b67 c9 ret ;;======================================================================================== ;; write data byte to cassette ;; A = data byte 2b68 d5 push de 2b69 1e08 ld e,$08 ;; number of bits 2b6b 57 ld d,a 2b6c cb02 rlc d ;; shift bit state into carry 2b6e cd782b call $2b78 ;; write bit to cassette 2b71 3003 jr nc,$2b76 2b73 1d dec e 2b74 20f6 jr nz,$2b6c ;; loop for next bit 2b76 d1 pop de 2b77 c9 ret ;;======================================================================================== ;; write bit to cassette ;; ;; carry flag = state of bit ;; carry set = 1 data bit ;; carry clear = 0 data bit 2b78 ed4be8b1 ld bc,($b1e8) 2b7c 2aeab1 ld hl,($b1ea) 2b7f 9f sbc a,a 2b80 67 ld h,a 2b81 2807 jr z,$2b8a ; (+$07) 2b83 7d ld a,l 2b84 87 add a,a 2b85 80 add a,b 2b86 6f ld l,a 2b87 79 ld a,c 2b88 90 sub b 2b89 4f ld c,a 2b8a 7d ld a,l 2b8b 32e8b1 ld ($b1e8),a ;; write a low level 2b8e 2e0a ld l,$0a ; %00001010 = clear bit 5 (cassette write data) 2b90 cda72b call $2ba7 2b93 3806 jr c,$2b9b ; (+$06) 2b95 91 sub c 2b96 300c jr nc,$2ba4 ; (+$0c) 2b98 2f cpl 2b99 3c inc a 2b9a 4f ld c,a 2b9b 7c ld a,h 2b9c cd002b call $2b00 ; update crc ;; write a high level 2b9f 2e0b ld l,$0b ; %00001011 = set bit 5 (cassette write data) 2ba1 cda72b call $2ba7 2ba4 3e01 ld a,$01 2ba6 c9 ret ;;===================================================================== ;; write level to cassette ;; uses PPI control bit set/clear function ;; L = PPI Control byte ;; bit 7 = 0 ;; bit 3,2,1 = bit index ;; bit 0: 1=bit set, 0=bit clear 2ba7 ed5f ld a,r 2ba9 cb3f srl a 2bab 91 sub c 2bac 3003 jr nc,$2bb1 ; ;; delay in 4us (16T-state) units ;; total delay = ((A-1)*4) + 3 2bae 3c inc a ; [1] 2baf 20fd jr nz,$2bae ; [3] ;; set low/high level 2bb1 06f7 ld b,$f7 ; PPI control 2bb3 ed69 out (c),l ; set control 2bb5 f5 push af 2bb6 af xor a 2bb7 ed4f ld r,a 2bb9 f1 pop af 2bba c9 ret ;;===================================================================== ;; CAS START MOTOR ;; ;; start cassette motor (if cassette motor was previously off ;; allow to to achieve full rotational speed) 2bbb 3e10 ld a,$10 ; start cassette motor 2bbd 1802 jr $2bc1 ; CAS RESTORE MOTOR ;;===================================================================== ;; CAS STOP MOTOR 2bbf 3eef ld a,$ef ; stop cassette motor ;;===================================================================== ;; CAS RESTORE MOTOR ;; ;; - if motor was switched from off->on, delay for a time to allow ;; cassette motor to achieve full rotational speed ;; - if motor was switched from on->off, do nothing ;; bit 4 of register A = cassette motor state 2bc1 c5 push bc 2bc2 06f6 ld b,$f6 ; B = I/O address for PPI port C 2bc4 ed48 in c,(c) ; read current inputs (includes cassette input data) 2bc6 04 inc b ; B = I/O address for PPI control 2bc7 e610 and $10 ; isolate cassette motor state from requested ; cassette motor status 2bc9 3e08 ld a,$08 ; %00001000 = cassette motor off 2bcb 2801 jr z,$2bce 2bcd 3c inc a ; %00001001 = cassette motor on 2bce ed79 out (c),a ; set the requested motor state ; (uses PPI Control bit set/reset feature) 2bd0 37 scf 2bd1 280c jr z,$2bdf 2bd3 79 ld a,c 2bd4 e610 and $10 ; previous state 2bd6 c5 push bc 2bd7 01c800 ld bc,$00c8 ; delay in 1/100ths of a second 2bda 37 scf 2bdb cce22b call z,$2be2 ; delay for 2 seconds 2bde c1 pop bc 2bdf 79 ld a,c 2be0 c1 pop bc 2be1 c9 ret ;;================================================================= ;; delay & check for escape; allows cassette motor to achieve full ;; rotational speed ;; entry conditions: ;; B = delay factor in 1/100ths of a second ;; exit conditions: ;; c = delay completed and escape was not pressed ;; nc = escape was pressed 2be2 c5 push bc 2be3 e5 push hl 2be4 cdf92b call $2bf9 ;; 1/100th of a second delay 2be7 3e42 ld a,$42 ;; keycode for escape key 2be9 cd451e call $1e45 ;; check for escape pressed (km test key) ;; if non-zero then escape key has been pressed ;; if zero, then escape key is not pressed 2bec e1 pop hl 2bed c1 pop bc 2bee 2007 jr nz,$2bf7 ;; escape key pressed? ;; continue delay 2bf0 0b dec bc 2bf1 78 ld a,b 2bf2 b1 or c 2bf3 20ed jr nz,$2be2 ;; delay completed successfully and escape was not pressed 2bf5 37 scf 2bf6 c9 ret ;; escape was pressed 2bf7 af xor a 2bf8 c9 ret ;;======================================================================================== ;; 1/10th of a second delay 2bf9 018206 ld bc,$0682 ; [3] ;; total delay is ((BC-1)*(2+1+1+3)) + (2+1+1+2) + 3 + 3 = 11667 microseconds ;; there are 1000000 microseconds in a second ;; therefore delay is 11667/1000000 = 0.01 seconds or 1/100th of a second 2bfc 0b dec bc ; [2] 2bfd 78 ld a,b ; [1] 2bfe b1 or c ; [1] 2bff 20fb jr nz,$2bfc ; [3] 2c01 c9 ret ; [3] ;;======================================================================================== ;; EDIT ;; HL = address of buffer 2c02 c5 push bc 2c03 d5 push de 2c04 e5 push hl 2c05 cdf22d call $2df2 ; reset relative cursor pos 2c08 01ff00 ld bc,$00ff ; B = position in edit buffer ; C = number of characters remaining in buffer ;; if there is a number at the start of the line then skip it 2c0b 7e ld a,(hl) 2c0c fe30 cp $30 ; '0' 2c0e 3807 jr c,$2c17 ; (+$07) 2c10 fe3a cp $3a ; '9'+1 2c12 dc422c call c,$2c42 2c15 38f4 jr c,$2c0b ;;-------------------------------------------------------------------- ;; all other characters 2c17 78 ld a,b 2c18 b7 or a ;; zero flag set if start of buffer, zero flag clear if not start of buffer 2c19 7e ld a,(hl) 2c1a c4422c call nz,$2c42 2c1d e5 push hl 2c1e 0c inc c 2c1f 7e ld a,(hl) 2c20 23 inc hl 2c21 b7 or a 2c22 20fa jr nz,$2c1e ; (-$06) 2c24 3215b1 ld ($b115),a ; insert/overwrite mode 2c27 e1 pop hl 2c28 cde42e call $2ee4 2c2b c5 push bc 2c2c e5 push hl 2c2d cd562f call $2f56 2c30 e1 pop hl 2c31 c1 pop bc 2c32 cd482c call $2c48 2c35 30f4 jr nc,$2c2b ; (-$0c) 2c37 f5 push af 2c38 cd4f2e call $2e4f 2c3b f1 pop af 2c3c e1 pop hl 2c3d d1 pop de 2c3e c1 pop bc 2c3f fefc cp $fc 2c41 c9 ret ;;-------------------------------------------------------------------- ;; used to skip characters in input buffer 2c42 0c inc c 2c43 04 inc b ; increment pos 2c44 23 inc hl ; increment position in buffer 2c45 c3252f jp $2f25 ;;-------------------------------------------------------------------- 2c48 e5 push hl 2c49 