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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 | ; | |
19 | ; $Id$ | |
20 | ; | |
21 | ||
22 | ;.nolist | |
23 | #if defined atmega8 | |
24 | .include "m8def.inc" | |
25 | #elif defined atmega168 | |
26 | .include "m168def.inc" | |
27 | #elif defined atmega328P | |
28 | .include "m328Pdef.inc" | |
29 | #else /* default */ | |
30 | .include "m88def.inc" | |
31 | ;FUSE_H=0xDF | |
32 | ;FUSE_L=0xF7 | |
33 | #endif | |
34 | .list | |
35 | .listmac | |
36 | ||
37 | ||
38 | ||
39 | #ifndef F_CPU | |
40 | #define F_CPU 20000000 /* system clock in Hz; defaults to 20MHz */ | |
41 | #endif | |
42 | #ifndef BAUD | |
43 | #define BAUD 38400 /* console baud rate */ | |
44 | #endif | |
45 | ||
46 | #define PARTID 0x52 /* Partition table id */ | |
47 | /* http://www.win.tue.nl/~aeb/partitions/partition_types-1.html */ | |
48 | ||
49 | #define UBRR_VAL ((F_CPU+BAUD*8)/(BAUD*16)-1) /* clever rounding */ | |
50 | ||
51 | #define RXBUFSIZE 64 /* USART recieve buffer size. Must be power of 2 */ | |
52 | #define TXBUFSIZE 64 /* USART transmit buffer size. Must be power of 2 */ | |
53 | ||
54 | #define DRAM_WAITSTATES 1 /* Number of additional clock cycles for dram read access */ | |
55 | #define REFR_RATE 64000 /* dram refresh rate in cycles/s. */ | |
56 | /* Most drams need 1/15.6µs. */ | |
57 | #define REFR_PRE 8 /* timer prescale factor */ | |
58 | #define REFR_CS 0x02 /* timer clock select for 1/8 */ | |
59 | #define REFR_CNT F_CPU / REFR_RATE / REFR_PRE | |
60 | ||
61 | ||
62 | ||
63 | #define DRAM_WORD_ACCESS 0 /* experimental */ | |
64 | ||
65 | #define EM_Z80 0 /* we don't have any z80 instructions yet */ | |
66 | ||
67 | .equ MMC_DEBUG = 0 | |
68 | .equ INS_DEBUG = 0 | |
69 | .equ MEMTEST = 1 | |
70 | .equ BOOTWAIT = 1 | |
71 | .equ PORT_DEBUG = 0 | |
72 | .equ DISK_DEBUG = 0 | |
73 | .equ MEMFILL_CB = 1 | |
74 | .equ STACK_DBG = 0 | |
75 | .equ PRINT_PC = 0 | |
76 | ||
77 | ;Port declarations | |
78 | ||
79 | ; Port D | |
80 | .equ rxd = 0 | |
81 | .equ txd = 1 | |
82 | .equ ram_oe = 2 | |
83 | .equ ram_a8 = 3 | |
84 | .equ mmc_cs = 4 | |
85 | .equ ram_a5 = 5 | |
86 | .equ ram_a6 = 6 | |
87 | .equ ram_a7 = 7 | |
88 | ||
89 | .equ P_OE = PORTD | |
90 | .equ P_AH = PORTD | |
91 | .equ P_A8 = PORTD | |
92 | .equ P_MMC_CS = PORTD | |
93 | ; ram_a[7..5] | |
94 | .equ RAM_AH_MASK = (1<<ram_a8)|(1<<ram_a7)|(1<<ram_a6)|(1<<ram_a5) | |
95 | .equ PD_OUTPUT_MASK = (1<<mmc_cs) | (1<<ram_oe) | RAM_AH_MASK | |
96 | ||
97 | ||
98 | ;Port B | |
99 | .equ ram_a4 = 0 | |
100 | .equ ram_a3 = 1 | |
101 | .equ ram_a2 = 2 | |
102 | .equ ram_a1 = 3 | |
103 | .equ mmc_mosi = 3 | |
104 | .equ ram_a0 = 4 | |
105 | .equ mmc_miso = 4 | |
106 | .equ ram_ras = 5 | |
107 | .equ mmc_sck = 5 | |
108 | ||
109 | ||
110 | .equ P_RAS = PORTB | |
111 | .equ P_AL = PORTB | |
112 | ; ram_a[4..0] | |
113 | .equ RAM_AL_MASK = (1<<ram_a4)|(1<<ram_a3)|(1<<ram_a2)|(1<<ram_a1)|(1<<ram_a0) | |
114 | .equ PB_OUTPUT_MASK = (1<<ram_ras) | RAM_AL_MASK | |
115 | ||
116 | ;Port C | |
117 | .equ ram_d0 = 0 | |
118 | .equ ram_d1 = 1 | |
119 | .equ ram_d2 = 2 | |
120 | .equ ram_d3 = 3 | |
121 | .equ ram_w = 4 | |
122 | .equ ram_cas= 5 | |
123 | ||
124 | .equ P_DQ = PORTC | |
125 | .equ P_W = PORTC | |
126 | .equ P_CAS = PORTC | |
127 | .equ RAM_DQ_MASK = (1<<ram_d3)|(1<<ram_d2)|(1<<ram_d1)|(1<<ram_d0) | |
128 | .equ PC_OUTPUT_MASK = (1<<ram_cas)|(1<<ram_w) | |
129 | ||
130 | ||
131 | ;Flag bits in z_flags | |
132 | .equ ZFL_S = 7 | |
133 | .equ ZFL_Z = 6 | |
134 | .equ ZFL_H = 4 | |
135 | .equ ZFL_P = 2 | |
136 | .equ ZFL_N = 1 | |
137 | .equ ZFL_C = 0 | |
138 | ||
139 | ;Register definitions | |
140 | ||
141 | .def _tmp = r0 ; 0 | |
142 | .def _0 = r1 | |
143 | ||
144 | .def z_c = r4 | |
145 | .def z_b = r5 | |
146 | .def z_e = r6 | |
147 | .def z_d = r7 | |
148 | .def z_l = r8 | |
149 | .def z_h = r9 | |
150 | .def z_a = r10 | |
151 | ||
152 | .def insdecl = r12 ; | |
153 | .def insdech = r13 ; | |
154 | .def z_spl = r14 | |
155 | .def z_sph = r15 ; | |
156 | .def temp = r16 ; | |
157 | .def temp2 = r17 ; | |
158 | .def temp3 = r18 | |
159 | .def temp4 = r19 | |
160 | .def z_flags = r20 ; | |
161 | ; | |
162 | .def opl = r22 ; | |
163 | .def oph = r23 ; | |
164 | .def z_pcl = r24 ; | |
165 | .def z_pch = r25 ; | |
166 | ; xl ;r26 | |
167 | ; xh ;r27 | |
168 | ; yl ;r28 | |
169 | ; yh ;r29 | |
170 | ; zl ;r30 ; | |
171 | ; zh ;r31 ; | |
172 | ||
173 | ||
174 | ||
175 | #if defined __ATmega8__ | |
176 | .equ flags = TWBR | |
177 | .equ P_PUD = SFIOR | |
178 | #else | |
179 | .equ flags = GPIOR0 | |
180 | .equ P_PUD = MCUCR | |
181 | #endif | |
182 | ||
183 | ; Flags: | |
184 | .equ hostact = 7 ;host active flag | |
185 | .equ hostwrt = 6 ;host written flag | |
186 | .equ rsflag = 5 ;read sector flag | |
187 | .equ readop = 4 ;1 if read operation | |
188 | .equ trace = 0 | |
189 | ||
190 | ; This is the base z80 port address for clock access | |
191 | #define TIMERPORT 0x40 | |
192 | #define TIMER_CTL TIMERPORT | |
193 | #define TIMER_MSECS TIMERPORT+1 | |
194 | #define TIMER_SECS TIMER_MSECS+2 | |
195 | ||
196 | #define starttimercmd 1 | |
197 | #define quitTimerCmd 2 | |
198 | #define printTimerCmd 15 | |
199 | #define uptimeCmd 16 | |
200 | ||
201 | #if defined __ATmega8__ | |
202 | .equ RXTXDR0 = UDR | |
203 | .equ UCSR0A = UCSRA | |
204 | .equ UDRE0 = UDRE | |
205 | .equ UCSR0B = UCSRB | |
206 | .equ RXCIE0 = RXCIE | |
207 | .equ UDRIE0 = UDRIE | |
208 | .equ RXEN0 = RXEN | |
209 | .equ TXEN0 = TXEN | |
210 | .equ UCSR0C = UCSRC | |
211 | .equ UCSZ00 = UCSZ0 | |
212 | .equ UCSZ01 = UCSZ1 | |
213 | .equ UBRR0H = UBRRH | |
214 | .equ UBRR0L = UBRRL | |
215 | .equ OCR2A = OCR2 | |
216 | .equ OC2Aaddr= OC2addr | |
217 | .equ TCCR2A = TCCR2 | |
218 | .equ TCCR2B = TCCR2 | |
219 | .equ TIMSK1 = TIMSK | |
220 | .equ TIMSK2 = TIMSK | |
221 | .equ OCIE2A = OCIE2 | |
222 | .equ TIFR1 = TIFR | |
223 | .equ ICIE1 = TICIE1 | |
224 | #else | |
225 | .equ RXTXDR0 = UDR0 | |
226 | #endif | |
227 | ||
228 | ||
229 | ;---------------------------------------- | |
230 | ; | |
231 | .macro outm8 | |
232 | .if @0 > 0x3f | |
233 | sts @0,@1 | |
234 | .else | |
235 | out @0,@1 | |
236 | .endif | |
237 | .endm | |
238 | ||
239 | ;---------------------------------------- | |
240 | ; | |
241 | .macro inm8 | |
242 | .if @1 > 0x3f | |
243 | lds @0,@1 | |
244 | .else | |
245 | in @0,@1 | |
246 | .endif | |
247 | .endm | |
248 | ||
249 | ||
250 | ||
251 | ;---------------------------------------- | |
252 | ; add wait states | |
253 | ; dram_wait number_of_cycles | |
254 | ||
255 | .macro dram_wait | |
256 | .if @0 > 1 | |
257 | rjmp PC+1 | |
258 | dram_wait @0 - 2 | |
259 | .elif @0 > 0 | |
260 | nop | |
261 | dram_wait @0 - 1 | |
262 | .endif | |
263 | .endm | |
264 | ||
265 | ||
266 | .cseg | |
267 | .org 0 | |
268 | rjmp start ; reset vector | |
269 | .org OC2Aaddr | |
270 | rjmp refrint ; tim2cmpa | |
271 | .org OC1Aaddr ; Timer/Counter1 Compare Match A | |
272 | rjmp sysclockint ; 1ms system timer | |
273 | .org URXCaddr | |
274 | rjmp rxint ; USART receive int. | |
275 | .org UDREaddr | |
276 | rjmp txint ; USART transmit int. | |
277 | ||
278 | .org INT_VECTORS_SIZE | |
279 | ||
280 | start: | |
281 | ldi temp,low(RAMEND) ; top of memory | |
282 | out SPL,temp ; init stack pointer | |
283 | ldi temp,high(RAMEND) ; top of memory | |
284 | out SPH,temp ; init stack pointer | |
285 | ||
286 | clr _0 | |
287 | ||
288 | ; - Kill wdt | |
289 | wdr | |
290 | out MCUSR,_0 | |
291 | ||
292 | ldi temp,(1<<WDCE) | (1<<WDE) | |
293 | outm8 WDTCSR,temp | |
294 | ldi temp,(1<<WDCE) | |
295 | outm8 WDTCSR,temp | |
296 | ||
297 | ; - Clear RAM | |
298 | ||
299 | ldi zl,low(SRAM_START) | |
300 | ldi zh,high(SRAM_START) | |
301 | ldi temp2,high(ramtop) | |
302 | clr_l: | |
303 | st z+,_0 | |
304 | cpi zl,low(ramtop) | |
305 | cpc zh,temp2 | |
306 | brne clr_l | |
307 | ||
308 | ; - Setup Ports | |
309 | ldi temp,(1<<PUD) ;disable pullups | |
310 | outm8 P_PUD,temp | |
311 | ldi temp,0xFF | |
312 | out PORTD,temp ;all pins high | |
313 | out PORTB,temp | |
314 | out PORTC,temp | |
315 | out DDRD,temp ; all outputs | |
316 | out DDRB,temp | |
317 | out DDRC,temp | |
318 | ||
319 | outm8 TIMSK1,_0 | |
320 | outm8 TIMSK2,_0 | |
321 | outm8 TCCR2A,_0 | |
322 | outm8 TCCR2B,_0 | |
323 | ||
324 | ||
325 | ; - Init serial port | |
326 | ||
327 | ldi temp, (1<<TXEN0) | (1<<RXEN0) | (1<<RXCIE0) | |
328 | outm8 UCSR0B,temp | |
329 | .ifdef URSEL | |
330 | ldi temp, (1<<URSEL) | (1<<UCSZ01) | (1<<UCSZ00) | |
331 | .else | |
332 | ldi temp, (1<<UCSZ01) | (1<<UCSZ00) | |
333 | .endif | |
334 | outm8 UCSR0C,temp | |
335 | ldi temp, HIGH(UBRR_VAL) | |
336 | outm8 UBRR0H,temp | |
337 | ldi temp, LOW(UBRR_VAL) | |
338 | outm8 UBRR0L,temp | |
339 | ||
340 | ; Init clock/timer system | |
341 | ||
342 | ; Init timer 1 as 1 ms system clock tick. | |
343 | ||
344 | ldi temp,high(F_CPU/1000) | |
345 | outm8 OCR1AH,temp | |
346 | ldi temp,low(F_CPU/1000) | |
347 | outm8 OCR1AL,temp | |
348 | ldi temp,(1<<WGM12) | (1<<CS10) ;CTC, clk/1 | |
349 | outm8 TCCR1B,temp | |
350 | inm8 temp,TIMSK1 | |
351 | ori temp,(1<<OCIE1A) | |
352 | outm8 TIMSK1,temp | |
353 | ||
354 | ;Init timer2. Refresh-call should happen every (8ms/512)=312 cycles. | |
355 | ||
356 | ldi temp,REFR_CNT*2 ; 2 cycles per int | |
357 | outm8 OCR2A,temp | |
358 | inm8 temp,TCCR2A | |
359 | ori temp,(1<<WGM21) ;CTC mode | |
360 | outm8 TCCR2A,temp | |
361 | inm8 temp,TCCR2B | |
362 | ori temp,REFR_CS ;clk/REFR_PRE | |
363 | outm8 TCCR2B,temp | |
364 | inm8 temp,TIMSK2 | |
365 | ori temp, (1<<OCIE2A) | |
366 | outm8 TIMSK2,temp | |
367 | ||
368 | sei | |
369 | ||
370 | ||
371 | .if BOOTWAIT | |
372 | ldi temp,10 | |
373 | rcall delay_ms | |
374 | ||
375 | .endif | |
376 | ||
377 | rcall printstr | |
378 | .db "CPM on an AVR, v1.0",13,0,0 | |
379 | ||
380 | ||
381 | rcall printstr | |
382 | .db "Initing mmc...",13,0 | |
383 | rcall mmcInit | |
384 | ||
385 | ||
386 | .if MEMTEST | |
387 | rcall printstr | |
388 | .db "Testing RAM: fill...",0,0 | |
389 | ||
390 | ;Fill RAM | |
391 | ldi xl,0 | |
392 | ldi xh,0 | |
393 | ramtestw: | |
394 | mov temp,xh | |
395 | eor temp,xl | |
