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fdcfcd44 L |
1 | ; Z80 emulator with CP/M support. The Z80-specific instructions themselves actually aren't |
2 | ; implemented yet, making this more of an i8080 emulator. | |
3 | ; | |
4 | ; Copyright (C) 2010 Sprite_tm | |
5 | ; | |
6 | ; This program is free software: you can redistribute it and/or modify | |
7 | ; it under the terms of the GNU General Public License as published by | |
8 | ; the Free Software Foundation, either version 3 of the License, or | |
9 | ; (at your option) any later version. | |
10 | ; | |
11 | ; This program is distributed in the hope that it will be useful, | |
12 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ; GNU General Public License for more details. | |
15 | ; | |
16 | ; You should have received a copy of the GNU General Public License | |
17 | ; along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | ||
29c45e41 | 19 | ;.nolist |
3c3744f1 L |
20 | #if defined atmega8 |
21 | .include "m8def.inc" | |
37617bd8 | 22 | #elif defined atmega168 |
2284d51d | 23 | .include "m168def.inc" |
3c3744f1 L |
24 | #else /* default */ |
25 | .include "m88def.inc" | |
26 | ;FUSE_H=0xDF | |
27 | ;FUSE_L=0xF7 | |
28 | #endif | |
37617bd8 | 29 | .list |
2284d51d | 30 | .listmac |
37617bd8 L |
31 | |
32 | #ifndef DRAM_DQ_ORDER /* If this is set to 1, the portbits */ | |
33 | #define DRAM_DQ_ORDER 0 /* for DRAM D1 and WE are swapped. */ | |
34 | #endif | |
35 | ||
3c3744f1 L |
36 | |
37 | #ifndef F_CPU | |
38 | #define F_CPU 20000000 /* system clock in Hz; defaults to 20MHz */ | |
39 | #endif | |
40 | #ifndef BAUD | |
41 | #define BAUD 38400 /* console baud rate */ | |
42 | #endif | |
43 | ||
3c3744f1 | 44 | |
37617bd8 L |
45 | #define UBRR_VAL ((F_CPU+BAUD*8)/(BAUD*16)-1) /* clever rounding */ |
46 | ||
47 | #define RXBUFSIZE 64 /* USART recieve buffer size. Must be power of 2 */ | |
48 | ||
49 | #define REFR_RATE 64000 /* dram refresh rate in cycles/s. */ | |
50 | /* Most drams need 1/15.6µs. */ | |
3c3744f1 L |
51 | #define REFR_PRE 8 /* timer prescale factor */ |
52 | #define REFR_CS 0x02 /* timer clock select for 1/8 */ | |
53 | #define REFR_CNT F_CPU / REFR_RATE / REFR_PRE | |
54 | ||
55 | ||
56 | #if defined __ATmega8__ | |
57 | .equ refr_vect = OC2addr | |
58 | #else | |
59 | .equ refr_vect = OC2Aaddr | |
60 | #endif | |
61 | ||
db568140 | 62 | #define DRAM_WORD_ACCESS 0 /* experimental */ |
fdcfcd44 | 63 | |
db568140 | 64 | #define EM_Z80 0 /* we don't have any z80 instructions yet */ |
37617bd8 | 65 | |
64f220e6 L |
66 | .equ MMC_DEBUG = 0 |
67 | .equ INS_DEBUG = 0 | |
37617bd8 L |
68 | .equ MEMTEST = 1 |
69 | .equ BOOTWAIT = 1 | |
64f220e6 L |
70 | .equ PORT_DEBUG = 0 |
71 | .equ DISK_DEBUG = 0 | |
72 | .equ MEMFILL_CB = 1 | |
73 | .equ STACK_DBG = 0 | |
74 | .equ PRINT_PC = 0 | |
fdcfcd44 L |
75 | |
76 | ;Port declarations | |
77 | ||
78 | ; Port D | |
64f220e6 L |
79 | .equ rxd = 0 |
80 | .equ txd = 1 | |
81 | .equ ram_oe = 2 | |
82 | .equ ram_a8 = 3 | |
83 | .equ mmc_cs = 4 | |
84 | .equ ram_a5 = 5 | |
85 | .equ ram_a6 = 6 | |
86 | .equ ram_a7 = 7 | |
fdcfcd44 | 87 | |
ebf7dfab L |
88 | .equ P_OE = PORTD |
89 | .equ P_AH = PORTD | |
90 | .equ P_A8 = PORTD | |
91 | .equ P_MMC_CS = PORTD | |
92 | ; ram_a[7..5] | |
93 | .equ RAM_AH_MASK = (1<<ram_a8)|(1<<ram_a7)|(1<<ram_a6)|(1<<ram_a5) | |
94 | .equ PD_OUTPUT_MASK = (1<<mmc_cs) | (1<<ram_oe) | RAM_AH_MASK | |
37617bd8 | 95 | |
3c3744f1 | 96 | |
fdcfcd44 | 97 | ;Port B |
37617bd8 L |
98 | .equ ram_a4 = 0 |
99 | .equ ram_a3 = 1 | |
100 | .equ ram_a2 = 2 | |
101 | .equ ram_a1 = 3 | |
102 | .equ mmc_mosi = 3 | |
103 | .equ ram_a0 = 4 | |
104 | .equ mmc_miso = 4 | |
105 | .equ ram_ras = 5 | |
106 | .equ mmc_sck = 5 | |
ebf7dfab | 107 | |
37617bd8 | 108 | |
db568140 | 109 | .equ P_RAS = PORTB |
ebf7dfab L |
110 | .equ P_AL = PORTB |
111 | ; ram_a[4..0] | |
112 | .equ RAM_AL_MASK = (1<<ram_a4)|(1<<ram_a3)|(1<<ram_a2)|(1<<ram_a1)|(1<<ram_a0) | |
113 | .equ PB_OUTPUT_MASK = (1<<ram_ras) | RAM_AL_MASK | |
fdcfcd44 L |
114 | |
115 | ;Port C | |
37617bd8 L |
116 | #if DRAM_DQ_ORDER == 1 |
117 | .equ ram_d1 = 1 | |
118 | .equ ram_w = 4 | |
119 | #else /* original */ | |
120 | .equ ram_d1 = 4 | |
121 | .equ ram_w = 1 | |
122 | #endif | |
123 | .equ ram_d0 = 0 | |
124 | .equ ram_d2 = 2 | |
125 | .equ ram_d3 = 3 | |
fdcfcd44 | 126 | .equ ram_cas= 5 |
ebf7dfab L |
127 | |
128 | .equ P_DQ = PORTC | |
2284d51d L |
129 | .equ P_W = PORTC |
130 | .equ P_CAS = PORTC | |
37617bd8 L |
131 | .equ RAM_DQ_MASK = (1<<ram_d3)|(1<<ram_d2)|(1<<ram_d1)|(1<<ram_d0) |
132 | .equ PC_OUTPUT_MASK = (1<<ram_cas)|(1<<ram_w) | |
133 | ||
fdcfcd44 L |
134 | |
135 | ;Flag bits in z_flags | |
136 | .equ ZFL_S = 7 | |
137 | .equ ZFL_Z = 6 | |
138 | .equ ZFL_H = 4 | |
139 | .equ ZFL_P = 2 | |
140 | .equ ZFL_N = 1 | |
141 | .equ ZFL_C = 0 | |
142 | ||
db568140 L |
143 | ;Register definitions |
144 | .undef xl ;r26 | |
145 | .undef xh ;r27 | |
146 | ||
147 | .def _tmp = r0 ; 0 | |
148 | .def _0 = r1 | |
149 | ||
150 | .def z_c = r4 | |
151 | .def z_b = r5 | |
152 | .def z_e = r6 | |
153 | .def z_d = r7 | |
154 | .def z_l = r8 | |
155 | .def z_h = r9 | |
156 | .def z_a = r10 | |
157 | ||
158 | .def insdecl = r12 ; | |
159 | .def insdech = r13 ; | |
160 | .def z_spl = r14 | |
161 | .def z_sph = r15 ; | |
162 | .def temp = r16 ; | |
163 | .def temp2 = r17 ; | |
164 | .def temp3 = r18 | |
165 | .def temp4 = r19 | |
166 | .def z_flags = r20 ; | |
167 | ; | |
168 | .def opl = r22 ; | |
169 | .def oph = r23 ; | |
170 | .def z_pcl = r24 ; | |
171 | .def z_pch = r25 ; | |
172 | .def adrl = r26 ; | |
173 | .def adrh = r27 ; | |
174 | ; yl ;r28 | |
175 | ; yh ;r29 | |
176 | ; zl ;r30 ; | |
177 | ; zh ;r31 ; | |
178 | ||
179 | ||
180 | #if 0 | |
fdcfcd44 | 181 | ;Register definitions |
99ed7199 L |
182 | .def _tmp = r0 ; 0 |
183 | .def _0 = r1 | |
184 | ;.def z_a = r2 | |
64f220e6 L |
185 | .def z_b = r3 |
186 | .def z_c = r4 | |
187 | .def z_d = r5 | |
188 | .def z_e = r6 | |
189 | .def z_l = r7 | |
190 | .def z_h = r8 | |
99ed7199 L |
191 | ;.def z_spl = r9 |
192 | ;.def z_sph = r10 | |
99ed7199 | 193 | .def z_a = r11 |
99ed7199 L |
194 | .def _wl = r12 |
195 | .def _wh = r13 | |
196 | .def z_spl = r14 | |
197 | .def z_sph = r15 ; | |
198 | .def temp = r16 ; | |
199 | .def temp2 = r17 ; | |
200 | .def temp3 = r18 | |
201 | .def temp4 = r19 | |
202 | .def z_flags = r20 ; | |
203 | .def trace = r21 ; | |
204 | .def insdecl = r22 ; | |
205 | .def insdech = r23 ; | |
206 | .def z_pcl = r24 ; | |
207 | .def z_pch = r25 ; | |
208 | .undef xl ;r26 | |
209 | .undef xh ;r27 | |
210 | .undef yl ;r28 | |
211 | .undef yh ;r29 | |
212 | .def opl = r26 ; | |
213 | .def oph = r27 ; | |
214 | .def adrl = r28 ; | |
215 | .def adrh = r29 ; | |
216 | ; zl ;r30 ; | |
217 | ; zh ;r31 ; | |
db568140 | 218 | #endif |
fdcfcd44 | 219 | |
db568140 L |
220 | #if defined __ATmega8__ |
221 | .equ flags = TWBR | |
222 | #else | |
223 | .equ flags = GPIOR0 | |
224 | #endif | |
225 | ||
226 | .equ hostact = 7 ;host active flag | |
227 | .equ hostwrt = 6 ;host written flag | |
228 | .equ rsflag = 5 ;read sector flag | |
229 | .equ readop = 4 ;1 if read operation | |
230 | .equ trace = 0 | |
fdcfcd44 | 231 | |
37617bd8 L |
232 | ; This is the base z80 port address for clock access |
233 | #define TIMERPORT 0x40 | |
234 | #define TIMER_CTL TIMERPORT | |
235 | #define TIMER_MSECS TIMERPORT+1 | |
236 | #define TIMER_SECS TIMER_MSECS+2 | |
237 | ||
238 | #define starttimercmd 1 | |
239 | #define quitTimerCmd 2 | |
240 | #define printTimerCmd 15 | |
241 | #define uptimeCmd 16 | |
242 | ||
243 | ||
244 | ||
3c3744f1 | 245 | .cseg |
fdcfcd44 L |
246 | .org 0 |
247 | rjmp start ; reset vector | |
3c3744f1 | 248 | .org refr_vect |
37617bd8 L |
249 | rjmp refrint ; tim2cmpa |
250 | .org OC1Aaddr ; Timer/Counter1 Compare Match A | |
251 | rjmp sysclockint ; 1ms system timer | |
252 | .org URXCaddr | |
253 | rjmp rxint ; USART receive int. | |
254 | ;.org UDREaddr | |
255 | ; rjmp txint | |
256 | ||
3c3744f1 | 257 | .org INT_VECTORS_SIZE |
37617bd8 | 258 | |
fdcfcd44 L |
259 | start: |
260 | ldi temp,low(RAMEND) ; top of memory | |
261 | out SPL,temp ; init stack pointer | |
262 | ldi temp,high(RAMEND) ; top of memory | |
263 | out SPH,temp ; init stack pointer | |
264 | ||
265 | ; - Kill wdt | |
266 | wdr | |
3c3744f1 | 267 | #if defined __ATmega8__ |
99ed7199 | 268 | out MCUCSR,_0 |
3c3744f1 L |
269 | |
270 | ldi temp,(1<<WDCE) | (1<<WDE) | |
271 | out WDTCSR,temp | |
272 | ldi temp,(1<<WDCE) | |
273 | out WDTCSR,temp | |
99ed7199 L |
274 | ldi temp,(1<<PUD) ;disable pullups |
275 | out SFIOR,temp | |
3c3744f1 | 276 | #else |
99ed7199 | 277 | out MCUSR,_0 |
3c3744f1 L |
278 | |
279 | ldi temp,(1<<WDCE) | (1<<WDE) | |
fdcfcd44 | 280 | sts WDTCSR,temp |
3c3744f1 | 281 | ldi temp,(1<<WDCE) |
fdcfcd44 | 282 | sts WDTCSR,temp |
99ed7199 L |
283 | ldi temp,(1<<PUD) ;disable pullups |
284 | out MCUCR,temp | |
3c3744f1 | 285 | #endif |
fdcfcd44 L |
286 | |
287 | ; - Setup Ports | |
37617bd8 | 288 | ldi temp,PB_OUTPUT_MASK |
fdcfcd44 | 289 | out DDRB,temp |
37617bd8 | 290 | ldi temp,PD_OUTPUT_MASK |
fdcfcd44 | 291 | out DDRD,temp |
37617bd8 | 292 | ldi temp,PC_OUTPUT_MASK |
fdcfcd44 L |
293 | out DDRC,temp |
294 | ||
ebf7dfab L |
295 | sbi P_W,ram_w |
296 | sbi P_CAS,ram_cas | |
297 | sbi P_RAS,ram_ras | |
298 | sbi P_OE,ram_oe | |
299 | sbi P_MMC_CS,mmc_cs | |
fdcfcd44 L |
300 | |
301 | ||
302 | ; - Init serial port | |
37617bd8 | 303 | |
99ed7199 L |
304 | sts rxcount,_0 ; reset receive buffer |
305 | sts rxidx_r,_0 | |
306 | sts rxidx_w,_0 | |
37617bd8 L |
307 | |
308 | ||
3c3744f1 | 309 | #if defined __ATmega8__ |
37617bd8 | 310 | ldi temp, (1<<TXEN) | (1<<RXEN) | (1<<RXCIE) |
3c3744f1 L |
311 | out UCSRB,temp |
312 | ldi temp, (1<<URSEL) | (1<<UCSZ1) | (1<<UCSZ0) | |
313 | out UCSRC,temp | |
314 | ldi temp, HIGH(UBRR_VAL) | |
315 | out UBRRH,temp | |
316 | ldi temp, LOW(UBRR_VAL) | |
317 | out UBRRL,temp | |
318 | #else | |
37617bd8 | 319 | ldi temp, (1<<TXEN0) | (1<<RXEN0) | (1<<RXCIE0) |
3c3744f1 L |
320 | sts UCSR0B,temp |
321 | ldi temp, (1<<UCSZ01) | (1<<UCSZ00) | |
322 | sts UCSR0C,temp | |
323 | ldi temp, HIGH(UBRR_VAL) | |
324 | sts UBRR0H,temp | |
325 | ldi temp, LOW(UBRR_VAL) | |
326 | sts UBRR0L,temp | |
327 | #endif | |
fdcfcd44 L |
328 | |
329 | ;Init timer2. Refresh-call should happen every (8ms/512)=312 cycles. | |
3c3744f1 L |
330 | |
331 | #ifdef __ATmega8__ | |
37617bd8 | 332 | ldi temp,REFR_CNT*2 ; 2 cycles per int |
3c3744f1 L |
333 | out OCR2,temp |
334 | ldi temp,(1<<WGM21) | REFR_CS ;CTC, clk/REFR_PRE | |
335 | out TCCR2,temp | |
336 | ldi temp, (1<<OCIE2) | |
337 | out TIMSK,temp | |
338 | #else | |
37617bd8 | 339 | ldi temp,REFR_CNT ;=312 cycles |
3c3744f1 L |
340 | sts OCR2A,temp |
341 | ldi temp, (1<<WGM21) | |
342 | sts TCCR2A,temp | |
343 | ldi temp, REFR_CS ;clk/REFR_PRE | |
344 | sts TCCR2B,temp | |
345 | ldi temp,(1<<OCIE2A) | |
346 | sts TIMSK2,temp | |
347 | #endif | |
37617bd8 L |
348 | |
349 | ||
350 | ; Init clock/timer system | |
351 | ||
352 | ldi zl,low(timer_base) | |
353 | ldi zh,high(timer_base) | |
37617bd8 L |
354 | ldi temp2,timer_size |
355 | ti_loop: | |
99ed7199 | 356 | st z+,_0 |
37617bd8 L |
357 | dec temp2 |
358 | brne ti_loop | |
359 | ||
360 | ; Init timer 1 as 1 ms system clock tick. | |
361 | ||
362 | #ifdef __ATmega8__ | |
363 | ldi temp,high(F_CPU/1000) | |
364 | out OCR1AH,temp | |
365 | ldi temp,low(F_CPU/1000) | |
366 | out OCR1AL,temp | |
367 | ldi temp,(1<<WGM12) | (1<<CS10) ;CTC, clk/1 | |
368 | out TCCR1B,temp | |
369 | in temp,TIMSK | |
370 | ori temp,(1<<OCIE1A) | |
371 | out TIMSK,temp | |
372 | #else | |
373 | ldi temp,high(F_CPU/1000) | |
374 | sts OCR1AH,temp | |
375 | ldi temp,low(F_CPU/1000) | |
376 | sts OCR1AL,temp | |
377 | ldi temp,(1<<WGM12) | (1<<CS10) ;CTC, clk/1 | |
378 | sts TCCR1B,temp | |
379 | lds temp,TIMSK1 | |
380 | ori temp,(1<<OCIE1A) | |
381 | sts TIMSK1,temp | |
382 | #endif | |
fdcfcd44 L |
383 | sei |
384 | ||
3c3744f1 | 385 | |
fdcfcd44 | 386 | .if BOOTWAIT |
2284d51d L |
387 | ldi temp,10 |
388 | rcall delay_ms | |
fdcfcd44 L |
389 | |
390 | .endif | |
391 | ||
392 | rcall printstr | |
64f220e6 | 393 | .db "CPM on an AVR, v1.0",13,0,0 |
fdcfcd44 L |
394 | |
395 | ||
396 | rcall printstr | |
397 | .db "Initing mmc...",13,0 | |
398 | rcall mmcInit | |
399 | ||
400 | ||
401 | .if MEMTEST | |
402 | rcall printstr | |
2284d51d | 403 | .db "Testing RAM: fill...",0,0 |
fdcfcd44 L |
404 | |
405 | ;Fill RAM | |
406 | ldi adrl,0 | |
407 | ldi adrh,0 | |
408 | ramtestw: | |
409 | mov temp,adrh | |
410 | eor temp,adrl | |
411 | rcall memwritebyte | |
99ed7199 | 412 | adiw adrl,1 |
fdcfcd44 | 413 | brcc ramtestw |
2284d51d L |
414 | rcall printstr |
415 | .db "wait...",0 | |
416 | ||
417 | ldi temp2,8 | |
418 | ramtestwl: | |
419 | ldi temp,255 | |
420 | rcall delay_ms | |
421 | dec temp2 | |
422 | brne ramtestwl | |
423 | ||
424 | rcall printstr | |
425 | .db "reread...",13,0,0 | |
fdcfcd44 L |
426 | |
427 | ;re-read RAM | |
428 | ldi adrl,0 | |
429 | ldi adrh,0 | |
430 | ramtestr: | |
431 | rcall memreadbyte | |
432 | mov temp2,adrh | |
433 | eor temp2,adrl | |
434 | cp temp,temp2 | |
435 | breq ramtestrok | |
436 | rcall printhex | |
437 | ldi temp,'<' | |
438 | rcall uartPutc | |
439 | mov temp,adrh | |
440 | eor temp,adrl | |
441 | rcall printhex | |
442 | ldi temp,'@' | |
443 | rcall uartPutc | |
444 | mov temp,adrh | |
445 | rcall printhex | |
446 | mov temp,adrl | |
447 | rcall printhex | |
448 | ldi temp,13 | |
449 | rcall uartPutc | |
450 | ramtestrok: | |
99ed7199 | 451 | adiw adrl,1 |
fdcfcd44 L |
452 | brcc ramtestr |
453 | ||
454 | .endif | |
455 | ||
456 | .if MEMFILL_CB | |
457 | ;Fill ram with cbs, which (for now) will trigger an invalid opcode error. | |
458 | ldi adrl,0 | |
459 | ldi adrh,0 | |
460 | ramfillw: | |
461 | ldi temp,0xcb | |
462 | rcall memwritebyte | |
99ed7199 | 463 | adiw adrl,1 |
fdcfcd44 L |
464 | brcc ramfillw |
465 | .endif | |
466 | ||
467 | ||
468 | ||
469 | ;Load initial sector from MMC (512 bytes) | |
470 | ldi adrh,0 | |
471 | ldi adrl,0 | |
472 | rcall mmcReadSect | |
473 | ||
474 | ;Save to Z80 RAM (only 128 bytes because that's retro) | |
db568140 L |
475 | ldi zl,low(hostbuf) |
476 | ldi zh,high(hostbuf) | |
fdcfcd44 L |
477 | ldi adrh,0x20 |
478 | ldi adrl,0x00 | |
479 | iplwriteloop: | |
480 | ld temp,z+ | |
481 | push zh | |
482 | push zl | |
483 | rcall memWriteByte | |
484 | pop zl | |
485 | pop zh | |
99ed7199 | 486 | adiw adrl,1 |
db568140 | 487 | cpi zl,low(hostbuf+128) |
fdcfcd44 | 488 | brne iplwriteloop |
db568140 | 489 | cpi zh,high(hostbuf+128) |
fdcfcd44 | 490 | brne iplwriteloop |
db568140 | 491 | rcall dsk_boot ;init (de)blocking buffer |
fdcfcd44 L |
492 | |
493 | ||
494 | ;Init z80 | |
495 | ldi temp,0x00 | |
496 | mov z_pcl,temp | |
497 | ldi temp,0x20 | |
498 | mov z_pch,temp | |
499 | ||
db568140 | 500 | cbi flags,trace |
fdcfcd44 | 501 | rcall printstr |
64f220e6 | 502 | .db 13,"Ok, CPU is live!",13,0,0 |
fdcfcd44 L |
503 | |
504 | main: | |
db568140 | 505 | cbi flags,trace |
fdcfcd44 L |
506 | cpi z_pch,1 |
507 | brlo notraceon | |
508 | cpi z_pch,$dc | |
509 | brsh notraceon | |
db568140 | 510 | sbi flags,trace |
fdcfcd44 L |
511 | notraceon: |
512 | ||
513 | ||
514 | .if PRINT_PC | |
515 | cpi z_pch,1 | |
516 | brlo noprintpc | |
517 | cpi z_pch,0xdc | |
518 | brsh noprintpc | |
519 | ||
520 | rcall printstr | |
521 | .db "PC=",0 | |
522 | mov temp,z_pch | |
523 | rcall printhex | |
524 | mov temp,z_pcl | |
525 | rcall printhex | |
526 | ldi temp,10 | |
527 | rcall uartputc | |
528 | noprintpc: | |
529 | .endif | |
530 | ||
531 | ; *** Stage 1: Fetch next opcode | |
99ed7199 | 532 | movw adrl,z_pcl |
fdcfcd44 L |
533 | rcall memReadByte |
534 | adiw z_pcl,1 | |
535 | ||
536 | ||
537 | .if INS_DEBUG | |
db568140 L |
538 | sbis flags,trace |
539 | rjmp notrace1 | |
fdcfcd44 L |
540 | rcall printstr |
541 | .db "PC=",0 | |
542 | push temp | |
543 | mov temp,adrh | |
544 | rcall printhex | |
545 | mov temp,adrl | |
546 | rcall printhex | |
547 | pop temp | |
548 | rcall printstr | |
549 | .db ", opcode=",0 | |
550 | rcall printhex | |
551 | notrace1: | |
552 | .endif | |
553 | ||
554 | ; *** Stage 2: Decode it using the ins_table. | |
fdcfcd44 | 555 | ldi zh,high(inst_table*2) |
99ed7199 | 556 | mov zl,temp |
fdcfcd44 | 557 | add zl,temp |
99ed7199 | 558 | adc zh,_0 |
fdcfcd44 L |
559 | lpm insdecl,Z+ |
560 | lpm insdech,Z | |
561 | ||
562 | .if INS_DEBUG | |
db568140 L |
563 | sbis flags,trace |
564 | rjmp notrace2 | |
fdcfcd44 L |
565 | rcall printstr |
566 | .db ", decoded=",0 | |
567 | mov temp,insdech | |
568 | rcall printhex | |
569 | mov temp,insdecl | |
570 | rcall printhex | |
571 | rcall printstr | |
572 | .db ".",13,0 | |
573 | notrace2: | |
574 | .endif | |
575 | ||
576 | ; *** Stage 3: Fetch operand. Use the fetch jumptable for this. | |
577 | mov temp,insdecl | |
578 | andi temp,0x1F | |
fdcfcd44 | 579 | breq nofetch |
99ed7199 L |
580 | ldi zl,low(fetchjumps) |
581 | ldi zh,high(fetchjumps) | |
fdcfcd44 | 582 | add zl,temp |
99ed7199 | 583 | adc zh,_0 |
fdcfcd44 L |
584 | icall |
585 | ||