21722c ld hl,$2c72 2c4c 5f ld e,a 2c4d 78 ld a,b 2c4e b1 or c 2c4f 7b ld a,e 2c50 200b jr nz,$2c5d ; (+$0b) 2c52 fef0 cp $f0 ; 2c54 3807 jr c,$2c5d ; (+$07) 2c56 fef4 cp $f4 2c58 3003 jr nc,$2c5d ; (+$03) ;; cursor keys 2c5a 21ae2c ld hl,$2cae ;;-------------------------------------------------------------------- 2c5d 56 ld d,(hl) 2c5e 23 inc hl 2c5f e5 push hl 2c60 23 inc hl 2c61 23 inc hl 2c62 be cp (hl) 2c63 23 inc hl 2c64 2804 jr z,$2c6a ; (+$04) 2c66 15 dec d 2c67 20f7 jr nz,$2c60 ; (-$09) 2c69 e3 ex (sp),hl 2c6a f1 pop af 2c6b 7e ld a,(hl) 2c6c 23 inc hl 2c6d 66 ld h,(hl) 2c6e 6f ld l,a 2c6f 7b ld a,e 2c70 e3 ex (sp),hl 2c71 c9 ret ;; keys for editing an existing line 2c72 defb &13 defw &2d8a defb &fc defw &2cd0 defb &ef defw &2cce defb &0d ; RETURN key defw &2cf2 defb &f0 ; up cursor key defw &2d3c defb &f1 ; down cursor key defw &2d0a defb &f2 ; left cursor key defw &2d34 defb &f3 ; right cursor key defw &2d02 defb &f8 ; CTRL key + up cursor key defw &2d4f defb &f9 ; CTRL key + down cursor key defw &2d1d defb &fa ; CTRL key + left cursor key defw &2d45 defb &fb ; CTRL key + right cursor key defw &2d14 defb &f4 ; SHIFT key + up cursor key defw &2e21 defb &f5 ; SHIFT key + down cursor key defw &2e26 defb &f6 ; SHIFT key + left cursor key defw &2e1c defb &f7 ; SHIFT key + right cursor key defw &2e17 defb &e0 ; COPY key defw &2e65 defb &7f ; ESC key defw &2dc3 defb &10 ; CLR key defw &2dcd defb &e1 ; CTRL key+TAB key (toggle insert/overwrite) defw &2d81 ;;-------------------------------------------------------------------- ;; keys for 2cae: defb &04 defw &2cfe ; Sound bleeper defb &f0 ; up cursor key defw &2cbd ; Move cursor up a line defb &f1 ; down cursor key defw &2cc1 ; Move cursor down a line defb &f2 ; left cursor key defw &2cc9 ; Move cursor back one character defb &f3 ; right cursor key defw &2cc5 ; Move cursor forward one character ;;-------------------------------------------------------------------- ;; up cursor key pressed 2cbd 3e0b ld a,$0b ; VT (Move cursor up a line) 2cbf 180a jr $2ccb ; ;;-------------------------------------------------------------------- ;; down cursor key pressed 2cc1 3e0a ld a,$0a ; LF (Move cursor down a line) 2cc3 1806 jr $2ccb ;;-------------------------------------------------------------------- ;; right cursor key pressed 2cc5 3e09 ld a,$09 ; TAB (Move cursor forward one character) 2cc7 1802 jr $2ccb ; ;;-------------------------------------------------------------------- ;; left cursor key pressed 2cc9 3e08 ld a,$08 ; BS (Move character back one character) ;;-------------------------------------------------------------------- 2ccb cdfe13 call $13fe ; TXT OUTPUT ;;-------------------------------------------------------------------- 2cce b7 or a 2ccf c9 ret ;;-------------------------------------------------------------------- 2cd0 cdf22c call $2cf2 ; display message 2cd3 f5 push af 2cd4 21ea2c ld hl,$2cea ; "*Break*" 2cd7 cdf22c call $2cf2 ; display message 2cda cd7c11 call $117c ; TXT GET CURSOR 2cdd 25 dec h 2cde 2808 jr z,$2ce8 ;; go to next line 2ce0 3e0d ld a,$0d ; CR (Move cursor to left edge of window on current line) 2ce2 cdfe13 call $13fe ; TXT OUTPUT 2ce5 cdc12c call $2cc1 ; Move cursor down a line 2ce8 f1 pop af 2ce9 c9 ret ;;-------------------------------------------------------------------- 2cea defb "*Break*",0 ;;-------------------------------------------------------------------- ;; display 0 terminated string 2cf2 f5 push af 2cf3 7e ld a,(hl) ; get character 2cf4 23 inc hl 2cf5 b7 or a ; end of string marker? 2cf6 c4252f call nz,$2f25 ; display character 2cf9 20f8 jr nz,$2cf3 ; loop for next character 2cfb f1 pop af 2cfc 37 scf 2cfd c9 ret ;;=========================================================================== 2cfe 3e07 ld a,$07 ; BEL (Sound bleeper) 2d00 18c9 jr $2ccb ;;=========================================================================== ;; right cursor key pressed 2d02 1601 ld d,$01 2d04 cd1e2d call $2d1e 2d07 28f5 jr z,$2cfe ; (-$0b) 2d09 c9 ret ;;=========================================================================== ;; down cursor key pressed 2d0a cd732d call $2d73 2d0d 79 ld a,c 2d0e 90 sub b 2d0f ba cp d 2d10 38ec jr c,$2cfe ; (-$14) 2d12 180a jr $2d1e ; (+$0a) ;;-------------------------------------------------------------------- ;; CTRL key + right cursor key pressed ;; ;; go to end of current line 2d14 cd732d call $2d73 2d17 7a ld a,d 2d18 93 sub e 2d19 c8 ret z 2d1a 57 ld d,a 2d1b 1801 jr $2d1e ; (+$01) ;;-------------------------------------------------------------------- ;; CTRL key + down cursor key pressed ;; ;; go to end of text 2d1d 51 ld d,c ;;-------------------------------------------------------------------- 2d1e 78 ld a,b 2d1f b9 cp c 2d20 c8 ret z 2d21 d5 push de 2d22 cdcd2e call $2ecd 2d25 7e ld a,(hl) 2d26 d4252f call nc,$2f25 2d29 04 inc b 2d2a 23 inc hl 2d2b d4e42e call nc,$2ee4 2d2e d1 pop de 2d2f 15 dec d 2d30 20ec jr nz,$2d1e ; (-$14) 2d32 183c jr $2d70 ; (+$3c) ;;=========================================================================== ;; left cursor key pressed 2d34 1601 ld d,$01 2d36 cd502d call $2d50 2d39 28c3 jr z,$2cfe ; (-$3d) 2d3b c9 ret ;;=========================================================================== ;; up cursor key pressed 2d3c cd732d call $2d73 2d3f 78 ld a,b 2d40 ba cp d 2d41 38bb jr c,$2cfe ; (-$45) 2d43 180b jr $2d50 ; (+$0b) ;;=========================================================================== ;; CTRL key + left cursor key pressed ;; ;; go to start of current line 2d45 cd732d call $2d73 2d48 7b ld a,e 2d49 d601 sub $01 2d4b c8 ret z 2d4c 57 ld d,a 2d4d 1801 jr $2d50 ; (+$01) ;;=========================================================================== ;; CTRL key + up cursor key pressed ;; go to start of text 2d4f 51 ld d,c 2d50 78 ld a,b 2d51 b7 or a 2d52 c8 ret z 2d53 cdc72e call $2ec7 2d56 3007 jr nc,$2d5f ; (+$07) 2d58 05 dec b 2d59 2b dec hl 2d5a 15 dec d 2d5b 20f3 jr nz,$2d50 ; (-$0d) 2d5d 1811 jr $2d70 ; (+$11) ;;=========================================================================== 2d5f 78 ld a,b 2d60 b7 or a 2d61 280a jr z,$2d6d ; (+$0a) 2d63 05 dec b 2d64 2b dec hl 2d65 d5 push de 2d66 cda22e call $2ea2 2d69 d1 pop de 2d6a 15 dec d 2d6b 20f2 jr nz,$2d5f ; (-$0e) 2d6d cde42e call $2ee4 