396 | rcall memwritebyte | |
397 | adiw xl,1 | |
398 | brcc ramtestw | |
399 | rcall printstr | |
400 | .db "wait...",0 | |
401 | ||
402 | ldi temp2,8 | |
403 | ramtestwl: | |
404 | ldi temp,255 | |
405 | rcall delay_ms | |
406 | dec temp2 | |
407 | brne ramtestwl | |
408 | ||
409 | rcall printstr | |
410 | .db "reread...",13,0,0 | |
411 | ||
412 | ;re-read RAM | |
413 | ldi xl,0 | |
414 | ldi xh,0 | |
415 | ramtestr: | |
416 | rcall memReadByte | |
417 | mov temp2,xh | |
418 | eor temp2,xl | |
419 | cp temp,temp2 | |
420 | breq ramtestrok | |
421 | rcall printhex | |
422 | ldi temp,'<' | |
423 | rcall uartPutc | |
424 | mov temp,xh | |
425 | eor temp,xl | |
426 | rcall printhex | |
427 | ldi temp,'@' | |
428 | rcall uartPutc | |
429 | mov temp,xh | |
430 | rcall printhex | |
431 | mov temp,xl | |
432 | rcall printhex | |
433 | ldi temp,13 | |
434 | rcall uartPutc | |
435 | ramtestrok: | |
436 | adiw xl,1 | |
437 | brcc ramtestr | |
438 | ||
439 | .endif | |
440 | ||
441 | .if MEMFILL_CB | |
442 | ;Fill ram with cbs, which (for now) will trigger an invalid opcode error. | |
443 | ldi xl,0 | |
444 | ldi xh,0 | |
445 | ramfillw: | |
446 | ldi temp,0xcb | |
447 | rcall memwritebyte | |
448 | adiw xl,1 | |
449 | brcc ramfillw | |
450 | .endif | |
451 | ||
452 | ||
453 | ||
454 | ;---------------------------------------------------------------------------- | |
455 | ||
456 | ; Offsets: | |
457 | #define PART_TYPE 4 | |
458 | #define PART_START 8 | |
459 | #define PART_SIZE 12 | |
460 | ||
461 | ;Load first sector from MMC (boot sector) | |
462 | ||
463 | boot_again: | |
464 | ldi yh,0 | |
465 | ldi yl,0 | |
466 | ldi xh,0 | |
467 | ldi xl,0 | |
468 | rcall mmcReadSect | |
469 | ||
470 | ;Test, if it has a valid MBR | |
471 | ||
472 | lds temp,hostbuf+510 ;MBR signature (0xAA55) at and of sector? | |
473 | lds temp2,hostbuf+511 | |
474 | ldi temp4,0xAA | |
475 | cpi temp,0x55 | |
476 | cpc temp2,temp4 | |
477 | breq boot_part | |
478 | ||
479 | ;No MBR, no partition table ... | |
480 | ldi opl,1 | |
481 | sts ndisks,opl | |
482 | rjmp boot_ipl | |
483 | ||
484 | ;Search Partition Table for CP/M partitions | |
485 | boot_part: | |
486 | ldi zl,low(hostbuf+510-64) | |
487 | ldi zh,high(hostbuf+510-64) | |
488 | ldi yl,low(hostdstart) | |
489 | ldi yh,high(hostdstart) | |
490 | ldi opl,0 | |
491 | ldi oph,high(hostbuf+510) | |
492 | boot_ploop: | |
493 | ldd temp,z+PART_TYPE | |
494 | cpi temp,PARTID | |
495 | brne boot_nextp | |
496 | ||
497 | ldd temp,z+PART_START | |
498 | st y+,temp | |
499 | ldd temp2,z+PART_START+1 | |
500 | st y+,temp2 | |
501 | ldd temp3,z+PART_START+2 | |
502 | st y+,temp3 | |
503 | ldd temp4,z+PART_START+3 | |
504 | st y+,temp4 | |
505 | ||
506 | rcall printstr | |
507 | .db "CP/M partition at: ",0 | |
508 | rcall print_ultoa | |
509 | rcall printstr | |
510 | .db ", size: ",0,0 | |
511 | ldd temp,z+PART_SIZE | |
512 | ldd temp2,z+PART_SIZE+1 | |
513 | ldd temp3,z+PART_SIZE+2 | |
514 | ldd temp4,z+PART_SIZE+3 | |
515 | lsr temp4 | |
516 | ror temp3 | |
517 | ror temp2 | |
518 | ror temp | |
519 | rcall print_ultoa | |
520 | rcall printstr | |
521 | .db "KB.",13,0,0 | |
522 | ||
523 | inc opl | |
524 | cpi temp2,MAXDISKS | |
525 | breq boot_pend | |
526 | boot_nextp: | |
527 | adiw zl,16 | |
528 | cpi zl,low(hostbuf+510) | |
529 | cpc zh,oph | |
530 | brsh boot_pend | |
531 | rjmp boot_ploop | |
532 | boot_pend: | |
533 | sts ndisks,opl | |
534 | ||
535 | ; Read first sector of first CP/M partition | |
536 | ||
537 | lds xl,hostdstart | |
538 | lds xh,hostdstart+1 | |
539 | lds yl,hostdstart+2 | |
540 | lds yh,hostdstart+3 | |
541 | rcall mmcReadSect | |
542 | ||
543 | boot_ipl: | |
544 | lds opl,ndisks | |
545 | tst opl | |
546 | brne boot_ipl2 | |
547 | rcall printstr | |
548 | .db "No bootable CP/M disk found! Please change MMC/SD-Card",13,0 | |
549 | ldi temp2,18 | |
550 | boot_wl: | |
551 | ldi temp,255 | |
552 | rcall delay_ms | |
553 | dec temp2 | |
554 | brne boot_wl | |
555 | rjmp boot_again | |
556 | ||
557 | ||
558 | boot_ipl2: | |
559 | ||
560 | ;First sector of disk or first CP/M partition is in hostbuf. | |
561 | ||
562 | ;Save to Z80 RAM (only 128 bytes because that's retro) | |
563 | ldi zl,low(hostbuf) | |
564 | ldi zh,high(hostbuf) | |
565 | ldi xh,0x20 | |
566 | ldi xl,0x00 | |
567 | iplwriteloop: | |
568 | ld temp,z+ | |
569 | rcall memWriteByte | |
570 | adiw xl,1 | |
571 | cpi zl,low(hostbuf+128) | |
572 | brne iplwriteloop | |
573 | cpi zh,high(hostbuf+128) | |
574 | brne iplwriteloop | |
575 | rcall dsk_boot ;init (de)blocking buffer | |
576 | ||
577 | ||
578 | ;Init z80 | |
579 | ldi temp,0x00 | |
580 | mov z_pcl,temp | |
581 | ldi temp,0x20 | |
582 | mov z_pch,temp | |
583 | ||
584 | cbi flags,trace | |
585 | rcall printstr | |
586 | .db 13,"Ok, CPU is live!",13,0,0 | |
587 | ||
588 | main: | |
589 | cbi flags,trace | |
590 | cpi z_pch,1 | |
591 | brlo notraceon | |
592 | cpi z_pch,$dc | |
593 | brsh notraceon | |
594 | sbi flags,trace | |
595 | notraceon: | |
596 | ||
597 | ||
598 | .if PRINT_PC | |
599 | cpi z_pch,1 | |
600 | brlo noprintpc | |
601 | cpi z_pch,0xdc | |
602 | brsh noprintpc | |
603 | ||
604 | rcall printstr | |
605 | .db "PC=",0 | |
606 | mov temp,z_pch | |
607 | rcall printhex | |
608 | mov temp,z_pcl | |
609 | rcall printhex | |
610 | ldi temp,10 | |
611 | rcall uartputc | |
612 | noprintpc: | |
613 | .endif | |
614 | ||
615 | ; *** Stage 1: Fetch next opcode | |
616 | movw xl,z_pcl | |
617 | rcall memReadByte | |
618 | ||
619 | ||
620 | .if INS_DEBUG | |
621 | sbis flags,trace | |
622 | rjmp notrace1 | |
623 | rcall printstr | |
624 | .db "PC=",0 | |
625 | push temp | |
626 | mov temp,z_pch | |
627 | rcall printhex | |
628 | mov temp,z_pcl | |
629 | rcall printhex | |
630 | pop temp | |
631 | rcall printstr | |
632 | .db ", opcode=",0 | |
633 | rcall printhex | |
634 | notrace1: | |
635 | .endif | |
636 | adiw z_pcl,1 | |
637 | ||
638 | ; *** Stage 2: Decode it using the ins_table. | |
639 | ldi zh,high(inst_table*2) | |
640 | mov zl,temp | |
641 | add zl,temp | |
642 | adc zh,_0 | |
643 | lpm insdecl,Z+ | |
644 | lpm insdech,Z | |
645 | ||
646 | .if INS_DEBUG | |
647 | sbis flags,trace | |
648 | rjmp notrace2 | |
649 | rcall printstr | |
650 | .db ", decoded=",0,0 | |
651 | mov temp,insdech | |
652 | rcall printhex | |
653 | mov temp,insdecl | |
654 | rcall printhex | |
655 | rcall printstr | |
656 | .db ".",13,0,0 | |
657 | notrace2: | |
658 | .endif | |
659 | ||
660 | ; *** Stage 3: Fetch operand. Use the fetch jumptable for this. | |
661 | mov temp,insdecl | |
662 | andi temp,0x1F | |
663 | breq nofetch | |
664 | ldi zl,low(fetchjumps) | |
665 | ldi zh,high(fetchjumps) | |
666 | add zl,temp | |
667 | adc zh,_0 | |
668 | icall | |
669 | ||
670 | .if INS_DEBUG | |
671 | sbis flags,trace | |
672 | rjmp notrace3 | |
673 | rcall printstr | |
674 | .db "pre: oph:l=",0 | |
675 | mov temp,oph | |
676 | rcall printhex | |
677 | mov temp,opl | |
678 | rcall printhex | |
679 | rcall printstr | |
680 | .db " -- ",0,0 | |
681 | notrace3: | |
682 | .endif | |
683 | ||
684 | nofetch: | |
685 | ; *** Stage 4: Execute operation :) Use the op jumptable for this. | |
686 | mov temp,insdech | |
687 | andi temp,0xFC | |
688 | breq nooper | |
689 | lsr temp | |
690 | lsr temp | |
691 | ldi zl,low(opjumps) | |
692 | ldi zh,high(opjumps) | |
693 | add zl,temp | |
694 | adc zh,_0 | |
695 | icall | |
696 | ||
697 | .if INS_DEBUG | |
698 | sbis flags,trace | |
699 | rjmp notrace4 | |
700 | rcall printstr | |
701 | .db ",post:oph:l=",0,0 | |
702 | mov temp,oph | |
703 | rcall printhex | |
704 | mov temp,opl | |
705 | rcall printhex | |
706 | notrace4: | |
707 | .endif | |
708 | ||
709 | nooper: | |
710 | ; *** Stage 5: Store operand. Use the store jumptable for this. | |
711 | swap insdecl | |
712 | swap insdech | |
713 | movw temp,insdecl | |
714 | andi temp,0x0E | |
715 | andi temp2,0x30 | |
716 | or temp,temp2 | |
717 | breq nostore | |
718 | lsr temp | |
719 | ldi zl,low(storejumps) | |
720 | ldi zh,high(storejumps) | |
721 | add zl,temp | |
722 | adc zh,_0 | |
723 | icall | |
724 | ||
725 | .if INS_DEBUG | |
726 | sbis flags,trace | |
727 | rjmp notrace5 | |
728 | rcall printstr | |
729 | .db ", stored.",0 | |
730 | notrace5: | |
731 | .endif | |
732 | ||
733 | nostore: | |
734 | ||
735 | .if INS_DEBUG | |
736 | sbis flags,trace | |
737 | rjmp notrace6 | |
738 | rcall printstr | |
739 | .db 13,0 | |
740 | notrace6: | |
741 | .endif | |
742 | ||
743 | ;All done. Neeeext! | |
744 | rjmp main | |
745 | ||
746 | ||
747 | ; ----------------Virtual peripherial interface ------ | |
748 | ||
749 | ;The hw is modelled to make writing a CPM BIOS easier. | |
750 | ;Ports: | |
751 | ;0 - Con status. Returns 0xFF if the UART has a byte, 0 otherwise. | |
752 | ;1 - Console input, aka UDR. | |
753 | ;2 - Console output | |
754 | ;15 - Disk select | |
755 | ;16,17 - Track select | |
756 | ;18 - Sector select | |
757 | ;20 - Write addr l | |
758 | ;21 - Write addr h | |
759 | ;22 - Trigger - write to read, to write a sector using the above info; | |
760 | ; , write to allocated/dirctory/unallocated | |
761 | ||
762 | .equ READ_FUNC = 7 | |
763 | .equ WRITE_FUNC = 6 | |
764 | .equ BOOT_FUNC = 5 | |
765 | .equ HOME_FUNC = 4 | |
766 | ||
767 | ||
768 | ||
769 | ;***************************************************** | |
770 | ;* CP/M to host disk constants * | |
771 | ;***************************************************** | |
772 | .equ MAXDISKS = 4 ;Max number of Disks (partitions) | |
773 | .equ blksize = 1024 ;CP/M allocation size | |
774 | .equ hostsize = 512 ;host disk sector size | |
775 | ; .equ hostspt = 20 ;host disk sectors/trk | |
776 | .equ hostblk = hostsize/128 ;CP/M sects/host buff | |
777 | ; .equ CPMSPT = hostblk*hostspt;CP/M sectors/track | |
778 | .equ CPMSPT = 26 ; | |
779 | .equ SECMSK = hostblk-1 ;sector mask | |
780 | .equ SECSHF = log2(hostblk) ;sector shift | |
781 | ||
782 | ;***************************************************** | |
783 | ;* BDOS constants on entry to write * | |
784 | ;***************************************************** | |
785 | .equ WRALL = 0 ;write to allocated | |
786 | .equ WRDIR = 1 ;write to directory | |