586 | .if INS_DEBUG | |
db568140 L |
587 | sbis flags,trace |
588 | rjmp notrace3 | |
fdcfcd44 L |
589 | rcall printstr |
590 | .db "pre: oph:l=",0 | |
591 | mov temp,oph | |
592 | rcall printhex | |
593 | mov temp,opl | |
594 | rcall printhex | |
595 | rcall printstr | |
596 | .db " -- ",0 | |
597 | notrace3: | |
598 | .endif | |
599 | ||
600 | nofetch: | |
601 | ; *** Stage 4: Execute operation :) Use the op jumptable for this. | |
602 | mov temp,insdech | |
603 | andi temp,0xFC | |
fdcfcd44 | 604 | breq nooper |
99ed7199 L |
605 | lsr temp |
606 | lsr temp | |
607 | ldi zl,low(opjumps) | |
608 | ldi zh,high(opjumps) | |
fdcfcd44 | 609 | add zl,temp |
99ed7199 | 610 | adc zh,_0 |
fdcfcd44 L |
611 | icall |
612 | ||
613 | .if INS_DEBUG | |
db568140 L |
614 | sbis flags,trace |
615 | rjmp notrace4 | |
fdcfcd44 L |
616 | rcall printstr |
617 | .db ",post:oph:l=",0 | |
618 | mov temp,oph | |
619 | rcall printhex | |
620 | mov temp,opl | |
621 | rcall printhex | |
622 | notrace4: | |
623 | .endif | |
624 | ||
625 | nooper: | |
626 | ; *** Stage 5: Store operand. Use the store jumptable for this. | |
627 | swap insdecl | |
628 | swap insdech | |
db568140 | 629 | movw temp,insdecl |
fdcfcd44 | 630 | andi temp,0x0E |
db568140 L |
631 | andi temp2,0x30 |
632 | or temp,temp2 | |
fdcfcd44 | 633 | breq nostore |
99ed7199 L |
634 | lsr temp |
635 | ldi zl,low(storejumps) | |
636 | ldi zh,high(storejumps) | |
fdcfcd44 | 637 | add zl,temp |
99ed7199 | 638 | adc zh,_0 |
fdcfcd44 L |
639 | icall |
640 | ||
641 | .if INS_DEBUG | |
db568140 L |
642 | sbis flags,trace |
643 | rjmp notrace5 | |
fdcfcd44 L |
644 | rcall printstr |
645 | .db ", stored.",0 | |
646 | notrace5: | |
647 | .endif | |
648 | ||
649 | nostore: | |
650 | ||
651 | .if INS_DEBUG | |
db568140 L |
652 | sbis flags,trace |
653 | rjmp notrace6 | |
fdcfcd44 L |
654 | rcall printstr |
655 | .db 13,0 | |
656 | notrace6: | |
657 | .endif | |
658 | ||
659 | ;All done. Neeeext! | |
660 | rjmp main | |
661 | ||
662 | ||
663 | ; ----------------Virtual peripherial interface ------ | |
664 | ||
665 | ;The hw is modelled to make writing a CPM BIOS easier. | |
666 | ;Ports: | |
db568140 L |
667 | ;0 - Con status. Returns 0xFF if the UART has a byte, 0 otherwise. |
668 | ;1 - Console input, aka UDR. | |
669 | ;2 - Console output | |
670 | ;15 - Disk select | |
671 | ;16,17 - Track select | |
672 | ;18 - Sector select | |
673 | ;20 - Write addr l | |
674 | ;21 - Write addr h | |
675 | ;22 - Trigger - write 1 to read, 2 to write a sector using the above info; | |
676 | ; 3 - 5, write to allocated/dirctory/unallocated | |
677 | ||
678 | .equ READ_FUNC = 7 | |
679 | .equ WRITE_FUNC = 6 | |
680 | .equ BOOT_FUNC = 5 | |
681 | .equ HOME_FUNC = 4 | |
682 | ||
683 | ||
684 | ||
685 | ;***************************************************** | |
686 | ;* CP/M to host disk constants * | |
687 | ;***************************************************** | |
688 | .equ blksize = 1024 ;CP/M allocation size | |
689 | .equ hostsize = 512 ;host disk sector size | |
690 | ; .equ hostspt = 20 ;host disk sectors/trk | |
691 | .equ hostblk = hostsize/128 ;CP/M sects/host buff | |
692 | ; .equ CPMSPT = hostblk*hostspt;CP/M sectors/track | |
693 | .equ CPMSPT = 26 ; | |
694 | .equ SECMSK = hostblk-1 ;sector mask | |
695 | .equ SECSHF = log2(hostblk) ;sector shift | |
696 | ||
697 | ;***************************************************** | |
698 | ;* BDOS constants on entry to write * | |
699 | ;***************************************************** | |
700 | .equ WRALL = 0 ;write to allocated | |
701 | .equ WRDIR = 1 ;write to directory | |
702 | .equ WRUAL = 2 ;write to unallocated | |
703 | .equ WRTMSK= 3 ;write type mask | |
704 | ||
705 | ||
706 | .dseg | |
fdcfcd44 | 707 | |
db568140 L |
708 | seekdsk: .byte 1 ;seek disk number |
709 | seektrk: .byte 2 ;seek track number | |
710 | seeksec: .byte 1 ;seek sector number | |
711 | ||
712 | hostdsk: .byte 1 ;host disk number | |
713 | hostlba: .byte 2 ;host track number | |
714 | ||
715 | unacnt: .byte 1 ;unalloc rec cnt | |
716 | unadsk: .byte 1 ;last unalloc disk | |
717 | unatrk: .byte 2 ;last unalloc track | |
718 | unasec: .byte 1 ;last unalloc sector | |
719 | ||
720 | erflag: .byte 1 ;error reporting | |
721 | wrtype: .byte 1 ;write operation type | |
722 | dmaadr: .byte 2 ;last dma address | |
723 | hostbuf: .byte hostsize;host buffer (from/to SD-card) | |
724 | ||
725 | ||
726 | .cseg | |
727 | ||
fdcfcd44 L |
728 | ;Called with port in temp2. Should return value in temp. |
729 | portRead: | |
730 | cpi temp2,0 | |
731 | breq conStatus | |
732 | cpi temp2,1 | |
733 | breq conInp | |
37617bd8 L |
734 | |
735 | cpi temp2,TIMER_MSECS | |
736 | brlo pr_noclock | |
737 | cpi temp2,TIMER_MSECS+6 | |
738 | brsh pr_noclock | |
739 | rjmp clockget | |
740 | ||
741 | pr_noclock: | |
742 | ldi temp,0xFF | |
fdcfcd44 L |
743 | ret |
744 | ||
745 | ;Called with port in temp2 and value in temp. | |
746 | portWrite: | |
747 | cpi temp2,0 | |
748 | breq dbgOut | |
749 | cpi temp2,2 | |
750 | breq conOut | |
751 | cpi temp2,16 | |
db568140 L |
752 | breq dskTrackSel_l |
753 | cpi temp2,17 | |
754 | breq dskTrackSel_h | |
fdcfcd44 L |
755 | cpi temp2,18 |
756 | breq dskSecSel | |
757 | cpi temp2,20 | |
758 | breq dskDmaL | |
759 | cpi temp2,21 | |
760 | breq dskDmaH | |
db568140 | 761 | |
fdcfcd44 L |
762 | cpi temp2,22 |
763 | breq dskDoIt | |
37617bd8 L |
764 | |
765 | cpi temp2,TIMERPORT | |
766 | brlo pw_noclock | |
767 | cpi temp2,TIMER_MSECS+6 | |
768 | brsh pw_noclock | |
769 | rjmp clockput | |
770 | ||
771 | pw_noclock: | |
fdcfcd44 L |
772 | ret |
773 | ||
774 | ||
775 | conStatus: | |
37617bd8 L |
776 | |
777 | lds temp,rxcount | |
778 | tst temp | |
779 | breq PC+2 | |
fdcfcd44 L |
780 | ldi temp,0xff |
781 | ret | |
782 | ||
783 | conInp: | |
784 | rcall uartGetc | |
785 | ret | |
786 | ||
787 | dbgOut: | |
788 | rcall printstr | |
789 | .db "Debug: ",0 | |
790 | rcall printhex | |
791 | rcall printstr | |
792 | .db 13,0 | |
793 | ret | |
794 | ||
795 | conOut: | |
796 | rcall uartputc | |
797 | ret | |
798 | ||
37617bd8 L |
799 | |
800 | ||
db568140 L |
801 | dskTrackSel_l: |
802 | sts seektrk,temp | |
803 | sts seektrk+1,_0 | |
804 | ret | |
805 | ||
806 | dskTrackSel_h: | |
807 | sts seektrk+1,temp | |
fdcfcd44 L |
808 | ret |
809 | ||
810 | dskSecSel: | |
db568140 | 811 | sts seeksec,temp |
fdcfcd44 L |
812 | ret |
813 | ||
814 | dskDmal: | |
db568140 | 815 | sts dmaadr,temp |
fdcfcd44 L |
816 | ret |
817 | ||
818 | dskDmah: | |
db568140 | 819 | sts dmaadr+1,temp |
fdcfcd44 L |
820 | ret |
821 | ||
822 | dskDoIt: | |
db568140 L |
823 | ;See what has to be done. |
824 | sbrc temp,READ_FUNC | |
825 | rjmp dsk_read | |
826 | sbrc temp,WRITE_FUNC | |
827 | rjmp dsk_write | |
828 | sbrc temp,HOME_FUNC | |
829 | rjmp dsk_home | |
830 | sbrc temp,BOOT_FUNC | |
831 | rjmp dsk_boot | |
832 | ||
833 | rcall printstr | |
834 | .db "DISK I/O: Invalid Function code: ",0 | |
835 | rcall printhex | |
836 | rjmp haltinv | |
837 | ||
838 | dsk_boot: | |
839 | cbi flags,hostact ;host buffer inactive | |
840 | sts unacnt,_0 ;clear unalloc count | |
841 | ret | |
842 | ||
843 | dsk_home: | |
844 | sbis flags,hostwrt ;check for pending write | |
845 | cbi flags,hostact ;clear host active flag | |
846 | ret | |
847 | ||
848 | ||
849 | dsk_read: | |
850 | ||
851 | .if 0 | |
852 | rcall timer_quit | |
853 | rcall printstr | |
854 | .db " In",0 | |
855 | .endif | |
856 | ||
fdcfcd44 L |
857 | .if DISK_DEBUG |
858 | push temp | |
859 | rcall printstr | |
db568140 L |
860 | .db 13,0 |
861 | rcall printstr | |
fdcfcd44 | 862 | .db "Disk read: track ",0 |
db568140 L |
863 | lds temp,seektrk+1 |
864 | rcall printhex | |
865 | lds temp,seektrk | |
fdcfcd44 L |
866 | rcall printhex |
867 | rcall printstr | |
db568140 L |
868 | .db " sector ",0,0 |
869 | lds temp,seeksec | |
fdcfcd44 L |
870 | rcall printhex |
871 | rcall printstr | |
db568140 L |
872 | .db " dma-addr ",0,0 |
873 | lds temp,dmaadr+1 | |
fdcfcd44 | 874 | rcall printhex |
db568140 | 875 | lds temp,dmaadr |
fdcfcd44 | 876 | rcall printhex |
db568140 L |
877 | ; rcall printstr |
878 | ; .db ".",13,0,0 | |
fdcfcd44 L |
879 | pop temp |
880 | .endif | |
db568140 L |
881 | sts unacnt,_0 |
882 | sbi flags,readop ;read operation | |
883 | sbi flags,rsflag ;must read data | |
884 | ldi temp,WRUAL ;write type | |
885 | sts wrtype,temp ;treat as unalloc | |
886 | rjmp dsk_rwoper ;to perform the read | |
fdcfcd44 | 887 | |
fdcfcd44 | 888 | |
db568140 L |
889 | dsk_write: |
890 | ;write the selected CP/M sector | |
fdcfcd44 | 891 | |
db568140 L |
892 | andi temp,WRTMSK |
893 | sts wrtype,temp ;save write type | |
894 | cbi flags,readop ;not a read operation | |
fdcfcd44 L |
895 | |
896 | .if DISK_DEBUG | |
897 | push temp | |
898 | rcall printstr | |
db568140 L |
899 | .db 13,0 |
900 | rcall printstr | |
901 | .db "Disk write: track ",0,0 | |
902 | lds temp,seektrk+1 | |
903 | rcall printhex | |
904 | lds temp,seektrk | |
fdcfcd44 L |
905 | rcall printhex |
906 | rcall printstr | |
db568140 L |
907 | .db " sector ",0,0 |
908 | lds temp,seeksec | |
fdcfcd44 L |
909 | rcall printhex |
910 | rcall printstr | |
db568140 L |
911 | .db " dma-addr ",0,0 |
912 | lds temp,dmaadr+1 | |
fdcfcd44 | 913 | rcall printhex |
db568140 | 914 | lds temp,dmaadr |
fdcfcd44 L |
915 | rcall printhex |
916 | rcall printstr | |
db568140 L |
917 | .db " wrtype ",0,0 |
918 | lds temp,wrtype | |
919 | rcall printhex | |
920 | ; rcall printstr | |
921 | ; .db ".",13,0,0 | |
fdcfcd44 L |
922 | pop temp |
923 | .endif | |
924 | ||
db568140 L |
925 | cpi temp,WRUAL ;write unallocated? |
926 | brne dsk_chkuna ;check for unalloc | |
927 | ||
928 | ; write to unallocated, set parameters | |
929 | ldi temp,blksize/128 ;next unalloc recs | |
930 | sts unacnt,temp | |
931 | lds temp,seekdsk ;disk to seek | |
932 | sts unadsk,temp ;unadsk = sekdsk | |
933 | lds temp,seektrk | |
934 | sts unatrk,temp ;unatrk = sectrk | |
935 | lds temp,seektrk+1 | |
936 | sts unatrk+1,temp ;unatrk = sectrk | |
937 | lds temp,seeksec | |
938 | sts unasec,temp ;unasec = seksec | |
939 | ; | |
940 | dsk_chkuna: | |
941 | ;check for write to unallocated sector | |
942 | lds temp,unacnt ;any unalloc remain? | |
943 | tst temp | |
944 | breq dsk_alloc ;skip if not | |
945 | ||
946 | ; more unallocated records remain | |
947 | dec temp ;unacnt = unacnt-1 | |
948 | sts unacnt,temp | |
949 | lds temp,seekdsk ;same disk? | |
950 | lds temp2,unadsk | |
951 | cp temp,temp2 ;seekdsk = unadsk? | |
952 | brne dsk_alloc ;skip if not | |
953 | ||
954 | ; disks are the same | |
955 | lds temp,unatrk | |
956 | lds temp2,unatrk+1 | |
957 | lds temp3,seektrk | |
958 | lds temp4,seektrk+1 | |
959 | cp temp,temp3 ;seektrk = unatrk? | |
960 | cpc temp2,temp4 | |
961 | brne dsk_alloc ;skip if not | |
962 | ||
963 | ; tracks are the same | |
964 | lds temp,seeksec ;same sector? | |
965 | lds temp2,unasec | |
966 | cp temp,temp2 ;seeksec = unasec? | |
967 | brne dsk_alloc ;skip if not | |
968 | ||
969 | ; match, move to next sector for future ref | |
970 | inc temp2 ;unasec = unasec+1 | |
971 | sts unasec,temp2 | |
972 | cpi temp2,CPMSPT ;end of track? (count CP/M sectors) | |
973 | brlo dsk_noovf ;skip if no overflow | |
974 | ||
975 | ; overflow to next track | |
976 | sts unasec,_0 ;unasec = 0 | |
977 | lds temp,unatrk | |
978 | lds temp2,unatrk+1 | |
979 | subi temp, low(-1) ;unatrk = unatrk+1 | |
980 | sbci temp2,high(-1) | |
981 | sts unatrk,temp | |
982 | sts unatrk+1,temp2 | |
983 | ; | |
984 | dsk_noovf: | |
985 | cbi flags,rsflag ;rsflag = 0 | |
986 | rjmp dsk_rwoper ;to perform the write | |
987 | ; | |
988 | dsk_alloc: | |
989 | ;not an unallocated record, requires pre-read | |
990 | sts unacnt,_0 ;unacnt = 0 | |
991 | sbi flags,rsflag ;rsflag = 1 | |
992 | ||
993 | ;***************************************************** | |
994 | ;* Common code for READ and WRITE follows * | |
995 | ;***************************************************** | |
996 | ||
997 | dsk_rwoper: | |
998 | ;enter here to perform the read/write | |
999 | sts erflag,_0 ;no errors (yet) | |
1000 | ||
1001 | ;Convert track/sector to an LBA address (in 128byte blocks) | |
1002 | ||
1003 | lds adrl,seeksec ; | |
1004 | ldi adrh,0 ; | |
1005 | lds temp3,seektrk ; | |
1006 | lds temp4,seektrk+1 ; | |
1007 | ldi temp,CPMSPT ; | |
1008 | mul temp3,temp ; | |
1009 | add adrl,r0 ; | |
1010 | adc adrh,r1 ; | |
1011 | mul temp4,temp ; | |
1012 | add adrh,r0 ;adrh:adrl := sec + trk * SectorsPerTrack | |
1013 | clr _0 | |
1014 | ||
1015 | mov temp,adrl | |
1016 | andi temp,SECMSK ;mask buffer number | |
1017 | push temp ;save for later | |
1018 | .if DISK_DEBUG | |
1019 | rcall printstr | |
1020 | .db "; bufnr: ",0,0 | |
1021 | rcall printhex | |
1022 | .endif | |
fdcfcd44 | 1023 | |
db568140 L |
1024 | ;Convert from CP/M LBA blocks to host LBA blocks |
1025 | ldi temp,SECSHF | |
1026 | dsk_sh1: | |
1027 | lsr adrh | |
1028 | ror adrl | |
1029 | dec temp | |
1030 | brne dsk_sh1 | |
1031 | ;adrh:adrl = host block to seek | |
1032 | ; active host sector? | |
1033 | sbis flags,hostact ;host active? | |
1034 | rjmp dsk_filhst ;fill host if not | |
1035 | ||
1036 | ; host buffer active, same as seek buffer? | |
1037 | lds temp,seekdsk | |
1038 | lds temp3,hostdsk ;same disk? | |
1039 | cp temp,temp3 ;seekdsk = hostdsk? | |
1040 | brne dsk_nomatch | |
1041 | ||
1042 | ; same disk, same block? | |
1043 | lds temp3,hostlba | |
1044 | lds temp4,hostlba+1 | |
1045 | cp adrl,temp3 | |
1046 | cpc adrh,temp4 | |
1047 | breq dsk_match | |
1048 | ; | |
1049 | dsk_nomatch: | |
1050 | ;proper disk, but not correct sector | |
1051 | sbic flags,hostwrt ;host written? | |
1052 | rcall dsk_writehost ;clear host buff | |
1053 | ||
1054 | dsk_filhst: | |
1055 | ;may have to fill the host buffer | |
1056 | lds temp,seekdsk | |
1057 | sts hostdsk,temp | |
1058 | sts hostlba,adrl | |
1059 | sts hostlba+1,adrh | |
1060 | ||
1061 | sbic flags,rsflag ;need to read? | |
1062 | rcall dsk_readhost ;yes, if 1 | |
1063 | cbi flags,hostwrt ;no pending write | |
1064 | ||
1065 | dsk_match: | |
1066 | sbi flags,hostact ;host buffer active now | |
1067 | ||
1068 | ;copy data to or from buffer | |
1069 | ldi zl,low(hostbuf) | |
1070 | ldi zh,high(hostbuf) | |
1071 | ldi temp,128 | |
1072 | pop temp2 ;get buffer number (which part of hostbuf) | |
1073 | mul temp2,temp | |
1074 | add zl,r0 ;offset in hostbuf | |
1075 | adc zh,r1 | |
1076 | .if DISK_DEBUG | |
1077 | push r0 | |
1078 | push r1 | |
1079 | clr _0 | |
1080 | rcall printstr | |
1081 | .db "; host buf adr: ",0,0 | |
1082 | pop temp | |
1083 | rcall printhex | |
1084 | pop temp | |
1085 | rcall printhex | |
1086 | .endif | |
1087 | clr _0 | |
1088 | ||
1089 | lds adrl,dmaadr | |
1090 | lds adrh,dmaadr+1 | |
1091 | push yl | |
1092 | ldi yl,128 ;length of move | |
1093 | sbic flags,readop ;which way? | |
1094 | rjmp dsk_rmove ;skip if read | |
1095 | ||
1096 | ; mark write operation | |
1097 | sbi flags,hostwrt ;hostwrt = 1 | |
1098 | dsk_wmove: | |
fdcfcd44 | 1099 | rcall memReadByte |
fdcfcd44 | 1100 | st z+,temp |
99ed7199 | 1101 | adiw adrl,1 |
db568140 L |
1102 | dec yl |
1103 | brne dsk_wmove | |
1104 | rjmp dsk_rwmfin | |
1105 | ||
1106 | dsk_rmove: | |
1107 | ld temp,z+ | |
1108 | rcall memWriteByte | |
1109 | adiw adrl,1 | |
1110 | dec yl | |
1111 | brne dsk_rmove | |
1112 | dsk_rwmfin: | |
1113 | pop yl | |
1114 | ; data has been moved to/from host buffer | |
1115 | lds temp,wrtype ;write type | |
1116 | cpi temp,WRDIR ;to directory? | |
1117 | breq dsk_wdir | |
1118 | lds temp,erflag | |
1119 | .if 0 | |
1120 | rcall timer_quit | |
1121 | rcall printstr | |
1122 | .db " Out",0 | |
1123 | .endif | |
1124 | ret ;no further processing | |
1125 | dsk_wdir: | |
1126 | ; clear host buffer for directory write | |
1127 | lds temp,erflag | |
1128 | tst temp ;errors? | |
1129 | breq dsk_wdir1 | |
1130 | ret ;skip if so | |
1131 | dsk_wdir1: | |
1132 | rcall dsk_writehost ;clear host buff | |
1133 | cbi flags,hostwrt ;buffer written | |
1134 | lds temp,erflag | |
1135 | ret | |
1136 | ||
1137 | ||
1138 | ;***************************************************** | |
1139 | ;* WRITEhost performs the physical write to * | |
1140 | ;* the host disk, READhost reads the physical * | |
1141 | ;* disk. * | |
1142 | ;***************************************************** | |
1143 | ||
1144 | dsk_writehost: | |
1145 | ;hostdsk = host disk #, hostlba = host block #. | |
1146 | ;Write "hostsize" bytes from hostbuf and return | |
1147 | ;error flag in erflag. | |
1148 | ;Return erflag non-zero if error | |
1149 | ||
1150 | push adrh | |
1151 | push adrl | |
1152 | lds adrl,hostlba | |
1153 | lds adrh,hostlba+1 | |
1154 | rcall mmcWriteSect | |
1155 | pop adrl | |
1156 | pop adrh | |
1157 | sts erflag,_0 | |
1158 | ret | |
fdcfcd44 | 1159 | |
db568140 L |
1160 | dsk_readhost: |
1161 | ;hostdsk = host disk #, hostlba = host block #. | |
1162 | ;Read "hostsiz" bytes into hostbuf and return | |
1163 | ;error flag in erflag. | |
fdcfcd44 | 1164 | |
db568140 L |
1165 | push adrh |
1166 | push adrl | |
1167 | lds adrl,hostlba | |