2d70 f6ff or $ff 2d72 c9 ret ;;-------------------------------------------------------------------- 2d73 e5 push hl 2d74 cd5212 call $1252 ; TXT GET WINDOW 2d77 7a ld a,d 2d78 94 sub h 2d79 3c inc a 2d7a 57 ld d,a 2d7b cd7c11 call $117c ; TXT GET CURSOR 2d7e 5c ld e,h 2d7f e1 pop hl 2d80 c9 ret ;;-------------------------------------------------------------------- ;; CTRL key + TAB key ;; ;; toggle insert/overwrite mode 2d81 3a15b1 ld a,($b115) ; insert/overwrite mode 2d84 2f cpl 2d85 3215b1 ld ($b115),a 2d88 b7 or a 2d89 c9 ret ;;-------------------------------------------------------------------- 2d8a b7 or a 2d8b c8 ret z 2d8c 5f ld e,a 2d8d 3a15b1 ld a,($b115) ; insert/overwrite mode 2d90 b7 or a 2d91 79 ld a,c 2d92 280b jr z,$2d9f ; (+$0b) 2d94 b8 cp b 2d95 2808 jr z,$2d9f ; (+$08) 2d97 73 ld (hl),e 2d98 23 inc hl 2d99 04 inc b 2d9a b7 or a 2d9b 7b ld a,e 2d9c c3252f jp $2f25 2d9f feff cp $ff 2da1 cafe2c jp z,$2cfe 2da4 af xor a 2da5 3214b1 ld ($b114),a 2da8 cd9b2d call $2d9b 2dab 0c inc c 2dac e5 push hl 2dad 7e ld a,(hl) 2dae 73 ld (hl),e 2daf 5f ld e,a 2db0 23 inc hl 2db1 b7 or a 2db2 20f9 jr nz,$2dad ; (-$07) 2db4 77 ld (hl),a 2db5 e1 pop hl 2db6 04 inc b 2db7 23 inc hl 2db8 cde42e call $2ee4 2dbb 3a14b1 ld a,($b114) 2dbe b7 or a 2dbf c4a22e call nz,$2ea2 2dc2 c9 ret ;; ESC key pressed 2dc3 78 ld a,b 2dc4 b7 or a 2dc5 c4c72e call nz,$2ec7 2dc8 d2fe2c jp nc,$2cfe 2dcb 05 dec b 2dcc 2b dec hl ;; CLR key pressed 2dcd 78 ld a,b 2dce b9 cp c 2dcf cafe2c jp z,$2cfe 2dd2 e5 push hl 2dd3 23 inc hl 2dd4 7e ld a,(hl) 2dd5 2b dec hl 2dd6 77 ld (hl),a 2dd7 23 inc hl 2dd8 b7 or a 2dd9 20f8 jr nz,$2dd3 ; (-$08) 2ddb 2b dec hl 2ddc 3620 ld (hl),$20 2dde 3214b1 ld ($b114),a 2de1 e3 ex (sp),hl 2de2 cde42e call $2ee4 2de5 e3 ex (sp),hl 2de6 3600 ld (hl),$00 2de8 e1 pop hl 2de9 0d dec c 2dea 3a14b1 ld a,($b114) 2ded b7 or a 2dee c4a62e call nz,$2ea6 2df1 c9 ret ;;-------------------------------------------------------------------- ;; initialise relative copy cursor position to origin 2df2 af xor a 2df3 3216b1 ld ($b116),a 2df6 3217b1 ld ($b117),a 2df9 c9 ret ;;-------------------------------------------------------------------- ;; compare copy cursor relative position ;; HL = cursor position 2dfa ed5b16b1 ld de,($b116) 2dfe 7c ld a,h 2dff aa xor d 2e00 c0 ret nz 2e01 7d ld a,l 2e02 ab xor e 2e03 c0 ret nz 2e04 37 scf 2e05 c9 ret ;;-------------------------------------------------------------------- 2e06 4f ld c,a 2e07 cdc12e call $2ec1 ; get copy cursor position 2e0a c8 ret z ; quit if not active ;; adjust y position 2e0b 7d ld a,l 2e0c 81 add a,c 2e0d 6f ld l,a ;; validate new position 2e0e cdca11 call $11ca ; TXT VALIDATE 2e11 30df jr nc,$2df2 ; reset relative cursor pos ;; set cursor position 2e13 2216b1 ld ($b116),hl 2e16 c9 ret ;;-------------------------------------------------------------------- ;; SHIFT key + left cursor key ;; ;; move copy cursor left 2e17 110001 ld de,$0100 2e1a 180d jr $2e29 ; (+$0d) ;;-------------------------------------------------------------------- ;; SHIFT key + right cursor pressed ;; ;; move copy cursor right 2e1c 1100ff ld de,$ff00 2e1f 1808 jr $2e29 ; (+$08) ;;-------------------------------------------------------------------- ;; SHIFT key + up cursor pressed ;; ;; move copy cursor up 2e21 11ff00 ld de,$00ff 2e24 1803 jr $2e29 ; (+$03) ;;-------------------------------------------------------------------- ;; SHIFT key + left cursor pressed ;; ;; move copy cursor down 2e26 110100 ld de,$0001 ;;-------------------------------------------------------------------- ;; D = column increment ;; E = row increment 2e29 c5 push bc 2e2a e5 push hl 2e2b cdc12e call $2ec1 ; get copy cursor position ;; get cursor position 2e2e cc7c11 call z,$117c ; TXT GET CURSOR ;; adjust cursor position ;; adjust column 2e31 7c ld a,h 2e32 82 add a,d 2e33 67 ld h,a ;; adjust row 2e34 7d ld a,l 2e35 83 add a,e 2e36 6f ld l,a ;; validate the position 2e37 cdca11 call $11ca ; TXT VALIDATE 2e3a 300b jr nc,$2e47 ; position invalid? ;; position is valid 2e3c e5 push hl 2e3d cd4f2e call $2e4f 2e40 e1 pop hl ;; store new position 2e41 2216b1 ld ($b116),hl 2e44 cd4a2e call $2e4a ;;---------------- 2e47 e1 pop hl 2e48 c1 pop bc 2e49 c9 ret ;;-------------------------------------------------------------------- 2e4a 116512 ld de,$1265 ; TXT PLACE CURSOR/TXT REMOVE CURSOR 2e4d 1803 jr $2e52 ;;-------------------------------------------------------------------- 2e4f 116512 ld de,$1265 ; TXT PLACE CURSOR/TXT REMOVE CURSOR ;;-------------------------------------------------------------------- 2e52 cdc12e call $2ec1 ; get copy cursor position 2e55 c8 ret z 2e56 e5 push hl 2e57 cd7c11 call $117c ; TXT GET CURSOR 2e5a e3 ex (sp),hl 2e5b cd7011 call $1170 ; TXT SET CURSOR 2e5e cd1600 call $0016 ; LOW: PCDE INSTRUCTION 2e61 e1 pop hl 2e62 c37011 jp $1170 ; TXT SET CURSOR ;;-------------------------------------------------------------------- ;; COPY key pressed 2e65 c5 push bc 2e66 e5 push hl 2e67 cd7c11 call $117c ; TXT GET CURSOR 2e6a eb ex de,hl 2e6b cdc12e call $2ec1 2e6e 200c jr nz,$2e7c ; (+$0c) 2e70 78 ld a,b 2e71 b1 or c 2e72 2026 jr nz,$2e9a ; (+$26) 2e74 cd7c11 call $117c ; TXT GET CURSOR 2e77 2216b1 ld ($b116),hl 2e7a 1806 jr $2e82 ; (+$06) ;;-------------------------------------------------------------------- 2e7c cd7011 call $1170 ; TXT SET CURSOR 2e7f cd6512 call $1265 ; TXT PLACE CURSOR/TXT REMOVE CURSOR 2e82 cdac13 call $13ac ; TXT RD CHAR 2e85 f5 push af 2e86 eb ex de,hl 2e87 cd7011 call $1170 ; TXT SET CURSOR 2e8a 2a16b1 ld hl,($b116) 2e8d 24 inc h 2e8e cdca11 call $11ca ; TXT VALIDATE 2e91 3003 jr nc,$2e96 ; (+$03) 2e93 2216b1 ld ($b116),hl 2e96 cd4a2e call $2e4a 2e99 f1 pop af 2e9a e1 pop hl 2e9b c1 pop bc 2e9c da8a2d jp c,$2d8a 2e9f c3fe2c jp $2cfe ;;-------------------------------------------------------------------- 2ea2 1601 ld d,$01 2ea4 1802 jr $2ea8 ; (+$02) ;;-------------------------------------------------------------------- 2ea6 16ff ld d,$ff ;;-------------------------------------------------------------------- 2ea8 c5 push bc 2ea9 e5 push hl 2eaa d5 push de 2eab cd4f2e call $2e4f 2eae d1 pop de 2eaf cdc12e call $2ec1 2eb2 2809 jr z,$2ebd ; (+$09) 2eb4 7c ld a,h 2eb5 82 add a,d 2eb6 67 ld h,a 2eb7 cd0e2e call $2e0e 2eba cd4a2e call $2e4a 2ebd e1 pop hl 2ebe c1 pop bc 2ebf b7 or a 2ec0 c9 ret ;;-------------------------------------------------------------------- ;; get copy cursor position ;; this is relative to the actual cursor pos ;; ;; zero flag set if cursor is not active 2ec1 2a16b1 ld hl,($b116) 2ec4 7c ld a,h 2ec5 b5 or l 2ec6 c9 ret ;;-------------------------------------------------------------------- ;; try to move cursor left? 2ec7 d5 push de 2ec8 1108ff ld de,$ff08 2ecb 1804 jr $2ed1 ; (+$04) ;;-------------------------------------------------------------------- ;; try to move cursor right? 