787 | .equ WRUAL = 2 ;write to unallocated | |
788 | .equ WRTMSK= 3 ;write type mask | |
789 | ||
790 | ||
791 | .dseg | |
792 | ndisks: .byte 1 ;Number of CP/M disks | |
793 | ||
794 | seekdsk: .byte 1 ;seek disk number | |
795 | seektrk: .byte 2 ;seek track number | |
796 | seeksec: .byte 1 ;seek sector number | |
797 | ||
798 | hostdsk: .byte 1 ;host disk number | |
799 | hostlba: .byte 3 ;host sector number (relative to partition start) | |
800 | hostdstart: .byte 4*MAXDISKS ; host disks start sector (partition) | |
801 | ||
802 | unacnt: .byte 1 ;unalloc rec cnt | |
803 | unadsk: .byte 1 ;last unalloc disk | |
804 | unatrk: .byte 2 ;last unalloc track | |
805 | unasec: .byte 1 ;last unalloc sector | |
806 | ||
807 | erflag: .byte 1 ;error reporting | |
808 | wrtype: .byte 1 ;write operation type | |
809 | dmaadr: .byte 2 ;last dma address | |
810 | hostbuf: .byte hostsize;host buffer (from/to SD-card) | |
811 | ||
812 | ||
813 | .cseg | |
814 | ||
815 | ;Called with port in temp2. Should return value in temp. | |
816 | portRead: | |
817 | cpi temp2,0 | |
818 | breq conStatus | |
819 | cpi temp2,1 | |
820 | breq conInp | |
821 | ||
822 | cpi temp2,15 | |
823 | breq dskDiskCheck | |
824 | ||
825 | cpi temp2,TIMER_MSECS | |
826 | brlo pr_noclock | |
827 | cpi temp2,TIMER_MSECS+6 | |
828 | brsh pr_noclock | |
829 | rjmp clockget | |
830 | ||
831 | pr_noclock: | |
832 | ldi temp,0xFF | |
833 | ret | |
834 | ||
835 | ;Called with port in temp2 and value in temp. | |
836 | portWrite: | |
837 | cpi temp2,0 | |
838 | breq dbgOut | |
839 | cpi temp2,2 | |
840 | breq conOut | |
841 | ||
842 | cpi temp2,15 | |
843 | breq dskDiskSel | |
844 | cpi temp2,16 | |
845 | breq dskTrackSel_l | |
846 | cpi temp2,17 | |
847 | breq dskTrackSel_h | |
848 | cpi temp2,18 | |
849 | breq dskSecSel | |
850 | cpi temp2,20 | |
851 | breq dskDmaL | |
852 | cpi temp2,21 | |
853 | breq dskDmaH | |
854 | ||
855 | cpi temp2,22 | |
856 | breq dskDoIt | |
857 | ||
858 | cpi temp2,TIMERPORT | |
859 | brlo pw_noclock | |
860 | cpi temp2,TIMER_MSECS+6 | |
861 | brsh pw_noclock | |
862 | rjmp clockput | |
863 | ||
864 | pw_noclock: | |
865 | ret | |
866 | ||
867 | ||
868 | conStatus: | |
869 | ||
870 | lds temp,rxcount | |
871 | tst temp | |
872 | breq PC+2 | |
873 | ldi temp,0xff | |
874 | ret | |
875 | ||
876 | conInp: | |
877 | rjmp uartGetc | |
878 | ||
879 | dbgOut: | |
880 | rcall printstr | |
881 | .db "Debug: ",0 | |
882 | rcall printhex | |
883 | rcall printstr | |
884 | .db 13,0 | |
885 | ret | |
886 | ||
887 | conOut: | |
888 | rjmp uartputc | |
889 | ||
890 | ||
891 | dskDiskCheck: | |
892 | lds temp,seekdsk | |
893 | lds temp2,ndisks ;check if selected disk # is less then # of disks | |
894 | cp temp,temp2 | |
895 | ldi temp,0 | |
896 | brlt PC+2 | |
897 | ldi temp,0xff ;error return | |
898 | ret | |
899 | ||
900 | dskDiskSel: | |
901 | sts seekdsk,temp | |
902 | ret | |
903 | ||
904 | dskTrackSel_l: | |
905 | sts seektrk,temp | |
906 | sts seektrk+1,_0 | |
907 | ret | |
908 | ||
909 | dskTrackSel_h: | |
910 | sts seektrk+1,temp | |
911 | ret | |
912 | ||
913 | dskSecSel: | |
914 | sts seeksec,temp | |
915 | ret | |
916 | ||
917 | dskDmal: | |
918 | sts dmaadr,temp | |
919 | ret | |
920 | ||
921 | dskDmah: | |
922 | sts dmaadr+1,temp | |
923 | ret | |
924 | ||
925 | dskDoIt: | |
926 | ;See what has to be done. | |
927 | sbrc temp,READ_FUNC | |
928 | rjmp dsk_read | |
929 | sbrc temp,WRITE_FUNC | |
930 | rjmp dsk_write | |
931 | sbrc temp,HOME_FUNC | |
932 | rjmp dsk_home | |
933 | sbrc temp,BOOT_FUNC | |
934 | rjmp dsk_boot | |
935 | ||
936 | rcall printstr | |
937 | .db "DISK I/O: Invalid Function code: ",0 | |
938 | rcall printhex | |
939 | rjmp haltinv | |
940 | ||
941 | dsk_boot: | |
942 | cbi flags,hostact ;host buffer inactive | |
943 | sts unacnt,_0 ;clear unalloc count | |
944 | ret | |
945 | ||
946 | dsk_home: | |
947 | sbis flags,hostwrt ;check for pending write | |
948 | cbi flags,hostact ;clear host active flag | |
949 | ret | |
950 | ||
951 | ||
952 | dsk_read: | |
953 | ||
954 | .if 0 | |
955 | rcall timer_quit | |
956 | rcall printstr | |
957 | .db " In",0 | |
958 | .endif | |
959 | ||
960 | .if DISK_DEBUG | |
961 | push temp | |
962 | rcall printstr | |
963 | .db 13,0 | |
964 | rcall printstr | |
965 | .db "Disk read: track ",0 | |
966 | lds temp,seektrk+1 | |
967 | rcall printhex | |
968 | lds temp,seektrk | |
969 | rcall printhex | |
970 | rcall printstr | |
971 | .db " sector ",0,0 | |
972 | lds temp,seeksec | |
973 | rcall printhex | |
974 | rcall printstr | |
975 | .db " dma-addr ",0,0 | |
976 | lds temp,dmaadr+1 | |
977 | rcall printhex | |
978 | lds temp,dmaadr | |
979 | rcall printhex | |
980 | ; rcall printstr | |
981 | ; .db ".",13,0,0 | |
982 | pop temp | |
983 | .endif | |
984 | sts unacnt,_0 | |
985 | sbi flags,readop ;read operation | |
986 | sbi flags,rsflag ;must read data | |
987 | ldi temp,WRUAL ;write type | |
988 | sts wrtype,temp ;treat as unalloc | |
989 | rjmp dsk_rwoper ;to perform the read | |
990 | ||
991 | ||
992 | dsk_write: | |
993 | ;write the selected CP/M sector | |
994 | ||
995 | andi temp,WRTMSK | |
996 | sts wrtype,temp ;save write type | |
997 | cbi flags,readop ;not a read operation | |
998 | ||
999 | .if DISK_DEBUG | |
1000 | push temp | |
1001 | rcall printstr | |
1002 | .db 13,0 | |
1003 | rcall printstr | |
1004 | .db "Disk write: track ",0,0 | |
1005 | lds temp,seektrk+1 | |
1006 | rcall printhex | |
1007 | lds temp,seektrk | |
1008 | rcall printhex | |
1009 | rcall printstr | |
1010 | .db " sector ",0,0 | |
1011 | lds temp,seeksec | |
1012 | rcall printhex | |
1013 | rcall printstr | |
1014 | .db " dma-addr ",0,0 | |
1015 | lds temp,dmaadr+1 | |
1016 | rcall printhex | |
1017 | lds temp,dmaadr | |
1018 | rcall printhex | |
1019 | rcall printstr | |
1020 | .db " wrtype ",0,0 | |
1021 | lds temp,wrtype | |
1022 | rcall printhex | |
1023 | ; rcall printstr | |
1024 | ; .db ".",13,0,0 | |
1025 | pop temp | |
1026 | .endif | |
1027 | ||
1028 | cpi temp,WRUAL ;write unallocated? | |
1029 | brne dsk_chkuna ;check for unalloc | |
1030 | ||
1031 | ; write to unallocated, set parameters | |
1032 | ldi temp,blksize/128 ;next unalloc recs | |
1033 | sts unacnt,temp | |
1034 | lds temp,seekdsk ;disk to seek | |
1035 | sts unadsk,temp ;unadsk = sekdsk | |
1036 | lds temp,seektrk | |
1037 | sts unatrk,temp ;unatrk = sectrk | |
1038 | lds temp,seektrk+1 | |
1039 | sts unatrk+1,temp ;unatrk = sectrk | |
1040 | lds temp,seeksec | |
1041 | sts unasec,temp ;unasec = seksec | |
1042 | ; | |
1043 | dsk_chkuna: | |
1044 | ;check for write to unallocated sector | |
1045 | lds temp,unacnt ;any unalloc remain? | |
1046 | tst temp | |
1047 | breq dsk_alloc ;skip if not | |
1048 | ||
1049 | ; more unallocated records remain | |
1050 | dec temp ;unacnt = unacnt-1 | |
1051 | sts unacnt,temp | |
1052 | lds temp,seekdsk ;same disk? | |
1053 | lds temp2,unadsk | |
1054 | cp temp,temp2 ;seekdsk = unadsk? | |
1055 | brne dsk_alloc ;skip if not | |
1056 | ||
1057 | ; disks are the same | |
1058 | lds temp,unatrk | |
1059 | lds temp2,unatrk+1 | |
1060 | lds temp3,seektrk | |
1061 | lds temp4,seektrk+1 | |
1062 | cp temp,temp3 ;seektrk = unatrk? | |
1063 | cpc temp2,temp4 | |
1064 | brne dsk_alloc ;skip if not | |
1065 | ||
1066 | ; tracks are the same | |
1067 | lds temp,seeksec ;same sector? | |
1068 | lds temp2,unasec | |
1069 | cp temp,temp2 ;seeksec = unasec? | |
1070 | brne dsk_alloc ;skip if not | |
1071 | ||
1072 | ; match, move to next sector for future ref | |
1073 | inc temp2 ;unasec = unasec+1 | |
1074 | sts unasec,temp2 | |
1075 | cpi temp2,CPMSPT ;end of track? (count CP/M sectors) | |
1076 | brlo dsk_noovf ;skip if no overflow | |
1077 | ||
1078 | ; overflow to next track | |
1079 | sts unasec,_0 ;unasec = 0 | |
1080 | lds temp,unatrk | |
1081 | lds temp2,unatrk+1 | |
1082 | subi temp, low(-1) ;unatrk = unatrk+1 | |
1083 | sbci temp2,high(-1) | |
1084 | sts unatrk,temp | |
1085 | sts unatrk+1,temp2 | |
1086 | ; | |
1087 | dsk_noovf: | |
1088 | cbi flags,rsflag ;rsflag = 0 | |
1089 | rjmp dsk_rwoper ;to perform the write | |
1090 | ; | |
1091 | dsk_alloc: | |
1092 | ;not an unallocated record, requires pre-read | |
1093 | sts unacnt,_0 ;unacnt = 0 | |
1094 | sbi flags,rsflag ;rsflag = 1 | |
1095 | ||
1096 | ;***************************************************** | |
1097 | ;* Common code for READ and WRITE follows * | |
1098 | ;***************************************************** | |
1099 | ||
1100 | dsk_rwoper: | |
1101 | ;enter here to perform the read/write | |
1102 | sts erflag,_0 ;no errors (yet) | |
1103 | ||
1104 | ;Convert track/sector to an LBA address (in 128byte blocks) | |
1105 | ||
1106 | lds xl,seeksec ; | |
1107 | ldi xh,0 ; | |
1108 | ldi yl,0 ; | |
1109 | lds temp3,seektrk ; | |
1110 | lds temp4,seektrk+1 ; | |
1111 | ldi temp,CPMSPT ; | |
1112 | mul temp3,temp ; | |
1113 | add xl,r0 ; | |
1114 | adc xh,r1 ; | |
1115 | mul temp4,temp ; | |
1116 | add xh,r0 ;xh:xl := sec + trk * SectorsPerTrack | |
1117 | adc yl,r1 ; | |
1118 | clr _0 | |
1119 | ||
1120 | mov temp,xl | |
1121 | andi temp,SECMSK ;mask buffer number | |
1122 | push temp ;save for later | |
1123 | ||
1124 | ;Convert from CP/M LBA blocks to host LBA blocks | |
1125 | ldi temp,SECSHF | |
1126 | dsk_sh1: | |
1127 | lsr xh | |
1128 | ror xl | |
1129 | ror yl | |
1130 | dec temp | |
1131 | brne dsk_sh1 | |
1132 | ;yl:xh:xl = host block to seek | |
1133 | ; active host sector? | |
1134 | sbis flags,hostact ;host active? | |
1135 | rjmp dsk_filhst ;fill host if not | |
1136 | ||
1137 | ; host buffer active, same as seek buffer? | |
1138 | lds temp,seekdsk | |
1139 | lds temp2,hostdsk ;same disk? | |
1140 | cp temp,temp2 ;seekdsk = hostdsk? | |
1141 | brne dsk_nomatch | |
1142 | ||
1143 | ; same disk, same block? | |
1144 | lds temp,hostlba | |
1145 | lds temp2,hostlba+1 | |
1146 | lds temp3,hostlba+2 | |
1147 | cp xl,temp | |
1148 | cpc xh,temp2 | |
1149 | cpc yl,temp3 | |
1150 | breq dsk_match | |
1151 | ; | |
1152 | dsk_nomatch: | |
1153 | ;proper disk, but not correct sector | |
1154 | sbic flags,hostwrt ;host written? | |
1155 | rcall dsk_writehost ;clear host buff | |