1168 | lds adrh,hostlba+1 | |
1169 | rcall mmcReadSect | |
1170 | pop adrl | |
1171 | pop adrh | |
1172 | sts erflag,_0 | |
1173 | ret | |
fdcfcd44 | 1174 | |
fdcfcd44 | 1175 | |
db568140 | 1176 | ;*************************************************************************** |
fdcfcd44 L |
1177 | |
1178 | ; ----------------- MMC/SD routines ------------------ | |
1179 | ||
1180 | mmcByteNoSend: | |
1181 | ldi temp,0xff | |
1182 | mmcByte: | |
1183 | ||
1184 | .if MMC_DEBUG | |
1185 | push zl | |
1186 | push zh | |
1187 | rcall printstr | |
1188 | .db "MMC: <--",0 | |
1189 | rcall printhex | |
1190 | .endif | |
1191 | ||
1192 | out SPDR,temp | |
1193 | mmcWrByteW: | |
1194 | in temp,SPSR | |
1195 | sbrs temp,7 | |
1196 | rjmp mmcWrByteW | |
1197 | in temp,SPDR | |
1198 | ||
1199 | .if MMC_DEBUG | |
1200 | push temp | |
1201 | rcall printstr | |
1202 | .db ", -->",0 | |
1203 | rcall printhex | |
1204 | rcall printstr | |
1205 | .db ".",13,0 | |
1206 | pop temp | |
1207 | pop zh | |
1208 | pop zl | |
1209 | .endif | |
1210 | ret | |
1211 | ||
1212 | ||
1213 | ;Wait till the mmc answers with the response in temp2, or till a timeout happens. | |
1214 | mmcWaitResp: | |
1215 | ldi zl,0 | |
1216 | ldi zh,0 | |
1217 | mmcWaitResploop: | |
1218 | rcall mmcByteNoSend | |
1219 | cpi temp,0xff | |
1220 | brne mmcWaitResploopEnd | |
1221 | adiw zl,1 | |
1222 | cpi zh,255 | |
1223 | breq mmcWaitErr | |
1224 | rjmp mmcWaitResploop | |
1225 | mmcWaitResploopEnd: | |
1226 | ret | |
1227 | ||
1228 | ||
1229 | mmcWaitErr: | |
1230 | mov temp,temp2 | |
1231 | rcall printhex | |
1232 | rcall printstr | |
1233 | .db ": Error: MMC resp timeout!",13,0 | |
1234 | rjmp resetAVR | |
1235 | ||
1236 | mmcInit: | |
1237 | ldi temp,0x53 | |
1238 | out SPCR,temp | |
1239 | ||
1240 | ;Init start: send 80 clocks with cs disabled | |
ebf7dfab | 1241 | sbi P_MMC_CS,mmc_cs |
fdcfcd44 | 1242 | |
063dfad2 L |
1243 | ; ldi temp2,20 |
1244 | ldi temp2,10 ; exactly 80 clocks | |
fdcfcd44 L |
1245 | mmcInitLoop: |
1246 | mov temp,temp2 | |
1247 | rcall mmcByte | |
1248 | dec temp2 | |
1249 | brne mmcInitLoop | |
1250 | ||
ebf7dfab | 1251 | cbi P_MMC_CS,mmc_cs |
fdcfcd44 L |
1252 | rcall mmcByteNoSend |
1253 | rcall mmcByteNoSend | |
1254 | rcall mmcByteNoSend | |
1255 | rcall mmcByteNoSend | |
1256 | rcall mmcByteNoSend | |
1257 | rcall mmcByteNoSend | |
ebf7dfab | 1258 | sbi P_MMC_CS,mmc_cs |
fdcfcd44 L |
1259 | rcall mmcByteNoSend |
1260 | rcall mmcByteNoSend | |
1261 | rcall mmcByteNoSend | |
1262 | rcall mmcByteNoSend | |
1263 | ||
1264 | ;Send init command | |
ebf7dfab | 1265 | cbi P_MMC_CS,mmc_cs |
fdcfcd44 L |
1266 | ldi temp,0xff ;dummy |
1267 | rcall mmcByte | |
1268 | ldi temp,0xff ;dummy | |
1269 | rcall mmcByte | |
1270 | ldi temp,0x40 ;cmd | |
1271 | rcall mmcByte | |
1272 | ldi temp,0 ;pxh | |
1273 | rcall mmcByte | |
1274 | ldi temp,0 ;pxl | |
1275 | rcall mmcByte | |
1276 | ldi temp,0 ;pyh | |
1277 | rcall mmcByte | |
1278 | ldi temp,0 ;pyl | |
1279 | rcall mmcByte | |
1280 | ldi temp,0x95 ;crc | |
1281 | rcall mmcByte | |
1282 | ldi temp,0xff ;return byte | |
1283 | rcall mmcByte | |
1284 | ||
063dfad2 L |
1285 | ldi temp2,0 ;Error Code 0 |
1286 | rcall mmcWaitResp ;Test on CMD0 is OK | |
fdcfcd44 | 1287 | |
063dfad2 | 1288 | sbi P_MMC_CS,mmc_cs ;disable /CS |
fdcfcd44 L |
1289 | rcall mmcByteNoSend |
1290 | ||
1291 | ||
1292 | ;Read OCR till card is ready | |
063dfad2 | 1293 | ldi temp2,20 ;repeat counter |
fdcfcd44 L |
1294 | mmcInitOcrLoop: |
1295 | push temp2 | |
1296 | ||
063dfad2 | 1297 | cbi P_MMC_CS,mmc_cs ;enable /CS |
fdcfcd44 L |
1298 | ldi temp,0xff ;dummy |
1299 | rcall mmcByte | |
1300 | ldi temp,0x41 ;cmd | |
1301 | rcall mmcByte | |
1302 | ldi temp,0 ;pxh | |
1303 | rcall mmcByte | |
1304 | ldi temp,0 ;pxl | |
1305 | rcall mmcByte | |
1306 | ldi temp,0 ;pyh | |
1307 | rcall mmcByte | |
1308 | ldi temp,0 ;pyl | |
1309 | rcall mmcByte | |
063dfad2 L |
1310 | ; ldi temp,0x95 ;crc |
1311 | ldi temp,0x01 ;crc | |
fdcfcd44 L |
1312 | rcall mmcByte |
1313 | rcall mmcByteNoSend | |
1314 | ||
1315 | ldi temp2,1 | |
063dfad2 L |
1316 | rcall mmcWaitResp ;wait until mmc-card send a byte <> 0xFF |
1317 | ;the first answer must be 0x01 (Idle-Mode) | |
fdcfcd44 | 1318 | cpi temp,0 |
063dfad2 | 1319 | breq mmcInitOcrLoopDone ;second answer is 0x00 (Idle-Mode leave) CMD1 is OK |
fdcfcd44 | 1320 | |
063dfad2 L |
1321 | sbi P_MMC_CS,mmc_cs ;disable /CS |
1322 | ||
1323 | ; rcall mmcByteNoSend ;unnecessary | |
1324 | ||
1325 | ldi temp,10 | |
1326 | rcall delay_ms | |
fdcfcd44 L |
1327 | |
1328 | pop temp2 | |
1329 | dec temp2 | |
1330 | cpi temp2,0 | |
063dfad2 | 1331 | brne mmcInitOcrLoop ;repeat |
fdcfcd44 | 1332 | |
063dfad2 | 1333 | ldi temp2,4 |
fdcfcd44 L |
1334 | rjmp mmcWaitErr |
1335 | ||
1336 | mmcInitOcrLoopDone: | |
1337 | pop temp2 | |
063dfad2 | 1338 | sbi P_MMC_CS,mmc_cs ;disable /CS |
fdcfcd44 L |
1339 | rcall mmcByteNoSend |
1340 | ||
99ed7199 | 1341 | out SPCR,_0 |
fdcfcd44 L |
1342 | ret |
1343 | ||
1344 | ||
1345 | ;Call this with adrh:adrl = sector number | |
1346 | ;16bit lba address means a max reach of 32M. | |
1347 | mmcReadSect: | |
1348 | ldi temp,0x50 | |
1349 | out SPCR,temp | |
1350 | ||
ebf7dfab | 1351 | cbi P_MMC_CS,mmc_cs |
fdcfcd44 L |
1352 | rcall mmcByteNoSend |
1353 | ldi temp,0x51 ;cmd (read sector) | |
1354 | rcall mmcByte | |
1355 | ldi temp,0 | |
1356 | lsl adrl | |
1357 | rol adrh | |
1358 | rol temp | |
1359 | rcall mmcByte | |
1360 | mov temp,adrh ;pxl | |
1361 | rcall mmcByte | |
1362 | mov temp,adrl ;pyh | |
1363 | rcall mmcByte | |
1364 | ldi temp,0 ;pyl | |
1365 | rcall mmcByte | |
1366 | ldi temp,0x95 ;crc | |
1367 | rcall mmcByte | |
1368 | ldi temp,0xff ;return byte | |
1369 | rcall mmcByte | |
1370 | ||
1371 | ;resp | |
1372 | ldi temp2,2 | |
1373 | rcall mmcWaitResp | |
1374 | ||
1375 | ;data token | |
1376 | ldi temp2,3 | |
1377 | rcall mmcWaitResp | |
1378 | ||
1379 | ;Read sector to AVR RAM | |
db568140 L |
1380 | ldi zl,low(hostbuf) |
1381 | ldi zh,high(hostbuf) | |
fdcfcd44 L |
1382 | mmcreadloop: |
1383 | rcall mmcByteNoSend | |
1384 | st z+,temp | |
db568140 | 1385 | cpi zl,low(hostbuf+512) |
fdcfcd44 | 1386 | brne mmcreadloop |
db568140 | 1387 | cpi zh,high(hostbuf+512) |
fdcfcd44 L |
1388 | brne mmcreadloop |
1389 | ||
1390 | ;CRC | |
1391 | rcall mmcByteNoSend | |
1392 | rcall mmcByteNoSend | |
1393 | ||
ebf7dfab | 1394 | sbi P_MMC_CS,mmc_cs |
fdcfcd44 L |
1395 | rcall mmcByteNoSend |
1396 | ||
99ed7199 | 1397 | out SPCR,_0 |
fdcfcd44 L |
1398 | ret |
1399 | ||
1400 | ||
1401 | ;Call this with adrh:adrl = sector number | |
1402 | ;16bit lba address means a max reach of 32M. | |
1403 | mmcWriteSect: | |
1404 | ldi temp,0x50 | |
1405 | out SPCR,temp | |
1406 | ||
ebf7dfab | 1407 | cbi P_MMC_CS,mmc_cs |
fdcfcd44 L |
1408 | rcall mmcByteNoSend |
1409 | ||
1410 | ldi temp,0x58 ;cmd (write sector) | |
1411 | rcall mmcByte | |
1412 | ldi temp,0 | |
1413 | lsl adrl | |
1414 | rol adrh | |
1415 | rol temp | |
1416 | rcall mmcByte | |
1417 | mov temp,adrh ;pxl | |
1418 | rcall mmcByte | |
1419 | mov temp,adrl ;pyh | |
1420 | rcall mmcByte | |
1421 | ldi temp,0 ;pyl | |
1422 | rcall mmcByte | |
1423 | ldi temp,0x95 ;crc | |
1424 | rcall mmcByte | |
1425 | ldi temp,0xff ;return byte | |
1426 | rcall mmcByte | |
1427 | ||
1428 | ;resp | |
1429 | ldi temp2,1 | |
1430 | rcall mmcWaitResp | |
1431 | ||
1432 | ;Send data token | |
1433 | ldi temp,0xfe | |
1434 | rcall mmcByte | |
1435 | ||
1436 | ;Write sector from AVR RAM | |
db568140 L |
1437 | ldi zl,low(hostbuf) |
1438 | ldi zh,high(hostbuf) | |
fdcfcd44 L |
1439 | mmcwriteloop: |
1440 | ld temp,z+ | |
1441 | rcall mmcByte | |
db568140 | 1442 | cpi zl,low(hostbuf+512) |
fdcfcd44 | 1443 | brne mmcwriteloop |
db568140 | 1444 | cpi zh,high(hostbuf+512) |
fdcfcd44 L |
1445 | brne mmcwriteloop |
1446 | ||
1447 | ;CRC | |
1448 | rcall mmcByteNoSend | |
1449 | rcall mmcByteNoSend | |
1450 | ||
1451 | ;Status. Ignored for now. | |
1452 | rcall mmcByteNoSend | |
1453 | ||
1454 | ;Wait till the mmc has written everything | |
1455 | mmcwaitwritten: | |
1456 | rcall mmcByteNoSend | |
1457 | cpi temp,0xff | |
1458 | brne mmcwaitwritten | |
1459 | ||
ebf7dfab | 1460 | sbi P_MMC_CS,mmc_cs |
fdcfcd44 L |
1461 | rcall mmcByteNoSend |
1462 | ||
99ed7199 | 1463 | out SPCR,_0 |
fdcfcd44 L |
1464 | ret |
1465 | ||
1466 | ||
1467 | ;Set up wdt to time out after 1 sec. | |
1468 | resetAVR: | |
1469 | cli | |
3c3744f1 L |
1470 | #if defined __ATmega8__ |
1471 | ldi temp,(1<<WDCE) | |
1472 | out WDTCSR,temp | |
1473 | ldi temp,(1<<WDCE) | (1<<WDE) | (110<<WDP0) | |
1474 | out WDTCSR,temp | |
1475 | #else | |
1476 | ldi temp,(1<<WDCE) | |
fdcfcd44 | 1477 | sts WDTCSR,temp |
3c3744f1 | 1478 | ldi temp,(1<<WDCE) | (1<<WDE) | (110<<WDP0) |
fdcfcd44 | 1479 | sts WDTCSR,temp |
3c3744f1 | 1480 | #endif |
fdcfcd44 L |
1481 | resetwait: |
1482 | rjmp resetwait | |
1483 | ||
1484 | ; ------------------ DRAM routines ------------- | |
1485 | ||
c319c76b | 1486 | ; DRAM_SETADDR val, low_and_mask, low_or_mask, high_and_mask, high_or_mask |
37617bd8 | 1487 | .macro DRAM_SETADDR |
c319c76b L |
1488 | mov temp,@0 |
1489 | .if low(@1) != 0xff | |
1490 | andi temp,@1 | |
1491 | .endif | |
1492 | .if low(@2) != 0 | |
1493 | ori temp, @2 | |
1494 | .endif | |
ebf7dfab | 1495 | out P_AL,temp |
c319c76b L |
1496 | |
1497 | mov temp,@0 | |
1498 | .if low(@3) != 0xff | |
1499 | andi temp,@3 | |
1500 | .endif | |
1501 | ori temp, @4 | (1<<mmc_cs) | |
ebf7dfab | 1502 | out P_AH,temp |
37617bd8 | 1503 | .endm |
37617bd8 | 1504 | |
37617bd8 L |
1505 | ;Loads the byte on address adrh:adrl into temp. |
1506 | ;must not alter adrh:adrl | |
1507 | ||
1508 | dram_read: | |
1509 | cli | |
c319c76b | 1510 | DRAM_SETADDR adrh, ~0,(1<<ram_ras), ~(1<<ram_a8), (1<<ram_oe) |
ebf7dfab | 1511 | cbi P_RAS,ram_ras |
c319c76b | 1512 | DRAM_SETADDR adrl, ~(1<<ram_ras),0, ~((1<<ram_oe)), (1<<ram_a8) |
ebf7dfab | 1513 | cbi P_CAS,ram_cas |
c319c76b | 1514 | cbi P_A8,ram_a8 |
ebf7dfab L |
1515 | in temp,P_DQ-2 ; PIN |
1516 | sbi P_CAS,ram_cas | |
37617bd8 | 1517 | |
ebf7dfab | 1518 | cbi P_CAS,ram_cas |
29c45e41 L |
1519 | andi temp,0x0f |
1520 | swap temp | |
ebf7dfab | 1521 | in temp2,P_DQ-2 ; PIN |
37617bd8 L |
1522 | andi temp2,0x0f |
1523 | or temp,temp2 | |
37617bd8 | 1524 | |
ebf7dfab L |
1525 | sbi P_OE,ram_oe |
1526 | sbi P_CAS,ram_cas | |
1527 | sbi P_RAS,ram_ras | |
37617bd8 L |
1528 | sei |
1529 | ret | |
1530 | ||
c319c76b L |
1531 | #if DRAM_WORD_ACCESS |
1532 | dram_read_w: | |
1533 | cpi adrl,255 | |
1534 | brne dram_read_w1 | |
1535 | ||
1536 | rcall dram_read | |
1537 | push temp | |
1538 | adiw adrl,1 | |
1539 | rcall dram_read | |
1540 | mov temp2,temp | |
1541 | pop temp | |
1542 | ret | |
1543 | ||
1544 | dram_read_w1: | |
1545 | cli | |
1546 | DRAM_SETADDR adrh, ~0,(1<<ram_ras), ~(1<<ram_a8),(1<<ram_oe) | |
1547 | cbi P_RAS,ram_ras | |
1548 | DRAM_SETADDR adrl, ~(1<<ram_ras),0, ~((1<<ram_oe)), (1<<ram_a8) | |
1549 | cbi P_CAS,ram_cas | |
1550 | cbi P_A8,ram_a8 | |
1551 | in temp,P_DQ-2 ; PIN | |
1552 | sbi P_CAS,ram_cas | |
1553 | cbi P_CAS,ram_cas | |
1554 | andi temp,0x0f | |
1555 | swap temp | |
1556 | in temp2,P_DQ-2 ; PIN | |
1557 | sbi P_CAS,ram_cas | |
1558 | andi temp2,0x0f | |
1559 | or temp,temp2 | |
1560 | ||
1561 | ; push temp | |
1562 | mov _wl,temp | |
1563 | inc adrl | |
1564 | DRAM_SETADDR adrl, ~(1<<ram_ras),0, ~((1<<ram_oe)), (1<<ram_a8) | |
1565 | cbi P_CAS,ram_cas | |
1566 | cbi P_A8,ram_a8 | |
1567 | in temp,P_DQ-2 ; PIN | |
1568 | sbi P_CAS,ram_cas | |
1569 | cbi P_CAS,ram_cas | |
1570 | andi temp,0x0f | |
1571 | swap temp | |
1572 | in temp2,P_DQ-2 ; PIN | |
1573 | sbi P_CAS,ram_cas | |
1574 | andi temp2,0x0f | |
1575 | or temp2,temp | |
1576 | ; pop temp | |
1577 | mov temp,_wl | |
1578 | ||
1579 | sbi P_OE,ram_oe | |
1580 | sbi P_RAS,ram_ras | |
1581 | sei | |
1582 | ret | |
1583 | #endif | |
37617bd8 L |
1584 | |
1585 | ;Writes the byte in temp to adrh:adrl | |
1586 | ;must not alter adrh:adrl | |
1587 | ||
1588 | dram_write: | |
1589 | cli | |
ebf7dfab | 1590 | ldi temp2,RAM_DQ_MASK | (1<<ram_w) | (1<<ram_cas) |
37617bd8 L |
1591 | out DDRC,temp2 |
1592 | ||
ebf7dfab L |
1593 | mov temp2,temp |
1594 | andi temp,RAM_DQ_MASK & ~(1<<ram_w) | |
1595 | ori temp,(1<<ram_cas) | |
37617bd8 | 1596 | out PORTC,temp |
c319c76b | 1597 | DRAM_SETADDR adrh, ~0,(1<<ram_ras), ~(1<<ram_a8),(1<<ram_oe) |
ebf7dfab | 1598 | cbi P_RAS,ram_ras |
c319c76b | 1599 | DRAM_SETADDR adrl, ~(1<<ram_ras),0, ~((1<<ram_a8)),(1<<ram_oe) |
37617bd8 L |
1600 | cbi PORTC,ram_cas |
1601 | sbi PORTC,ram_cas | |
1602 | ||
1603 | sbi PORTD,ram_a8 | |
ebf7dfab | 1604 | swap temp2 |
37617bd8 | 1605 | |
ebf7dfab L |
1606 | andi temp2,RAM_DQ_MASK & ~(1<<ram_w) |
1607 | ori temp2,(1<<ram_cas) | |
1608 | out PORTC,temp2 | |
37617bd8 L |
1609 | |
1610 | cbi PORTC,ram_cas | |
ebf7dfab | 1611 | sbi P_RAS,ram_ras |
37617bd8 | 1612 | |
ebf7dfab | 1613 | ldi temp,~RAM_DQ_MASK | (1<<ram_w) | (1<<ram_cas) |
37617bd8 | 1614 | out DDRC,temp |
37617bd8 | 1615 | out PORTC,temp |
37617bd8 L |
1616 | sei |
1617 | ret | |
1618 | ||
c319c76b L |
1619 | #if DRAM_WORD_ACCESS |
1620 | dram_write_w: | |
1621 | cpi adrl,255 | |
1622 | brne dram_write_w1 | |
1623 | ||
1624 | push temp2 | |
1625 | rcall dram_write | |
1626 | pop temp | |
1627 | adiw adrl,1 | |
1628 | rcall dram_write | |
1629 | ret | |
1630 | ||
1631 | dram_write_w1: | |
1632 | cli | |
1633 | push temp2 | |
1634 | ldi temp2,RAM_DQ_MASK | (1<<ram_w) | (1<<ram_cas) | |
1635 | out DDRC,temp2 | |
1636 | ||
1637 | mov temp2,temp | |
1638 | andi temp,RAM_DQ_MASK & ~(1<<ram_w) | |
1639 | ori temp,(1<<ram_cas) | |
1640 | out PORTC,temp | |
1641 | ||
1642 | DRAM_SETADDR adrh, ~0,(1<<ram_ras), ~(1<<ram_a8),(1<<ram_oe) | |
1643 | cbi P_RAS,ram_ras | |
1644 | DRAM_SETADDR adrl, ~(1<<ram_ras),0, ~((1<<ram_a8)),(1<<ram_oe) | |
1645 | cbi PORTC,ram_cas | |
1646 | sbi PORTC,ram_cas | |
1647 | ||
1648 | sbi PORTD,ram_a8 | |
1649 | swap temp2 | |
1650 | ||
1651 | andi temp2,RAM_DQ_MASK & ~(1<<ram_w) | |
1652 | ori temp2,(1<<ram_cas) | |
1653 | out PORTC,temp2 | |
1654 | ||
1655 | cbi PORTC,ram_cas | |
1656 | sbi PORTC,ram_cas | |
1657 | ||
1658 | pop temp | |
1659 | inc adrl | |
1660 | mov temp2,temp | |
1661 | andi temp,RAM_DQ_MASK & ~(1<<ram_w) | |
1662 | ori temp,(1<<ram_cas) | |
1663 | out PORTC,temp | |
1664 | ||
1665 | DRAM_SETADDR adrl, ~(1<<ram_ras),0, ~((1<<ram_a8)),(1<<ram_oe) | |
1666 | cbi PORTC,ram_cas | |
1667 | sbi PORTC,ram_cas | |
1668 | ||
1669 | sbi PORTD,ram_a8 | |
1670 | swap temp2 | |
1671 | ||
1672 | andi temp2,RAM_DQ_MASK & ~(1<<ram_w) | |
1673 | ori temp2,(1<<ram_cas) | |
1674 | out PORTC,temp2 | |
1675 | cbi PORTC,ram_cas | |
1676 | ||
1677 | sbi P_RAS,ram_ras | |
1678 | ||
1679 | ldi temp,~RAM_DQ_MASK | (1<<ram_w) | (1<<ram_cas) | |
1680 | out DDRC,temp | |
1681 | out PORTC,temp | |
1682 | sei | |
1683 | ret | |
1684 | #endif | |
37617bd8 L |
1685 | |
1686 | ; **************************************************************************** | |
1687 | ||
1688 | ; refresh interupt; exec 2 cbr cycles | |
1689 | refrint: | |
2284d51d L |
1690 | ;4 CAS RAS |
1691 | cbi P_CAS,ram_cas ;2 1| 1| | |
1692 | ; 1| 1| | |
1693 | cbi P_RAS,ram_ras ;2 |0 1| | |
1694 | ; |0 1| | |
1695 | nop ;1 |0 |0 | |
1696 | ; nop ;1 |0 |0 | |
1697 | sbi P_RAS,ram_ras ;2 |0 |0 | |
1698 | ; |0 |0 | |
1699 | ; nop ;1 |0 |0 | |
1700 | cbi P_RAS,ram_ras ;2 |0 1| | |
1701 | ; |0 1| | |
1702 | sbi P_CAS,ram_cas ;2 |0 |0 | |
1703 | ; |0 |0 | |
1704 | sbi P_RAS,ram_ras ;2 1| |0 | |
1705 | ; 1| 1| | |
1706 | reti ;4 --> 21 cycles | |
37617bd8 L |
1707 | |
1708 | ; **************************************************************************** | |
1709 | ||
1710 | ; ------------- system timer 10ms --------------- | |
1711 | .dseg | |
1712 | ||
2284d51d L |
1713 | delay_timer: |
1714 | .byte 1 | |
37617bd8 L |
1715 | timer_base: |
1716 | timer_ms: | |
1717 | .byte 2 | |
1718 | timer_s: | |
1719 | .byte 4 | |
1720 | ; don't change order here, clock put/get depends on it. | |
1721 | cntms_out: ; register for ms | |
1722 | .byte 2 | |
1723 | utime_io: ; register for uptime. | |
1724 | .byte 4 | |
1725 | cnt_1ms: | |
1726 | .byte 2 | |
1727 | uptime: | |
1728 | .byte 4 | |
1729 | timer_top: | |
1730 | .equ timer_size = timer_top - timer_base | |
1731 | ||
1732 | .equ clkofs = cnt_1ms-cntms_out | |
1733 | .equ timerofs = cnt_1ms-timer_ms | |
1734 | ||
1735 | .cseg | |
1736 | sysclockint: | |
1737 | push zl | |
1738 | in zl,SREG | |
1739 | push zl | |
1740 | push zh | |
1741 | ||
2284d51d L |
1742 | lds zl,delay_timer |
1743 | subi zl,1 | |
1744 | brcs syscl1 | |
1745 | sts delay_timer,zl | |
1746 | syscl1: | |
37617bd8 L |
1747 | lds zl,cnt_1ms |
1748 | lds zh,cnt_1ms+1 | |
1749 | adiw z,1 | |
1750 | ||
1751 | sts cnt_1ms,zl | |
1752 | sts cnt_1ms+1,zh | |
1753 | cpi zl,low(1000) | |
1754 | ldi zl,high(1000) ;doesn't change flags | |
1755 | cpc zh,zl | |
1756 | brlo syscl_end | |
1757 | ||
99ed7199 L |
1758 | sts cnt_1ms,_0 |
1759 | sts cnt_1ms+1,_0 | |
37617bd8 L |
1760 | |
1761 | lds zl,uptime+0 | |
1762 | inc zl | |
1763 | sts uptime+0,zl | |
1764 | brne syscl_end | |
1765 | lds zl,uptime+1 | |