2ecd d5 push de 2ece 110901 ld de,$0109 ;;-------------------------------------------------------------------- ;; D = column increment ;; E = character to plot 2ed1 c5 push bc 2ed2 e5 push hl ;; get current cursor position 2ed3 cd7c11 call $117c ; TXT GET CURSOR ;; adjust cursor position 2ed6 7a ld a,d ; column increment 2ed7 84 add a,h ; add on column 2ed8 67 ld h,a ; final column ;; validate this new position 2ed9 cdca11 call $11ca ; TXT VALIDATE ;; if valid then output character, otherwise report error 2edc 7b ld a,e 2edd dcfe13 call c,$13fe ; TXT OUTPUT 2ee0 e1 pop hl 2ee1 c1 pop bc 2ee2 d1 pop de 2ee3 c9 ret ;;-------------------------------------------------------------------- 2ee4 c5 push bc 2ee5 e5 push hl 2ee6 eb ex de,hl 2ee7 cd7c11 call $117c ; TXT GET CURSOR 2eea 4f ld c,a 2eeb eb ex de,hl 2eec 7e ld a,(hl) 2eed 23 inc hl 2eee b7 or a 2eef c4022f call nz,$2f02 2ef2 20f8 jr nz,$2eec ; (-$08) 2ef4 cd7c11 call $117c ; TXT GET CURSOR 2ef7 91 sub c 2ef8 eb ex de,hl 2ef9 85 add a,l 2efa 6f ld l,a 2efb cd7011 call $1170 ; TXT SET CURSOR 2efe e1 pop hl 2eff c1 pop bc 2f00 b7 or a 2f01 c9 ret 2f02 f5 push af 2f03 c5 push bc 2f04 d5 push de 2f05 e5 push hl 2f06 47 ld b,a 2f07 cd7c11 call $117c ; TXT GET CURSOR 2f0a 91 sub c 2f0b 83 add a,e 2f0c 5f ld e,a 2f0d 48 ld c,b 2f0e cdca11 call $11ca ; TXT VALIDATE 2f11 3805 jr c,$2f18 ; (+$05) 2f13 78 ld a,b 2f14 87 add a,a 2f15 3c inc a 2f16 83 add a,e 2f17 5f ld e,a 2f18 eb ex de,hl 2f19 cdca11 call $11ca ; TXT VALIDATE 2f1c 79 ld a,c 2f1d dc252f call c,$2f25 2f20 e1 pop hl 2f21 d1 pop de 2f22 c1 pop bc 2f23 f1 pop af 2f24 c9 ret 2f25 f5 push af 2f26 c5 push bc 2f27 d5 push de 2f28 e5 push hl 2f29 47 ld b,a 2f2a cd7c11 call $117c ; TXT GET CURSOR 2f2d 4f ld c,a 2f2e c5 push bc 2f2f cdca11 call $11ca ; TXT VALIDATE 2f32 c1 pop bc 2f33 dcfa2d call c,$2dfa 2f36 f5 push af 2f37 dc4f2e call c,$2e4f 2f3a 78 ld a,b 2f3b c5 push bc 2f3c cd3513 call $1335 ; TXT WR CHAR 2f3f c1 pop bc 2f40 cd7c11 call $117c ; TXT GET CURSOR 2f43 91 sub c 2f44 c4062e call nz,$2e06 2f47 f1 pop af 2f48 3007 jr nc,$2f51 ; (+$07) 2f4a 9f sbc a,a 2f4b 3214b1 ld ($b114),a 2f4e cd4a2e call $2e4a 2f51 e1 pop hl 2f52 d1 pop de 2f53 c1 pop bc 2f54 f1 pop af 2f55 c9 ret 2f56 cd7c11 call $117c ; TXT GET CURSOR 2f59 4f ld c,a 2f5a cdca11 call $11ca ; TXT VALIDATE 2f5d cdfa2d call $2dfa 2f60 dabf1b jp c,$1bbf ; KM WAIT CHAR 2f63 cd7612 call $1276 ; TXT CUR ON 2f66 cd7c11 call $117c ; TXT GET CURSOR 2f69 91 sub c 2f6a c4062e call nz,$2e06 2f6d cdbf1b call $1bbf ; KM WAIT CHAR 2f70 c37e12 jp $127e ; TXT CUR OFF ;;=========================================================================================== ;; MATHS FUNCTIONS ;; REAL: PI 2f73 11782f ld de,$2f78 2f76 1819 jr $2f91 2f78 defb &a2,&da,&0f,&49,&82 ;; PI in floating point format ;;=========================================================================================== ;; REAL: ONE 2f7d 11822f ld de,$2f82 2f80 180f jr $2f91 ; (+$0f) 2f82 defb &00,&00,&00,&00,&81 ;; 1 in floating point format ;;=========================================================================================== 2f87 eb ex de,hl 2f88 210eb1 ld hl,$b10e 2f8b 1804 jr $2f91 ; (+$04) ;;=========================================================================================== 2f8d 1104b1 ld de,$b104 2f90 eb ex de,hl ;; REAL move ;; HL = points to address to write floating point number to ;; DE = points to address of a floating point number 2f91 e5 push hl 2f92 d5 push de 2f93 c5 push bc 2f94 eb ex de,hl 2f95 010500 ld bc,$0005 2f98 edb0 ldir 2f9a c1 pop bc 2f9b d1 pop de 2f9c e1 pop hl 2f9d 37 scf 2f9e c9 ret ;; INT to real 2f9f d5 push de 2fa0 c5 push bc 2fa1 f67f or $7f 2fa3 47 ld b,a 2fa4 af xor a 2fa5 12 ld (de),a 2fa6 13 inc de 2fa7 12 ld (de),a 2fa8 13 inc de 2fa9 0e90 ld c,$90 2fab b4 or h 2fac 200d jr nz,$2fbb ; (+$0d) 2fae 4f ld c,a 2faf b5 or l 2fb0 280d jr z,$2fbf ; (+$0d) 2fb2 6c ld l,h 2fb3 0e88 ld c,$88 2fb5 1804 jr $2fbb ; (+$04) 2fb7 0d dec c 2fb8 cb25 sla l 2fba 8f adc a,a 2fbb f2b72f jp p,$2fb7 2fbe a0 and b 2fbf eb ex de,hl 2fc0 73 ld (hl),e 2fc1 23 inc hl 2fc2 77 ld (hl),a 2fc3 23 inc hl 2fc4 71 ld (hl),c 2fc5 c1 pop bc 2fc6 e1 pop hl 2fc7 c9 ret ;; BIN to real 2fc8 c5 push bc 2fc9 0100a0 ld bc,$a000 2fcc cdd32f call $2fd3 2fcf c1 pop bc 2fd0 c9 ret 2fd1 06a8 ld b,$a8 2fd3 d5 push de 2fd4 cd9c37 call $379c 2fd7 d1 pop de 2fd8 c9 ret ;; REAL to int 2fd9 e5 push hl 2fda dde1 pop ix 2fdc af xor a 2fdd dd9604 sub (ix+$04) 2fe0 281b jr z,$2ffd ; (+$1b) 2fe2 c690 add a,$90 2fe4 d0 ret nc 2fe5 d5 push de 2fe6 c5 push bc 2fe7 c610 add a,$10 2fe9 cd3d37 call $373d 2fec cb21 sla c 2fee ed5a adc hl,de 2ff0 2808 jr z,$2ffa ; (+$08) 2ff2 dd7e03 ld a,(ix+$03) 2ff5 b7 or a 2ff6 3f ccf 2ff7 c1 pop bc 2ff8 d1 pop de 2ff9 c9 ret 2ffa 9f sbc a,a 2ffb 18f9 jr $2ff6 ; (-$07) 2ffd 6f ld l,a 2ffe 67 ld h,a 2fff 37 scf 3000 c9 ret ;; REAL to bin 3001 cd1430 call $3014 3004 d0 ret nc 3005 f0 ret p 3006 e5 push hl 3007 79 ld a,c 3008 34 inc (hl) 3009 2006 jr nz,$3011 ; (+$06) 300b 23 inc hl 300c 3d dec a 300d 20f9 jr nz,$3008 ; (-$07) 300f 34 inc (hl) 3010 0c inc c 3011 e1 pop hl 3012 37 scf 3013 c9 ret ;; REAL fix 3014 e5 push hl 3015 d5 push de 3016 e5 push hl 3017 dde1 pop ix 3019 af xor a 301a dd9604 sub (ix+$04) 301d 200a jr nz,$3029 ; (+$0a) 301f 0604 ld b,$04 3021 77 ld (hl),a 3022 23 inc hl 3023 10fc djnz $3021 ; (-$04) 3025 0e01 ld c,$01 3027 1828 jr $3051 ; (+$28) 3029 c6a0 add a,$a0 302b 3025 jr nc,$3052 ; (+$25) 302d e5 push hl 302e cd3d37 call $373d 3031 af xor a 3032 b8 cp b 3033 8f adc a,a 3034 b1 or c 3035 4d ld c,l 3036 44 ld b,h 3037 e1 pop hl 3038 71 ld (hl),c 3039 23 inc hl 303a 70 ld (hl),b 303b 23 inc hl 303c 73 ld (hl),e 303d 23 