1156 | ||
1157 | dsk_filhst: | |
1158 | ;may have to fill the host buffer | |
1159 | lds temp,seekdsk | |
1160 | sts hostdsk,temp | |
1161 | sts hostlba,xl | |
1162 | sts hostlba+1,xh | |
1163 | sts hostlba+2,yl | |
1164 | ||
1165 | sbic flags,rsflag ;need to read? | |
1166 | rcall dsk_readhost ;yes, if 1 | |
1167 | cbi flags,hostwrt ;no pending write | |
1168 | ||
1169 | dsk_match: | |
1170 | sbi flags,hostact ;host buffer active now | |
1171 | ||
1172 | ;copy data to or from buffer | |
1173 | ldi zl,low(hostbuf) | |
1174 | ldi zh,high(hostbuf) | |
1175 | ldi temp,128 | |
1176 | pop temp2 ;get buffer number (which part of hostbuf) | |
1177 | mul temp2,temp | |
1178 | add zl,r0 ;offset in hostbuf | |
1179 | adc zh,r1 | |
1180 | .if DISK_DEBUG | |
1181 | push r0 | |
1182 | push r1 | |
1183 | clr _0 | |
1184 | rcall printstr | |
1185 | .db "; host buf adr: ",0,0 | |
1186 | pop temp | |
1187 | rcall printhex | |
1188 | pop temp | |
1189 | rcall printhex | |
1190 | .endif | |
1191 | clr _0 | |
1192 | ||
1193 | lds xl,dmaadr | |
1194 | lds xh,dmaadr+1 | |
1195 | ldi temp3,128 ;length of move | |
1196 | sbic flags,readop ;which way? | |
1197 | rjmp dsk_rmove ;skip if read | |
1198 | ||
1199 | ; mark write operation | |
1200 | sbi flags,hostwrt ;hostwrt = 1 | |
1201 | dsk_wmove: | |
1202 | rcall memReadByte | |
1203 | st z+,temp | |
1204 | adiw xl,1 | |
1205 | dec temp3 | |
1206 | brne dsk_wmove | |
1207 | rjmp dsk_rwmfin | |
1208 | ||
1209 | dsk_rmove: | |
1210 | ld temp,z+ | |
1211 | rcall memWriteByte | |
1212 | adiw xl,1 | |
1213 | dec temp3 | |
1214 | brne dsk_rmove | |
1215 | dsk_rwmfin: | |
1216 | ; data has been moved to/from host buffer | |
1217 | lds temp,wrtype ;write type | |
1218 | cpi temp,WRDIR ;to directory? | |
1219 | breq dsk_wdir | |
1220 | lds temp,erflag | |
1221 | .if 0 | |
1222 | rcall timer_quit | |
1223 | rcall printstr | |
1224 | .db " Out",0 | |
1225 | .endif | |
1226 | ret ;no further processing | |
1227 | dsk_wdir: | |
1228 | ; clear host buffer for directory write | |
1229 | lds temp,erflag | |
1230 | tst temp ;errors? | |
1231 | breq dsk_wdir1 | |
1232 | ret ;skip if so | |
1233 | dsk_wdir1: | |
1234 | rcall dsk_writehost ;clear host buff | |
1235 | cbi flags,hostwrt ;buffer written | |
1236 | lds temp,erflag | |
1237 | ret | |
1238 | ||
1239 | ||
1240 | ;***************************************************** | |
1241 | ;* WRITEhost performs the physical write to * | |
1242 | ;* the host disk, READhost reads the physical * | |
1243 | ;* disk. * | |
1244 | ;***************************************************** | |
1245 | ||
1246 | dsk_writehost: | |
1247 | ;hostdsk = host disk #, hostlba = host block #. | |
1248 | ;Write "hostsize" bytes from hostbuf and return | |
1249 | ;error flag in erflag. | |
1250 | ;Return erflag non-zero if error | |
1251 | ||
1252 | push yh | |
1253 | push yl | |
1254 | push xh | |
1255 | push xl | |
1256 | ldi zl,low(hostdstart) | |
1257 | ldi zh,high(hostdstart) | |
1258 | lds temp,hostdsk | |
1259 | lsl temp | |
1260 | lsl temp | |
1261 | add zl,temp | |
1262 | adc zh,_0 | |
1263 | ||
1264 | ldd xl,z+0 | |
1265 | ldd xh,z+1 | |
1266 | ldd yl,z+2 | |
1267 | ldd yh,z+3 | |
1268 | lds temp,hostlba | |
1269 | add xl,temp | |
1270 | lds temp,hostlba+1 | |
1271 | adc xh,temp | |
1272 | lds temp,hostlba+2 | |
1273 | adc zl,temp | |
1274 | adc zh,_0 | |
1275 | rcall mmcWriteSect | |
1276 | pop xl | |
1277 | pop xh | |
1278 | pop yl | |
1279 | pop yh | |
1280 | sts erflag,_0 | |
1281 | ret | |
1282 | ||
1283 | dsk_readhost: | |
1284 | ;hostdsk = host disk #, hostlba = host block #. | |
1285 | ;Read "hostsiz" bytes into hostbuf and return | |
1286 | ;error flag in erflag. | |
1287 | ||
1288 | push yh | |
1289 | push yl | |
1290 | push xh | |
1291 | push xl | |
1292 | ldi zl,low(hostdstart) | |
1293 | ldi zh,high(hostdstart) | |
1294 | lds temp,hostdsk | |
1295 | lsl temp | |
1296 | lsl temp | |
1297 | add zl,temp | |
1298 | adc zh,_0 | |
1299 | ||
1300 | ldd xl,z+0 | |
1301 | ldd xh,z+1 | |
1302 | ldd yl,z+2 | |
1303 | ldd yh,z+3 | |
1304 | lds temp,hostlba | |
1305 | add xl,temp | |
1306 | lds temp,hostlba+1 | |
1307 | adc xh,temp | |
1308 | lds temp,hostlba+2 | |
1309 | adc zl,temp | |
1310 | adc zh,_0 | |
1311 | rcall mmcReadSect | |
1312 | pop xl | |
1313 | pop xh | |
1314 | pop yl | |
1315 | pop yh | |
1316 | sts erflag,_0 | |
1317 | ret | |
1318 | ||
1319 | ||
1320 | ;*************************************************************************** | |
1321 | ||
1322 | ; ----------------- MMC/SD routines ------------------ | |
1323 | ||
1324 | mmcByteNoSend: | |
1325 | ldi temp,0xff | |
1326 | mmcByte: | |
1327 | ||
1328 | .if MMC_DEBUG | |
1329 | rcall printstr | |
1330 | .db "MMC: <--",0 | |
1331 | rcall printhex | |
1332 | .endif | |
1333 | ||
1334 | out SPDR,temp | |
1335 | mmcWrByteW: | |
1336 | in temp,SPSR | |
1337 | sbrs temp,7 | |
1338 | rjmp mmcWrByteW | |
1339 | in temp,SPDR | |
1340 | ||
1341 | .if MMC_DEBUG | |
1342 | rcall printstr | |
1343 | .db ", -->",0 | |
1344 | rcall printhex | |
1345 | rcall printstr | |
1346 | .db ".",13,0 | |
1347 | .endif | |
1348 | ret | |
1349 | ||
1350 | ||
1351 | ;Wait till the mmc answers with the response in temp2, or till a timeout happens. | |
1352 | mmcWaitResp: | |
1353 | ldi zl,0 | |
1354 | ldi zh,0 | |
1355 | mmcWaitResploop: | |
1356 | rcall mmcByteNoSend | |
1357 | cpi temp,0xff | |
1358 | brne mmcWaitResploopEnd | |
1359 | adiw zl,1 | |
1360 | cpi zh,255 | |
1361 | breq mmcWaitErr | |
1362 | rjmp mmcWaitResploop | |
1363 | mmcWaitResploopEnd: | |
1364 | ret | |
1365 | ||
1366 | ||
1367 | mmcWaitErr: | |
1368 | mov temp,temp2 | |
1369 | rcall printhex | |
1370 | rcall printstr | |
1371 | .db ": Error: MMC resp timeout!",13,0 | |
1372 | rjmp resetAVR | |
1373 | ||
1374 | mmcInit: | |
1375 | ldi temp,0x53 | |
1376 | out SPCR,temp | |
1377 | ||
1378 | ;Init start: send 80 clocks with cs disabled | |
1379 | sbi P_MMC_CS,mmc_cs | |
1380 | ||
1381 | ; ldi temp2,20 | |
1382 | ldi temp2,10 ; exactly 80 clocks | |
1383 | mmcInitLoop: | |
1384 | mov temp,temp2 | |
1385 | rcall mmcByte | |
1386 | dec temp2 | |
1387 | brne mmcInitLoop | |
1388 | ||
1389 | cbi P_MMC_CS,mmc_cs | |
1390 | rcall mmcByteNoSend | |
1391 | rcall mmcByteNoSend | |
1392 | rcall mmcByteNoSend | |
1393 | rcall mmcByteNoSend | |
1394 | rcall mmcByteNoSend | |
1395 | rcall mmcByteNoSend | |
1396 | sbi P_MMC_CS,mmc_cs | |
1397 | rcall mmcByteNoSend | |
1398 | rcall mmcByteNoSend | |
1399 | rcall mmcByteNoSend | |
1400 | rcall mmcByteNoSend | |
1401 | ||
1402 | ;Send init command | |
1403 | cbi P_MMC_CS,mmc_cs | |
1404 | ldi temp,0xff ;dummy | |
1405 | rcall mmcByte | |
1406 | ldi temp,0xff ;dummy | |
1407 | rcall mmcByte | |
1408 | ldi temp,0x40 ;cmd | |
1409 | rcall mmcByte | |
1410 | ldi temp,0 ;pxh | |
1411 | rcall mmcByte | |
1412 | ldi temp,0 ;pxl | |
1413 | rcall mmcByte | |
1414 | ldi temp,0 ;pyh | |
1415 | rcall mmcByte | |
1416 | ldi temp,0 ;pyl | |
1417 | rcall mmcByte | |
1418 | ldi temp,0x95 ;crc | |
1419 | rcall mmcByte | |
1420 | ldi temp,0xff ;return byte | |
1421 | rcall mmcByte | |
1422 | ||
1423 | ldi temp2,0 ;Error Code 0 | |
1424 | rcall mmcWaitResp ;Test on CMD0 is OK | |
1425 | ||
1426 | sbi P_MMC_CS,mmc_cs ;disable /CS | |
1427 | rcall mmcByteNoSend | |
1428 | ||
1429 | ||
1430 | ;Read OCR till card is ready | |
1431 | ldi temp2,20 ;repeat counter | |
1432 | mmcInitOcrLoop: | |
1433 | push temp2 | |
1434 | ||
1435 | cbi P_MMC_CS,mmc_cs ;enable /CS | |
1436 | ldi temp,0xff ;dummy | |
1437 | rcall mmcByte | |
1438 | ldi temp,0x41 ;cmd | |
1439 | rcall mmcByte | |
1440 | ldi temp,0 ;pxh | |
1441 | rcall mmcByte | |
1442 | ldi temp,0 ;pxl | |
1443 | rcall mmcByte | |
1444 | ldi temp,0 ;pyh | |
1445 | rcall mmcByte | |
1446 | ldi temp,0 ;pyl | |
1447 | rcall mmcByte | |
1448 | ; ldi temp,0x95 ;crc | |
1449 | ldi temp,0x01 ;crc | |
1450 | rcall mmcByte | |
1451 | rcall mmcByteNoSend | |
1452 | ||
1453 | ldi temp2,1 | |
1454 | rcall mmcWaitResp ;wait until mmc-card send a byte <> 0xFF | |
1455 | ;the first answer must be 0x01 (Idle-Mode) | |
1456 | cpi temp,0 | |
1457 | breq mmcInitOcrLoopDone ;second answer is 0x00 (Idle-Mode leave) CMD1 is OK | |
1458 | ||
1459 | sbi P_MMC_CS,mmc_cs ;disable /CS | |
1460 | ||
1461 | ; rcall mmcByteNoSend ;unnecessary | |
1462 | ||
1463 | ldi temp,10 | |
1464 | rcall delay_ms | |
1465 | ||
1466 | pop temp2 | |
1467 | dec temp2 | |
1468 | cpi temp2,0 | |
1469 | brne mmcInitOcrLoop ;repeat | |
1470 | ||
1471 | ldi temp2,4 | |
1472 | rjmp mmcWaitErr | |
1473 | ||
1474 | mmcInitOcrLoopDone: | |
1475 | pop temp2 | |
1476 | sbi P_MMC_CS,mmc_cs ;disable /CS | |
1477 | rcall mmcByteNoSend | |
1478 | ||
1479 | out SPCR,_0 | |
1480 | ret | |
1481 | ||
1482 | ||
1483 | ;Call this with yh:yl:xh:xl = sector number | |
1484 | ; | |
1485 | mmcReadSect: | |
1486 | ldi temp,0x50 | |
1487 | out SPCR,temp | |
1488 | ||
1489 | cbi P_MMC_CS,mmc_cs | |
1490 | rcall mmcByteNoSend | |
1491 | ldi temp,0x51 ;cmd (read sector) | |
1492 | rcall mmcByte | |
1493 | lsl xl ;convert to byte address (*512) | |
1494 | rol xh | |
1495 | rol yl | |
1496 | mov temp,yl | |
1497 | rcall mmcByte | |
1498 | mov temp,xh ;pxl | |
1499 | rcall mmcByte | |
1500 | mov temp,xl ;pyh | |
1501 | rcall mmcByte | |
1502 | ldi temp,0 ;pyl | |
1503 | rcall mmcByte | |
1504 | ldi temp,0x95 ;crc | |
1505 | rcall mmcByte | |
1506 | ldi temp,0xff ;return byte | |
1507 | rcall mmcByte | |
1508 | ||
1509 | ;resp | |
1510 | ldi temp2,2 | |
1511 | rcall mmcWaitResp | |
1512 | ||
1513 | ;data token | |
1514 | ldi temp2,3 | |
1515 | rcall mmcWaitResp | |
1516 | ||
1517 | ;Read sector to AVR RAM | |
1518 | ldi zl,low(hostbuf) | |
1519 | ldi zh,high(hostbuf) | |
1520 | mmcreadloop: | |
1521 | rcall mmcByteNoSend | |
1522 | st z+,temp | |
1523 | cpi zl,low(hostbuf+512) | |
1524 | brne mmcreadloop | |
1525 | cpi zh,high(hostbuf+512) | |
1526 | brne mmcreadloop | |
1527 | ||
1528 | ;CRC | |
1529 | rcall mmcByteNoSend | |
1530 | rcall mmcByteNoSend | |
1531 | ||
1532 | sbi P_MMC_CS,mmc_cs | |
1533 | rcall mmcByteNoSend | |
1534 | ||
1535 | out SPCR,_0 | |
1536 | ret | |
1537 | ||
1538 | ||
1539 | ;Call this with yh:yl:xh:xl = sector number | |