1766 | inc zl | |
1767 | sts uptime+1,zl | |
1768 | brne syscl_end | |
1769 | lds zl,uptime+2 | |
1770 | inc zl | |
1771 | sts uptime+2,zl | |
1772 | brne syscl_end | |
1773 | lds zl,uptime+3 | |
1774 | inc zl | |
1775 | sts uptime+3,zl | |
1776 | ||
1777 | syscl_end: | |
1778 | pop zh | |
1779 | pop zl | |
1780 | out SREG,zl | |
1781 | pop zl | |
1782 | reti | |
1783 | ||
2284d51d L |
1784 | ; wait for temp ms |
1785 | ||
1786 | delay_ms: | |
1787 | sts delay_timer,temp | |
1788 | dly_loop: | |
1789 | lds temp,delay_timer | |
1790 | cpi temp,0 | |
1791 | brne dly_loop | |
1792 | ret | |
1793 | ||
1794 | ; | |
37617bd8 L |
1795 | |
1796 | clockget: | |
1797 | ldi temp,0xFF | |
1798 | subi temp2,TIMER_MSECS | |
1799 | brcs clkget_end ;Port number in range? | |
1800 | ldi zl,low(cntms_out) | |
1801 | ldi zh,high(cntms_out) | |
1802 | breq clkget_copy ;lowest byte requestet, latch clock | |
1803 | cpi temp2,6 | |
1804 | brsh clkget_end ;Port number to high? | |
1805 | ||
1806 | add zl,temp2 | |
1807 | brcc PC+2 | |
1808 | inc zh | |
1809 | ld temp,z | |
1810 | clkget_end: | |
1811 | ret | |
1812 | ||
1813 | ||
1814 | ||
1815 | clkget_copy: | |
1816 | ldi temp2,6 | |
1817 | cli | |
1818 | clkget_l: | |
1819 | ldd temp,z+clkofs | |
1820 | st z+,temp | |
1821 | dec temp2 | |
1822 | brne clkget_l | |
1823 | sei | |
1824 | lds temp,cntms_out | |
1825 | ;req. byte in temp | |
1826 | ret | |
1827 | ||
1828 | clockput: | |
1829 | subi temp2,TIMERPORT | |
1830 | brcs clkput_end ;Port number in range? | |
1831 | brne clkput_1 | |
1832 | ||
1833 | ; clock control | |
1834 | ||
1835 | cpi temp,starttimercmd | |
1836 | breq timer_start | |
1837 | cpi temp,quitTimerCmd | |
1838 | breq timer_quit | |
1839 | cpi temp,printTimerCmd | |
1840 | breq timer_print | |
1841 | cpi temp,uptimeCmd | |
1842 | brne cp_ex | |
1843 | rjmp uptime_print | |
1844 | cp_ex: | |
1845 | ret | |
1846 | ||
1847 | timer_quit: | |
1848 | rcall timer_print | |
1849 | rjmp timer_start | |
1850 | ||
1851 | clkput_1: | |
1852 | dec temp2 | |
1853 | ldi zl,low(cntms_out) | |
1854 | ldi zh,high(cntms_out) | |
1855 | breq clkput_copy ;lowest byte requestet, latch clock | |
1856 | cpi temp2,6 | |
1857 | brsh clkput_end ;Port number to high? | |
1858 | ||
1859 | add zl,temp2 | |
1860 | brcc PC+2 | |
1861 | inc zh | |
1862 | st z,temp | |
1863 | clkput_end: | |
1864 | ret | |
1865 | ||
1866 | clkput_copy: | |
1867 | st z,temp | |
1868 | adiw z,5 | |
1869 | ldi temp2,6 | |
1870 | cli | |
1871 | clkput_l: | |
1872 | ldd temp,z+clkofs | |
1873 | st z+,temp | |
1874 | dec temp2 | |
1875 | brne clkput_l | |
1876 | sei | |
1877 | ret | |
1878 | ||
1879 | ; start/reset timer | |
1880 | ; | |
1881 | timer_start: | |
1882 | ldi zl,low(timer_ms) | |
1883 | ldi zh,high(timer_ms) | |
1884 | ldi temp2,6 | |
1885 | cli | |
1886 | ts_loop: | |
1887 | ldd temp,z+timerofs | |
1888 | st z+,temp | |
1889 | dec temp2 | |
1890 | brne ts_loop | |
1891 | sei | |
1892 | ret | |
1893 | ||
1894 | ||
1895 | ; print timer | |
1896 | ; | |
1897 | ||
1898 | timer_print: | |
db568140 L |
1899 | push yh |
1900 | push yl | |
37617bd8 L |
1901 | ldi zl,low(timer_ms) |
1902 | ldi zh,high(timer_ms) | |
1903 | ||
1904 | ; put ms on stack (16 bit) | |
1905 | ||
1906 | cli | |
db568140 | 1907 | ldd yl,z+timerofs |
37617bd8 | 1908 | ld temp2,z+ |
db568140 L |
1909 | sub yl,temp2 |
1910 | ldd yh,z+timerofs | |
37617bd8 | 1911 | ld temp2,z+ |
db568140 | 1912 | sbc yh,temp2 |
37617bd8 L |
1913 | brsh tp_s |
1914 | ||
db568140 L |
1915 | subi yl,low(-1000) |
1916 | sbci yh,high(-1000) | |
37617bd8 L |
1917 | sec |
1918 | tp_s: | |
db568140 L |
1919 | push yh |
1920 | push yl | |
37617bd8 | 1921 | |
37617bd8 | 1922 | ldd temp,z+timerofs |
db568140 L |
1923 | ld yl,z+ |
1924 | sbc temp,yl | |
37617bd8 L |
1925 | |
1926 | ldd temp2,z+timerofs | |
db568140 L |
1927 | ld yh,z+ |
1928 | sbc temp2,yh | |
37617bd8 | 1929 | |
db568140 L |
1930 | ldd temp3,z+timerofs |
1931 | ld yl,z+ | |
1932 | sbc temp3,yl | |
fdcfcd44 | 1933 | |
fdcfcd44 | 1934 | sei |
db568140 L |
1935 | ldd temp4,z+timerofs |
1936 | ld yh,z+ | |
1937 | sbc temp4,yh | |
37617bd8 L |
1938 | |
1939 | rcall printstr | |
1940 | .db 13,"Timer running. Elapsed: ",0 | |
1941 | rcall print_ultoa | |
1942 | ||
1943 | rcall printstr | |
db568140 | 1944 | .db ".",0 |
37617bd8 L |
1945 | pop temp |
1946 | pop temp2 | |
db568140 L |
1947 | ldi temp3,0 |
1948 | ldi temp4,0 | |
37617bd8 L |
1949 | rcall print_ultoa |
1950 | rcall printstr | |
29c45e41 | 1951 | .db "s.",0,0 |
37617bd8 | 1952 | |
db568140 L |
1953 | pop yl |
1954 | pop yh | |
fdcfcd44 | 1955 | ret |
37617bd8 L |
1956 | |
1957 | uptime_print: | |
fdcfcd44 | 1958 | |
37617bd8 L |
1959 | ldi zl,low(cnt_1ms) |
1960 | ldi zh,high(cnt_1ms) | |
fdcfcd44 | 1961 | |
37617bd8 L |
1962 | cli |
1963 | ld temp,z+ | |
1964 | push temp | |
1965 | ld temp,z+ | |
1966 | push temp | |
1967 | ||
1968 | ld temp,z+ | |
1969 | ld temp2,z+ | |
db568140 | 1970 | ld temp3,z+ |
37617bd8 | 1971 | sei |
db568140 | 1972 | ld temp4,z+ |
37617bd8 L |
1973 | |
1974 | rcall printstr | |
1975 | .db 13,"Uptime: ",0 | |
1976 | ||
1977 | rcall print_ultoa | |
1978 | rcall printstr | |
1979 | .db ",",0 | |
1980 | ||
db568140 L |
1981 | ldi temp3,0 |
1982 | ldi temp4,0 | |
37617bd8 L |
1983 | pop temp2 |
1984 | pop temp | |
1985 | rcall print_ultoa | |
1986 | rcall printstr | |
1987 | .db "s.",0,0 | |
fdcfcd44 | 1988 | |
37617bd8 | 1989 | ret |
fdcfcd44 L |
1990 | |
1991 | ||
37617bd8 | 1992 | |
fdcfcd44 L |
1993 | ; --------------- Debugging stuff --------------- |
1994 | ||
37617bd8 | 1995 | ;Print a unsigned lonng value to the uart |
db568140 | 1996 | ; temp4:temp3:temp2:temp = value |
37617bd8 L |
1997 | |
1998 | print_ultoa: | |
db568140 L |
1999 | push yh |
2000 | push yl | |
2001 | push z_flags | |
37617bd8 | 2002 | |
db568140 | 2003 | clr yl ;yl = stack level |
37617bd8 | 2004 | |
db568140 L |
2005 | ultoa1: ldi z_flags, 32 ;yh = temp4:temp % 10 |
2006 | clr yh ;temp4:temp /= 10 | |
37617bd8 L |
2007 | ultoa2: lsl temp |
2008 | rol temp2 | |
db568140 L |
2009 | rol temp3 |
2010 | rol temp4 | |
2011 | rol yh | |
2012 | cpi yh,10 | |
37617bd8 | 2013 | brcs ultoa3 |
db568140 | 2014 | subi yh,10 |
37617bd8 | 2015 | inc temp |
db568140 | 2016 | ultoa3: dec z_flags |
37617bd8 | 2017 | brne ultoa2 |
db568140 L |
2018 | cpi yh, 10 ;yh is a numeral digit '0'-'9' |
2019 | subi yh, -'0' | |
2020 | push yh ;Stack it | |
2021 | inc yl | |
2022 | cp temp,_0 ;Repeat until temp4:temp gets zero | |
99ed7199 | 2023 | cpc temp2,_0 |
db568140 L |
2024 | cpc temp3,_0 |
2025 | cpc temp4,_0 | |
37617bd8 | 2026 | brne ultoa1 |
2284d51d L |
2027 | |
2028 | ldi temp, '0' | |
db568140 | 2029 | ultoa5: cpi yl,3 ; at least 3 digits (ms) |
2284d51d L |
2030 | brge ultoa6 |
2031 | push temp | |
db568140 | 2032 | inc yl |
2284d51d | 2033 | rjmp ultoa5 |
37617bd8 L |
2034 | |
2035 | ultoa6: pop temp ;Flush stacked digits | |
2036 | rcall uartputc | |
db568140 | 2037 | dec yl |
37617bd8 L |
2038 | brne ultoa6 |
2039 | ||
db568140 L |
2040 | pop z_flags |
2041 | pop yl | |
2042 | pop yh | |
37617bd8 L |
2043 | ret |
2044 | ||
2045 | ||
fdcfcd44 L |
2046 | ;Prints the lower nibble of temp in hex to the uart |
2047 | printhexn: | |
2048 | push temp | |
2049 | andi temp,0xf | |
2050 | cpi temp,0xA | |
2051 | brlo printhexn_isno | |
2052 | subi temp,-('A'-10) | |
2053 | rcall uartputc | |
2054 | pop temp | |
2055 | ret | |
2056 | printhexn_isno: | |
2057 | subi temp,-'0' | |
2058 | rcall uartputc | |
2059 | pop temp | |
2060 | ret | |
2061 | ||
2062 | ;Prints temp in hex to the uart | |
2063 | printhex: | |
2064 | swap temp | |
2065 | rcall printhexn | |
2066 | swap temp | |
2067 | rcall printhexn | |
2068 | ret | |
2069 | ||
db568140 L |
2070 | ;Prints the zero-terminated string following the call statement. |
2071 | ||
fdcfcd44 | 2072 | printstr: |
db568140 L |
2073 | push zh |
2074 | push zl | |
2075 | push r29 | |
2076 | push r28 | |
2077 | push temp | |
2078 | in r29,sph | |
2079 | in r28,spl | |
2080 | ldd zl,y+7 | |
2081 | ldd zh,y+6 | |
fdcfcd44 L |
2082 | |
2083 | lsl zl | |
2084 | rol zh | |
fdcfcd44 L |
2085 | printstr_loop: |
2086 | lpm temp,z+ | |
2087 | cpi temp,0 | |
2088 | breq printstr_end | |
2089 | rcall uartputc | |
2090 | cpi temp,13 | |
2091 | brne printstr_loop | |
2092 | ldi temp,10 | |
2093 | rcall uartputc | |
2094 | rjmp printstr_loop | |
2095 | ||
2096 | printstr_end: | |
2097 | adiw zl,1 | |
2098 | lsr zh | |
2099 | ror zl | |
2100 | ||
db568140 L |
2101 | std y+7,zl |
2102 | std y+6,zh | |
2103 | pop temp | |
2104 | pop r28 | |
2105 | pop r29 | |
2106 | pop zl | |
2107 | pop zh | |
fdcfcd44 L |
2108 | ret |
2109 | ||
fdcfcd44 L |
2110 | ; --------------- AVR HW <-> Z80 periph stuff ------------------ |
2111 | ||
2112 | .equ memReadByte = dram_read | |
2113 | .equ memWriteByte = dram_write | |
99ed7199 L |
2114 | #if DRAM_WORD_ACCESS |
2115 | .equ memReadWord = dram_read_w | |
2116 | .equ memWriteWord = dram_write_w | |
2117 | #endif | |
fdcfcd44 | 2118 | |
37617bd8 | 2119 | ; -------------------------------------------------------------- |
fdcfcd44 | 2120 | |
37617bd8 L |
2121 | .dseg |
2122 | ||
2123 | #define RXBUFMASK RXBUFSIZE-1 | |
2124 | ||
2125 | rxcount: | |
2126 | .byte 1 | |
2127 | rxidx_w: | |
2128 | .byte 1 | |
2129 | rxidx_r: | |
2130 | .byte 1 | |
2131 | rxfifo: | |
2132 | .byte RXBUFSIZE | |
2133 | .byte 0 | |
2134 | ||
2135 | .cseg | |
2136 | ||
2137 | ; Save received character in a circular buffer. Do nothing if buffer overflows. | |
2138 | ||
2139 | rxint: | |
2140 | push temp | |
2141 | in temp,sreg | |
2142 | push temp | |
2143 | push zh | |
2144 | push zl | |
2145 | #ifdef __ATmega8__ | |
2146 | in temp,UDR | |
3c3744f1 | 2147 | #else |
37617bd8 | 2148 | lds temp,UDR0 |
3c3744f1 | 2149 | #endif |
2284d51d L |
2150 | lds zh,rxcount ;if rxcount < RXBUFSIZE |
2151 | cpi zh,RXBUFSIZE ; (room for at least 1 char?) | |
2152 | brsh rxi_ov ; | |
2153 | inc zh ; | |
2154 | sts rxcount,zh ; rxcount++ | |
2155 | ||
2156 | ldi zl,low(rxfifo) ; | |
2157 | lds zh,rxidx_w ; | |
2158 | add zl,zh ; | |
2159 | inc zh ; | |
2160 | andi zh,RXBUFMASK ; | |
2161 | sts rxidx_w,zh ; rxidx_w = ++rxidx_w % RXBUFSIZE | |
2162 | ldi zh,high(rxfifo) ; | |
2163 | brcc PC+2 ; | |
2164 | inc zh ; | |
2165 | st z,temp ; rxfifo[rxidx_w] = char | |
2166 | rxi_ov: ;endif | |
37617bd8 L |
2167 | pop zl |
2168 | pop zh | |
2169 | pop temp | |
2170 | out sreg,temp | |
2171 | pop temp | |
2172 | reti | |
2173 | ||
2174 | ||
2175 | ;Fetches a char from the buffer to temp. If none available, waits till one is. | |
2176 | ||
2177 | uartgetc: | |
2178 | lds temp,rxcount ; Number of characters in buffer | |
2179 | tst temp | |
2180 | breq uartgetc | |
2181 | ||
2182 | push zh | |
2183 | push zl | |
2184 | ldi zl,low(rxfifo) | |
2185 | ldi zh,high(rxfifo) | |
2186 | lds temp,rxidx_r | |
2187 | add zl,temp | |
2188 | brcc PC+2 | |
2189 | inc zh | |
2190 | inc temp | |
2191 | andi temp,RXBUFMASK | |
2192 | sts rxidx_r,temp | |
2193 | cli | |
2194 | lds temp,rxcount | |
2195 | dec temp | |
2196 | sts rxcount,temp | |
2197 | sei | |
2198 | ld temp,z ;don't forget to get the char | |
2199 | pop zl | |
2200 | pop zh | |
fdcfcd44 L |
2201 | ret |
2202 | ||
37617bd8 L |
2203 | |
2204 | ||
fdcfcd44 L |
2205 | ;Sends a char from temp to the uart. |
2206 | uartputc: | |
3c3744f1 L |
2207 | #if defined __ATmega8__ |
2208 | uartputc_l: | |
2209 | sbis UCSRA,UDRE | |
2210 | rjmp uartputc_l | |
2211 | out UDR,temp | |
2212 | #else | |
fdcfcd44 L |
2213 | push temp |
2214 | uartputc_l: | |
3c3744f1 L |
2215 | lds temp,UCSR0A |
2216 | sbrs temp,UDRE0 | |
fdcfcd44 L |
2217 | rjmp uartputc_l |
2218 | pop temp | |
3c3744f1 L |
2219 | sts UDR0,temp |
2220 | #endif | |
fdcfcd44 L |
2221 | ret |
2222 | ||
2223 | ; ------------ Fetch phase stuff ----------------- | |
2224 | ||
2225 | .equ FETCH_NOP = (0<<0) | |
2226 | .equ FETCH_A = (1<<0) | |
2227 | .equ FETCH_B = (2<<0) | |
2228 | .equ FETCH_C = (3<<0) | |
2229 | .equ FETCH_D = (4<<0) | |
2230 | .equ FETCH_E = (5<<0) | |
2231 | .equ FETCH_H = (6<<0) | |
2232 | .equ FETCH_L = (7<<0) | |
2233 | .equ FETCH_AF = (8<<0) | |
2234 | .equ FETCH_BC = (9<<0) | |
2235 | .equ FETCH_DE = (10<<0) | |
2236 | .equ FETCH_HL = (11<<0) | |
2237 | .equ FETCH_SP = (12<<0) | |
2238 | .equ FETCH_MBC = (13<<0) | |
2239 | .equ FETCH_MDE = (14<<0) | |
2240 | .equ FETCH_MHL = (15<<0) | |
2241 | .equ FETCH_MSP = (16<<0) | |
2242 | .equ FETCH_DIR8 = (17<<0) | |
2243 | .equ FETCH_DIR16= (18<<0) | |
2244 | .equ FETCH_RST = (19<<0) | |
2245 | ||
2246 | ||
2247 | ;Jump table for fetch routines. Make sure to keep this in sync with the .equs! | |
2248 | fetchjumps: | |
99ed7199 L |
2249 | rjmp do_fetch_nop |
2250 | rjmp do_fetch_a | |
2251 | rjmp do_fetch_b | |
2252 | rjmp do_fetch_c | |
2253 | rjmp do_fetch_d | |
2254 | rjmp do_fetch_e | |
2255 | rjmp do_fetch_h | |
2256 | rjmp do_fetch_l | |
2257 | rjmp do_fetch_af | |
2258 | rjmp do_fetch_bc | |
2259 | rjmp do_fetch_de | |
2260 | rjmp do_fetch_hl | |
2261 | rjmp do_fetch_sp | |
2262 | rjmp do_fetch_mbc | |
2263 | rjmp do_fetch_mde | |
2264 | rjmp do_fetch_mhl | |
2265 | rjmp do_fetch_msp | |
2266 | rjmp do_fetch_dir8 | |
2267 | rjmp do_fetch_dir16 | |
2268 | rjmp do_fetch_rst | |
fdcfcd44 L |
2269 | |
2270 | do_fetch_nop: | |
2271 | ret | |
2272 | ||
2273 | do_fetch_a: | |
2274 | mov opl,z_a | |
2275 | ret | |
2276 | ||
2277 | do_fetch_b: | |
2278 | mov opl,z_b | |
2279 | ret | |
2280 | ||
2281 | do_fetch_c: | |
2282 | mov opl,z_c | |
2283 | ret | |
2284 | ||
2285 | do_fetch_d: | |
2286 | mov opl,z_d | |
2287 | ret | |
2288 | ||
2289 | do_fetch_e: | |
2290 | mov opl,z_e | |
2291 | ret | |
2292 | ||
2293 | do_fetch_h: | |
2294 | mov opl,z_h | |
2295 | ret | |
2296 | ||
2297 | do_fetch_l: | |
2298 | mov opl,z_l | |
2299 | ret | |
2300 | ||
2301 | do_fetch_af: | |
2302 | mov opl,z_flags | |
2303 | mov oph,z_a | |
fdcfcd44 L |
2304 | ret |
2305 | ||
2306 | do_fetch_bc: | |
db568140 | 2307 | movw opl,z_c |
fdcfcd44 L |
2308 | ret |
2309 | ||
2310 | do_fetch_de: | |
db568140 | 2311 | movw opl,z_e |
fdcfcd44 L |
2312 | ret |
2313 | ||
2314 | do_fetch_hl: | |
db568140 | 2315 | movw opl,z_l |
fdcfcd44 L |
2316 | ret |
2317 | ||
2318 | do_fetch_sp: | |
99ed7199 | 2319 | movw opl,z_spl |
fdcfcd44 L |
2320 | ret |
2321 | ||
2322 | do_fetch_mbc: | |
db568140 | 2323 | movw adrl,z_c |
fdcfcd44 L |
2324 | rcall memReadByte |
2325 | mov opl,temp | |
2326 | ret | |
2327 | ||
2328 | do_fetch_mde: | |
db568140 | 2329 | movw adrl,z_e |
fdcfcd44 L |
2330 | rcall memReadByte |
2331 | mov opl,temp | |
2332 | ret | |
2333 | ||
2334 | do_fetch_mhl: | |
db568140 | 2335 | movw adrl,z_l |
fdcfcd44 L |
2336 | rcall memReadByte |
2337 | mov opl,temp | |
2338 | ret | |
2339 | ||
2340 | do_fetch_msp: | |
99ed7199 L |
2341 | movw adrl,z_spl |
2342 | #if DRAM_WORD_ACCESS | |
2343 | rcall memReadWord | |
2344 | movw opl,temp | |
2345 | #else | |
fdcfcd44 L |
2346 | rcall memReadByte |
2347 | mov opl,temp | |
99ed7199 | 2348 | adiw adrl,1 |
fdcfcd44 L |
2349 | rcall memReadByte |
2350 | mov oph,temp | |
99ed7199 | 2351 | #endif |
fdcfcd44 L |
2352 | ret |
2353 | ||
2354 | do_fetch_dir8: | |
99ed7199 | 2355 | movw adrl,z_pcl |
fdcfcd44 L |
2356 | rcall memReadByte |
2357 | adiw z_pcl,1 | |
2358 | mov opl,temp | |
2359 | ret | |
2360 | ||
2361 | do_fetch_dir16: | |
99ed7199 L |
2362 | movw adrl,z_pcl |
2363 | #if DRAM_WORD_ACCESS | |
2364 | rcall memReadWord | |
2365 | movw opl,temp | |
2366 | #else | |
fdcfcd44 L |
2367 | rcall memReadByte |
2368 | mov opl,temp | |
99ed7199 | 2369 | adiw adrl,1 |
fdcfcd44 | 2370 | rcall memReadByte |
fdcfcd44 | 2371 | mov oph,temp |
99ed7199 L |
2372 | #endif |
2373 | adiw z_pcl,2 | |
fdcfcd44 L |
2374 | ret |
2375 | ||
2376 | do_fetch_rst: | |
99ed7199 | 2377 | movw adrl,z_pcl |
37617bd8 L |
2378 | subi adrl,1 |
2379 | sbci adrh,0 | |
fdcfcd44 L |
2380 | rcall memReadByte |
2381 | andi temp,0x38 | |
2382 | ldi oph,0 | |
2383 | mov opl,temp | |
2384 | ret | |
2385 | ||
2386 | ||
2387 | ||
2388 | ; ------------ Store phase stuff ----------------- | |
2389 | ||
2390 | .equ STORE_NOP = (0<<5) | |
2391 | .equ STORE_A = (1<<5) | |
2392 | .equ STORE_B = (2<<5) | |
2393 | .equ STORE_C = (3<<5) | |
2394 | .equ STORE_D = (4<<5) | |
2395 | .equ STORE_E = (5<<5) | |
2396 | .equ STORE_H = (6<<5) | |
2397 | .equ STORE_L = (7<<5) | |
2398 | .equ STORE_AF = (8<<5) | |
2399 | .equ STORE_BC = (9<<5) | |
2400 | .equ STORE_DE = (10<<5) | |
2401 | .equ STORE_HL = (11<<5) | |
2402 | .equ STORE_SP = (12<<5) | |
2403 | .equ STORE_PC = (13<<5) | |
2404 | .equ STORE_MBC = (14<<5) | |
2405 | .equ STORE_MDE = (15<<5) | |
2406 | .equ STORE_MHL = (16<<5) | |
2407 | .equ STORE_MSP = (17<<5) | |
2408 | .equ STORE_RET = (18<<5) | |
2409 | .equ STORE_CALL = (19<<5) | |
2410 | .equ STORE_AM = (20<<5) | |
2411 | ||
2412 | ;Jump table for store routines. Make sure to keep this in sync with the .equs! | |
2413 | storejumps: | |
99ed7199 L |
2414 | rjmp do_store_nop |
2415 | rjmp do_store_a | |
2416 | rjmp do_store_b | |
2417 | rjmp do_store_c | |
2418 | rjmp do_store_d | |
2419 | rjmp do_store_e | |
2420 | rjmp do_store_h | |