inc hl 303e 5f ld e,a 303f 7e ld a,(hl) 3040 72 ld (hl),d 3041 e680 and $80 3043 47 ld b,a 3044 0e04 ld c,$04 3046 af xor a 3047 b6 or (hl) 3048 2005 jr nz,$304f ; (+$05) 304a 2b dec hl 304b 0d dec c 304c 20f9 jr nz,$3047 ; (-$07) 304e 0c inc c 304f 7b ld a,e 3050 b7 or a 3051 37 scf 3052 d1 pop de 3053 e1 pop hl 3054 c9 ret ;; REAL int 3055 cd1430 call $3014 3058 d0 ret nc 3059 c8 ret z 305a cb78 bit 7,b 305c c8 ret z 305d 18a7 jr $3006 ; (-$59) 305f cd2737 call $3727 3062 47 ld b,a 3063 2852 jr z,$30b7 ; (+$52) 3065 fc3437 call m,$3734 3068 e5 push hl 3069 dd7e04 ld a,(ix+$04) 306c d680 sub $80 306e 5f ld e,a 306f 9f sbc a,a 3070 57 ld d,a 3071 6b ld l,e 3072 62 ld h,d 3073 29 add hl,hl 3074 29 add hl,hl 3075 29 add hl,hl 3076 19 add hl,de 3077 29 add hl,hl 3078 19 add hl,de 3079 29 add hl,hl 307a 29 add hl,hl 307b 19 add hl,de 307c 7c ld a,h 307d d609 sub $09 307f 4f ld c,a 3080 e1 pop hl 3081 c5 push bc 3082 c4c830 call nz,$30c8 3085 11bc30 ld de,$30bc 3088 cde236 call $36e2 308b 300b jr nc,$3098 ; (+$0b) 308d 11f530 ld de,$30f5 ; start of power's of ten 3090 cd7735 call $3577 3093 d1 pop de 3094 1d dec e 3095 d5 push de 3096 18ed jr $3085 ; (-$13) 3098 11c130 ld de,$30c1 309b cde236 call $36e2 309e 380b jr c,$30ab ; (+$0b) 30a0 11f530 ld de,$30f5 ; start of power's of ten 30a3 cd0436 call $3604 30a6 d1 pop de 30a7 1c inc e 30a8 d5 push de 30a9 18ed jr $3098 ; (-$13) 30ab cd0130 call $3001 30ae 79 ld a,c 30af d1 pop de 30b0 42 ld b,d 30b1 3d dec a 30b2 85 add a,l 30b3 6f ld l,a 30b4 d0 ret nc 30b5 24 inc h 30b6 c9 ret 30b7 5f ld e,a 30b8 77 ld (hl),a 30b9 0e01 ld c,$01 30bb c9 ret 30bc defb &f0,&1f,&bc,&3e,&96 30c1 defb &fe,&27,&7b,&6e,&9e ;; REAL exp A 30c6 2f cpl 30c7 3c inc a 30c8 b7 or a 30c9 37 scf 30ca c8 ret z 30cb 4f ld c,a 30cc f2d130 jp p,$30d1 30cf 2f cpl 30d0 3c inc a 30d1 113131 ld de,$3131 30d4 d60d sub $0d 30d6 2815 jr z,$30ed ; (+$15) 30d8 3809 jr c,$30e3 ; (+$09) 30da c5 push bc 30db f5 push af 30dc cded30 call $30ed 30df f1 pop af 30e0 c1 pop bc 30e1 18ee jr $30d1 ; (-$12) 30e3 47 ld b,a 30e4 87 add a,a 30e5 87 add a,a 30e6 80 add a,b 30e7 83 add a,e 30e8 5f ld e,a 30e9 3eff ld a,$ff 30eb 8a adc a,d 30ec 57 ld d,a 30ed 79 ld a,c 30ee b7 or a 30ef f20436 jp p,$3604 30f2 c37735 jp $3577 ;;=========================================================================================== ;; power's of 10 in internal floating point representation ;; 30f5 defb &00,&00,&00,&00,&84 ;; 10 (10^1) defb &00,&00,&00,&48,&87 ;; 100 (10^2) defb &00,&00,&00,&7A,&8A ;; 1000 (10^3) defb &00,&00,&40,&1c,&8e ;; 10000 (10^4) (1E+4) defb &00,&00,&50,&43,&91 ;; 100000 (10^5) (1E+5) defb &00,&00,&24,&74,&94 ;; 1000000 (10^6) (1E+6) defb &00,&80,&96,&18,&98 ;; 10000000 (10^7) (1E+7) defb &00,&20,&bc,&3e,&9b ;; 100000000 (10^8) (1E+8) defb &00,&28,&6b,&6e,&9e ;; 1000000000 (10^9) (1E+9) defb &00,&f9,&02,&15,&a2 ;; 10000000000 (10^10) (1E+10) defb &40,&b7,&43,&3a,&a5 ;; 100000000000 (10^11) (1E+11) defb &10,&a5,&d4,&68,&a8 ;; 1000000000000 (10^12) (1E+12) defb &2a,&e7,&84,&11,&ac ;; 10000000000000 (10^13) (1E+13) ;;=========================================================================================== 3136 216589 ld hl,&8965 3139 2202b1 ld ($b102),hl 313c 21076c ld hl,$6c07 313f 2200b1 ld ($b100),hl 3142 c9 ret ;; RANDOMIZE seed 3143 eb ex de,hl 3144 cd3631 call $3136 3147 eb ex de,hl 3148 cd2737 call $3727 314b c8 ret z 314c 1100b1 ld de,$b100 314f 0604 ld b,$04 3151 1a ld a,(de) 3152 ae xor (hl) 3153 12 ld (de),a 3154 13 inc de 3155 23 inc hl 3156 10f9 djnz $3151 ; (-$07) 3158 c9 ret ;; REAL rnd 3159 e5 push hl 315a 2a02b1 ld hl,($b102) 315d 01076c ld bc,$6c07 3160 cd9c31 call $319c 3163 e5 push hl 3164 2a00b1 ld hl,($b100) 3167 016589 ld bc,$8965 316a cd9c31 call $319c 316d d5 push de 316e e5 push hl 316f 2a02b1 ld hl,($b102) 3172 cd9c31 call $319c 3175 e3 ex (sp),hl 3176 09 add hl,bc 3177 2200b1 ld ($b100),hl 317a e1 pop hl 317b 01076c ld bc,$6c07 317e ed4a adc hl,bc 3180 c1 pop bc 3181 09 add hl,bc 3182 c1 pop bc 3183 09 add hl,bc 3184 2202b1 ld ($b102),hl 3187 e1 pop hl ;; REAL rnd0 3188 e5 push hl 3189 dde1 pop ix 318b 2a00b1 ld hl,($b100) 318e ed5b02b1 ld de,($b102) 3192 010000 ld bc,$0000 3195 dd360480 ld (ix+$04),$80 3199 c3ac37 jp $37ac 319c eb ex de,hl 319d 210000 ld hl,$0000 31a0 3e11 ld a,$11 31a2 3d dec a 31a3 c8 ret z 31a4 29 add hl,hl 31a5 cb13 rl e 31a7 cb12 rl d 31a9 30f7 jr nc,$31a2 ; (-$09) 31ab 09 add hl,bc 31ac 30f4 jr nc,$31a2 ; (-$0c) 31ae 13 inc de 31af 18f1 jr $31a2 ; (-$0f) ;; REAL log10 31b1 112a32 ld de,$322a 31b4 1803 jr $31b9 ; (+$03) ;; REAL log 31b6 112532 ld de,$3225 31b9 cd2737 call $3727 31bc 3d dec a 31bd fe01 cp $01 31bf d0 ret nc 31c0 d5 push de 31c1 cdd336 call $36d3 31c4 f5 push af 31c5 dd360480 ld (ix+$04),$80 31c9 112032 ld de,$3220 31cc cddf36 call $36df 31cf 3006 jr nc,$31d7 ; (+$06) 31d1 dd3404 inc (ix+$04) 31d4 f1 pop af 31d5 3d dec a 31d6 f5 push af 31d7 cd872f call $2f87 31da d5 push de 31db 11822f ld de,$2f82 31de d5 push de 31df cda234 call $34a2 31e2 d1 pop de 31e3 e3 ex (sp),hl 31e4 cd9a34 call $349a 31e7 d1 pop de 31e8 cd0436 call $3604 31eb cd4034 call $3440 31ee 04 inc b 31ef 4c ld c,h 31f0 4b ld c,e 31f1 57 ld d,a 31f2 5e ld e,(hl) 31f3 7f ld a,a 31f4 0d dec c 31f5 08 ex af,af' 31f6 9b sbc a,e 31f7 13 inc de 31f8 80 add a,b 31f9 23 inc hl 31fa 93 sub e 31fb 3876 jr c,$3273 ; (+$76) 31fd 80 add a,b 31fe 203b jr nz,$323b ; (+$3b) 3200 aa xor d 3201 3882 jr c,$3185 ; (-$7e) 3203 d5 push de 3204 cd7735 call $3577 3207 d1 pop de 3208 e3 ex (sp),hl 3209 7c ld a,h 320a b7 or a 320b f21032 jp p,$3210 320e 2f cpl 320f 3c inc a 3210 6f ld l,a 3211 7c ld a,h 3212 2600 ld h,$00 3214 cd9f2f call $2f9f 3217 eb ex de,hl 3218 e1 pop hl 3219 cda234 call $34a2 321c d1 pop de 321d c37735 jp $3577 3220 defb &34,&f3,&04,&35,&80 ;; 0.707106781 defb &f8,&17,&72,&31,&80 ;; 0.693147181 defb &85,&9a,&20,&1a,&7f ;; 0.301029996 ;; REAL exp 322f 06e1 ld b,$e1 3231 cd9234 call $3492 3234 d27d2f jp nc,$2f7d 3237 11a232 ld de,$32a2 323a cddf36 call $36df 323d f2e837 jp p,$37e8 3240 11a732 ld de,$32a7 3243 cddf36 call $36df 3246 fae237 jp m,$37e2 3249 119d32 ld de,$329d 324c cd6934 call $3469 324f 7b ld a,e 3250 f25532 jp p,$3255 3253 ed44 neg 3255 f5 push af 3256 cd7035 call $3570 3259 cd8d2f call $2f8d 325c d5 push de 325d cd4334 