1540 | ; | |
1541 | mmcWriteSect: | |
1542 | ldi temp,0x50 | |
1543 | out SPCR,temp | |
1544 | ||
1545 | cbi P_MMC_CS,mmc_cs | |
1546 | rcall mmcByteNoSend | |
1547 | ||
1548 | ldi temp,0x58 ;cmd (write sector) | |
1549 | rcall mmcByte | |
1550 | lsl xl ;convert to byte address (*512) | |
1551 | rol xh | |
1552 | rol yl | |
1553 | mov temp,yl | |
1554 | rcall mmcByte | |
1555 | mov temp,xh ;pxl | |
1556 | rcall mmcByte | |
1557 | mov temp,xl ;pyh | |
1558 | rcall mmcByte | |
1559 | ldi temp,0 ;pyl | |
1560 | rcall mmcByte | |
1561 | ldi temp,0x95 ;crc | |
1562 | rcall mmcByte | |
1563 | ldi temp,0xff ;return byte | |
1564 | rcall mmcByte | |
1565 | ||
1566 | ;resp | |
1567 | ldi temp2,1 | |
1568 | rcall mmcWaitResp | |
1569 | ||
1570 | ;Send data token | |
1571 | ldi temp,0xfe | |
1572 | rcall mmcByte | |
1573 | ||
1574 | ;Write sector from AVR RAM | |
1575 | ldi zl,low(hostbuf) | |
1576 | ldi zh,high(hostbuf) | |
1577 | mmcwriteloop: | |
1578 | ld temp,z+ | |
1579 | rcall mmcByte | |
1580 | cpi zl,low(hostbuf+512) | |
1581 | brne mmcwriteloop | |
1582 | cpi zh,high(hostbuf+512) | |
1583 | brne mmcwriteloop | |
1584 | ||
1585 | ;CRC | |
1586 | rcall mmcByteNoSend | |
1587 | rcall mmcByteNoSend | |
1588 | ||
1589 | ;Status. Ignored for now. | |
1590 | rcall mmcByteNoSend | |
1591 | ||
1592 | ;Wait till the mmc has written everything | |
1593 | mmcwaitwritten: | |
1594 | rcall mmcByteNoSend | |
1595 | cpi temp,0xff | |
1596 | brne mmcwaitwritten | |
1597 | ||
1598 | sbi P_MMC_CS,mmc_cs | |
1599 | rcall mmcByteNoSend | |
1600 | ||
1601 | out SPCR,_0 | |
1602 | ret | |
1603 | ||
1604 | ||
1605 | ;Set up wdt to time out after 1 sec. | |
1606 | resetAVR: | |
1607 | cli | |
1608 | ldi temp,(1<<WDCE) | |
1609 | outm8 WDTCSR,temp | |
1610 | ldi temp,(1<<WDCE) | (1<<WDE) | (110<<WDP0) | |
1611 | outm8 WDTCSR,temp | |
1612 | resetwait: | |
1613 | rjmp resetwait | |
1614 | ||
1615 | ; ------------------ DRAM routines ------------- | |
1616 | ||
1617 | ; DRAM_SETADDR val, low_and_mask, low_or_mask, high_and_mask, high_or_mask | |
1618 | .macro DRAM_SETADDR | |
1619 | mov temp,@0 | |
1620 | .if low(@1) != 0xff | |
1621 | andi temp,@1 | |
1622 | .endif | |
1623 | .if low(@2) != 0 | |
1624 | ori temp, @2 | |
1625 | .endif | |
1626 | out P_AL,temp | |
1627 | ||
1628 | mov temp,@0 | |
1629 | .if low(@3) != 0xff | |
1630 | andi temp,@3 | |
1631 | .endif | |
1632 | ori temp, @4 | (1<<mmc_cs) | |
1633 | out P_AH,temp | |
1634 | .endm | |
1635 | ||
1636 | ;Loads the byte on address xh:xl into temp. | |
1637 | ;must not alter xh:xl | |
1638 | ||
1639 | dram_read: | |
1640 | cli | |
1641 | DRAM_SETADDR xh, ~0,(1<<ram_ras), ~(1<<ram_a8), (1<<ram_oe) | |
1642 | cbi P_RAS,ram_ras | |
1643 | DRAM_SETADDR xl, ~(1<<ram_ras),0, ~((1<<ram_oe)), (1<<ram_a8) | |
1644 | cbi P_CAS,ram_cas | |
1645 | cbi P_A8,ram_a8 | |
1646 | dram_wait DRAM_WAITSTATES ; | |
1647 | in temp,P_DQ-2 ; PIN | |
1648 | sbi P_CAS,ram_cas | |
1649 | ||
1650 | cbi P_CAS,ram_cas | |
1651 | andi temp,0x0f | |
1652 | swap temp | |
1653 | dram_wait DRAM_WAITSTATES ; | |
1654 | in temp2,P_DQ-2 ; PIN | |
1655 | andi temp2,0x0f | |
1656 | or temp,temp2 | |
1657 | ||
1658 | sbi P_OE,ram_oe | |
1659 | sbi P_CAS,ram_cas | |
1660 | sbi P_RAS,ram_ras | |
1661 | sei | |
1662 | ret | |
1663 | ||
1664 | #if DRAM_WORD_ACCESS | |
1665 | dram_read_w: | |
1666 | cpi xl,255 | |
1667 | brne dram_read_w1 | |
1668 | ||
1669 | rcall dram_read | |
1670 | push temp | |
1671 | adiw xl,1 | |
1672 | rcall dram_read | |
1673 | mov temp2,temp | |
1674 | pop temp | |
1675 | ret | |
1676 | ||
1677 | dram_read_w1: | |
1678 | cli | |
1679 | DRAM_SETADDR xh, ~0,(1<<ram_ras), ~(1<<ram_a8),(1<<ram_oe) | |
1680 | cbi P_RAS,ram_ras | |
1681 | DRAM_SETADDR xl, ~(1<<ram_ras),0, ~((1<<ram_oe)), (1<<ram_a8) | |
1682 | cbi P_CAS,ram_cas | |
1683 | cbi P_A8,ram_a8 | |
1684 | nop | |
1685 | in temp,P_DQ-2 ; PIN | |
1686 | sbi P_CAS,ram_cas | |
1687 | cbi P_CAS,ram_cas | |
1688 | andi temp,0x0f | |
1689 | swap temp | |
1690 | nop | |
1691 | in temp2,P_DQ-2 ; PIN | |
1692 | sbi P_CAS,ram_cas | |
1693 | andi temp2,0x0f | |
1694 | or temp,temp2 | |
1695 | ||
1696 | ; push temp | |
1697 | mov _wl,temp | |
1698 | inc xl | |
1699 | DRAM_SETADDR xl, ~(1<<ram_ras),0, ~((1<<ram_oe)), (1<<ram_a8) | |
1700 | cbi P_CAS,ram_cas | |
1701 | cbi P_A8,ram_a8 | |
1702 | nop | |
1703 | in temp,P_DQ-2 ; PIN | |
1704 | sbi P_CAS,ram_cas | |
1705 | cbi P_CAS,ram_cas | |
1706 | andi temp,0x0f | |
1707 | swap temp | |
1708 | nop | |
1709 | in temp2,P_DQ-2 ; PIN | |
1710 | sbi P_CAS,ram_cas | |
1711 | andi temp2,0x0f | |
1712 | or temp2,temp | |
1713 | ; pop temp | |
1714 | mov temp,_wl | |
1715 | ||
1716 | sbi P_OE,ram_oe | |
1717 | sbi P_RAS,ram_ras | |
1718 | sei | |
1719 | ret | |
1720 | #endif | |
1721 | ||
1722 | ;Writes the byte in temp to xh:xl | |
1723 | ;must not alter xh:xl | |
1724 | ||
1725 | dram_write: | |
1726 | cli | |
1727 | ldi temp2,RAM_DQ_MASK | (1<<ram_w) | (1<<ram_cas) | |
1728 | out DDRC,temp2 | |
1729 | ||
1730 | mov temp2,temp | |
1731 | andi temp,RAM_DQ_MASK & ~(1<<ram_w) | |
1732 | ori temp,(1<<ram_cas) | |
1733 | out PORTC,temp | |
1734 | DRAM_SETADDR xh, ~0,(1<<ram_ras), ~(1<<ram_a8),(1<<ram_oe) | |
1735 | cbi P_RAS,ram_ras | |
1736 | DRAM_SETADDR xl, ~(1<<ram_ras),0, ~((1<<ram_a8)),(1<<ram_oe) | |
1737 | cbi PORTC,ram_cas | |
1738 | sbi PORTC,ram_cas | |
1739 | ||
1740 | sbi PORTD,ram_a8 | |
1741 | swap temp2 | |
1742 | ||
1743 | andi temp2,RAM_DQ_MASK & ~(1<<ram_w) | |
1744 | ori temp2,(1<<ram_cas) | |
1745 | out PORTC,temp2 | |
1746 | ||
1747 | cbi PORTC,ram_cas | |
1748 | sbi P_RAS,ram_ras | |
1749 | ||
1750 | ldi temp,~RAM_DQ_MASK | (1<<ram_w) | (1<<ram_cas) | |
1751 | out DDRC,temp | |
1752 | out PORTC,temp | |
1753 | sei | |
1754 | ret | |
1755 | ||
1756 | #if DRAM_WORD_ACCESS | |
1757 | dram_write_w: | |
1758 | cpi xl,255 | |
1759 | brne dram_write_w1 | |
1760 | ||
1761 | push temp2 | |
1762 | rcall dram_write | |
1763 | pop temp | |
1764 | adiw xl,1 | |
1765 | rcall dram_write | |
1766 | ret | |
1767 | ||
1768 | dram_write_w1: | |
1769 | cli | |
1770 | push temp2 | |
1771 | ldi temp2,RAM_DQ_MASK | (1<<ram_w) | (1<<ram_cas) | |
1772 | out DDRC,temp2 | |
1773 | ||
1774 | mov temp2,temp | |
1775 | andi temp,RAM_DQ_MASK & ~(1<<ram_w) | |
1776 | ori temp,(1<<ram_cas) | |
1777 | out PORTC,temp | |
1778 | ||
1779 | DRAM_SETADDR xh, ~0,(1<<ram_ras), ~(1<<ram_a8),(1<<ram_oe) | |
1780 | cbi P_RAS,ram_ras | |
1781 | DRAM_SETADDR xl, ~(1<<ram_ras),0, ~((1<<ram_a8)),(1<<ram_oe) | |
1782 | cbi PORTC,ram_cas | |
1783 | sbi PORTC,ram_cas | |
1784 | ||
1785 | sbi PORTD,ram_a8 | |
1786 | swap temp2 | |
1787 | ||
1788 | andi temp2,RAM_DQ_MASK & ~(1<<ram_w) | |
1789 | ori temp2,(1<<ram_cas) | |
1790 | out PORTC,temp2 | |
1791 | ||
1792 | cbi PORTC,ram_cas | |
1793 | sbi PORTC,ram_cas | |
1794 | ||
1795 | pop temp | |
1796 | inc xl | |
1797 | mov temp2,temp | |
1798 | andi temp,RAM_DQ_MASK & ~(1<<ram_w) | |
1799 | ori temp,(1<<ram_cas) | |
1800 | out PORTC,temp | |
1801 | ||
1802 | DRAM_SETADDR xl, ~(1<<ram_ras),0, ~((1<<ram_a8)),(1<<ram_oe) | |
1803 | cbi PORTC,ram_cas | |
1804 | sbi PORTC,ram_cas | |
1805 | ||
1806 | sbi PORTD,ram_a8 | |
1807 | swap temp2 | |
1808 | ||
1809 | andi temp2,RAM_DQ_MASK & ~(1<<ram_w) | |
1810 | ori temp2,(1<<ram_cas) | |
1811 | out PORTC,temp2 | |
1812 | cbi PORTC,ram_cas | |
1813 | ||
1814 | sbi P_RAS,ram_ras | |
1815 | ||
1816 | ldi temp,~RAM_DQ_MASK | (1<<ram_w) | (1<<ram_cas) | |
1817 | out DDRC,temp | |
1818 | out PORTC,temp | |
1819 | sei | |
1820 | ret | |
1821 | #endif | |
1822 | ||
1823 | ; **************************************************************************** | |
1824 | ||
1825 | ; refresh interupt; exec 2 cbr cycles | |
1826 | refrint: | |
1827 | ;4 CAS RAS | |
1828 | cbi P_CAS,ram_cas ;2 1| 1| | |
1829 | ; 1| 1| | |
1830 | cbi P_RAS,ram_ras ;2 |0 1| | |
1831 | ; |0 1| | |
1832 | nop ;1 |0 |0 | |
1833 | ; nop ;1 |0 |0 | |
1834 | sbi P_RAS,ram_ras ;2 |0 |0 | |
1835 | ; |0 |0 | |
1836 | dram_wait DRAM_WAITSTATES-1 ; | |
1837 | ; nop ;1 |0 |0 | |
1838 | cbi P_RAS,ram_ras ;2 |0 1| | |
1839 | ; |0 1| | |
1840 | sbi P_CAS,ram_cas ;2 |0 |0 | |
1841 | ; |0 |0 | |
1842 | sbi P_RAS,ram_ras ;2 1| |0 | |
1843 | ; 1| 1| | |
1844 | reti ;4 --> 21 cycles | |
1845 | ||
1846 | ||
1847 | ; ------------- system timer 1ms --------------- | |
1848 | .dseg | |
1849 | ||
1850 | delay_timer: | |
1851 | .byte 1 | |
1852 | timer_base: | |
1853 | timer_ms: | |
1854 | .byte 2 | |
1855 | timer_s: | |
1856 | .byte 4 | |
1857 | ; don't change order here, clock put/get depends on it. | |
1858 | cntms_out: ; register for ms | |
1859 | .byte 2 | |
1860 | utime_io: ; register for uptime. | |
1861 | .byte 4 | |
1862 | cnt_1ms: | |
1863 | .byte 2 | |
1864 | uptime: | |
1865 | .byte 4 | |
1866 | timer_top: | |
1867 | .equ timer_size = timer_top - timer_base | |
1868 | ||
1869 | .equ clkofs = cnt_1ms-cntms_out | |
1870 | .equ timerofs = cnt_1ms-timer_ms | |
1871 | ||
1872 | .cseg | |
1873 | sysclockint: | |
1874 | push zl | |
1875 | in zl,SREG | |
1876 | push zl | |
1877 | push zh | |
1878 | ||
1879 | lds zl,delay_timer | |
1880 | subi zl,1 | |
1881 | brcs syscl1 | |
1882 | sts delay_timer,zl | |
1883 | syscl1: | |
1884 | lds zl,cnt_1ms | |
1885 | lds zh,cnt_1ms+1 | |
1886 | adiw z,1 | |
1887 | ||
1888 | sts cnt_1ms,zl | |
1889 | sts cnt_1ms+1,zh | |
1890 | cpi zl,low(1000) | |
1891 | ldi zl,high(1000) ;doesn't change flags | |
1892 | cpc zh,zl | |
1893 | brlo syscl_end | |
1894 | ||
1895 | sts cnt_1ms,_0 | |
1896 | sts cnt_1ms+1,_0 | |
1897 | ||
1898 | lds zl,uptime+0 | |
1899 | inc zl | |
1900 | sts uptime+0,zl | |
1901 | brne syscl_end | |
1902 | lds zl,uptime+1 | |
1903 | inc zl | |
1904 | sts uptime+1,zl | |
1905 | brne syscl_end | |
1906 | lds zl,uptime+2 | |
1907 | inc zl | |
1908 | sts uptime+2,zl | |
1909 | brne syscl_end | |
1910 | lds zl,uptime+3 | |
1911 | inc zl | |
1912 | sts uptime+3,zl | |
1913 | ||
1914 | syscl_end: | |
1915 | pop zh | |
1916 | pop zl | |
1917 | out SREG,zl | |
1918 | pop zl | |
1919 | reti | |
1920 | ||
1921 | ; wait for temp ms | |
1922 | ||
1923 | delay_ms: | |
1924 | sts delay_timer,temp | |
1925 | dly_loop: | |
1926 | lds temp,delay_timer | |