2421 | rjmp do_store_l | |
2422 | rjmp do_store_af | |
2423 | rjmp do_store_bc | |
2424 | rjmp do_store_de | |
2425 | rjmp do_store_hl | |
2426 | rjmp do_store_sp | |
2427 | rjmp do_store_pc | |
2428 | rjmp do_store_mbc | |
2429 | rjmp do_store_mde | |
2430 | rjmp do_store_mhl | |
2431 | rjmp do_store_msp | |
2432 | rjmp do_store_ret | |
2433 | rjmp do_store_call | |
2434 | rjmp do_store_am | |
fdcfcd44 L |
2435 | |
2436 | ||
2437 | do_store_nop: | |
2438 | ret | |
2439 | ||
2440 | do_store_a: | |
2441 | mov z_a,opl | |
2442 | ret | |
2443 | ||
2444 | do_store_b: | |
2445 | mov z_b,opl | |
2446 | ret | |
2447 | ||
2448 | do_store_c: | |
2449 | mov z_c,opl | |
2450 | ret | |
2451 | ||
2452 | do_store_d: | |
2453 | mov z_d,opl | |
2454 | ret | |
2455 | ||
2456 | do_store_e: | |
2457 | mov z_e,opl | |
2458 | ret | |
2459 | ||
2460 | do_store_h: | |
2461 | mov z_h,opl | |
2462 | ret | |
2463 | ||
2464 | do_store_l: | |
2465 | mov z_l,opl | |
2466 | ret | |
2467 | ||
2468 | do_store_af: | |
2469 | mov z_a,oph | |
2470 | mov z_flags,opl | |
fdcfcd44 L |
2471 | ret |
2472 | ||
2473 | do_store_bc: | |
2474 | mov z_b,oph | |
2475 | mov z_c,opl | |
2476 | ret | |
2477 | ||
2478 | do_store_de: | |
2479 | mov z_d,oph | |
2480 | mov z_e,opl | |
2481 | ret | |
2482 | ||
2483 | do_store_hl: | |
2484 | mov z_h,oph | |
2485 | mov z_l,opl | |
2486 | ret | |
2487 | ||
2488 | do_store_mbc: | |
db568140 | 2489 | movw adrl,z_c |
fdcfcd44 L |
2490 | mov temp,opl |
2491 | rcall memWriteByte | |
2492 | ret | |
2493 | ||
2494 | do_store_mde: | |
db568140 | 2495 | movw adrl,z_e |
fdcfcd44 L |
2496 | mov temp,opl |
2497 | rcall memWriteByte | |
2498 | ret | |
2499 | ||
2500 | do_store_mhl: | |
db568140 | 2501 | movw adrl,z_l |
fdcfcd44 L |
2502 | mov temp,opl |
2503 | rcall memWriteByte | |
2504 | ret | |
2505 | ||
2506 | do_store_msp: | |
99ed7199 L |
2507 | movw adrl,z_spl |
2508 | #if DRAM_WORD_ACCESS | |
2509 | movw temp,opl | |
2510 | rcall memWriteWord | |
2511 | #else | |
fdcfcd44 L |
2512 | mov temp,opl |
2513 | rcall memWriteByte | |
99ed7199 | 2514 | adiw adrl,1 |
fdcfcd44 L |
2515 | mov temp,oph |
2516 | rcall memWriteByte | |
99ed7199 | 2517 | #endif |
fdcfcd44 L |
2518 | ret |
2519 | ||
2520 | do_store_sp: | |
99ed7199 | 2521 | movw z_spl,opl |
fdcfcd44 L |
2522 | ret |
2523 | ||
2524 | do_store_pc: | |
99ed7199 | 2525 | movw z_pcl,opl |
fdcfcd44 L |
2526 | ret |
2527 | ||
2528 | do_store_ret: | |
2529 | rcall do_op_pop16 | |
99ed7199 | 2530 | movw z_pcl,opl |
fdcfcd44 L |
2531 | ret |
2532 | ||
2533 | do_store_call: | |
2534 | push opl | |
2535 | push oph | |
99ed7199 | 2536 | movw opl,z_pcl |
fdcfcd44 L |
2537 | rcall do_op_push16 |
2538 | pop z_pch | |
2539 | pop z_pcl | |
2540 | ret | |
2541 | ||
2542 | do_store_am: | |
99ed7199 | 2543 | movw adrl,opl |
fdcfcd44 L |
2544 | mov temp,z_a |
2545 | rcall memWriteByte | |
2546 | ret | |
2547 | ||
2548 | ||
2549 | ; ------------ Operation phase stuff ----------------- | |
2550 | ||
2551 | ||
2552 | .equ OP_NOP = (0<<10) | |
2553 | .equ OP_INC = (1<<10) | |
2554 | .equ OP_DEC = (2<<10) | |
2555 | .equ OP_INC16 = (3<<10) | |
2556 | .equ OP_DEC16 = (4<<10) | |
2557 | .equ OP_RLC = (5<<10) | |
2558 | .equ OP_RRC = (6<<10) | |
2559 | .equ OP_RR = (7<<10) | |
2560 | .equ OP_RL = (8<<10) | |
2561 | .equ OP_ADDA = (9<<10) | |
2562 | .equ OP_ADCA = (10<<10) | |
2563 | .equ OP_SUBFA = (11<<10) | |
2564 | .equ OP_SBCFA = (12<<10) | |
2565 | .equ OP_ANDA = (13<<10) | |
2566 | .equ OP_ORA = (14<<10) | |
2567 | .equ OP_XORA = (15<<10) | |
2568 | .equ OP_ADDHL = (16<<10) | |
2569 | .equ OP_STHL = (17<<10) ;store HL in fetched address | |
2570 | .equ OP_RMEM16 = (18<<10) ;read mem at fetched address | |
2571 | .equ OP_RMEM8 = (19<<10) ;read mem at fetched address | |
2572 | .equ OP_DA = (20<<10) | |
2573 | .equ OP_SCF = (21<<10) | |
2574 | .equ OP_CPL = (22<<10) | |
2575 | .equ OP_CCF = (23<<10) | |
2576 | .equ OP_POP16 = (24<<10) | |
2577 | .equ OP_PUSH16 = (25<<10) | |
2578 | .equ OP_IFNZ = (26<<10) | |
2579 | .equ OP_IFZ = (27<<10) | |
2580 | .equ OP_IFNC = (28<<10) | |
2581 | .equ OP_IFC = (29<<10) | |
2582 | .equ OP_IFPO = (30<<10) | |
2583 | .equ OP_IFPE = (31<<10) | |
2584 | .equ OP_IFP = (32<<10) | |
2585 | .equ OP_IFM = (33<<10) | |
2586 | .equ OP_OUTA = (34<<10) | |
2587 | .equ OP_IN = (35<<10) | |
2588 | .equ OP_EXHL = (36<<10) | |
2589 | .equ OP_DI = (37<<10) | |
2590 | .equ OP_EI = (38<<10) | |
2591 | .equ OP_INV = (39<<10) | |
2592 | ||
2593 | opjumps: | |
99ed7199 L |
2594 | rjmp do_op_nop |
2595 | rjmp do_op_inc | |
2596 | rjmp do_op_dec | |
2597 | rjmp do_op_inc16 | |
2598 | rjmp do_op_dec16 | |
2599 | rjmp do_op_rlc | |
2600 | rjmp do_op_rrc | |
2601 | rjmp do_op_rr | |
2602 | rjmp do_op_rl | |
2603 | rjmp do_op_adda | |
2604 | rjmp do_op_adca | |
2605 | rjmp do_op_subfa | |
2606 | rjmp do_op_sbcfa | |
2607 | rjmp do_op_anda | |
2608 | rjmp do_op_ora | |
2609 | rjmp do_op_xora | |
2610 | rjmp do_op_addhl | |
2611 | rjmp do_op_sthl | |
2612 | rjmp do_op_rmem16 | |
2613 | rjmp do_op_rmem8 | |
2614 | rjmp do_op_da | |
2615 | rjmp do_op_scf | |
2616 | rjmp do_op_cpl | |
2617 | rjmp do_op_ccf | |
2618 | rjmp do_op_pop16 | |
2619 | rjmp do_op_push16 | |
2620 | rjmp do_op_ifnz | |
2621 | rjmp do_op_ifz | |
2622 | rjmp do_op_ifnc | |
2623 | rjmp do_op_ifc | |
2624 | rjmp do_op_ifpo | |
2625 | rjmp do_op_ifpe | |
2626 | rjmp do_op_ifp | |
2627 | rjmp do_op_ifm | |
2628 | rjmp do_op_outa | |
2629 | rjmp do_op_in | |
2630 | rjmp do_op_exhl | |
2631 | rjmp do_op_di | |
2632 | rjmp do_op_ei | |
2633 | rjmp do_op_inv | |
fdcfcd44 L |
2634 | |
2635 | ||
2636 | ;How the flags are supposed to work: | |
2637 | ;7 ZFL_S - Sign flag (=MSBit of result) | |
2638 | ;6 ZFL_Z - Zero flag. Is 1 when the result is 0 | |
2639 | ;4 ZFL_H - Half-carry (carry from bit 3 to 4) | |
2640 | ;2 ZFL_P - Parity/2-complement Overflow | |
2641 | ;1 ZFL_N - Subtract - set if last op was a subtract | |
2642 | ;0 ZFL_C - Carry | |
2643 | ; | |
2644 | ;I sure hope I got the mapping between flags and instructions correct... | |
2645 | ||
3c3744f1 L |
2646 | ;---------------------------------------------------------------- |
2647 | ;| | | |
2648 | ;| Zilog | | |
2649 | ;| | | |
2650 | ;| ZZZZZZZ 88888 000 | | |
2651 | ;| Z 8 8 0 0 | | |
2652 | ;| Z 8 8 0 0 0 | | |
2653 | ;| Z 88888 0 0 0 | | |
2654 | ;| Z 8 8 0 0 0 | | |
2655 | ;| Z 8 8 0 0 | | |
2656 | ;| ZZZZZZZ 88888 000 | | |
2657 | ;| | | |
2658 | ;| Z80 MICROPROCESSOR Instruction Set Summary | | |
2659 | ;| | | |
2660 | ;---------------------------------------------------------------- | |
2661 | ;---------------------------------------------------------------- | |
2662 | ;|Mnemonic |SZHPNC|Description |Notes | | |
2663 | ;|----------+------+---------------------+----------------------| | |
2664 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | | |
2665 | ;|ADC HL,ss |**?V0*|Add with Carry |HL=HL+ss+CY | | |
2666 | ;|ADD A,s |***V0*|Add |A=A+s | | |
2667 | ;|ADD HL,ss |--?-0*|Add |HL=HL+ss | | |
2668 | ;|ADD IX,pp |--?-0*|Add |IX=IX+pp | | |
2669 | ;|ADD IY,rr |--?-0*|Add |IY=IY+rr | | |
37617bd8 | 2670 | ;|AND s |**1P00|Logical AND |A=A&s | |
3c3744f1 L |
2671 | ;|BIT b,m |?*1?0-|Test Bit |m&{2^b} | |
2672 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
2673 | ;|CALL nn |------|Unconditional Call |-[SP]=PC,PC=nn | | |
2674 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY | | |
2675 | ;|CP s |***V1*|Compare |A-s | | |
2676 | ;|CPD |****1-|Compare and Decrement|A-[HL],HL=HL-1,BC=BC-1| | |
2677 | ;|CPDR |****1-|Compare, Dec., Repeat|CPD till A=[HL]or BC=0| | |
2678 | ;|CPI |****1-|Compare and Increment|A-[HL],HL=HL+1,BC=BC-1| | |
2679 | ;|CPIR |****1-|Compare, Inc., Repeat|CPI till A=[HL]or BC=0| | |
2680 | ;|CPL |--1-1-|Complement |A=~A | | |
2681 | ;|DAA |***P-*|Decimal Adjust Acc. |A=BCD format | | |
2682 | ;|DEC s |***V1-|Decrement |s=s-1 | | |
2683 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
2684 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
2685 | ;|DI |------|Disable Interrupts | | | |
2686 | ;|DJNZ e |------|Dec., Jump Non-Zero |B=B-1 till B=0 | | |
2687 | ;|EI |------|Enable Interrupts | | | |
2688 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | | |
2689 | ;|EX [SP],xx|------|Exchange |[SP]<->xx | | |
2690 | ;|EX AF,AF' |------|Exchange |AF<->AF' | | |
2691 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
2692 | ;|EXX |------|Exchange |qq<->qq' (except AF)| | |
2693 | ;|HALT |------|Halt | | | |
2694 | ;|IM n |------|Interrupt Mode | (n=0,1,2)| | |
2695 | ;|IN A,[n] |------|Input |A=[n] | | |
2696 | ;|IN r,[C] |***P0-|Input |r=[C] | | |
2697 | ;|INC r |***V0-|Increment |r=r+1 | | |
2698 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
2699 | ;|INC xx |------|Increment |xx=xx+1 | | |
2700 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
2701 | ;|INC ss |------|Increment |ss=ss+1 | | |
2702 | ;|IND |?*??1-|Input and Decrement |[HL]=[C],HL=HL-1,B=B-1| | |
2703 | ;|INDR |?1??1-|Input, Dec., Repeat |IND till B=0 | | |
2704 | ;|INI |?*??1-|Input and Increment |[HL]=[C],HL=HL+1,B=B-1| | |
2705 | ;|INIR |?1??1-|Input, Inc., Repeat |INI till B=0 | | |
2706 | ;|JP [HL] |------|Unconditional Jump |PC=[HL] | | |
2707 | ;|JP [xx] |------|Unconditional Jump |PC=[xx] | | |
2708 | ;|JP nn |------|Unconditional Jump |PC=nn | | |
2709 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
2710 | ;|JR e |------|Unconditional Jump |PC=PC+e | | |
2711 | ;|JR cc,e |------|Conditional Jump |If cc JR(cc=C,NC,NZ,Z)| | |
2712 | ;|LD dst,src|------|Load |dst=src | | |
2713 | ;|LD A,i |**0*0-|Load |A=i (i=I,R)| | |
2714 | ;|LDD |--0*0-|Load and Decrement |[DE]=[HL],HL=HL-1,# | | |
2715 | ;|LDDR |--000-|Load, Dec., Repeat |LDD till BC=0 | | |
2716 | ;|LDI |--0*0-|Load and Increment |[DE]=[HL],HL=HL+1,# | | |
2717 | ;|LDIR |--000-|Load, Inc., Repeat |LDI till BC=0 | | |
2718 | ;|NEG |***V1*|Negate |A=-A | | |
2719 | ;|NOP |------|No Operation | | | |
37617bd8 | 2720 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | |
3c3744f1 L |
2721 | ;|OTDR |?1??1-|Output, Dec., Repeat |OUTD till B=0 | |
2722 | ;|OTIR |?1??1-|Output, Inc., Repeat |OUTI till B=0 | | |
2723 | ;|OUT [C],r |------|Output |[C]=r | | |
2724 | ;|OUT [n],A |------|Output |[n]=A | | |
2725 | ;|OUTD |?*??1-|Output and Decrement |[C]=[HL],HL=HL-1,B=B-1| | |
2726 | ;|OUTI |?*??1-|Output and Increment |[C]=[HL],HL=HL+1,B=B-1| | |
2727 | ;|POP xx |------|Pop |xx=[SP]+ | | |
2728 | ;|POP qq |------|Pop |qq=[SP]+ | | |
2729 | ;|PUSH xx |------|Push |-[SP]=xx | | |
2730 | ;|PUSH qq |------|Push |-[SP]=qq | | |
2731 | ;|RES b,m |------|Reset bit |m=m&{~2^b} | | |
2732 | ;|RET |------|Return |PC=[SP]+ | | |
2733 | ;|RET cc |------|Conditional Return |If cc RET | | |
2734 | ;|RETI |------|Return from Interrupt|PC=[SP]+ | | |
2735 | ;|RETN |------|Return from NMI |PC=[SP]+ | | |
2736 | ;|RL m |**0P0*|Rotate Left |m={CY,m}<- | | |
2737 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | | |
2738 | ;|RLC m |**0P0*|Rotate Left Circular |m=m<- | | |
2739 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
3c3744f1 L |
2740 | ;|RLD |**0P0-|Rotate Left 4 bits |{A,[HL]}={A,[HL]}<- ##| |
2741 | ;|RR m |**0P0*|Rotate Right |m=->{CY,m} | | |
2742 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
2743 | ;|RRC m |**0P0*|Rotate Right Circular|m=->m | | |
2744 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
2745 | ;|RRD |**0P0-|Rotate Right 4 bits |{A,[HL]}=->{A,[HL]} ##| | |
2746 | ;|RST p |------|Restart | (p=0H,8H,10H,...,38H)| | |
2747 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | | |
2748 | ;|SBC HL,ss |**?V1*|Subtract with Carry |HL=HL-ss-CY | | |
2749 | ;|SCF |--0-01|Set Carry Flag |CY=1 | | |
2750 | ;|SET b,m |------|Set bit |m=mv{2^b} | | |
2751 | ;|SLA m |**0P0*|Shift Left Arithmetic|m=m*2 | | |
2752 | ;|SRA m |**0P0*|Shift Right Arith. |m=m/2 | | |
2753 | ;|SRL m |**0P0*|Shift Right Logical |m=->{0,m,CY} | | |
2754 | ;|SUB s |***V1*|Subtract |A=A-s | | |
37617bd8 | 2755 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | |
3c3744f1 | 2756 | ;|----------+------+--------------------------------------------| |
99ed7199 L |
2757 | ;| F |-*01? |Flag unaffected/affected/reset/set/unknown | |
2758 | ;| S |S |Sign flag (Bit 7) | | |
2759 | ;| Z | Z |Zero flag (Bit 6) | | |
2760 | ;| HC | H |Half Carry flag (Bit 4) | | |
2761 | ;| P/V | P |Parity/Overflow flag (Bit 2, V=overflow) | | |
2762 | ;| N | N |Add/Subtract flag (Bit 1) | | |
2763 | ;| CY | C|Carry flag (Bit 0) | | |
2764 | ;|-----------------+--------------------------------------------| | |
2765 | ;| n |Immediate addressing | | |
2766 | ;| nn |Immediate extended addressing | | |
2767 | ;| e |Relative addressing (PC=PC+2+offset) | | |
2768 | ;| [nn] |Extended addressing | | |
2769 | ;| [xx+d] |Indexed addressing | | |
2770 | ;| r |Register addressing | | |
2771 | ;| [rr] |Register indirect addressing | | |
2772 | ;| |Implied addressing | | |
2773 | ;| b |Bit addressing | | |
2774 | ;| p |Modified page zero addressing (see RST) | | |
2775 | ;|-----------------+--------------------------------------------| | |
2776 | ;|DEFB n(,...) |Define Byte(s) | | |
2777 | ;|DEFB 'str'(,...) |Define Byte ASCII string(s) | | |
2778 | ;|DEFS nn |Define Storage Block | | |
2779 | ;|DEFW nn(,...) |Define Word(s) | | |
2780 | ;|-----------------+--------------------------------------------| | |
2781 | ;| A B C D E |Registers (8-bit) | | |
2782 | ;| AF BC DE HL |Register pairs (16-bit) | | |
2783 | ;| F |Flag register (8-bit) | | |
2784 | ;| I |Interrupt page address register (8-bit) | | |
2785 | ;| IX IY |Index registers (16-bit) | | |
2786 | ;| PC |Program Counter register (16-bit) | | |
2787 | ;| R |Memory Refresh register | | |
2788 | ;| SP |Stack Pointer register (16-bit) | | |
2789 | ;|-----------------+--------------------------------------------| | |
2790 | ;| b |One bit (0 to 7) | | |
2791 | ;| cc |Condition (C,M,NC,NZ,P,PE,PO,Z) | | |
2792 | ;| d |One-byte expression (-128 to +127) | | |
2793 | ;| dst |Destination s, ss, [BC], [DE], [HL], [nn] | | |
2794 | ;| e |One-byte expression (-126 to +129) | | |
2795 | ;| m |Any register r, [HL] or [xx+d] | | |
2796 | ;| n |One-byte expression (0 to 255) | | |
2797 | ;| nn |Two-byte expression (0 to 65535) | | |
2798 | ;| pp |Register pair BC, DE, IX or SP | | |
2799 | ;| qq |Register pair AF, BC, DE or HL | | |
2800 | ;| qq' |Alternative register pair AF, BC, DE or HL | | |
2801 | ;| r |Register A, B, C, D, E, H or L | | |
2802 | ;| rr |Register pair BC, DE, IY or SP | | |
2803 | ;| s |Any register r, value n, [HL] or [xx+d] | | |
2804 | ;| src |Source s, ss, [BC], [DE], [HL], nn, [nn] | | |
2805 | ;| ss |Register pair BC, DE, HL or SP | | |
2806 | ;| xx |Index register IX or IY | | |
2807 | ;|-----------------+--------------------------------------------| | |
2808 | ;| + - * / ^ |Add/subtract/multiply/divide/exponent | | |
2809 | ;| & ~ v x |Logical AND/NOT/inclusive OR/exclusive OR | | |
2810 | ;| <- -> |Rotate left/right | | |
2811 | ;| [ ] |Indirect addressing | | |
2812 | ;| [ ]+ -[ ] |Indirect addressing auto-increment/decrement| | |
2813 | ;| { } |Combination of operands | | |
2814 | ;| # |Also BC=BC-1,DE=DE-1 | | |
2815 | ;| ## |Only lower 4 bits of accumulator A used | | |
2816 | ;---------------------------------------------------------------- | |
fdcfcd44 | 2817 | |
37617bd8 L |
2818 | |
2819 | .equ AVR_T = 6 | |
fdcfcd44 L |
2820 | .equ AVR_H = 5 |
2821 | .equ AVR_S = 4 | |
2822 | .equ AVR_V = 3 | |
2823 | .equ AVR_N = 2 | |
2824 | .equ AVR_Z = 1 | |
2825 | .equ AVR_C = 0 | |
2826 | ||
37617bd8 L |
2827 | ;------------------------------------------------; |
2828 | ; Move single bit between two registers | |
2829 | ; | |
2830 | ; bmov dstreg,dstbit,srcreg.srcbit | |
2831 | ||
2832 | .macro bmov | |
2833 | bst @2,@3 | |
2834 | bld @0,@1 | |
2835 | .endm | |
2836 | ||
2837 | ||
2838 | ;------------------------------------------------; | |
2839 | ; Load table value from flash indexed by source reg. | |
2840 | ; | |
2841 | ; ldpmx dstreg,tablebase,indexreg | |
2842 | ; | |
2843 | ; (6 words, 8 cycles) | |
2844 | ||
2845 | .macro ldpmx | |
99ed7199 L |
2846 | ldi zh,high(@1*2) ; table must be page aligned |
2847 | mov zl,@2 | |
37617bd8 L |
2848 | lpm @0,z |
2849 | .endm | |
37617bd8 L |
2850 | .macro do_z80_flags_HP |
2851 | #if EM_Z80 | |
2852 | bmov z_flags, ZFL_P, temp, AVR_V | |
2853 | bmov z_flags, ZFL_H, temp, AVR_H | |
2854 | #endif | |
2855 | .endm | |
2856 | ||
2857 | .macro do_z80_flags_set_N | |
2858 | #if EM_Z80 | |
2859 | ori z_flags, (1<<ZFL_N) ; Negation auf 1 | |
2860 | #endif | |
2861 | .endm | |
2862 | ||
2863 | .macro do_z80_flags_set_HN | |
2864 | #if EM_Z80 | |
2865 | ori z_flags,(1<<ZFL_N)|(1<<ZFL_H) | |
2866 | #endif | |
2867 | .endm | |
2868 | ||
2869 | .macro do_z80_flags_clear_N | |
2870 | #if EM_Z80 | |
2871 | andi z_flags,~(1<<ZFL_N) | |
2872 | #endif | |
2873 | .endm | |
2874 | ||
2875 | .macro do_z80_flags_op_rotate | |
2876 | ; must not change avr carry flag! | |
2877 | #if EM_Z80 | |
2878 | andi z_flags, ~( (1<<ZFL_H) | (1<<ZFL_N) | (1<<ZFL_C) ) | |
2879 | #else | |
2880 | andi z_flags, ~( (1<<ZFL_C) ) | |
2881 | #endif | |