call $3443 3260 03 inc bc 3261 f432eb call p,$eb32 3264 0f rrca 3265 73 ld (hl),e 3266 08 ex af,af' 3267 b8 cp b 3268 d5 push de 3269 52 ld d,d 326a 7b ld a,e 326b 00 nop 326c 00 nop 326d 00 nop 326e 00 nop 326f 80 add a,b 3270 e3 ex (sp),hl 3271 cd4334 call $3443 3274 02 ld (bc),a 3275 09 add hl,bc 3276 60 ld h,b 3277 de01 sbc a,$01 3279 78 ld a,b 327a f8 ret m 327b 17 rla 327c 72 ld (hl),d 327d 317ecd ld sp,$cd7e 3280 77 ld (hl),a 3281 35 dec (hl) 3282 d1 pop de 3283 e5 push hl 3284 eb ex de,hl 3285 cd9a34 call $349a 3288 eb ex de,hl 3289 e1 pop hl 328a cd0436 call $3604 328d 116b32 ld de,$326b 3290 cda234 call $34a2 3293 f1 pop af 3294 37 scf 3295 dd8e04 adc a,(ix+$04) 3298 dd7704 ld (ix+$04),a 329b 37 scf 329c c9 ret 329d 29 add hl,hl 329e 3b dec sp 329f aa xor d 32a0 3881 jr c,$3223 ; (-$7f) 32a2 c7 rst $00 32a3 33 inc sp 32a4 0f rrca 32a5 3087 jr nc,$322e ; (-$79) 32a7 f8 ret m 32a8 17 rla 32a9 72 ld (hl),d 32aa b1 or c 32ab 87 add a,a ;; REAL sqr 32ac 116b32 ld de,$326b ;; REAL power 32af eb ex de,hl 32b0 cd2737 call $3727 32b3 eb ex de,hl 32b4 ca7d2f jp z,$2f7d 32b7 f5 push af 32b8 cd2737 call $3727 32bb 2825 jr z,$32e2 ; (+$25) 32bd 47 ld b,a 32be fc3437 call m,$3734 32c1 e5 push hl 32c2 cd2433 call $3324 32c5 e1 pop hl 32c6 3825 jr c,$32ed ; (+$25) 32c8 e3 ex (sp),hl 32c9 e1 pop hl 32ca faea32 jp m,$32ea 32cd c5 push bc 32ce d5 push de 32cf cdb631 call $31b6 32d2 d1 pop de 32d3 dc7735 call c,$3577 32d6 dc2f32 call c,$322f 32d9 c1 pop bc 32da d0 ret nc 32db 78 ld a,b 32dc b7 or a 32dd fc3137 call m,$3731 32e0 37 scf 32e1 c9 ret 32e2 f1 pop af 32e3 37 scf 32e4 f0 ret p 32e5 cde837 call $37e8 32e8 af xor a 32e9 c9 ret 32ea af xor a 32eb 3c inc a 32ec c9 ret 32ed 4f ld c,a 32ee f1 pop af 32ef c5 push bc 32f0 f5 push af 32f1 79 ld a,c 32f2 37 scf 32f3 8f adc a,a 32f4 30fd jr nc,$32f3 ; (-$03) 32f6 47 ld b,a 32f7 cd8d2f call $2f8d 32fa eb ex de,hl 32fb 78 ld a,b 32fc 87 add a,a 32fd 2815 jr z,$3314 ; (+$15) 32ff f5 push af 3300 cd7035 call $3570 3303 3016 jr nc,$331b ; (+$16) 3305 f1 pop af 3306 30f4 jr nc,$32fc ; (-$0c) 3308 f5 push af 3309 1104b1 ld de,$b104 330c cd7735 call $3577 330f 300a jr nc,$331b ; (+$0a) 3311 f1 pop af 3312 18e8 jr $32fc ; (-$18) 3314 f1 pop af 3315 37 scf 3316 fcfb35 call m,$35fb 3319 18be jr $32d9 ; (-$42) 331b f1 pop af 331c f1 pop af 331d c1 pop bc 331e fae237 jp m,$37e2 3321 c3ea37 jp $37ea 3324 c5 push bc 3325 cd882f call $2f88 3328 cd1430 call $3014 332b 79 ld a,c 332c c1 pop bc 332d 3002 jr nc,$3331 ; (+$02) 332f 2803 jr z,$3334 ; (+$03) 3331 78 ld a,b 3332 b7 or a 3333 c9 ret 3334 4f ld c,a 3335 7e ld a,(hl) 3336 1f rra 3337 9f sbc a,a 3338 a0 and b 3339 47 ld b,a 333a 79 ld a,c 333b fe02 cp $02 333d 9f sbc a,a 333e d0 ret nc 333f 7e ld a,(hl) 3340 fe27 cp $27 3342 d8 ret c 3343 af xor a 3344 c9 ret 3345 3213b1 ld ($b113),a 3348 c9 ret ;; REAL cosine 3349 cd2737 call $3727 334c fc3437 call m,$3734 334f f601 or $01 3351 1801 jr $3354 ; (+$01) ;; REAL sin 3353 af xor a 3354 f5 push af 3355 11b433 ld de,$33b4 3358 06f0 ld b,$f0 335a 3a13b1 ld a,($b113) 335d b7 or a 335e 2805 jr z,$3365 ; (+$05) 3360 11b933 ld de,$33b9 3363 06f6 ld b,$f6 3365 cd9234 call $3492 3368 303a jr nc,$33a4 ; (+$3a) 336a f1 pop af 336b cd6a34 call $346a 336e d0 ret nc 336f 7b ld a,e 3370 1f rra 3371 dc3437 call c,$3734 3374 06e8 ld b,$e8 3376 cd9234 call $3492 3379 d2e237 jp nc,$37e2 337c dd3404 inc (ix+$04) 337f cd4034 call $3440 3382 061b ld b,$1b 3384 2d dec l 3385 1a ld a,(de) 3386 e66e and $6e 3388 f8 ret m 3389 fb ei 338a 07 rlca 338b 2874 jr z,$3401 ; (+$74) 338d 018968 ld bc,$6889 3390 99 sbc a,c 3391 79 ld a,c 3392 e1 pop hl 3393 df rst $18 3394 35 dec (hl) 3395 23 inc hl 3396 7d ld a,l 3397 28e7 jr z,$3380 ; (-$19) 3399 5d ld e,l 339a a5 and l 339b 80 add a,b 339c a2 and d 339d da0f49 jp c,$490f 33a0 81 add a,c 33a1 c37735 jp $3577 33a4 f1 pop af 33a5 c27d2f jp nz,$2f7d 33a8 3a13b1 ld a,($b113) 33ab fe01 cp $01 33ad d8 ret c 33ae 11be33 ld de,$33be 33b1 c37735 jp $3577 33b4 6e ld l,(hl) 33b5 83 add a,e 33b6 f9 ld sp,hl 33b7 227fb6 ld ($b67f),hl 33ba 60 ld h,b 33bb 0b dec bc 33bc 3679 ld (hl),$79 33be 13 inc de 33bf 35 dec (hl) 33c0 fa0e7b jp m,$7b0e 33c3 d3e0 out ($e0),a 33c5 2e65 ld l,$65 33c7 86 add a,(hl) ;; REAL tan 33c8 cd8d2f call $2f8d 33cb d5 push de 33cc cd4933 call $3349 33cf e3 ex (sp),hl 33d0 dc5333 call c,$3353 33d3 d1 pop de 33d4 da0436 jp c,$3604 33d7 c9 ret ;; REAL arctan 33d8 cd2737 call $3727 33db f5 push af 33dc fc3437 call m,$3734 33df 06f0 ld b,$f0 33e1 cd9234 call $3492 33e4 304a jr nc,$3430 ; (+$4a) 33e6 3d dec a 33e7 f5 push af 33e8 f4fb35 call p,$35fb 33eb cd4034 call $3440 33ee 0b dec bc 33ef ff rst $38 33f0 c1 pop bc 33f1 03 inc bc 33f2 0f rrca 33f3 77 ld (hl),a 33f4 83 add a,e 33f5 fce8eb call m,$ebe8 33f8 79 ld a,c 33f9 6f ld l,a 33fa ca7836 jp z,$3678 33fd 7b ld a,e 33fe d5 push de 33ff 3eb0 ld a,$b0 3401 b5 or l 3402 7c ld a,h 3403 b0 or b 3404 c1 pop bc 3405 8b adc a,e 3406 09 add hl,bc 3407 7d ld a,l 3408 af xor a 3409 e8 ret pe 340a 32b47d ld ($7db4),a 340d 74 ld (hl),h 340e 6c ld l,h 340f 65 ld h,l 3410 62 ld h,d 3411 7d ld a,l 3412 d1 pop de 3413 f5 push af 3414 37 scf 3415 92 sub d 3416 7e ld a,(hl) 3417 7a ld a,d 3418 c3cb4c jp $4ccb 341b 7e ld a,(hl) 341c 83 add a,e 341d a7 and a 341e aa xor d 341f aa xor d 3420 7f ld a,a 3421 feff cp $ff 3423 ff rst $38 3424 7f ld a,a 3425 80 add a,b 3426 cd7735 call $3577 3429 f1 pop af 342a 119c33 ld de,$339c 342d f49e34 call p,$349e 3430 3a13b1 ld a,($b113) 3433 b7 or a 3434 11c333 ld de,$33c3 3437 c47735 call nz,$3577 343a f1 pop af 343b fc3437 call m,$3734 343e 37 scf 343f c9 ret 3440 cd7035 call $3570 3443 cd872f call $2f87 3446 e1 pop hl 3447 46 ld b,(hl) 3448 23 inc hl 3449 cd902f call $2f90 344c 13 inc de 344d 13 inc de 344e 13 inc de 344f 13 inc de 3450 13 inc de 3451 d5 push de 3452 1109b1 ld de,$b109 3455 05 dec b 3456 c8 ret z 3457 c5 push bc 3458 110eb1 ld de,$b10e 345b cd7735 call $3577 345e c1 pop bc 345f d1 pop de 3460 d5 push de 3461 c5 push bc 3462 cda234 call $34a2 3465 c1 pop bc 3466 d1 pop de 3467 18e3 jr $344c ; (-$1d) 3469 af xor a 346a f5 push af 346b cd7735 call $3577 346e f1 pop af 346f 116b32 ld de,$326b 3472 c4a234 call nz,$34a2 3475 e5 push hl 3476 cdd92f call $2fd9 3479 3013 jr nc,$348e ; (+$13) 347b d1 pop de 347c e5 push