1927 | cpi temp,0 | |
1928 | brne dly_loop | |
1929 | ret | |
1930 | ||
1931 | ; | |
1932 | ||
1933 | clockget: | |
1934 | ldi temp,0xFF | |
1935 | subi temp2,TIMER_MSECS | |
1936 | brcs clkget_end ;Port number in range? | |
1937 | ldi zl,low(cntms_out) | |
1938 | ldi zh,high(cntms_out) | |
1939 | breq clkget_copy ;lowest byte requestet, latch clock | |
1940 | cpi temp2,6 | |
1941 | brsh clkget_end ;Port number to high? | |
1942 | ||
1943 | add zl,temp2 | |
1944 | brcc PC+2 | |
1945 | inc zh | |
1946 | ld temp,z | |
1947 | clkget_end: | |
1948 | ret | |
1949 | ||
1950 | ||
1951 | ||
1952 | clkget_copy: | |
1953 | ldi temp2,6 | |
1954 | cli | |
1955 | clkget_l: | |
1956 | ldd temp,z+clkofs | |
1957 | st z+,temp | |
1958 | dec temp2 | |
1959 | brne clkget_l | |
1960 | sei | |
1961 | lds temp,cntms_out | |
1962 | ;req. byte in temp | |
1963 | ret | |
1964 | ||
1965 | clockput: | |
1966 | subi temp2,TIMERPORT | |
1967 | brcs clkput_end ;Port number in range? | |
1968 | brne clkput_1 | |
1969 | ||
1970 | ; clock control | |
1971 | ||
1972 | cpi temp,starttimercmd | |
1973 | breq timer_start | |
1974 | cpi temp,quitTimerCmd | |
1975 | breq timer_quit | |
1976 | cpi temp,printTimerCmd | |
1977 | breq timer_print | |
1978 | cpi temp,uptimeCmd | |
1979 | brne cp_ex | |
1980 | rjmp uptime_print | |
1981 | cp_ex: | |
1982 | ret | |
1983 | ||
1984 | timer_quit: | |
1985 | rcall timer_print | |
1986 | rjmp timer_start | |
1987 | ||
1988 | clkput_1: | |
1989 | dec temp2 | |
1990 | ldi zl,low(cntms_out) | |
1991 | ldi zh,high(cntms_out) | |
1992 | breq clkput_copy ;lowest byte requestet, latch clock | |
1993 | cpi temp2,6 | |
1994 | brsh clkput_end ;Port number to high? | |
1995 | ||
1996 | add zl,temp2 | |
1997 | brcc PC+2 | |
1998 | inc zh | |
1999 | st z,temp | |
2000 | clkput_end: | |
2001 | ret | |
2002 | ||
2003 | clkput_copy: | |
2004 | st z,temp | |
2005 | adiw z,5 | |
2006 | ldi temp2,6 | |
2007 | cli | |
2008 | clkput_l: | |
2009 | ldd temp,z+clkofs | |
2010 | st z+,temp | |
2011 | dec temp2 | |
2012 | brne clkput_l | |
2013 | sei | |
2014 | ret | |
2015 | ||
2016 | ; start/reset timer | |
2017 | ; | |
2018 | timer_start: | |
2019 | ldi zl,low(timer_ms) | |
2020 | ldi zh,high(timer_ms) | |
2021 | ldi temp2,6 | |
2022 | cli | |
2023 | ts_loop: | |
2024 | ldd temp,z+timerofs | |
2025 | st z+,temp | |
2026 | dec temp2 | |
2027 | brne ts_loop | |
2028 | sei | |
2029 | ret | |
2030 | ||
2031 | ||
2032 | ; print timer | |
2033 | ; | |
2034 | ||
2035 | timer_print: | |
2036 | push yh | |
2037 | push yl | |
2038 | ldi zl,low(timer_ms) | |
2039 | ldi zh,high(timer_ms) | |
2040 | ||
2041 | ; put ms on stack (16 bit) | |
2042 | ||
2043 | cli | |
2044 | ldd yl,z+timerofs | |
2045 | ld temp2,z+ | |
2046 | sub yl,temp2 | |
2047 | ldd yh,z+timerofs | |
2048 | ld temp2,z+ | |
2049 | sbc yh,temp2 | |
2050 | brsh tp_s | |
2051 | ||
2052 | subi yl,low(-1000) | |
2053 | sbci yh,high(-1000) | |
2054 | sec | |
2055 | tp_s: | |
2056 | push yh | |
2057 | push yl | |
2058 | ||
2059 | ldd temp,z+timerofs | |
2060 | ld yl,z+ | |
2061 | sbc temp,yl | |
2062 | ||
2063 | ldd temp2,z+timerofs | |
2064 | ld yh,z+ | |
2065 | sbc temp2,yh | |
2066 | ||
2067 | ldd temp3,z+timerofs | |
2068 | ld yl,z+ | |
2069 | sbc temp3,yl | |
2070 | ||
2071 | sei | |
2072 | ldd temp4,z+timerofs | |
2073 | ld yh,z+ | |
2074 | sbc temp4,yh | |
2075 | ||
2076 | rcall printstr | |
2077 | .db 13,"Timer running. Elapsed: ",0 | |
2078 | rcall print_ultoa | |
2079 | ||
2080 | rcall printstr | |
2081 | .db ".",0 | |
2082 | pop temp | |
2083 | pop temp2 | |
2084 | ldi temp3,0 | |
2085 | ldi temp4,0 | |
2086 | rcall print_ultoa | |
2087 | rcall printstr | |
2088 | .db "s.",0,0 | |
2089 | ||
2090 | pop yl | |
2091 | pop yh | |
2092 | ret | |
2093 | ||
2094 | uptime_print: | |
2095 | ||
2096 | ldi zl,low(cnt_1ms) | |
2097 | ldi zh,high(cnt_1ms) | |
2098 | ||
2099 | cli | |
2100 | ld temp,z+ | |
2101 | push temp | |
2102 | ld temp,z+ | |
2103 | push temp | |
2104 | ||
2105 | ld temp,z+ | |
2106 | ld temp2,z+ | |
2107 | ld temp3,z+ | |
2108 | sei | |
2109 | ld temp4,z+ | |
2110 | ||
2111 | rcall printstr | |
2112 | .db 13,"Uptime: ",0 | |
2113 | ||
2114 | rcall print_ultoa | |
2115 | rcall printstr | |
2116 | .db ",",0 | |
2117 | ||
2118 | ldi temp3,0 | |
2119 | ldi temp4,0 | |
2120 | pop temp2 | |
2121 | pop temp | |
2122 | rcall print_ultoa | |
2123 | rcall printstr | |
2124 | .db "s.",0,0 | |
2125 | ||
2126 | ret | |
2127 | ||
2128 | ||
2129 | ||
2130 | ; --------------- Debugging stuff --------------- | |
2131 | ||
2132 | ;Print a unsigned lonng value to the uart | |
2133 | ; temp4:temp3:temp2:temp = value | |
2134 | ||
2135 | print_ultoa: | |
2136 | push yh | |
2137 | push yl | |
2138 | push z_flags | |
2139 | ||
2140 | clr yl ;yl = stack level | |
2141 | ||
2142 | ultoa1: ldi z_flags, 32 ;yh = temp4:temp % 10 | |
2143 | clr yh ;temp4:temp /= 10 | |
2144 | ultoa2: lsl temp | |
2145 | rol temp2 | |
2146 | rol temp3 | |
2147 | rol temp4 | |
2148 | rol yh | |
2149 | cpi yh,10 | |
2150 | brcs ultoa3 | |
2151 | subi yh,10 | |
2152 | inc temp | |
2153 | ultoa3: dec z_flags | |
2154 | brne ultoa2 | |
2155 | cpi yh, 10 ;yh is a numeral digit '0'-'9' | |
2156 | subi yh, -'0' | |
2157 | push yh ;Stack it | |
2158 | inc yl | |
2159 | cp temp,_0 ;Repeat until temp4:temp gets zero | |
2160 | cpc temp2,_0 | |
2161 | cpc temp3,_0 | |
2162 | cpc temp4,_0 | |
2163 | brne ultoa1 | |
2164 | ||
2165 | ldi temp, '0' | |
2166 | ultoa5: cpi yl,3 ; at least 3 digits (ms) | |
2167 | brge ultoa6 | |
2168 | push temp | |
2169 | inc yl | |
2170 | rjmp ultoa5 | |
2171 | ||
2172 | ultoa6: pop temp ;Flush stacked digits | |
2173 | rcall uartputc | |
2174 | dec yl | |
2175 | brne ultoa6 | |
2176 | ||
2177 | pop z_flags | |
2178 | pop yl | |
2179 | pop yh | |
2180 | ret | |
2181 | ||
2182 | ||
2183 | ;Prints the lower nibble of temp in hex to the uart | |
2184 | printhexn: | |
2185 | push temp | |
2186 | andi temp,0xf | |
2187 | cpi temp,0xA | |
2188 | brlo printhexn_isno | |
2189 | subi temp,-('A'-10) | |
2190 | rcall uartputc | |
2191 | pop temp | |
2192 | ret | |
2193 | printhexn_isno: | |
2194 | subi temp,-'0' | |
2195 | rcall uartputc | |
2196 | pop temp | |
2197 | ret | |
2198 | ||
2199 | ;Prints temp in hex to the uart | |
2200 | printhex: | |
2201 | swap temp | |
2202 | rcall printhexn | |
2203 | swap temp | |
2204 | rcall printhexn | |
2205 | ret | |
2206 | ||
2207 | ;Prints the zero-terminated string following the call statement. | |
2208 | ||
2209 | printstr: | |
2210 | push zh | |
2211 | push zl | |
2212 | push yh | |
2213 | push yl | |
2214 | push temp | |
2215 | in r29,sph | |
2216 | in r28,spl | |
2217 | ldd zl,y+7 | |
2218 | ldd zh,y+6 | |
2219 | ||
2220 | lsl zl | |
2221 | rol zh | |
2222 | printstr_loop: | |
2223 | lpm temp,z+ | |
2224 | cpi temp,0 | |
2225 | breq printstr_end | |
2226 | rcall uartputc | |
2227 | cpi temp,13 | |
2228 | brne printstr_loop | |
2229 | ldi temp,10 | |
2230 | rcall uartputc | |
2231 | rjmp printstr_loop | |
2232 | ||
2233 | printstr_end: | |
2234 | adiw zl,1 | |
2235 | lsr zh | |
2236 | ror zl | |
2237 | ||
2238 | std y+7,zl | |
2239 | std y+6,zh | |
2240 | pop temp | |
2241 | pop yl | |
2242 | pop yh | |
2243 | pop zl | |
2244 | pop zh | |
2245 | ret | |
2246 | ||
2247 | ; --------------- AVR HW <-> Z80 periph stuff ------------------ | |
2248 | ||
2249 | .equ memReadByte = dram_read | |
2250 | .equ memWriteByte = dram_write | |
2251 | #if DRAM_WORD_ACCESS | |
2252 | .equ memReadWord = dram_read_w | |
2253 | .equ memWriteWord = dram_write_w | |
2254 | #endif | |
2255 | ||
2256 | ; -------------------------------------------------------------- | |
2257 | ||
2258 | .dseg | |
2259 | ||
2260 | #define RXBUFMASK RXBUFSIZE-1 | |
2261 | #define TXBUFMASK TXBUFSIZE-1 | |
2262 | ||
2263 | rxcount: | |
2264 | .byte 1 | |
2265 | rxidx_w: | |
2266 | .byte 1 | |
2267 | rxidx_r: | |
2268 | .byte 1 | |
2269 | txcount: | |
2270 | .byte 1 | |
2271 | txidx_w: | |
2272 | .byte 1 | |
2273 | txidx_r: | |
2274 | .byte 1 | |
2275 | rxfifo: | |
2276 | .byte RXBUFSIZE | |
2277 | txfifo: | |
2278 | .byte TXBUFSIZE | |
2279 | ||
2280 | ramtop: | |
2281 | .cseg | |
2282 | ||
2283 | ; Save received character in a circular buffer. Do nothing if buffer overflows. | |
2284 | ||
2285 | rxint: | |
2286 | push temp | |
2287 | in temp,sreg | |
2288 | push temp | |
2289 | push zh | |
2290 | push zl | |
2291 | inm8 temp,RXTXDR0 | |
2292 | lds zh,rxcount ;if rxcount < RXBUFSIZE | |
2293 | cpi zh,RXBUFSIZE ; (room for at least 1 char?) | |
2294 | brsh rxi_ov ; | |
2295 | inc zh ; | |
2296 | sts rxcount,zh ; rxcount++ | |
2297 | ||
2298 | ldi zl,low(rxfifo) ; | |
2299 | lds zh,rxidx_w ; | |
2300 | add zl,zh ; | |
2301 | inc zh ; | |
2302 | andi zh,RXBUFMASK ; | |
2303 | sts rxidx_w,zh ; rxidx_w = ++rxidx_w % RXBUFSIZE | |
2304 | ldi zh,high(rxfifo) ; | |
2305 | brcc PC+2 ; | |
2306 | inc zh ; | |
2307 | st z,temp ; rxfifo[rxidx_w] = char | |
2308 | rxi_ov: ;endif | |
2309 | pop zl | |
2310 | pop zh | |
2311 | pop temp | |
2312 | out sreg,temp | |
2313 | pop temp | |
2314 | reti | |
2315 | ||
2316 | ||
2317 | ;Fetches a char from the buffer to temp. If none available, waits till one is. | |
2318 | ||
2319 | uartgetc: | |
2320 | lds temp,rxcount ; Number of characters in buffer | |
2321 | tst temp | |
2322 | breq uartgetc | |
2323 | ||
2324 | push zh | |
2325 | push zl | |
2326 | ldi zl,low(rxfifo) | |
2327 | ldi zh,high(rxfifo) | |
2328 | lds temp,rxidx_r | |
2329 | add zl,temp | |
2330 | brcc PC+2 | |
2331 | inc zh | |
2332 | inc temp | |
2333 | andi temp,RXBUFMASK | |
2334 | sts rxidx_r,temp | |
2335 | cli | |
2336 | lds temp,rxcount | |
2337 | dec temp | |
2338 | sts rxcount,temp | |
2339 | sei | |
2340 | ld temp,z ;don't forget to get the char | |
2341 | pop zl | |
2342 | pop zh | |
2343 | ret | |
2344 | ||
2345 | txint: | |
2346 | push temp | |
2347 | in temp,sreg | |
2348 | push temp | |
2349 | lds temp,txcount ;if txcount != 0 | |
2350 | tst temp ; | |
2351 | breq txi_e ; | |
2352 | ||
2353 | dec temp ; | |
2354 | sts txcount,temp ; --txcount | |
2355 | push zh ; | |
2356 | push zl ; | |
2357 | ldi zl,low(txfifo) ; | |
2358 | ldi zh,high(txfifo) ; | |