2882 | .endm | |
2883 | ||
2884 | .macro do_z80_flags_op_and | |
2885 | #if EM_Z80 | |
2886 | ori z_flags,(1<<ZFL_H) | |
2887 | #else | |
2888 | ori z_flags,(1<<ZFL_H) | |
2889 | #endif | |
2890 | .endm | |
2891 | ||
2892 | .macro do_z80_flags_op_or | |
2893 | #if EM_Z80 | |
2894 | #endif | |
2895 | .endm | |
2896 | ||
2897 | ||
fdcfcd44 L |
2898 | do_op_nop: |
2899 | ret | |
2900 | ||
3c3744f1 L |
2901 | ;---------------------------------------------------------------- |
2902 | ;|Mnemonic |SZHPNC|Description |Notes | | |
2903 | ;---------------------------------------------------------------- | |
2904 | ;|INC r |***V0-|Increment |r=r+1 | | |
2905 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
2906 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
37617bd8 L |
2907 | ;|----------|SZHP C|---------- 8080 ----------------------------| |
2908 | ;|INC r |**-P0-|Increment |r=r+1 | | |
2909 | ;|INC [HL] |**-P0-|Increment |[HL]=[HL]+1 | | |
3c3744f1 | 2910 | ; |
37617bd8 | 2911 | ; |
fdcfcd44 | 2912 | do_op_inc: |
37617bd8 L |
2913 | ldi temp,1 |
2914 | add opl,temp | |
2915 | in temp, sreg | |
2916 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
2917 | ldpmx temp2, sz53p_tab, opl | |
2918 | or z_flags,temp2 ; | |
2919 | do_z80_flags_HP | |
64f220e6 L |
2920 | ret |
2921 | ||
3c3744f1 L |
2922 | ;---------------------------------------------------------------- |
2923 | ;|Mnemonic |SZHPNC|Description |Notes | | |
2924 | ;---------------------------------------------------------------- | |
37617bd8 L |
2925 | ;|DEC r |***V1-|Decrement |s=s-1 | |
2926 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
2927 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
2928 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
2929 | ;|DEC r |**-P -|Increment |r=r+1 | | |
2930 | ;|DEC [HL] |**-P -|Increment |[HL]=[HL]+1 | | |
2931 | ; | |
3c3744f1 | 2932 | ; |
fdcfcd44 | 2933 | do_op_dec: |
37617bd8 | 2934 | subi opl,1 |
64f220e6 | 2935 | in temp, sreg |
37617bd8 L |
2936 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag |
2937 | ldpmx temp2, sz53p_tab, opl | |
2938 | or z_flags,temp2 ; | |
2939 | do_z80_flags_HP | |
2940 | do_z80_flags_set_N | |
3c3744f1 L |
2941 | ret |
2942 | ||
2943 | ||
2944 | ;---------------------------------------------------------------- | |
2945 | ;|Mnemonic |SZHPNC|Description |Notes | | |
2946 | ;---------------------------------------------------------------- | |
2947 | ;|INC xx |------|Increment |xx=xx+1 | | |
2948 | ;|INC ss |------|Increment |ss=ss+1 | | |
2949 | ; | |
37617bd8 | 2950 | ; |
fdcfcd44 | 2951 | do_op_inc16: |
db568140 L |
2952 | subi opl,low(-1) |
2953 | sbci oph,high(-1) | |
64f220e6 L |
2954 | ret |
2955 | ||
3c3744f1 L |
2956 | ;---------------------------------------------------------------- |
2957 | ;|Mnemonic |SZHPNC|Description |Notes | | |
2958 | ;---------------------------------------------------------------- | |
2959 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
2960 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
2961 | ; | |
37617bd8 | 2962 | ; |
fdcfcd44 | 2963 | do_op_dec16: |
37617bd8 L |
2964 | subi opl, 1 |
2965 | sbci oph, 0 | |
64f220e6 L |
2966 | ret |
2967 | ||
3c3744f1 L |
2968 | ;---------------------------------------------------------------- |
2969 | ;|Mnemonic |SZHPNC|Description |Notes | | |
2970 | ;---------------------------------------------------------------- | |
2971 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
37617bd8 L |
2972 | ;|----------|SZHP C|---------- 8080 ----------------------------| |
2973 | ;|RLCA |---- *|Rotate Left Circular |A=A<- | | |
2974 | ; | |
3c3744f1 | 2975 | ; |
fdcfcd44 L |
2976 | do_op_rlc: |
2977 | ;Rotate Left Cyclical. All bits move 1 to the | |
2978 | ;left, the msb becomes c and lsb. | |
37617bd8 | 2979 | do_z80_flags_op_rotate |
64f220e6 L |
2980 | lsl opl |
2981 | brcc do_op_rlc_noc | |
2982 | ori opl, 1 | |
2983 | ori z_flags, (1<<ZFL_C) | |
fdcfcd44 L |
2984 | do_op_rlc_noc: |
2985 | ret | |
2986 | ||
3c3744f1 L |
2987 | ;---------------------------------------------------------------- |
2988 | ;|Mnemonic |SZHPNC|Description |Notes | | |
2989 | ;---------------------------------------------------------------- | |
2990 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
37617bd8 L |
2991 | ;|----------|SZHP C|---------- 8080 ----------------------------| |
2992 | ;|RRCA |---- *|Rotate Right Circular|A=->A | | |
2993 | ; | |
3c3744f1 | 2994 | ; |
fdcfcd44 L |
2995 | do_op_rrc: |
2996 | ;Rotate Right Cyclical. All bits move 1 to the | |
2997 | ;right, the lsb becomes c and msb. | |
37617bd8 | 2998 | do_z80_flags_op_rotate |
64f220e6 L |
2999 | lsr opl |
3000 | brcc do_op_rrc_noc | |
3001 | ori opl, 0x80 | |
3002 | ori z_flags, (1<<ZFL_C) | |
fdcfcd44 L |
3003 | do_op_rrc_noc: |
3004 | ret | |
3005 | ||
3c3744f1 L |
3006 | ;---------------------------------------------------------------- |
3007 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3008 | ;---------------------------------------------------------------- | |
3009 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
37617bd8 L |
3010 | ;|----------|SZHP C|---------- 8080 ----------------------------| |
3011 | ;|RRA |---- *|Rotate Right Acc. |A=->{CY,A} | | |
3c3744f1 | 3012 | ; |
37617bd8 | 3013 | ; |
fdcfcd44 L |
3014 | do_op_rr: |
3015 | ;Rotate Right. All bits move 1 to the right, the lsb | |
3016 | ;becomes c, c becomes msb. | |
37617bd8 | 3017 | clc ; get z80 carry to avr carry |
64f220e6 L |
3018 | sbrc z_flags,ZFL_C |
3019 | sec | |
37617bd8 L |
3020 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) |
3021 | bmov z_flags,ZFL_C, opl,0 ; Bit 0 --> CY | |
64f220e6 | 3022 | ror opl |
64f220e6 L |
3023 | ret |
3024 | ||
3c3744f1 L |
3025 | ;---------------------------------------------------------------- |
3026 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3027 | ;---------------------------------------------------------------- | |
37617bd8 L |
3028 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | |
3029 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3030 | ;|RLA |---- *|Rotate Left Acc. |A={CY,A}<- | | |
3c3744f1 | 3031 | ; |
37617bd8 | 3032 | ; |
fdcfcd44 L |
3033 | do_op_rl: |
3034 | ;Rotate Left. All bits move 1 to the left, the msb | |
3035 | ;becomes c, c becomes lsb. | |
3036 | clc | |
3037 | sbrc z_flags,ZFL_C | |
3038 | sec | |
37617bd8 L |
3039 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) |
3040 | bmov z_flags,ZFL_C, opl,7 ; Bit 7 --> CY | |
fdcfcd44 | 3041 | rol opl |
fdcfcd44 L |
3042 | ret |
3043 | ||
3c3744f1 L |
3044 | ;---------------------------------------------------------------- |
3045 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3046 | ;---------------------------------------------------------------- | |
37617bd8 L |
3047 | ;|ADD A,s |***V0*|Add |A=A+s | |
3048 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3049 | ;|ADD A,s |***P *|Add |A=A+s | | |
3050 | ; | |
3c3744f1 | 3051 | ; |
fdcfcd44 | 3052 | do_op_adda: |
fdcfcd44 L |
3053 | add opl,z_a |
3054 | in temp,sreg | |
37617bd8 L |
3055 | ldpmx z_flags,sz53p_tab,opl ;S,Z,P flag |
3056 | bmov z_flags,ZFL_C, temp,AVR_C | |
3057 | do_z80_flags_HP | |
fdcfcd44 L |
3058 | ret |
3059 | ||
3c3744f1 L |
3060 | ;---------------------------------------------------------------- |
3061 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3062 | ;---------------------------------------------------------------- | |
37617bd8 L |
3063 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | |
3064 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3065 | ;|ADC A,s |***P *|Add with Carry |A=A+s+CY | | |
3066 | ; | |
3c3744f1 | 3067 | ; |
fdcfcd44 L |
3068 | do_op_adca: |
3069 | clc | |
3070 | sbrc z_flags,ZFL_C | |
3071 | sec | |
3072 | adc opl,z_a | |
3073 | in temp,sreg | |
37617bd8 L |
3074 | ldpmx z_flags,sz53p_tab,opl ;S,Z,P |
3075 | bmov z_flags,ZFL_C, temp,AVR_C | |
3076 | do_z80_flags_HP | |
fdcfcd44 L |
3077 | ret |
3078 | ||
3c3744f1 L |
3079 | ;---------------------------------------------------------------- |
3080 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3081 | ;---------------------------------------------------------------- | |
37617bd8 L |
3082 | ;|SUB s |***V1*|Subtract |A=A-s | |
3083 | ;|CP s |***V1*|Compare |A-s | | |
3084 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3085 | ;|SUB s |***P *|Subtract |A=A-s | | |
3086 | ;|CP s |***P *|Compare |A-s | | |
3087 | ||
3c3744f1 | 3088 | ; |
fdcfcd44 L |
3089 | do_op_subfa: |
3090 | mov temp,z_a | |
3091 | sub temp,opl | |
3092 | mov opl,temp | |
3093 | in temp,sreg | |
37617bd8 L |
3094 | ldpmx z_flags,sz53p_tab,opl ;S,Z,P |
3095 | bmov z_flags,ZFL_C, temp,AVR_C | |
3096 | do_z80_flags_HP | |
3097 | do_z80_flags_set_N | |
fdcfcd44 L |
3098 | ret |
3099 | ||
3c3744f1 L |
3100 | ;---------------------------------------------------------------- |
3101 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3102 | ;---------------------------------------------------------------- | |
37617bd8 L |
3103 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | |
3104 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3105 | ;|SBC A,s |***P *|Subtract with Carry |A=A-s-CY | | |
3106 | ; | |
3c3744f1 | 3107 | ; |
fdcfcd44 L |
3108 | do_op_sbcfa: |
3109 | mov temp,z_a | |
3110 | clc | |
3111 | sbrc z_flags,ZFL_C | |
3112 | sec | |
3113 | sbc temp,opl | |
3114 | mov opl,temp | |
3115 | in temp,sreg | |
37617bd8 L |
3116 | ldpmx z_flags,sz53p_tab,opl ;S,Z,P |
3117 | bmov z_flags,ZFL_C, temp,AVR_C | |
3118 | do_z80_flags_HP | |
3119 | do_z80_flags_set_N | |
fdcfcd44 L |
3120 | ret |
3121 | ||
3c3744f1 L |
3122 | ;---------------------------------------------------------------- |
3123 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3124 | ;---------------------------------------------------------------- | |
37617bd8 L |
3125 | ;|AND s |**1P00|Logical AND |A=A&s | |
3126 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3127 | ;|AND s |**-P 0|Logical AND |A=A&s | | |
3c3744f1 | 3128 | ; |
37617bd8 | 3129 | ; TODO H-Flag |
fdcfcd44 | 3130 | do_op_anda: |
37617bd8 L |
3131 | and opl,z_a ; |
3132 | ldpmx z_flags,sz53p_tab,opl ;S,Z,P,N,C | |
3133 | do_z80_flags_op_and | |
fdcfcd44 L |
3134 | ret |
3135 | ||
37617bd8 | 3136 | |
3c3744f1 L |
3137 | ;---------------------------------------------------------------- |
3138 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3139 | ;---------------------------------------------------------------- | |
37617bd8 L |
3140 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | |
3141 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3142 | ;|OR s |**-P00|Logical inclusive OR |A=Avs | | |
3c3744f1 | 3143 | ; |
37617bd8 | 3144 | ; TODO: H-Flag |
fdcfcd44 | 3145 | do_op_ora: |
fdcfcd44 | 3146 | or opl,z_a |
37617bd8 L |
3147 | ldpmx z_flags,sz53p_tab,opl ;S,Z,H,P,N,C |
3148 | do_z80_flags_op_or | |
fdcfcd44 L |
3149 | ret |
3150 | ||
3c3744f1 L |
3151 | ;---------------------------------------------------------------- |
3152 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3153 | ;---------------------------------------------------------------- | |
37617bd8 L |
3154 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | |
3155 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3156 | ;|XOR s |**-P 0|Logical Exclusive OR |A=Axs | | |
3c3744f1 | 3157 | ; |
37617bd8 | 3158 | ; TODO: H-Flag |
fdcfcd44 | 3159 | do_op_xora: |
fdcfcd44 | 3160 | eor opl,z_a |
37617bd8 L |
3161 | ldpmx z_flags,sz53p_tab,opl ;S,Z,H,P,N,C |
3162 | do_z80_flags_op_or | |
fdcfcd44 L |
3163 | ret |
3164 | ||
3c3744f1 L |
3165 | ;---------------------------------------------------------------- |
3166 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3167 | ;---------------------------------------------------------------- | |
37617bd8 L |
3168 | ;|ADD HL,ss |--?-0*|Add |HL=HL+ss | |
3169 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3170 | ;|ADD HL,ss |---- *|Add |HL=HL+ss | | |
3171 | ; | |
3c3744f1 | 3172 | ; |
fdcfcd44 L |
3173 | do_op_addhl: |
3174 | add opl,z_l | |
3175 | adc oph,z_h | |
3176 | in temp,sreg | |
37617bd8 L |
3177 | bmov z_flags,ZFL_H, temp,AVR_H |
3178 | bmov z_flags,ZFL_C, temp,AVR_C | |
3179 | do_z80_flags_clear_N | |
fdcfcd44 L |
3180 | ret |
3181 | ||
3c3744f1 L |
3182 | ;---------------------------------------------------------------- |
3183 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3184 | ;---------------------------------------------------------------- | |
37617bd8 | 3185 | ;|LD dst,src|------|Load |dst=src | |
3c3744f1 | 3186 | ; |
37617bd8 L |
3187 | ; |
3188 | do_op_sthl: ;store hl to mem loc in opl:h | |
99ed7199 L |
3189 | movw adrl,opl |
3190 | #if DRAM_WORD_ACCESS | |
db568140 | 3191 | movw temp,z_l |
99ed7199 L |
3192 | rcall memWriteWord |
3193 | #else | |
fdcfcd44 L |
3194 | mov temp,z_l |
3195 | rcall memWriteByte | |
99ed7199 | 3196 | adiw adrl,1 |
fdcfcd44 L |
3197 | mov temp,z_h |
3198 | rcall memWriteByte | |
99ed7199 | 3199 | #endif |
fdcfcd44 L |
3200 | ret |
3201 | ||
3c3744f1 L |
3202 | ;---------------------------------------------------------------- |
3203 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3204 | ;---------------------------------------------------------------- | |
37617bd8 | 3205 | ;|LD dst,src|------|Load |dst=src | |
3c3744f1 | 3206 | ; |
37617bd8 | 3207 | ; |
fdcfcd44 | 3208 | do_op_rmem16: |
99ed7199 L |
3209 | movw adrl,opl |
3210 | #if DRAM_WORD_ACCESS | |
3211 | rcall memReadWord | |
3212 | movw opl,temp | |
3213 | #else | |
fdcfcd44 L |
3214 | rcall memReadByte |
3215 | mov opl,temp | |
99ed7199 | 3216 | adiw adrl,1 |
fdcfcd44 L |
3217 | rcall memReadByte |
3218 | mov oph,temp | |
99ed7199 | 3219 | #endif |
fdcfcd44 L |
3220 | ret |
3221 | ||
3c3744f1 L |
3222 | ;---------------------------------------------------------------- |
3223 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3224 | ;---------------------------------------------------------------- | |
37617bd8 L |
3225 | ;|LD dst,src|------|Load |dst=src | |
3226 | ; | |
3c3744f1 | 3227 | ; |
fdcfcd44 | 3228 | do_op_rmem8: |
99ed7199 | 3229 | movw adrl,opl |
fdcfcd44 L |
3230 | rcall memReadByte |
3231 | mov opl,temp | |
3232 | ret | |
3233 | ||
3c3744f1 L |
3234 | ;---------------------------------------------------------------- |
3235 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3236 | ;---------------------------------------------------------------- | |
37617bd8 L |
3237 | ;|DAA |***P-*|Decimal Adjust Acc. | | |
3238 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3c3744f1 L |
3239 | ; |
3240 | ; Not yet checked | |
37617bd8 L |
3241 | |
3242 | ; Description (http://www.z80.info/z80syntx.htm#DAA): | |
3243 | ; This instruction conditionally adjusts the accumulator for BCD addition | |
3244 | ; and subtraction operations. For addition (ADD, ADC, INC) or subtraction | |
3245 | ; (SUB, SBC, DEC, NEC), the following table indicates the operation performed: | |
3246 | ; | |
3247 | ; ------------------------------------------------------------------------------- | |
3248 | ; | | C Flag | HEX value in | H Flag | HEX value in | Number | C flag| | |
3249 | ; | Operation| Before | upper digit | Before | lower digit | added | After | | |
3250 | ; | | DAA | (bit 7-4) | DAA | (bit 3-0) | to byte | DAA | | |
3251 | ; |-----------------------------------------------------------------------------| | |
3252 | ; | | 0 | 0-9 | 0 | 0-9 | 00 | 0 | | |
3253 | ; | ADD | 0 | 0-8 | 0 | A-F | 06 | 0 | | |
3254 | ; | | 0 | 0-9 | 1 | 0-3 | 06 | 0 | | |
3255 | ; | ADC | 0 | A-F | 0 | 0-9 | 60 | 1 | | |
3256 | ; | | 0 | 9-F | 0 | A-F | 66 | 1 | | |
3257 | ; | INC | 0 | A-F | 1 | 0-3 | 66 | 1 | | |
3258 | ; | | 1 | 0-2 | 0 | 0-9 | 60 | 1 | | |
3259 | ; | | 1 | 0-2 | 0 | A-F | 66 | 1 | | |
3260 | ; | | 1 | 0-3 | 1 | 0-3 | 66 | 1 | | |
3261 | ; |-----------------------------------------------------------------------------| | |
3262 | ; | SUB | 0 | 0-9 | 0 | 0-9 | 00 | 0 | | |
3263 | ; | SBC | 0 | 0-8 | 1 | 6-F | FA | 0 | | |
3264 | ; | DEC | 1 | 7-F | 0 | 0-9 | A0 | 1 | | |
3265 | ; | NEG | 1 | 6-F | 1 | 6-F | 9A | 1 | | |
3266 | ; |-----------------------------------------------------------------------------| | |
3267 | ; | |
3268 | ; Flags: | |
3269 | ; C: See instruction. | |
3270 | ; N: Unaffected. | |
3271 | ; P/V: Set if Acc. is even parity after operation, reset otherwise. | |
3272 | ; H: See instruction. | |
3273 | ; Z: Set if Acc. is Zero after operation, reset otherwise. | |
3274 | ; S: Set if most significant bit of Acc. is 1 after operation, reset otherwise. | |
3275 | ||
3276 | ||
3277 | ||
3278 | #if 1 | |
fdcfcd44 | 3279 | do_op_da: |
37617bd8 L |
3280 | ldi oph,0 ; what to add |
3281 | sbrc z_flags,ZFL_H ; if H-Flag | |
3282 | rjmp op_da_06 | |
3283 | mov temp,opl | |
3284 | andi temp,0x0f ; ... or lower digit > 9 | |
3285 | cpi temp,0x0a | |
3286 | brlo op_da_06n | |
3287 | op_da_06: | |
3288 | ori oph,0x06 | |
3289 | op_da_06n: | |
3290 | sbrc z_flags,(1<<ZFL_C) | |
3291 | rjmp op_da_60 | |
3292 | cpi opl,0xa0 | |
3293 | brlo op_da_60n | |