hl 347d f5 push af 347e d5 push de 347f 1109b1 ld de,$b109 3482 cd9f2f call $2f9f 3485 eb ex de,hl 3486 e1 pop hl 3487 cd9a34 call $349a 348a f1 pop af 348b d1 pop de 348c 37 scf 348d c9 ret 348e e1 pop hl 348f af xor a 3490 3c inc a 3491 c9 ret 3492 cdd336 call $36d3 3495 f0 ret p 3496 b8 cp b 3497 c8 ret z 3498 3f ccf 3499 c9 ret 349a 3e01 ld a,$01 349c 1805 jr $34a3 ; (+$05) ;; REAL reverse subtract 349e 3e80 ld a,$80 34a0 1801 jr $34a3 ; (+$01) ;; REAL addition 34a2 af xor a 34a3 e5 push hl 34a4 dde1 pop ix 34a6 d5 push de 34a7 fde1 pop iy 34a9 dd4603 ld b,(ix+$03) 34ac fd4e03 ld c,(iy+$03) 34af b7 or a 34b0 280a jr z,$34bc ; (+$0a) 34b2 faba34 jp m,$34ba 34b5 0f rrca 34b6 a9 xor c 34b7 4f ld c,a 34b8 1802 jr $34bc ; (+$02) 34ba a8 xor b 34bb 47 ld b,a 34bc dd7e04 ld a,(ix+$04) 34bf fdbe04 cp (iy+$04) 34c2 3014 jr nc,$34d8 ; (+$14) 34c4 50 ld d,b 34c5 41 ld b,c 34c6 4a ld c,d 34c7 b7 or a 34c8 57 ld d,a 34c9 fd7e04 ld a,(iy+$04) 34cc dd7704 ld (ix+$04),a 34cf 2854 jr z,$3525 ; (+$54) 34d1 92 sub d 34d2 fe21 cp $21 34d4 304f jr nc,$3525 ; (+$4f) 34d6 1811 jr $34e9 ; (+$11) 34d8 af xor a 34d9 fd9604 sub (iy+$04) 34dc 2859 jr z,$3537 ; (+$59) 34de dd8604 add a,(ix+$04) 34e1 fe21 cp $21 34e3 3052 jr nc,$3537 ; (+$52) 34e5 e5 push hl 34e6 fde1 pop iy 34e8 eb ex de,hl 34e9 5f ld e,a 34ea 78 ld a,b 34eb a9 xor c 34ec f5 push af 34ed c5 push bc 34ee 7b ld a,e 34ef cd4337 call $3743 34f2 79 ld a,c 34f3 c1 pop bc 34f4 4f ld c,a 34f5 f1 pop af 34f6 fa3c35 jp m,$353c 34f9 fd7e00 ld a,(iy+$00) 34fc 85 add a,l 34fd 6f ld l,a 34fe fd7e01 ld a,(iy+$01) 3501 8c adc a,h 3502 67 ld h,a 3503 fd7e02 ld a,(iy+$02) 3506 8b adc a,e 3507 5f ld e,a 3508 fd7e03 ld a,(iy+$03) 350b cbff set 7,a 350d 8a adc a,d 350e 57 ld d,a 350f d2b737 jp nc,$37b7 3512 cb1a rr d 3514 cb1b rr e 3516 cb1c rr h 3518 cb1d rr l 351a cb19 rr c 351c dd3404 inc (ix+$04) 351f c2b737 jp nz,$37b7 3522 c3ea37 jp $37ea 3525 fd7e02 ld a,(iy+$02) 3528 dd7702 ld (ix+$02),a 352b fd7e01 ld a,(iy+$01) 352e dd7701 ld (ix+$01),a 3531 fd7e00 ld a,(iy+$00) 3534 dd7700 ld (ix+$00),a 3537 dd7003 ld (ix+$03),b 353a 37 scf 353b c9 ret 353c af xor a 353d 91 sub c 353e 4f ld c,a 353f fd7e00 ld a,(iy+$00) 3542 9d sbc a,l 3543 6f ld l,a 3544 fd7e01 ld a,(iy+$01) 3547 9c sbc a,h 3548 67 ld h,a 3549 fd7e02 ld a,(iy+$02) 354c 9b sbc a,e 354d 5f ld e,a 354e fd7e03 ld a,(iy+$03) 3551 cbff set 7,a 3553 9a sbc a,d 3554 57 ld d,a 3555 3016 jr nc,$356d ; (+$16) 3557 78 ld a,b 3558 2f cpl 3559 47 ld b,a 355a af xor a 355b 91 sub c 355c 4f ld c,a 355d 3e00 ld a,$00 355f 9d sbc a,l 3560 6f ld l,a 3561 3e00 ld a,$00 3563 9c sbc a,h 3564 67 ld h,a 3565 3e00 ld a,$00 3567 9b sbc a,e 3568 5f ld e,a 3569 3e00 ld a,$00 356b 9a sbc a,d 356c 57 ld d,a 356d c3ac37 jp $37ac 3570 1109b1 ld de,$b109 3573 cd902f call $2f90 3576 eb ex de,hl ;; REAL multiplication 3577 d5 push de 3578 fde1 pop iy 357a e5 push hl 357b dde1 pop ix 357d fd7e04 ld a,(iy+$04) 3580 b7 or a 3581 282a jr z,$35ad ; (+$2a) 3583 3d dec a 3584 cdaf36 call $36af 3587 2824 jr z,$35ad ; (+$24) 3589 301f jr nc,$35aa ; (+$1f) 358b f5 push af 358c c5 push bc 358d cdb035 call $35b0 3590 79 ld a,c 3591 c1 pop bc 3592 4f ld c,a 3593 f1 pop af 3594 cb7a bit 7,d 3596 200b jr nz,$35a3 ; (+$0b) 3598 3d dec a 3599 2812 jr z,$35ad ; (+$12) 359b cb21 sla c 359d ed6a adc hl,hl 359f cb13 rl e 35a1 cb12 rl d 35a3 dd7704 ld (ix+$04),a 35a6 b7 or a 35a7 c2b737 jp nz,$37b7 35aa c3ea37 jp $37ea 35ad c3e237 jp $37e2 35b0 210000 ld hl,$0000 35b3 5d ld e,l 35b4 54 ld d,h 35b5 fd7e00 ld a,(iy+$00) 35b8 cdf335 call $35f3 35bb fd7e01 ld a,(iy+$01) 35be cdf335 call $35f3 35c1 fd7e02 ld a,(iy+$02) 35c4 cdf335 call $35f3 35c7 fd7e03 ld a,(iy+$03) 35ca f680 or $80 35cc 0608 ld b,$08 35ce 1f rra 35cf 4f ld c,a 35d0 3014 jr nc,$35e6 ; (+$14) 35d2 7d ld a,l 35d3 dd8600 add a,(ix+$00) 35d6 6f ld l,a 35d7 7c ld a,h 35d8 dd8e01 adc a,(ix+$01) 35db 67 ld h,a 35dc 7b ld a,e 35dd dd8e02 adc a,(ix+$02) 35e0 5f ld e,a 35e1 7a ld a,d 35e2 dd8e03 adc a,(ix+$03) 35e5 57 ld d,a 35e6 cb1a rr d 35e8 cb1b rr e 35ea cb1c rr h 35ec cb1d rr l 35ee cb19 rr c 35f0 10de djnz $35d0 ; (-$22) 35f2 c9 ret 35f3 b7 or a 35f4 20d6 jr nz,$35cc ; (-$2a) 35f6 6c ld l,h 35f7 63 ld h,e 35f8 5a ld e,d 35f9 57 ld d,a 35fa c9 ret 35fb cd872f call $2f87 35fe eb ex de,hl 35ff d5 push de 3600 cd7d2f call $2f7d 3603 d1 pop de 3604 d5 push de 3605 fde1 pop iy 3607 e5 push hl 3608 dde1 pop ix 360a af xor a 360b fd9604 sub (iy+$04) 360e 285a jr z,$366a ; (+$5a) 3610 cdaf36 call $36af 3613 cae237 jp z,$37e2 3616 304f jr nc,$3667 ; (+$4f) 3618 c5 push bc 3619 4f ld c,a 361a 5e ld e,(hl) 361b 23 inc hl 361c 56 ld d,(hl) 361d 23 inc hl 361e 7e ld a,(hl) 361f 23 inc hl 3620 66 ld h,(hl) 3621 6f ld l,a 3622 eb ex de,hl 3623 fd4603 ld b,(iy+$03) 3626 cbf8 set 7,b 3628 cd9d36 call $369d 362b 3806 jr c,$3633 ; (+$06) 362d 79 ld a,c 362e b7 or a 362f 2008 jr nz,$3639 ; (+$08) 3631 1833 jr $3666 ; (+$33) 3633 0d dec c 3634 29 add hl,hl 3635 cb13 rl e 3637 cb12 rl d 3639 dd7104 ld (ix+$04),c 363c cd7236 call $3672 363f dd7103 ld (ix+$03),c 3642 cd7236 call $3672 3645 dd7102 ld (ix+$02),c 3648 cd7236 call $3672 364b dd7101 ld (ix+$01),c 364e cd7236 call $3672 3651 3f ccf 3652 dc9d36 call c,$369d 3655 3f ccf 3656 9f sbc a,a 3657 69 ld l,c 3658 dd6601 ld h,(ix+$01) 365b dd5e02 ld e,(ix+$02) 365e dd5603 ld d,(ix+$03) 3661 c1 pop bc 3662 4f ld c,a 3663 c3b737 jp $37b7 3666 c1 pop bc 3667 c3ea37 jp $37ea 366a dd4603 ld b,(ix+$03) 366d cdea37 call $37ea 3670 af xor a 3671 c9 ret 3672 0e01 ld c,$01 3674 3808 jr c,$367e ; (+$08) 3676 7a ld a,d 3677 b8 cp b 3678 cca036 call z,$36a0 367b 3f ccf 367c 3013 jr nc,$3691 ; (+$13) 367e 7d ld a,l 367f fd9600 sub (iy+$00) 3682 6f ld l,a 3683 7c ld a,h 3684 fd9e01 sbc a,(iy+$01) 3687 67 ld h,a 3688 7b ld a,e 3689 fd9e02 sbc a,(iy+$02) 368c 5f ld e,a 368d 7a ld a,d 368e 98 sbc a,b 368f 57 ld d,a 3690 37 scf 3691 cb11 rl c 3693 9f sbc a,a 3694 29 add hl,hl 3695 cb13 rl e 3697 cb12 rl d 3699 3c inc a 369a 20d8 jr nz,$3674 ; (-$28) 369c c9 ret 369d 7a ld a,d 369e b8 cp b 369f c0 ret nz 36a0 7b ld a,e 36a1 fdbe02 cp (iy+$02) 36a4 c0 ret nz 36a5 7c ld a,h 36a6 fdbe01 cp (iy+$01) 36a9 c0 ret nz 36aa 7d ld a,l 36ab fdbe00 cp (iy+$00) 36ae c9 ret 36af 4f ld c,a 36b0 dd7e03 ld a,(ix+$03) 36b3 fdae03 xor (iy+$03) 36b6 47 ld b,a 36b7 dd7e04 