2359 | lds temp,txidx_r ; | |
2360 | add zl,temp ; | |
2361 | brcc PC+2 ; | |
2362 | inc zh ; | |
2363 | inc temp ; | |
2364 | andi temp,TXBUFMASK ; | |
2365 | sts txidx_r,temp ; | |
2366 | ld temp,z | |
2367 | outm8 RXTXDR0,temp | |
2368 | pop zl | |
2369 | pop zh | |
2370 | txi_e: ;endif | |
2371 | lds temp,txcount | |
2372 | tst temp | |
2373 | brne txi_x | |
2374 | ldi temp, (1<<TXEN0) | (1<<RXEN0) | (1<<RXCIE0) | |
2375 | outm8 UCSR0B,temp | |
2376 | txi_x: | |
2377 | pop temp | |
2378 | out sreg,temp | |
2379 | pop temp | |
2380 | reti | |
2381 | ||
2382 | ||
2383 | ;Sends a char from temp to the uart. | |
2384 | uartputc: | |
2385 | push zh | |
2386 | push zl | |
2387 | push temp | |
2388 | putc_l: | |
2389 | lds temp,txcount ;do { | |
2390 | cpi temp,TXBUFSIZE ; | |
2391 | brsh putc_l ;} while (txcount >= TXBUFSIZE) | |
2392 | ||
2393 | ldi zl,low(txfifo) ; | |
2394 | ldi zh,high(txfifo) ; | |
2395 | lds temp,txidx_w ; | |
2396 | add zl,temp ; | |
2397 | brcc PC+2 ; | |
2398 | inc zh ; | |
2399 | inc temp ; | |
2400 | andi temp,TXBUFMASK ; | |
2401 | sts txidx_w,temp ; txidx_w = ++txidx_w % TXBUFSIZE | |
2402 | pop temp ; | |
2403 | st z,temp ; txfifo[txidx_w] = char | |
2404 | cli | |
2405 | lds zl,txcount | |
2406 | inc zl | |
2407 | sts txcount,zl | |
2408 | ldi zl, (1<<UDRIE0) | (1<<TXEN0) | (1<<RXEN0) | (1<<RXCIE0) | |
2409 | outm8 UCSR0B,zl | |
2410 | sei | |
2411 | pop zl | |
2412 | pop zh | |
2413 | ret | |
2414 | ||
2415 | ; ------------ Fetch phase stuff ----------------- | |
2416 | ||
2417 | .equ FETCH_NOP = (0<<0) | |
2418 | .equ FETCH_A = (1<<0) | |
2419 | .equ FETCH_B = (2<<0) | |
2420 | .equ FETCH_C = (3<<0) | |
2421 | .equ FETCH_D = (4<<0) | |
2422 | .equ FETCH_E = (5<<0) | |
2423 | .equ FETCH_H = (6<<0) | |
2424 | .equ FETCH_L = (7<<0) | |
2425 | .equ FETCH_AF = (8<<0) | |
2426 | .equ FETCH_BC = (9<<0) | |
2427 | .equ FETCH_DE = (10<<0) | |
2428 | .equ FETCH_HL = (11<<0) | |
2429 | .equ FETCH_SP = (12<<0) | |
2430 | .equ FETCH_MBC = (13<<0) | |
2431 | .equ FETCH_MDE = (14<<0) | |
2432 | .equ FETCH_MHL = (15<<0) | |
2433 | .equ FETCH_MSP = (16<<0) | |
2434 | .equ FETCH_DIR8 = (17<<0) | |
2435 | .equ FETCH_DIR16= (18<<0) | |
2436 | .equ FETCH_RST = (19<<0) | |
2437 | ||
2438 | ||
2439 | ;Jump table for fetch routines. Make sure to keep this in sync with the .equs! | |
2440 | fetchjumps: | |
2441 | rjmp do_fetch_nop | |
2442 | rjmp do_fetch_a | |
2443 | rjmp do_fetch_b | |
2444 | rjmp do_fetch_c | |
2445 | rjmp do_fetch_d | |
2446 | rjmp do_fetch_e | |
2447 | rjmp do_fetch_h | |
2448 | rjmp do_fetch_l | |
2449 | rjmp do_fetch_af | |
2450 | rjmp do_fetch_bc | |
2451 | rjmp do_fetch_de | |
2452 | rjmp do_fetch_hl | |
2453 | rjmp do_fetch_sp | |
2454 | rjmp do_fetch_mbc | |
2455 | rjmp do_fetch_mde | |
2456 | rjmp do_fetch_mhl | |
2457 | rjmp do_fetch_msp | |
2458 | rjmp do_fetch_dir8 | |
2459 | rjmp do_fetch_dir16 | |
2460 | rjmp do_fetch_rst | |
2461 | ||
2462 | do_fetch_nop: | |
2463 | ret | |
2464 | ||
2465 | do_fetch_a: | |
2466 | mov opl,z_a | |
2467 | ret | |
2468 | ||
2469 | do_fetch_b: | |
2470 | mov opl,z_b | |
2471 | ret | |
2472 | ||
2473 | do_fetch_c: | |
2474 | mov opl,z_c | |
2475 | ret | |
2476 | ||
2477 | do_fetch_d: | |
2478 | mov opl,z_d | |
2479 | ret | |
2480 | ||
2481 | do_fetch_e: | |
2482 | mov opl,z_e | |
2483 | ret | |
2484 | ||
2485 | do_fetch_h: | |
2486 | mov opl,z_h | |
2487 | ret | |
2488 | ||
2489 | do_fetch_l: | |
2490 | mov opl,z_l | |
2491 | ret | |
2492 | ||
2493 | do_fetch_af: | |
2494 | mov opl,z_flags | |
2495 | mov oph,z_a | |
2496 | ret | |
2497 | ||
2498 | do_fetch_bc: | |
2499 | movw opl,z_c | |
2500 | ret | |
2501 | ||
2502 | do_fetch_de: | |
2503 | movw opl,z_e | |
2504 | ret | |
2505 | ||
2506 | do_fetch_hl: | |
2507 | movw opl,z_l | |
2508 | ret | |
2509 | ||
2510 | do_fetch_sp: | |
2511 | movw opl,z_spl | |
2512 | ret | |
2513 | ||
2514 | do_fetch_mbc: | |
2515 | movw xl,z_c | |
2516 | rcall memReadByte | |
2517 | mov opl,temp | |
2518 | ret | |
2519 | ||
2520 | do_fetch_mde: | |
2521 | movw xl,z_e | |
2522 | rcall memReadByte | |
2523 | mov opl,temp | |
2524 | ret | |
2525 | ||
2526 | do_fetch_mhl: | |
2527 | movw xl,z_l | |
2528 | rcall memReadByte | |
2529 | mov opl,temp | |
2530 | ret | |
2531 | ||
2532 | do_fetch_msp: | |
2533 | movw xl,z_spl | |
2534 | #if DRAM_WORD_ACCESS | |
2535 | rcall memReadWord | |
2536 | movw opl,temp | |
2537 | #else | |
2538 | rcall memReadByte | |
2539 | mov opl,temp | |
2540 | adiw xl,1 | |
2541 | rcall memReadByte | |
2542 | mov oph,temp | |
2543 | #endif | |
2544 | ret | |
2545 | ||
2546 | do_fetch_dir8: | |
2547 | movw xl,z_pcl | |
2548 | rcall memReadByte | |
2549 | adiw z_pcl,1 | |
2550 | mov opl,temp | |
2551 | ret | |
2552 | ||
2553 | do_fetch_dir16: | |
2554 | movw xl,z_pcl | |
2555 | #if DRAM_WORD_ACCESS | |
2556 | rcall memReadWord | |
2557 | movw opl,temp | |
2558 | #else | |
2559 | rcall memReadByte | |
2560 | mov opl,temp | |
2561 | adiw xl,1 | |
2562 | rcall memReadByte | |
2563 | mov oph,temp | |
2564 | #endif | |
2565 | adiw z_pcl,2 | |
2566 | ret | |
2567 | ||
2568 | do_fetch_rst: | |
2569 | movw xl,z_pcl | |
2570 | subi xl,1 | |
2571 | sbci xh,0 | |
2572 | rcall memReadByte | |
2573 | andi temp,0x38 | |
2574 | ldi oph,0 | |
2575 | mov opl,temp | |
2576 | ret | |
2577 | ||
2578 | ||
2579 | ||
2580 | ; ------------ Store phase stuff ----------------- | |
2581 | ||
2582 | .equ STORE_NOP = (0<<5) | |
2583 | .equ STORE_A = (1<<5) | |
2584 | .equ STORE_B = (2<<5) | |
2585 | .equ STORE_C = (3<<5) | |
2586 | .equ STORE_D = (4<<5) | |
2587 | .equ STORE_E = (5<<5) | |
2588 | .equ STORE_H = (6<<5) | |
2589 | .equ STORE_L = (7<<5) | |
2590 | .equ STORE_AF = (8<<5) | |
2591 | .equ STORE_BC = (9<<5) | |
2592 | .equ STORE_DE = (10<<5) | |
2593 | .equ STORE_HL = (11<<5) | |
2594 | .equ STORE_SP = (12<<5) | |
2595 | .equ STORE_PC = (13<<5) | |
2596 | .equ STORE_MBC = (14<<5) | |
2597 | .equ STORE_MDE = (15<<5) | |
2598 | .equ STORE_MHL = (16<<5) | |
2599 | .equ STORE_MSP = (17<<5) | |
2600 | .equ STORE_RET = (18<<5) | |
2601 | .equ STORE_CALL = (19<<5) | |
2602 | .equ STORE_AM = (20<<5) | |
2603 | ||
2604 | ;Jump table for store routines. Make sure to keep this in sync with the .equs! | |
2605 | storejumps: | |
2606 | rjmp do_store_nop | |
2607 | rjmp do_store_a | |
2608 | rjmp do_store_b | |
2609 | rjmp do_store_c | |
2610 | rjmp do_store_d | |
2611 | rjmp do_store_e | |
2612 | rjmp do_store_h | |
2613 | rjmp do_store_l | |
2614 | rjmp do_store_af | |
2615 | rjmp do_store_bc | |
2616 | rjmp do_store_de | |
2617 | rjmp do_store_hl | |
2618 | rjmp do_store_sp | |
2619 | rjmp do_store_pc | |
2620 | rjmp do_store_mbc | |
2621 | rjmp do_store_mde | |
2622 | rjmp do_store_mhl | |
2623 | rjmp do_store_msp | |
2624 | rjmp do_store_ret | |
2625 | rjmp do_store_call | |
2626 | rjmp do_store_am | |
2627 | ||
2628 | ||
2629 | do_store_nop: | |
2630 | ret | |
2631 | ||
2632 | do_store_a: | |
2633 | mov z_a,opl | |
2634 | ret | |
2635 | ||
2636 | do_store_b: | |
2637 | mov z_b,opl | |
2638 | ret | |
2639 | ||
2640 | do_store_c: | |
2641 | mov z_c,opl | |
2642 | ret | |
2643 | ||
2644 | do_store_d: | |
2645 | mov z_d,opl | |
2646 | ret | |
2647 | ||
2648 | do_store_e: | |
2649 | mov z_e,opl | |
2650 | ret | |
2651 | ||
2652 | do_store_h: | |
2653 | mov z_h,opl | |
2654 | ret | |
2655 | ||
2656 | do_store_l: | |
2657 | mov z_l,opl | |
2658 | ret | |
2659 | ||
2660 | do_store_af: | |
2661 | mov z_a,oph | |
2662 | mov z_flags,opl | |
2663 | ret | |
2664 | ||
2665 | do_store_bc: | |
2666 | mov z_b,oph | |
2667 | mov z_c,opl | |
2668 | ret | |
2669 | ||
2670 | do_store_de: | |
2671 | mov z_d,oph | |
2672 | mov z_e,opl | |
2673 | ret | |
2674 | ||
2675 | do_store_hl: | |
2676 | mov z_h,oph | |
2677 | mov z_l,opl | |
2678 | ret | |
2679 | ||
2680 | do_store_mbc: | |
2681 | movw xl,z_c | |
2682 | mov temp,opl | |
2683 | rcall memWriteByte | |
2684 | ret | |
2685 | ||
2686 | do_store_mde: | |
2687 | movw xl,z_e | |
2688 | mov temp,opl | |
2689 | rcall memWriteByte | |
2690 | ret | |
2691 | ||
2692 | do_store_mhl: | |
2693 | movw xl,z_l | |
2694 | mov temp,opl | |
2695 | rcall memWriteByte | |
2696 | ret | |
2697 | ||
2698 | do_store_msp: | |
2699 | movw xl,z_spl | |
2700 | #if DRAM_WORD_ACCESS | |
2701 | movw temp,opl | |
2702 | rcall memWriteWord | |
2703 | #else | |
2704 | mov temp,opl | |
2705 | rcall memWriteByte | |
2706 | adiw xl,1 | |
2707 | mov temp,oph | |
2708 | rcall memWriteByte | |
2709 | #endif | |
2710 | ret | |
2711 | ||
2712 | do_store_sp: | |
2713 | movw z_spl,opl | |
2714 | ret | |
2715 | ||
2716 | do_store_pc: | |
2717 | movw z_pcl,opl | |
2718 | ret | |
2719 | ||
2720 | do_store_ret: | |
2721 | rcall do_op_pop16 | |
2722 | movw z_pcl,opl | |
2723 | ret | |
2724 | ||
2725 | do_store_call: | |
2726 | push opl | |
2727 | push oph | |
2728 | movw opl,z_pcl | |
2729 | rcall do_op_push16 | |
2730 | pop z_pch | |
2731 | pop z_pcl | |
2732 | ret | |
2733 | ||
2734 | do_store_am: | |
2735 | movw xl,opl | |
2736 | mov temp,z_a | |
2737 | rcall memWriteByte | |
2738 | ret | |
2739 | ||
2740 | ||
2741 | ; ------------ Operation phase stuff ----------------- | |
2742 | ||
2743 | ||
2744 | .equ OP_NOP = (0<<10) | |
2745 | .equ OP_INC = (1<<10) | |
2746 | .equ OP_DEC = (2<<10) | |
2747 | .equ OP_INC16 = (3<<10) | |
2748 | .equ OP_DEC16 = (4<<10) | |
2749 | .equ OP_RLC = (5<<10) | |
2750 | .equ OP_RRC = (6<<10) | |
2751 | .equ OP_RR = (7<<10) | |
2752 | .equ OP_RL = (8<<10) | |
2753 | .equ OP_ADDA = (9<<10) | |
2754 | .equ OP_ADCA = (10<<10) | |
2755 | .equ OP_SUBFA = (11<<10) | |
2756 | .equ OP_SBCFA = (12<<10) | |
2757 | .equ OP_ANDA = (13<<10) | |
2758 | .equ OP_ORA = (14<<10) | |
2759 | .equ OP_XORA = (15<<10) | |
2760 | .equ OP_ADDHL = (16<<10) | |
2761 | .equ OP_STHL = (17<<10) ;store HL in fetched address | |
2762 | .equ OP_RMEM16 = (18<<10) ;read mem at fetched address | |
2763 | .equ OP_RMEM8 = (19<<10) ;read mem at fetched address | |
2764 | .equ OP_DA = (20<<10) | |
2765 | .equ OP_SCF = (21<<10) | |
2766 | .equ OP_CPL = (22<<10) | |
2767 | .equ OP_CCF = (23<<10) | |
2768 | .equ OP_POP16 = (24<<10) | |
2769 | .equ OP_PUSH16 = (25<<10) | |
2770 | .equ OP_IFNZ = (26<<10) | |