3294 | op_da_60: | |
3295 | ori oph,0x60 | |
3296 | op_da_60n: | |
3297 | cpi opl,0x9a | |
3298 | brlo op_da_99n | |
3299 | ori z_flags,(1<<ZFL_C); set C | |
3300 | op_da_99n: | |
3301 | sbrs z_flags,ZFL_N ; if sub-op | |
3302 | rjmp op_da_add ; then | |
3303 | sub opl,oph | |
3304 | rjmp op_da_ex | |
3305 | op_da_add: ; else add-op | |
3306 | cpi opl,0x91 | |
3307 | brlo op_da_60n2 | |
3308 | mov temp,opl | |
3309 | andi temp,0x0f | |
3310 | cpi temp,0x0a | |
3311 | brlo op_da_60n2 | |
3312 | ori oph,0x60 | |
3313 | op_da_60n2: | |
3314 | add opl,oph | |
3315 | op_da_ex: | |
3316 | in temp,SREG | |
3317 | sbrc temp,AVR_H | |
3318 | ori z_flags,(1<<ZFL_C) | |
3319 | andi z_flags,(1<<ZFL_N)|(1<<ZFL_C) ; preserve C,N | |
3320 | ldpmx temp2, sz53p_tab, opl ; get S,Z,P | |
3321 | or z_flags,temp2 | |
3322 | bmov z_flags,ZFL_H, temp,AVR_H ; H (?) | |
fdcfcd44 | 3323 | ret |
37617bd8 | 3324 | #else |
fdcfcd44 | 3325 | |
37617bd8 L |
3326 | do_op_da: |
3327 | sbrc z_flags,ZFL_N ; if add-op | |
3328 | rjmp do_op_da_sub ; then | |
3329 | ldi temp2,0 ; | |
3330 | mov temp,opl ; | |
3331 | andi temp,0x0f ; | |
3332 | cpi temp,0x0a ; if lower digit > 9 | |
3333 | brlo do_op_da_h ; | |
3334 | ori temp2,0x06 ; add 6 to lower digit | |
3335 | do_op_da_h: ; | |
3336 | sbrc z_flags,ZFL_H ; ... or H-Flag | |
3337 | ori temp2,0x06 ; | |
3338 | add opl,temp2 ; | |
3339 | ||
3340 | ldi temp2,0 ; | |
3341 | mov temp,opl ; | |
3342 | andi temp,0xf0 ; | |
3343 | cpi temp,0xa0 ; | |
3344 | brlo do_op_da_c ; | |
3345 | ori temp2,0x60 ; | |
3346 | do_op_da_c: ; else sub-op | |
3347 | sbrc z_flags,ZFL_C ; | |
3348 | ori temp2,0x60 ; | |
3349 | andi z_flags, ~( (1<<ZFL_S) | (1<<ZFL_Z) | (1<<ZFL_H) ) | |
3350 | add opl,temp2 ; | |
3351 | in temp,SREG ; | |
3352 | bst temp,AVR_Z ;Z-Flag | |
3353 | bld z_flags,ZFL_Z ; | |
3354 | bst temp,AVR_N ;S-Flag | |
3355 | bst z_flags,ZFL_S ; | |
3356 | sbrc temp2,5 ;C-Flag, set if 0x06 added | |
3357 | ori z_flags,(1<<ZFL_C) ; | |
3358 | ;H-Flag? | |
3359 | ret | |
3360 | ||
3361 | do_op_da_sub: ;TODO: | |
3362 | rcall do_op_inv | |
3363 | ret | |
3364 | #endif | |
fdcfcd44 | 3365 | |
3c3744f1 L |
3366 | ;---------------------------------------------------------------- |
3367 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3368 | ;---------------------------------------------------------------- | |
37617bd8 L |
3369 | ;|SCF |--0-01|Set Carry Flag |CY=1 | |
3370 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3371 | ; | |
3c3744f1 | 3372 | ; |
fdcfcd44 | 3373 | do_op_scf: |
37617bd8 L |
3374 | andi z_flags,~((1<<ZFL_H)|(1<<ZFL_N)) |
3375 | ori z_flags,(1<<ZFL_C) | |
fdcfcd44 L |
3376 | ret |
3377 | ||
3c3744f1 L |
3378 | ;---------------------------------------------------------------- |
3379 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3380 | ;---------------------------------------------------------------- | |
37617bd8 L |
3381 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY | |
3382 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3383 | ;|SCF |---- 1|Set Carry Flag |CY=1 | | |
3c3744f1 | 3384 | ; |
37617bd8 | 3385 | ;TODO: H-Flag |
fdcfcd44 | 3386 | do_op_ccf: |
37617bd8 | 3387 | do_z80_flags_clear_N |
fdcfcd44 L |
3388 | ldi temp,(1<<ZFL_C) |
3389 | eor z_flags,temp | |
3390 | ret | |
3391 | ||
3c3744f1 L |
3392 | ;---------------------------------------------------------------- |
3393 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3394 | ;---------------------------------------------------------------- | |
37617bd8 L |
3395 | ;|CPL |--1-1-|Complement |A=~A | |
3396 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3397 | ;|CPL |---- -|Complement |A=~A | | |
3398 | ; | |
3c3744f1 | 3399 | ; |
fdcfcd44 L |
3400 | do_op_cpl: |
3401 | com opl | |
37617bd8 | 3402 | do_z80_flags_set_HN |
fdcfcd44 L |
3403 | ret |
3404 | ||
37617bd8 | 3405 | |
3c3744f1 L |
3406 | ;---------------------------------------------------------------- |
3407 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3408 | ;---------------------------------------------------------------- | |
37617bd8 L |
3409 | ;|PUSH xx |------|Push |-[SP]=xx | |
3410 | ;|PUSH qq |------|Push |-[SP]=qq | | |
3411 | ; | |
3c3744f1 | 3412 | ; |
fdcfcd44 | 3413 | do_op_push16: |
99ed7199 L |
3414 | movw adrl,z_spl |
3415 | subi adrl,2 | |
3416 | sbci adrh,0 | |
3417 | movw z_spl,adrl | |
3418 | #if DRAM_WORD_ACCESS | |
3419 | movw temp,opl | |
3420 | rcall memWriteWord | |
3421 | #else | |
fdcfcd44 L |
3422 | mov temp,opl |
3423 | rcall memWriteByte | |
99ed7199 | 3424 | adiw adrl,1 |
37617bd8 L |
3425 | mov temp,oph |
3426 | rcall memWriteByte | |
37617bd8 | 3427 | #endif |
fdcfcd44 L |
3428 | |
3429 | .if STACK_DBG | |
3430 | rcall printstr | |
3431 | .db "Stack push ",0 | |
3432 | mov temp,oph | |
3433 | rcall printhex | |
3434 | mov temp,opl | |
3435 | rcall printhex | |
3436 | rcall printstr | |
3437 | .db ", SP is now ",0 | |
3438 | mov temp,z_sph | |
3439 | rcall printhex | |
3440 | mov temp,z_spl | |
3441 | rcall printhex | |
3442 | rcall printstr | |
3443 | .db ".",13,0 | |
3444 | .endif | |
3445 | ||
3446 | ret | |
3447 | ||
3c3744f1 L |
3448 | ;---------------------------------------------------------------- |
3449 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3450 | ;---------------------------------------------------------------- | |
37617bd8 L |
3451 | ;|POP xx |------|Pop |xx=[SP]+ | |
3452 | ;|POP qq |------|Pop |qq=[SP]+ | | |
3453 | ; | |
3c3744f1 | 3454 | ; |
fdcfcd44 | 3455 | do_op_pop16: |
99ed7199 L |
3456 | movw adrl,z_spl |
3457 | #if DRAM_WORD_ACCESS | |
3458 | rcall memReadWord | |
3459 | movw opl,temp | |
3460 | #else | |
fdcfcd44 L |
3461 | rcall memReadByte |
3462 | mov opl,temp | |
99ed7199 | 3463 | adiw adrl,1 |
fdcfcd44 L |
3464 | rcall memReadByte |
3465 | mov oph,temp | |
99ed7199 | 3466 | #endif |
fdcfcd44 | 3467 | |
99ed7199 | 3468 | ldi temp,2 |
fdcfcd44 | 3469 | add z_spl,temp |
99ed7199 | 3470 | adc z_sph,_0 |
fdcfcd44 | 3471 | |
db568140 | 3472 | |
fdcfcd44 L |
3473 | .if STACK_DBG |
3474 | rcall printstr | |
3475 | .db "Stack pop: val ",0 | |
3476 | mov temp,oph | |
3477 | rcall printhex | |
3478 | mov temp,opl | |
3479 | rcall printhex | |
3480 | rcall printstr | |
3481 | .db ", SP is now",0 | |
3482 | mov temp,z_sph | |
3483 | rcall printhex | |
3484 | mov temp,z_spl | |
3485 | rcall printhex | |
3486 | rcall printstr | |
3487 | .db ".",13,0 | |
3488 | .endif | |
3489 | ret | |
3490 | ||
3c3744f1 L |
3491 | ;---------------------------------------------------------------- |
3492 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3493 | ;---------------------------------------------------------------- | |
37617bd8 L |
3494 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | |
3495 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
3c3744f1 | 3496 | ; |
37617bd8 | 3497 | ; |
fdcfcd44 L |
3498 | do_op_exhl: |
3499 | mov temp,z_h | |
3500 | mov z_h,oph | |
3501 | mov oph,temp | |
3502 | mov temp,z_l | |
3503 | mov z_l,opl | |
3504 | mov opl,temp | |
3505 | ret | |
3506 | ||
3c3744f1 L |
3507 | ;---------------------------------------------------------------- |
3508 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3509 | ;---------------------------------------------------------------- | |
3510 | ; | |
37617bd8 | 3511 | ; TODO: Implement IFF1, IFF2 |
fdcfcd44 L |
3512 | do_op_di: |
3513 | ret | |
3514 | ||
3c3744f1 L |
3515 | ;---------------------------------------------------------------- |
3516 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3517 | ;---------------------------------------------------------------- | |
3518 | ; | |
37617bd8 | 3519 | ; TODO: Implement IFF1, IFF2 |
fdcfcd44 L |
3520 | do_op_ei: |
3521 | ret | |
3522 | ||
3c3744f1 L |
3523 | ;---------------------------------------------------------------- |
3524 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3525 | ;---------------------------------------------------------------- | |
37617bd8 L |
3526 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | |
3527 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3528 | ;|RET cc |------|Conditional Return |If cc RET | | |
3529 | ; | |
3c3744f1 | 3530 | ; |
fdcfcd44 | 3531 | do_op_ifnz: |
64f220e6 L |
3532 | sbrs z_flags, ZFL_Z |
3533 | ret | |
db568140 L |
3534 | clr insdech |
3535 | clr insdecl | |
fdcfcd44 L |
3536 | ret |
3537 | ||
3c3744f1 L |
3538 | ;---------------------------------------------------------------- |
3539 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3540 | ;---------------------------------------------------------------- | |
37617bd8 L |
3541 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | |
3542 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3543 | ;|RET cc |------|Conditional Return |If cc RET | | |
3544 | ; | |
3c3744f1 | 3545 | ; |
fdcfcd44 | 3546 | do_op_ifz: |
64f220e6 L |
3547 | sbrc z_flags, ZFL_Z |
3548 | ret | |
db568140 L |
3549 | clr insdech |
3550 | clr insdecl | |
fdcfcd44 L |
3551 | ret |
3552 | ||
3c3744f1 L |
3553 | ;---------------------------------------------------------------- |
3554 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3555 | ;---------------------------------------------------------------- | |
37617bd8 L |
3556 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | |
3557 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3558 | ;|RET cc |------|Conditional Return |If cc RET | | |
3559 | ; | |
3c3744f1 | 3560 | ; |
fdcfcd44 | 3561 | do_op_ifnc: |
64f220e6 | 3562 | sbrs z_flags, ZFL_C |
37617bd8 | 3563 | ret |
db568140 L |
3564 | clr insdech |
3565 | clr insdecl | |
fdcfcd44 L |
3566 | ret |
3567 | ||
3c3744f1 L |
3568 | ;---------------------------------------------------------------- |
3569 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3570 | ;---------------------------------------------------------------- | |
37617bd8 L |
3571 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | |
3572 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3573 | ;|RET cc |------|Conditional Return |If cc RET | | |
3574 | ; | |
3c3744f1 | 3575 | ; |
fdcfcd44 | 3576 | do_op_ifc: |
64f220e6 L |
3577 | sbrc z_flags, ZFL_C |
3578 | ret | |
db568140 L |
3579 | clr insdech |
3580 | clr insdecl | |
fdcfcd44 L |
3581 | ret |
3582 | ||
3c3744f1 L |
3583 | ;---------------------------------------------------------------- |
3584 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3585 | ;---------------------------------------------------------------- | |
37617bd8 L |
3586 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | |
3587 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3588 | ;|RET cc |------|Conditional Return |If cc RET | | |
3589 | ; | |
3c3744f1 | 3590 | ; |
fdcfcd44 | 3591 | do_op_ifpo: |
37617bd8 | 3592 | sbrs z_flags, ZFL_P |
64f220e6 | 3593 | ret |
db568140 L |
3594 | clr insdech |
3595 | clr insdecl | |
fdcfcd44 L |
3596 | ret |
3597 | ||
3c3744f1 L |
3598 | ;---------------------------------------------------------------- |
3599 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3600 | ;---------------------------------------------------------------- | |
37617bd8 L |
3601 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | |
3602 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3603 | ;|RET cc |------|Conditional Return |If cc RET | | |
3604 | ; | |
3c3744f1 | 3605 | ; |
fdcfcd44 | 3606 | do_op_ifpe: |
37617bd8 | 3607 | sbrc z_flags, ZFL_P |
64f220e6 | 3608 | ret |
db568140 L |
3609 | clr insdech |
3610 | clr insdecl | |
fdcfcd44 L |
3611 | ret |
3612 | ||
3c3744f1 L |
3613 | ;---------------------------------------------------------------- |
3614 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3615 | ;---------------------------------------------------------------- | |
37617bd8 L |
3616 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | |
3617 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3618 | ;|RET cc |------|Conditional Return |If cc RET | | |
3619 | ; | |
3c3744f1 | 3620 | ; |
fdcfcd44 | 3621 | do_op_ifp: ;sign positive, aka s=0 |
64f220e6 | 3622 | sbrs z_flags, ZFL_S |
fdcfcd44 | 3623 | ret |
db568140 L |
3624 | clr insdech |
3625 | clr insdecl | |
fdcfcd44 L |
3626 | ret |
3627 | ||
3c3744f1 L |
3628 | ;---------------------------------------------------------------- |
3629 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3630 | ;---------------------------------------------------------------- | |
37617bd8 L |
3631 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | |
3632 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3633 | ;|RET cc |------|Conditional Return |If cc RET | | |
3634 | ; | |
3c3744f1 | 3635 | ; |
fdcfcd44 | 3636 | do_op_ifm: ;sign negative, aka s=1 |
64f220e6 | 3637 | sbrc z_flags, ZFL_S |
fdcfcd44 | 3638 | ret |
db568140 L |
3639 | clr insdech |
3640 | clr insdecl | |
fdcfcd44 L |
3641 | ret |
3642 | ||
3c3744f1 L |
3643 | ;---------------------------------------------------------------- |
3644 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3645 | ;---------------------------------------------------------------- | |
37617bd8 L |
3646 | ;|OUT [n],A |------|Output |[n]=A | |
3647 | ; | |
3c3744f1 | 3648 | ; |
fdcfcd44 L |
3649 | ;Interface with peripherials goes here :) |
3650 | do_op_outa: ; out (opl),a | |
3651 | .if PORT_DEBUG | |
3652 | rcall printstr | |
3653 | .db 13,"Port write: ",0 | |
3654 | mov temp,z_a | |
3655 | rcall printhex | |
3656 | rcall printstr | |
3657 | .db " -> (",0 | |
3658 | mov temp,opl | |
3659 | rcall printhex | |
3660 | rcall printstr | |
3661 | .db ")",13,0 | |
3662 | .endif | |
3663 | mov temp,z_a | |
3664 | mov temp2,opl | |
3665 | rcall portWrite | |
3666 | ret | |
3667 | ||
3c3744f1 L |
3668 | ;---------------------------------------------------------------- |
3669 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3670 | ;---------------------------------------------------------------- | |
37617bd8 L |
3671 | ;|IN A,[n] |------|Input |A=[n] | |
3672 | ; | |
3c3744f1 | 3673 | ; |
fdcfcd44 L |
3674 | do_op_in: ; in a,(opl) |
3675 | .if PORT_DEBUG | |
3676 | rcall printstr | |
3677 | .db 13,"Port read: (",0 | |
3678 | mov temp,opl | |
3679 | rcall printhex | |
3680 | rcall printstr | |
3681 | .db ") -> ",0 | |
3682 | .endif | |
3683 | ||
3684 | mov temp2,opl | |
3685 | rcall portRead | |
3686 | mov opl,temp | |
3687 | ||
3688 | .if PORT_DEBUG | |
3689 | rcall printhex | |
3690 | rcall printstr | |
3691 | .db 13,0 | |
3692 | .endif | |
3693 | ret | |
3694 | ||
fdcfcd44 | 3695 | |
3c3744f1 | 3696 | ;---------------------------------------------------------------- |
fdcfcd44 L |
3697 | do_op_inv: |
3698 | rcall printstr | |
64f220e6 L |
3699 | .db "Invalid opcode @ PC=",0,0 |
3700 | mov temp,z_pch | |
fdcfcd44 | 3701 | rcall printhex |
64f220e6 | 3702 | mov temp,z_pcl |
fdcfcd44 | 3703 | rcall printhex |
3c3744f1 L |
3704 | |
3705 | ;---------------------------------------------------------------- | |
fdcfcd44 L |
3706 | haltinv: |
3707 | rjmp haltinv | |
3708 | ||
37617bd8 L |
3709 | ;---------------------------------------------------------------- |
3710 | ; Lookup table, stolen from z80ex, Z80 emulation library. | |
3711 | ; http://z80ex.sourceforge.net/ | |
3712 | ||
3713 | ; The S, Z, 5 and 3 bits and the parity of the lookup value | |
99ed7199 | 3714 | .org (PC+255) & 0xff00 |
37617bd8 L |
3715 | sz53p_tab: |
3716 | .db 0x44,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
3717 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
3718 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
3719 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
3720 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
3721 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
3722 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
3723 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
3724 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
3725 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
3726 | .db 0x04,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
3727 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
3728 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
3729 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
3730 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
3731 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
3732 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
3733 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
3734 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
3735 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
3736 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
3737 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
3738 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
3739 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
3740 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
3741 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
3742 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
3743 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
3744 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