ld a,(ix+$04) 36ba b7 or a 36bb c8 ret z 36bc 81 add a,c 36bd 4f ld c,a 36be 1f rra 36bf a9 xor c 36c0 79 ld a,c 36c1 f2cf36 jp p,$36cf 36c4 ddcb03fe set 7,(ix+$03) 36c8 d67f sub $7f 36ca 37 scf 36cb c0 ret nz 36cc fe01 cp $01 36ce c9 ret 36cf b7 or a 36d0 f8 ret m 36d1 af xor a 36d2 c9 ret 36d3 e5 push hl 36d4 dde1 pop ix 36d6 dd7e04 ld a,(ix+$04) 36d9 b7 or a 36da c8 ret z 36db d680 sub $80 36dd 37 scf 36de c9 ret 36df e5 push hl 36e0 dde1 pop ix 36e2 d5 push de 36e3 fde1 pop iy 36e5 dd7e04 ld a,(ix+$04) 36e8 fdbe04 cp (iy+$04) 36eb 382c jr c,$3719 ; (+$2c) 36ed 2033 jr nz,$3722 ; (+$33) 36ef b7 or a 36f0 c8 ret z 36f1 dd7e03 ld a,(ix+$03) 36f4 fdae03 xor (iy+$03) 36f7 fa2237 jp m,$3722 36fa dd7e03 ld a,(ix+$03) 36fd fd9603 sub (iy+$03) 3700 2017 jr nz,$3719 ; (+$17) 3702 dd7e02 ld a,(ix+$02) 3705 fd9602 sub (iy+$02) 3708 200f jr nz,$3719 ; (+$0f) 370a dd7e01 ld a,(ix+$01) 370d fd9601 sub (iy+$01) 3710 2007 jr nz,$3719 ; (+$07) 3712 dd7e00 ld a,(ix+$00) 3715 fd9600 sub (iy+$00) 3718 c8 ret z 3719 9f sbc a,a 371a fdae03 xor (iy+$03) 371d 87 add a,a 371e 9f sbc a,a 371f d8 ret c 3720 3c inc a 3721 c9 ret 3722 dd7e03 ld a,(ix+$03) 3725 18f6 jr $371d ; (-$0a) 3727 e5 push hl 3728 dde1 pop ix 372a dd7e04 ld a,(ix+$04) 372d b7 or a 372e c8 ret z 372f 18f1 jr $3722 ; (-$0f) 3731 e5 push hl 3732 dde1 pop ix 3734 dd7e03 ld a,(ix+$03) 3737 ee80 xor $80 3739 dd7703 ld (ix+$03),a 373c c9 ret 373d fe21 cp $21 373f 3802 jr c,$3743 ; (+$02) 3741 3e21 ld a,$21 3743 5e ld e,(hl) 3744 23 inc hl 3745 56 ld d,(hl) 3746 23 inc hl 3747 4e ld c,(hl) 3748 23 inc hl 3749 66 ld h,(hl) 374a 69 ld l,c 374b eb ex de,hl 374c cbfa set 7,d 374e 010000 ld bc,$0000 3751 180b jr $375e ; (+$0b) 3753 4f ld c,a 3754 78 ld a,b 3755 b5 or l 3756 47 ld b,a 3757 79 ld a,c 3758 4d ld c,l 3759 6c ld l,h 375a 63 ld h,e 375b 5a ld e,d 375c 1600 ld d,$00 375e d608 sub $08 3760 30f1 jr nc,$3753 ; (-$0f) 3762 c608 add a,$08 3764 c8 ret z 3765 cb3a srl d 3767 cb1b rr e 3769 cb1c rr h 376b cb1d rr l 376d cb19 rr c 376f 3d dec a 3770 20f3 jr nz,$3765 ; (-$0d) 3772 c9 ret 3773 2017 jr nz,$378c ; (+$17) 3775 57 ld d,a 3776 7b ld a,e 3777 b4 or h 3778 b5 or l 3779 b1 or c 377a c8 ret z 377b 7a ld a,d 377c d608 sub $08 377e 381a jr c,$379a ; (+$1a) 3780 c8 ret z 3781 53 ld d,e 3782 5c ld e,h 3783 65 ld h,l 3784 69 ld l,c 3785 0e00 ld c,$00 3787 14 inc d 3788 15 dec d 3789 28f1 jr z,$377c ; (-$0f) 378b f8 ret m 378c 3d dec a 378d c8 ret z 378e cb21 sla c 3790 ed6a adc hl,hl 3792 cb13 rl e 3794 cb12 rl d 3796 f28c37 jp p,$378c 3799 c9 ret 379a af xor a 379b c9 ret 379c e5 push hl 379d dde1 pop ix 379f dd7004 ld (ix+$04),b 37a2 47 ld b,a 37a3 5e ld e,(hl) 37a4 23 inc hl 37a5 56 ld d,(hl) 37a6 23 inc hl 37a7 7e ld a,(hl) 37a8 23 inc hl 37a9 66 ld h,(hl) 37aa 6f ld l,a 37ab eb ex de,hl 37ac dd7e04 ld a,(ix+$04) 37af 15 dec d 37b0 14 inc d 37b1 f47337 call p,$3773 37b4 dd7704 ld (ix+$04),a 37b7 cb21 sla c 37b9 3012 jr nc,$37cd ; (+$12) 37bb 2c inc l 37bc 200f jr nz,$37cd ; (+$0f) 37be 24 inc h 37bf 200c jr nz,$37cd ; (+$0c) 37c1 13 inc de 37c2 7a ld a,d 37c3 b3 or e 37c4 2007 jr nz,$37cd ; (+$07) 37c6 dd3404 inc (ix+$04) 37c9 281f jr z,$37ea ; (+$1f) 37cb 1680 ld d,$80 37cd 78 ld a,b 37ce f67f or $7f 37d0 a2 and d 37d1 dd7703 ld (ix+$03),a 37d4 dd7302 ld (ix+$02),e 37d7 dd7401 ld (ix+$01),h 37da dd7500 ld (ix+$00),l 37dd dde5 push ix 37df e1 pop hl 37e0 37 scf 37e1 c9 ret 37e2 af xor a 37e3 dd7704 ld (ix+$04),a 37e6 18f5 jr $37dd ; (-$0b) 37e8 0600 ld b,$00 37ea dde5 push ix 37ec e1 pop hl 37ed 78 ld a,b 37ee f67f or $7f 37f0 dd7703 ld (ix+$03),a 37f3 f6ff or $ff 37f5 dd7704 ld (ix+$04),a 37f8 77 ld (hl),a 37f9 dd7701 ld (ix+$01),a 37fc dd7702 ld (ix+$02),a 37ff c9 ret ;; font graphics 3800 -------------------------- ;; character 0 ;; defb %11111111 defb %11000011 defb %11000011 defb %11000011 defb %11000011 defb %11000011 defb %11000011 defb %11111111 -------------------------- ;; character 1 ;; defb %11111111 defb %11000000 defb %11000000 defb %11000000 defb %11000000 defb %11000000 defb %11000000 defb %11000000 -------------------------- ;; character 2 ;; defb %00011000 defb %00011000 defb %00011000 defb %00011000 defb %00011000 defb %00011000 defb %00011000 defb %11111111 -------------------------- ;; character 3 ;; defb %00000011 defb %00000011 defb %00000011 defb %00000011 defb %00000011 defb %00000011 defb %00000011 defb %11111111 -------------------------- ;; character 4 ;; defb %00001100 defb %00011000 defb %00110000 defb %01111110 defb %00001100 defb %00011000 defb %00110000 defb %00000000 -------------------------- ;; character 5 ;; defb %11111111 defb %11000011 defb %11100111 defb %11011011 defb %11011011 defb %11100111 defb %11000011 defb %11111111 -------------------------- ;; character 6 ;; defb %00000000 defb %00000001 defb %00000011 defb %00000110 defb %11001100 defb %01111000 defb %00110000 defb %00000000 -------------------------- ;; character 7 ;; defb %00111100 defb %01100110 defb %11000011 defb %11000011 defb %11111111 defb %00100100 defb %11100111 defb %00000000 -------------------------- ;; character 8 ;; defb %00000000 defb %00000000 defb %00110000 defb %01100000 defb %11111111 defb %01100000 defb %00110000 defb %00000000 -------------------------- ;; character 9 ;; defb %00000000 defb %00000000 defb %00001100 defb %00000110 defb %11111111 defb %00000110 defb %00001100 defb %00000000 -------------------------- ;; character 10 ;; defb %00011000 defb %00011000 defb %00011000 defb %00011000 defb %11011011 defb %01111110 defb %00111100 defb %00011000 -------------------------- ;; character 11 ;; defb %00011000 defb %00111100 defb %01111110 defb %11011011 defb %00011000 defb %00011000 defb %00011000 defb %00011000 -------------------------- ;; character 12 ;; defb %00011000 defb %01011010 defb %00111100 defb %10011001 defb %11011011 defb %01111110 defb %00111100 defb %00011000 -------------------------- ;; character 13 ;; defb %00000000 defb %00000011 defb %00110011 defb %01100011 defb %11111110 defb %01100000 defb %00110000 defb %00000000 -------------------------- ;; character 14 ;; defb %00111100 defb %01100110 defb %11111111 defb %11011011 defb %11011011 defb %11111111 defb %01100110 defb %00111100 -------------------------- ;; 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