3745 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
3746 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
3747 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
3748 | ||
fdcfcd44 L |
3749 | |
3750 | ; ----------------------- Opcode decoding ------------------------- | |
3751 | ||
3752 | ; Lookup table for Z80 opcodes. Translates the first byte of the instruction word into three | |
3753 | ; operations: fetch, do something, store. | |
3754 | ; The table is made of 256 words. These 16-bit words consist of | |
3755 | ; the fetch operation (bit 0-4), the processing operation (bit 10-16) and the store | |
3756 | ; operation (bit 5-9). | |
99ed7199 | 3757 | .org (PC+255) & 0xff00 |
fdcfcd44 | 3758 | inst_table: |
99ed7199 L |
3759 | .dw (FETCH_NOP | OP_NOP | STORE_NOP) ; 00 NOP |
3760 | .dw (FETCH_DIR16| OP_NOP | STORE_BC ) ; 01 nn nn LD BC,nn | |
3761 | .dw (FETCH_A | OP_NOP | STORE_MBC) ; 02 LD (BC),A | |
3762 | .dw (FETCH_BC | OP_INC16 | STORE_BC ) ; 03 INC BC | |
3763 | .dw (FETCH_B | OP_INC | STORE_B ) ; 04 INC B | |
3764 | .dw (FETCH_B | OP_DEC | STORE_B ) ; 05 DEC B | |
3765 | .dw (FETCH_DIR8 | OP_NOP | STORE_B ) ; 06 nn LD B,n | |
3766 | .dw (FETCH_A | OP_RLC | STORE_A ) ; 07 RLCA | |
3767 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 08 EX AF,AF' (Z80) | |
3768 | .dw (FETCH_BC | OP_ADDHL | STORE_HL ) ; 09 ADD HL,BC | |
3769 | .dw (FETCH_MBC | OP_NOP | STORE_A ) ; 0A LD A,(BC) | |
3770 | .dw (FETCH_BC | OP_DEC16 | STORE_BC ) ; 0B DEC BC | |
3771 | .dw (FETCH_C | OP_INC | STORE_C ) ; 0C INC C | |
3772 | .dw (FETCH_C | OP_DEC | STORE_C ) ; 0D DEC C | |
3773 | .dw (FETCH_DIR8 | OP_NOP | STORE_C ) ; 0E nn LD C,n | |
3774 | .dw (FETCH_A | OP_RRC | STORE_A ) ; 0F RRCA | |
3775 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 10 oo DJNZ o (Z80) | |
fdcfcd44 | 3776 | .dw (FETCH_DIR16| OP_NOP | STORE_DE ) ; 11 nn nn LD DE,nn |
64f220e6 | 3777 | .dw (FETCH_A | OP_NOP | STORE_MDE) ; 12 LD (DE),A |
99ed7199 | 3778 | .dw (FETCH_DE | OP_INC16 | STORE_DE ) ; 13 INC DE |
fdcfcd44 L |
3779 | .dw (FETCH_D | OP_INC | STORE_D ) ; 14 INC D |
3780 | .dw (FETCH_D | OP_DEC | STORE_D ) ; 15 DEC D | |
3781 | .dw (FETCH_DIR8 | OP_NOP | STORE_D ) ; 16 nn LD D,n | |
64f220e6 | 3782 | .dw (FETCH_A | OP_RL | STORE_A ) ; 17 RLA |
fdcfcd44 L |
3783 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 18 oo JR o (Z80) |
3784 | .dw (FETCH_DE | OP_ADDHL | STORE_HL ) ; 19 ADD HL,DE | |
3785 | .dw (FETCH_MDE | OP_NOP | STORE_A ) ; 1A LD A,(DE) | |
3786 | .dw (FETCH_DE | OP_DEC16 | STORE_DE ) ; 1B DEC DE | |
3787 | .dw (FETCH_E | OP_INC | STORE_E ) ; 1C INC E | |
3788 | .dw (FETCH_E | OP_DEC | STORE_E ) ; 1D DEC E | |
3789 | .dw (FETCH_DIR8 | OP_NOP | STORE_E ) ; 1E nn LD E,n | |
64f220e6 | 3790 | .dw (FETCH_A | OP_RR | STORE_A ) ; 1F RRA |
fdcfcd44 L |
3791 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 20 oo JR NZ,o (Z80) |
3792 | .dw (FETCH_DIR16| OP_NOP | STORE_HL ) ; 21 nn nn LD HL,nn | |
3793 | .dw (FETCH_DIR16| OP_STHL | STORE_NOP) ; 22 nn nn LD (nn),HL | |
3794 | .dw (FETCH_HL | OP_INC16 | STORE_HL ) ; 23 INC HL | |
3795 | .dw (FETCH_H | OP_INC | STORE_H ) ; 24 INC H | |
3796 | .dw (FETCH_H | OP_DEC | STORE_H ) ; 25 DEC H | |
3797 | .dw (FETCH_DIR8 | OP_NOP | STORE_H ) ; 26 nn LD H,n | |
64f220e6 | 3798 | .dw (FETCH_A | OP_DA | STORE_A ) ; 27 DAA |
fdcfcd44 L |
3799 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 28 oo JR Z,o (Z80) |
3800 | .dw (FETCH_HL | OP_ADDHL | STORE_HL ) ; 29 ADD HL,HL | |
3801 | .dw (FETCH_DIR16| OP_RMEM16 | STORE_HL ) ; 2A nn nn LD HL,(nn) | |
3802 | .dw (FETCH_HL | OP_DEC16 | STORE_HL ) ; 2B DEC HL | |
3803 | .dw (FETCH_L | OP_INC | STORE_L ) ; 2C INC L | |
3804 | .dw (FETCH_L | OP_DEC | STORE_L ) ; 2D DEC L | |
3805 | .dw (FETCH_DIR8 | OP_NOP | STORE_L ) ; 2E nn LD L,n | |
64f220e6 | 3806 | .dw (FETCH_A | OP_CPL | STORE_A ) ; 2F CPL |
fdcfcd44 L |
3807 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 30 oo JR NC,o (Z80) |
3808 | .dw (FETCH_DIR16| OP_NOP | STORE_SP ) ; 31 nn nn LD SP,nn | |
3809 | .dw (FETCH_DIR16| OP_NOP | STORE_AM ) ; 32 nn nn LD (nn),A | |
3810 | .dw (FETCH_SP | OP_INC16 | STORE_SP ) ; 33 INC SP | |
3811 | .dw (FETCH_MHL | OP_INC | STORE_MHL) ; 34 INC (HL) | |
3812 | .dw (FETCH_MHL | OP_DEC | STORE_MHL) ; 35 DEC (HL) | |
3813 | .dw (FETCH_DIR8 | OP_NOP | STORE_MHL) ; 36 nn LD (HL),n | |
3814 | .dw (FETCH_NOP | OP_SCF | STORE_NOP) ; 37 SCF | |
3815 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 38 oo JR C,o (Z80) | |
3816 | .dw (FETCH_SP | OP_ADDHL | STORE_HL ) ; 39 ADD HL,SP | |
3817 | .dw (FETCH_DIR16| OP_RMEM8 | STORE_A ) ; 3A nn nn LD A,(nn) | |
3818 | .dw (FETCH_SP | OP_DEC16 | STORE_SP ) ; 3B DEC SP | |
64f220e6 L |
3819 | .dw (FETCH_A | OP_INC | STORE_A ) ; 3C INC A |
3820 | .dw (FETCH_A | OP_DEC | STORE_A ) ; 3D DEC A | |
fdcfcd44 L |
3821 | .dw (FETCH_DIR8 | OP_NOP | STORE_A ) ; 3E nn LD A,n |
3822 | .dw (FETCH_NOP | OP_CCF | STORE_NOP) ; 3F CCF (Complement Carry Flag, gvd) | |
3823 | .dw (FETCH_B | OP_NOP | STORE_B ) ; 40 LD B,r | |
3824 | .dw (FETCH_C | OP_NOP | STORE_B ) ; 41 LD B,r | |
3825 | .dw (FETCH_D | OP_NOP | STORE_B ) ; 42 LD B,r | |
3826 | .dw (FETCH_E | OP_NOP | STORE_B ) ; 43 LD B,r | |
3827 | .dw (FETCH_H | OP_NOP | STORE_B ) ; 44 LD B,r | |
3828 | .dw (FETCH_L | OP_NOP | STORE_B ) ; 45 LD B,r | |
3829 | .dw (FETCH_MHL | OP_NOP | STORE_B ) ; 46 LD B,r | |
64f220e6 | 3830 | .dw (FETCH_A | OP_NOP | STORE_B ) ; 47 LD B,r |
fdcfcd44 L |
3831 | .dw (FETCH_B | OP_NOP | STORE_C ) ; 48 LD C,r |
3832 | .dw (FETCH_C | OP_NOP | STORE_C ) ; 49 LD C,r | |
3833 | .dw (FETCH_D | OP_NOP | STORE_C ) ; 4A LD C,r | |
3834 | .dw (FETCH_E | OP_NOP | STORE_C ) ; 4B LD C,r | |
3835 | .dw (FETCH_H | OP_NOP | STORE_C ) ; 4C LD C,r | |
3836 | .dw (FETCH_L | OP_NOP | STORE_C ) ; 4D LD C,r | |
3837 | .dw (FETCH_MHL | OP_NOP | STORE_C ) ; 4E LD C,r | |
64f220e6 | 3838 | .dw (FETCH_A | OP_NOP | STORE_C ) ; 4F LD C,r |
fdcfcd44 L |
3839 | .dw (FETCH_B | OP_NOP | STORE_D ) ; 50 LD D,r |
3840 | .dw (FETCH_C | OP_NOP | STORE_D ) ; 51 LD D,r | |
3841 | .dw (FETCH_D | OP_NOP | STORE_D ) ; 52 LD D,r | |
3842 | .dw (FETCH_E | OP_NOP | STORE_D ) ; 53 LD D,r | |
3843 | .dw (FETCH_H | OP_NOP | STORE_D ) ; 54 LD D,r | |
3844 | .dw (FETCH_L | OP_NOP | STORE_D ) ; 55 LD D,r | |
3845 | .dw (FETCH_MHL | OP_NOP | STORE_D ) ; 56 LD D,r | |
64f220e6 | 3846 | .dw (FETCH_A | OP_NOP | STORE_D ) ; 57 LD D,r |
fdcfcd44 L |
3847 | .dw (FETCH_B | OP_NOP | STORE_E ) ; 58 LD E,r |
3848 | .dw (FETCH_C | OP_NOP | STORE_E ) ; 59 LD E,r | |
3849 | .dw (FETCH_D | OP_NOP | STORE_E ) ; 5A LD E,r | |
3850 | .dw (FETCH_E | OP_NOP | STORE_E ) ; 5B LD E,r | |
3851 | .dw (FETCH_H | OP_NOP | STORE_E ) ; 5C LD E,r | |
3852 | .dw (FETCH_L | OP_NOP | STORE_E ) ; 5D LD E,r | |
3853 | .dw (FETCH_MHL | OP_NOP | STORE_E ) ; 5E LD E,r | |
64f220e6 | 3854 | .dw (FETCH_A | OP_NOP | STORE_E ) ; 5F LD E,r |
fdcfcd44 L |
3855 | .dw (FETCH_B | OP_NOP | STORE_H ) ; 60 LD H,r |
3856 | .dw (FETCH_C | OP_NOP | STORE_H ) ; 61 LD H,r | |
3857 | .dw (FETCH_D | OP_NOP | STORE_H ) ; 62 LD H,r | |
3858 | .dw (FETCH_E | OP_NOP | STORE_H ) ; 63 LD H,r | |
3859 | .dw (FETCH_H | OP_NOP | STORE_H ) ; 64 LD H,r | |
3860 | .dw (FETCH_L | OP_NOP | STORE_H ) ; 65 LD H,r | |
3861 | .dw (FETCH_MHL | OP_NOP | STORE_H ) ; 66 LD H,r | |
64f220e6 | 3862 | .dw (FETCH_A | OP_NOP | STORE_H ) ; 67 LD H,r |
fdcfcd44 L |
3863 | .dw (FETCH_B | OP_NOP | STORE_L ) ; 68 LD L,r |
3864 | .dw (FETCH_C | OP_NOP | STORE_L ) ; 69 LD L,r | |
3865 | .dw (FETCH_D | OP_NOP | STORE_L ) ; 6A LD L,r | |
3866 | .dw (FETCH_E | OP_NOP | STORE_L ) ; 6B LD L,r | |
3867 | .dw (FETCH_H | OP_NOP | STORE_L ) ; 6C LD L,r | |
3868 | .dw (FETCH_L | OP_NOP | STORE_L ) ; 6D LD L,r | |
3869 | .dw (FETCH_MHL | OP_NOP | STORE_L ) ; 6E LD L,r | |
64f220e6 | 3870 | .dw (FETCH_A | OP_NOP | STORE_L ) ; 6F LD L,r |
fdcfcd44 L |
3871 | .dw (FETCH_B | OP_NOP | STORE_MHL) ; 70 LD (HL),r |
3872 | .dw (FETCH_C | OP_NOP | STORE_MHL) ; 71 LD (HL),r | |
3873 | .dw (FETCH_D | OP_NOP | STORE_MHL) ; 72 LD (HL),r | |
3874 | .dw (FETCH_E | OP_NOP | STORE_MHL) ; 73 LD (HL),r | |
3875 | .dw (FETCH_H | OP_NOP | STORE_MHL) ; 74 LD (HL),r | |
3876 | .dw (FETCH_L | OP_NOP | STORE_MHL) ; 75 LD (HL),r | |
3877 | .dw (FETCH_NOP | OP_NOP | STORE_NOP) ; 76 HALT | |
64f220e6 | 3878 | .dw (FETCH_A | OP_NOP | STORE_MHL) ; 77 LD (HL),r |
fdcfcd44 L |
3879 | .dw (FETCH_B | OP_NOP | STORE_A ) ; 78 LD A,r |
3880 | .dw (FETCH_C | OP_NOP | STORE_A ) ; 79 LD A,r | |
3881 | .dw (FETCH_D | OP_NOP | STORE_A ) ; 7A LD A,r | |
3882 | .dw (FETCH_E | OP_NOP | STORE_A ) ; 7B LD A,r | |
3883 | .dw (FETCH_H | OP_NOP | STORE_A ) ; 7C LD A,r | |
3884 | .dw (FETCH_L | OP_NOP | STORE_A ) ; 7D LD A,r | |
3885 | .dw (FETCH_MHL | OP_NOP | STORE_A ) ; 7E LD A,r | |
64f220e6 | 3886 | .dw (FETCH_A | OP_NOP | STORE_A ) ; 7F LD A,r |
fdcfcd44 L |
3887 | .dw (FETCH_B | OP_ADDA | STORE_A ) ; 80 ADD A,r |
3888 | .dw (FETCH_C | OP_ADDA | STORE_A ) ; 81 ADD A,r | |
3889 | .dw (FETCH_D | OP_ADDA | STORE_A ) ; 82 ADD A,r | |
3890 | .dw (FETCH_E | OP_ADDA | STORE_A ) ; 83 ADD A,r | |
3891 | .dw (FETCH_H | OP_ADDA | STORE_A ) ; 84 ADD A,r | |
3892 | .dw (FETCH_L | OP_ADDA | STORE_A ) ; 85 ADD A,r | |
3893 | .dw (FETCH_MHL | OP_ADDA | STORE_A ) ; 86 ADD A,r | |
64f220e6 | 3894 | .dw (FETCH_A | OP_ADDA | STORE_A ) ; 87 ADD A,r |
fdcfcd44 L |
3895 | .dw (FETCH_B | OP_ADCA | STORE_A ) ; 88 ADC A,r |
3896 | .dw (FETCH_C | OP_ADCA | STORE_A ) ; 89 ADC A,r | |
3897 | .dw (FETCH_D | OP_ADCA | STORE_A ) ; 8A ADC A,r | |
3898 | .dw (FETCH_E | OP_ADCA | STORE_A ) ; 8B ADC A,r | |
3899 | .dw (FETCH_H | OP_ADCA | STORE_A ) ; 8C ADC A,r | |
3900 | .dw (FETCH_L | OP_ADCA | STORE_A ) ; 8D ADC A,r | |
3901 | .dw (FETCH_MHL | OP_ADCA | STORE_A ) ; 8E ADC A,r | |
64f220e6 | 3902 | .dw (FETCH_A | OP_ADCA | STORE_A ) ; 8F ADC A,r |
fdcfcd44 L |
3903 | .dw (FETCH_B | OP_SUBFA | STORE_A ) ; 90 SUB A,r |
3904 | .dw (FETCH_C | OP_SUBFA | STORE_A ) ; 91 SUB A,r | |
3905 | .dw (FETCH_D | OP_SUBFA | STORE_A ) ; 92 SUB A,r | |
3906 | .dw (FETCH_E | OP_SUBFA | STORE_A ) ; 93 SUB A,r | |
3907 | .dw (FETCH_H | OP_SUBFA | STORE_A ) ; 94 SUB A,r | |
3908 | .dw (FETCH_L | OP_SUBFA | STORE_A ) ; 95 SUB A,r | |
3909 | .dw (FETCH_MHL | OP_SUBFA | STORE_A ) ; 96 SUB A,r | |
64f220e6 | 3910 | .dw (FETCH_A | OP_SUBFA | STORE_A ) ; 97 SUB A,r |
fdcfcd44 L |
3911 | .dw (FETCH_B | OP_SBCFA | STORE_A ) ; 98 SBC A,r |
3912 | .dw (FETCH_C | OP_SBCFA | STORE_A ) ; 99 SBC A,r | |
3913 | .dw (FETCH_D | OP_SBCFA | STORE_A ) ; 9A SBC A,r | |
3914 | .dw (FETCH_E | OP_SBCFA | STORE_A ) ; 9B SBC A,r | |
3915 | .dw (FETCH_H | OP_SBCFA | STORE_A ) ; 9C SBC A,r | |
3916 | .dw (FETCH_L | OP_SBCFA | STORE_A ) ; 9D SBC A,r | |
3917 | .dw (FETCH_MHL | OP_SBCFA | STORE_A ) ; 9E SBC A,r | |
64f220e6 | 3918 | .dw (FETCH_A | OP_SBCFA | STORE_A ) ; 9F SBC A,r |
fdcfcd44 L |
3919 | .dw (FETCH_B | OP_ANDA | STORE_A ) ; A0 AND A,r |
3920 | .dw (FETCH_C | OP_ANDA | STORE_A ) ; A1 AND A,r | |
3921 | .dw (FETCH_D | OP_ANDA | STORE_A ) ; A2 AND A,r | |
3922 | .dw (FETCH_E | OP_ANDA | STORE_A ) ; A3 AND A,r | |
3923 | .dw (FETCH_H | OP_ANDA | STORE_A ) ; A4 AND A,r | |
3924 | .dw (FETCH_L | OP_ANDA | STORE_A ) ; A5 AND A,r | |
3925 | .dw (FETCH_MHL | OP_ANDA | STORE_A ) ; A6 AND A,r | |
64f220e6 | 3926 | .dw (FETCH_A | OP_ANDA | STORE_A ) ; A7 AND A,r |
fdcfcd44 L |
3927 | .dw (FETCH_B | OP_XORA | STORE_A ) ; A8 XOR A,r |
3928 | .dw (FETCH_C | OP_XORA | STORE_A ) ; A9 XOR A,r | |
3929 | .dw (FETCH_D | OP_XORA | STORE_A ) ; AA XOR A,r | |
3930 | .dw (FETCH_E | OP_XORA | STORE_A ) ; AB XOR A,r | |
3931 | .dw (FETCH_H | OP_XORA | STORE_A ) ; AC XOR A,r | |
3932 | .dw (FETCH_L | OP_XORA | STORE_A ) ; AD XOR A,r | |
3933 | .dw (FETCH_MHL | OP_XORA | STORE_A ) ; AE XOR A,r | |
64f220e6 | 3934 | .dw (FETCH_A | OP_XORA | STORE_A ) ; AF XOR A,r |
fdcfcd44 L |
3935 | .dw (FETCH_B | OP_ORA | STORE_A ) ; B0 OR A,r |
3936 | .dw (FETCH_C | OP_ORA | STORE_A ) ; B1 OR A,r | |
3937 | .dw (FETCH_D | OP_ORA | STORE_A ) ; B2 OR A,r | |
3938 | .dw (FETCH_E | OP_ORA | STORE_A ) ; B3 OR A,r | |
3939 | .dw (FETCH_H | OP_ORA | STORE_A ) ; B4 OR A,r | |
3940 | .dw (FETCH_L | OP_ORA | STORE_A ) ; B5 OR A,r | |
3941 | .dw (FETCH_MHL | OP_ORA | STORE_A ) ; B6 OR A,r | |
64f220e6 | 3942 | .dw (FETCH_A | OP_ORA | STORE_A ) ; B7 OR A,r |
fdcfcd44 L |
3943 | .dw (FETCH_B | OP_SUBFA | STORE_NOP) ; B8 CP A,r |
3944 | .dw (FETCH_C | OP_SUBFA | STORE_NOP) ; B9 CP A,r | |
3945 | .dw (FETCH_D | OP_SUBFA | STORE_NOP) ; BA CP A,r | |
3946 | .dw (FETCH_E | OP_SUBFA | STORE_NOP) ; BB CP A,r | |
3947 | .dw (FETCH_H | OP_SUBFA | STORE_NOP) ; BC CP A,r | |
3948 | .dw (FETCH_L | OP_SUBFA | STORE_NOP) ; BD CP A,r | |
3949 | .dw (FETCH_MHL | OP_SUBFA | STORE_NOP) ; BE CP A,r | |
64f220e6 | 3950 | .dw (FETCH_A | OP_SUBFA | STORE_NOP) ; BF CP A,r |
fdcfcd44 L |
3951 | .dw (FETCH_NOP | OP_IFNZ | STORE_RET) ; C0 RET NZ |
3952 | .dw (FETCH_NOP | OP_POP16 | STORE_BC ) ; C1 POP BC | |
3953 | .dw (FETCH_DIR16| OP_IFNZ | STORE_PC ) ; C2 nn nn JP NZ,nn | |
3954 | .dw (FETCH_DIR16| OP_NOP | STORE_PC ) ; C3 nn nn JP nn | |
3955 | .dw (FETCH_DIR16| OP_IFNZ | STORE_CALL) ; C4 nn nn CALL NZ,nn | |
3956 | .dw (FETCH_BC | OP_PUSH16 | STORE_NOP) ; C5 PUSH BC | |
3957 | .dw (FETCH_DIR8 | OP_ADDA | STORE_A ) ; C6 nn ADD A,n | |
3958 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; C7 RST 0 | |
3959 | .dw (FETCH_NOP | OP_IFZ | STORE_RET) ; C8 RET Z | |
3960 | .dw (FETCH_NOP | OP_NOP | STORE_RET) ; C9 RET | |
3961 | .dw (FETCH_DIR16| OP_IFZ | STORE_PC ) ; CA nn nn JP Z,nn | |
3962 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; CB (Z80 specific) | |
3963 | .dw (FETCH_DIR16| OP_IFZ | STORE_CALL) ; CC nn nn CALL Z,nn | |
3964 | .dw (FETCH_DIR16| OP_NOP | STORE_CALL) ; CD nn nn CALL nn | |
3965 | .dw (FETCH_DIR8 | OP_ADCA | STORE_A ) ; CE nn ADC A,n | |
3966 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; CF RST 8H | |
3967 | .dw (FETCH_NOP | OP_IFNC | STORE_RET) ; D0 RET NC | |
3968 | .dw (FETCH_NOP | OP_POP16 | STORE_DE ) ; D1 POP DE | |
3969 | .dw (FETCH_DIR16| OP_IFNC | STORE_PC ) ; D2 nn nn JP NC,nn | |
3970 | .dw (FETCH_DIR8 | OP_OUTA | STORE_NOP) ; D3 nn OUT (n),A | |
3971 | .dw (FETCH_DIR16| OP_IFNC | STORE_CALL) ; D4 nn nn CALL NC,nn | |
3972 | .dw (FETCH_DE | OP_PUSH16 | STORE_NOP) ; D5 PUSH DE | |
3973 | .dw (FETCH_DIR8 | OP_SUBFA | STORE_A ) ; D6 nn SUB n | |
3974 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; D7 RST 10H | |
3975 | .dw (FETCH_NOP | OP_IFC | STORE_RET) ; D8 RET C | |
99ed7199 | 3976 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; D9 EXX (Z80) |
fdcfcd44 L |
3977 | .dw (FETCH_DIR16| OP_IFC | STORE_PC ) ; DA nn nn JP C,nn |
3978 | .dw (FETCH_DIR8 | OP_IN | STORE_A ) ; DB nn IN A,(n) | |
3979 | .dw (FETCH_DIR16| OP_IFC | STORE_CALL) ; DC nn nn CALL C,nn | |
3980 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; DD (Z80) | |
3981 | .dw (FETCH_DIR8 | OP_SBCFA | STORE_A ) ; DE nn SBC A,n | |
3982 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; DF RST 18H | |
3983 | .dw (FETCH_NOP | OP_IFPO | STORE_RET) ; E0 RET PO | |
3984 | .dw (FETCH_NOP | OP_POP16 | STORE_HL ) ; E1 POP HL | |
3985 | .dw (FETCH_DIR16| OP_IFPO | STORE_PC ) ; E2 nn nn JP PO,nn | |
3986 | .dw (FETCH_MSP | OP_EXHL | STORE_MSP) ; E3 EX (SP),HL | |
3987 | .dw (FETCH_DIR16| OP_IFPO | STORE_CALL) ; E4 nn nn CALL PO,nn | |
3988 | .dw (FETCH_HL | OP_PUSH16 | STORE_NOP) ; E5 PUSH HL | |
3989 | .dw (FETCH_DIR8 | OP_ANDA | STORE_A ) ; E6 nn AND n | |
3990 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; E7 RST 20H | |
3991 | .dw (FETCH_NOP | OP_IFPE | STORE_RET) ; E8 RET PE | |
3992 | .dw (FETCH_HL | OP_NOP | STORE_PC ) ; E9 JP (HL) | |
3993 | .dw (FETCH_DIR16| OP_IFPE | STORE_PC ) ; EA nn nn JP PE,nn | |
3994 | .dw (FETCH_DE | OP_EXHL | STORE_DE ) ; EB EX DE,HL | |
3995 | .dw (FETCH_DIR16| OP_IFPE | STORE_CALL) ; EC nn nn CALL PE,nn | |
3996 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; ED (Z80 specific) | |
3997 | .dw (FETCH_DIR8 | OP_XORA | STORE_A ) ; EE nn XOR n | |
3998 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; EF RST 28H | |
3999 | .dw (FETCH_NOP | OP_IFP | STORE_RET) ; F0 RET P | |
4000 | .dw (FETCH_NOP | OP_POP16 | STORE_AF ) ; F1 POP AF | |
4001 | .dw (FETCH_DIR16| OP_IFP | STORE_PC ) ; F2 nn nn JP P,nn | |
4002 | .dw (FETCH_NOP | OP_DI | STORE_NOP) ; F3 DI | |
4003 | .dw (FETCH_DIR16| OP_IFP | STORE_CALL) ; F4 nn nn CALL P,nn | |
4004 | .dw (FETCH_AF | OP_PUSH16 | STORE_NOP) ; F5 PUSH AF | |
4005 | .dw (FETCH_DIR8 | OP_ORA | STORE_A ) ; F6 nn OR n | |
4006 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; F7 RST 30H | |
4007 | .dw (FETCH_NOP | OP_IFM | STORE_RET) ; F8 RET M | |
4008 | .dw (FETCH_HL | OP_NOP | STORE_SP ) ; F9 LD SP,HL | |
4009 | .dw (FETCH_DIR16| OP_IFM | STORE_PC ) ; FA nn nn JP M,nn | |
4010 | .dw (FETCH_NOP | OP_EI | STORE_NOP) ; FB EI | |
4011 | .dw (FETCH_DIR16| OP_IFM | STORE_CALL) ; FC nn nn CALL M,nn | |
4012 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; FD (Z80 specific) | |
4013 | .dw (FETCH_DIR8 | OP_SUBFA | STORE_NOP) ; FE nn CP n | |
4014 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; FF RST 38H | |
37617bd8 L |
4015 | |
4016 | ; vim:set ts=8 noet nowrap |