2771 | .equ OP_IFZ = (27<<10) | |
2772 | .equ OP_IFNC = (28<<10) | |
2773 | .equ OP_IFC = (29<<10) | |
2774 | .equ OP_IFPO = (30<<10) | |
2775 | .equ OP_IFPE = (31<<10) | |
2776 | .equ OP_IFP = (32<<10) | |
2777 | .equ OP_IFM = (33<<10) | |
2778 | .equ OP_OUTA = (34<<10) | |
2779 | .equ OP_IN = (35<<10) | |
2780 | .equ OP_EXHL = (36<<10) | |
2781 | .equ OP_DI = (37<<10) | |
2782 | .equ OP_EI = (38<<10) | |
2783 | .equ OP_INV = (39<<10) | |
2784 | .equ OP_CPFA = (40<<10) | |
2785 | .equ OP_INCA = (41<<10) | |
2786 | .equ OP_DECA = (42<<10) | |
2787 | ||
2788 | opjumps: | |
2789 | rjmp do_op_nop | |
2790 | rjmp do_op_inc | |
2791 | rjmp do_op_dec | |
2792 | rjmp do_op_inc16 | |
2793 | rjmp do_op_dec16 | |
2794 | rjmp do_op_rlc | |
2795 | rjmp do_op_rrc | |
2796 | rjmp do_op_rr | |
2797 | rjmp do_op_rl | |
2798 | rjmp do_op_adda | |
2799 | rjmp do_op_adca | |
2800 | rjmp do_op_subfa | |
2801 | rjmp do_op_sbcfa | |
2802 | rjmp do_op_anda | |
2803 | rjmp do_op_ora | |
2804 | rjmp do_op_xora | |
2805 | rjmp do_op_addhl | |
2806 | rjmp do_op_sthl | |
2807 | rjmp do_op_rmem16 | |
2808 | rjmp do_op_rmem8 | |
2809 | rjmp do_op_da | |
2810 | rjmp do_op_scf | |
2811 | rjmp do_op_cpl | |
2812 | rjmp do_op_ccf | |
2813 | rjmp do_op_pop16 | |
2814 | rjmp do_op_push16 | |
2815 | rjmp do_op_ifnz | |
2816 | rjmp do_op_ifz | |
2817 | rjmp do_op_ifnc | |
2818 | rjmp do_op_ifc | |
2819 | rjmp do_op_ifpo | |
2820 | rjmp do_op_ifpe | |
2821 | rjmp do_op_ifp | |
2822 | rjmp do_op_ifm | |
2823 | rjmp do_op_outa | |
2824 | rjmp do_op_in | |
2825 | rjmp do_op_exhl | |
2826 | rjmp do_op_di | |
2827 | rjmp do_op_ei | |
2828 | rjmp do_op_inv | |
2829 | rjmp do_op_cpfa | |
2830 | rjmp do_op_inca | |
2831 | rjmp do_op_deca | |
2832 | ||
2833 | ||
2834 | ;How the flags are supposed to work: | |
2835 | ;7 ZFL_S - Sign flag (=MSBit of result) | |
2836 | ;6 ZFL_Z - Zero flag. Is 1 when the result is 0 | |
2837 | ;4 ZFL_H - Half-carry (carry from bit 3 to 4) | |
2838 | ;2 ZFL_P - Parity/2-complement Overflow | |
2839 | ;1 ZFL_N - Subtract - set if last op was a subtract | |
2840 | ;0 ZFL_C - Carry | |
2841 | ; | |
2842 | ;I sure hope I got the mapping between flags and instructions correct... | |
2843 | ||
2844 | ;---------------------------------------------------------------- | |
2845 | ;| | | |
2846 | ;| Zilog | | |
2847 | ;| | | |
2848 | ;| ZZZZZZZ 88888 000 | | |
2849 | ;| Z 8 8 0 0 | | |
2850 | ;| Z 8 8 0 0 0 | | |
2851 | ;| Z 88888 0 0 0 | | |
2852 | ;| Z 8 8 0 0 0 | | |
2853 | ;| Z 8 8 0 0 | | |
2854 | ;| ZZZZZZZ 88888 000 | | |
2855 | ;| | | |
2856 | ;| Z80 MICROPROCESSOR Instruction Set Summary | | |
2857 | ;| | | |
2858 | ;---------------------------------------------------------------- | |
2859 | ;---------------------------------------------------------------- | |
2860 | ;|Mnemonic |SZHPNC|Description |Notes | | |
2861 | ;|----------+------+---------------------+----------------------| | |
2862 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | | |
2863 | ;|ADC HL,ss |**?V0*|Add with Carry |HL=HL+ss+CY | | |
2864 | ;|ADD A,s |***V0*|Add |A=A+s | | |
2865 | ;|ADD HL,ss |--?-0*|Add |HL=HL+ss | | |
2866 | ;|ADD IX,pp |--?-0*|Add |IX=IX+pp | | |
2867 | ;|ADD IY,rr |--?-0*|Add |IY=IY+rr | | |
2868 | ;|AND s |**1P00|Logical AND |A=A&s | | |
2869 | ;|BIT b,m |?*1?0-|Test Bit |m&{2^b} | | |
2870 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
2871 | ;|CALL nn |------|Unconditional Call |-[SP]=PC,PC=nn | | |
2872 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY | | |
2873 | ;|CP s |***V1*|Compare |A-s | | |
2874 | ;|CPD |****1-|Compare and Decrement|A-[HL],HL=HL-1,BC=BC-1| | |
2875 | ;|CPDR |****1-|Compare, Dec., Repeat|CPD till A=[HL]or BC=0| | |
2876 | ;|CPI |****1-|Compare and Increment|A-[HL],HL=HL+1,BC=BC-1| | |
2877 | ;|CPIR |****1-|Compare, Inc., Repeat|CPI till A=[HL]or BC=0| | |
2878 | ;|CPL |--1-1-|Complement |A=~A | | |
2879 | ;|DAA |***P-*|Decimal Adjust Acc. |A=BCD format | | |
2880 | ;|DEC s |***V1-|Decrement |s=s-1 | | |
2881 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
2882 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
2883 | ;|DI |------|Disable Interrupts | | | |
2884 | ;|DJNZ e |------|Dec., Jump Non-Zero |B=B-1 till B=0 | | |
2885 | ;|EI |------|Enable Interrupts | | | |
2886 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | | |
2887 | ;|EX [SP],xx|------|Exchange |[SP]<->xx | | |
2888 | ;|EX AF,AF' |------|Exchange |AF<->AF' | | |
2889 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
2890 | ;|EXX |------|Exchange |qq<->qq' (except AF)| | |
2891 | ;|HALT |------|Halt | | | |
2892 | ;|IM n |------|Interrupt Mode | (n=0,1,2)| | |
2893 | ;|IN A,[n] |------|Input |A=[n] | | |
2894 | ;|IN r,[C] |***P0-|Input |r=[C] | | |
2895 | ;|INC r |***V0-|Increment |r=r+1 | | |
2896 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
2897 | ;|INC xx |------|Increment |xx=xx+1 | | |
2898 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
2899 | ;|INC ss |------|Increment |ss=ss+1 | | |
2900 | ;|IND |?*??1-|Input and Decrement |[HL]=[C],HL=HL-1,B=B-1| | |
2901 | ;|INDR |?1??1-|Input, Dec., Repeat |IND till B=0 | | |
2902 | ;|INI |?*??1-|Input and Increment |[HL]=[C],HL=HL+1,B=B-1| | |
2903 | ;|INIR |?1??1-|Input, Inc., Repeat |INI till B=0 | | |
2904 | ;|JP [HL] |------|Unconditional Jump |PC=[HL] | | |
2905 | ;|JP [xx] |------|Unconditional Jump |PC=[xx] | | |
2906 | ;|JP nn |------|Unconditional Jump |PC=nn | | |
2907 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
2908 | ;|JR e |------|Unconditional Jump |PC=PC+e | | |
2909 | ;|JR cc,e |------|Conditional Jump |If cc JR(cc=C,NC,NZ,Z)| | |
2910 | ;|LD dst,src|------|Load |dst=src | | |
2911 | ;|LD A,i |**0*0-|Load |A=i (i=I,R)| | |
2912 | ;|LDD |--0*0-|Load and Decrement |[DE]=[HL],HL=HL-1,# | | |
2913 | ;|LDDR |--000-|Load, Dec., Repeat |LDD till BC=0 | | |
2914 | ;|LDI |--0*0-|Load and Increment |[DE]=[HL],HL=HL+1,# | | |
2915 | ;|LDIR |--000-|Load, Inc., Repeat |LDI till BC=0 | | |
2916 | ;|NEG |***V1*|Negate |A=-A | | |
2917 | ;|NOP |------|No Operation | | | |
2918 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | | |
2919 | ;|OTDR |?1??1-|Output, Dec., Repeat |OUTD till B=0 | | |
2920 | ;|OTIR |?1??1-|Output, Inc., Repeat |OUTI till B=0 | | |
2921 | ;|OUT [C],r |------|Output |[C]=r | | |
2922 | ;|OUT [n],A |------|Output |[n]=A | | |
2923 | ;|OUTD |?*??1-|Output and Decrement |[C]=[HL],HL=HL-1,B=B-1| | |
2924 | ;|OUTI |?*??1-|Output and Increment |[C]=[HL],HL=HL+1,B=B-1| | |
2925 | ;|POP xx |------|Pop |xx=[SP]+ | | |
2926 | ;|POP qq |------|Pop |qq=[SP]+ | | |
2927 | ;|PUSH xx |------|Push |-[SP]=xx | | |
2928 | ;|PUSH qq |------|Push |-[SP]=qq | | |
2929 | ;|RES b,m |------|Reset bit |m=m&{~2^b} | | |
2930 | ;|RET |------|Return |PC=[SP]+ | | |
2931 | ;|RET cc |------|Conditional Return |If cc RET | | |
2932 | ;|RETI |------|Return from Interrupt|PC=[SP]+ | | |
2933 | ;|RETN |------|Return from NMI |PC=[SP]+ | | |
2934 | ;|RL m |**0P0*|Rotate Left |m={CY,m}<- | | |
2935 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | | |
2936 | ;|RLC m |**0P0*|Rotate Left Circular |m=m<- | | |
2937 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
2938 | ;|RLD |**0P0-|Rotate Left 4 bits |{A,[HL]}={A,[HL]}<- ##| | |
2939 | ;|RR m |**0P0*|Rotate Right |m=->{CY,m} | | |
2940 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
2941 | ;|RRC m |**0P0*|Rotate Right Circular|m=->m | | |
2942 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
2943 | ;|RRD |**0P0-|Rotate Right 4 bits |{A,[HL]}=->{A,[HL]} ##| | |
2944 | ;|RST p |------|Restart | (p=0H,8H,10H,...,38H)| | |
2945 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | | |
2946 | ;|SBC HL,ss |**?V1*|Subtract with Carry |HL=HL-ss-CY | | |
2947 | ;|SCF |--0-01|Set Carry Flag |CY=1 | | |
2948 | ;|SET b,m |------|Set bit |m=mv{2^b} | | |
2949 | ;|SLA m |**0P0*|Shift Left Arithmetic|m=m*2 | | |
2950 | ;|SRA m |**0P0*|Shift Right Arith. |m=m/2 | | |
2951 | ;|SRL m |**0P0*|Shift Right Logical |m=->{0,m,CY} | | |
2952 | ;|SUB s |***V1*|Subtract |A=A-s | | |
2953 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | | |
2954 | ;|----------+------+--------------------------------------------| | |
2955 | ;| F |-*01? |Flag unaffected/affected/reset/set/unknown | | |
2956 | ;| S |S |Sign flag (Bit 7) | | |
2957 | ;| Z | Z |Zero flag (Bit 6) | | |
2958 | ;| HC | H |Half Carry flag (Bit 4) | | |
2959 | ;| P/V | P |Parity/Overflow flag (Bit 2, V=overflow) | | |
2960 | ;| N | N |Add/Subtract flag (Bit 1) | | |
2961 | ;| CY | C|Carry flag (Bit 0) | | |
2962 | ;|-----------------+--------------------------------------------| | |
2963 | ;| n |Immediate addressing | | |
2964 | ;| nn |Immediate extended addressing | | |
2965 | ;| e |Relative addressing (PC=PC+2+offset) | | |
2966 | ;| [nn] |Extended addressing | | |
2967 | ;| [xx+d] |Indexed addressing | | |
2968 | ;| r |Register addressing | | |
2969 | ;| [rr] |Register indirect addressing | | |
2970 | ;| |Implied addressing | | |
2971 | ;| b |Bit addressing | | |
2972 | ;| p |Modified page zero addressing (see RST) | | |
2973 | ;|-----------------+--------------------------------------------| | |
2974 | ;|DEFB n(,...) |Define Byte(s) | | |
2975 | ;|DEFB 'str'(,...) |Define Byte ASCII string(s) | | |
2976 | ;|DEFS nn |Define Storage Block | | |
2977 | ;|DEFW nn(,...) |Define Word(s) | | |
2978 | ;|-----------------+--------------------------------------------| | |
2979 | ;| A B C D E |Registers (8-bit) | | |
2980 | ;| AF BC DE HL |Register pairs (16-bit) | | |
2981 | ;| F |Flag register (8-bit) | | |
2982 | ;| I |Interrupt page address register (8-bit) | | |
2983 | ;| IX IY |Index registers (16-bit) | | |
2984 | ;| PC |Program Counter register (16-bit) | | |
2985 | ;| R |Memory Refresh register | | |
2986 | ;| SP |Stack Pointer register (16-bit) | | |
2987 | ;|-----------------+--------------------------------------------| | |
2988 | ;| b |One bit (0 to 7) | | |
2989 | ;| cc |Condition (C,M,NC,NZ,P,PE,PO,Z) | | |
2990 | ;| d |One-byte expression (-128 to +127) | | |
2991 | ;| dst |Destination s, ss, [BC], [DE], [HL], [nn] | | |
2992 | ;| e |One-byte expression (-126 to +129) | | |
2993 | ;| m |Any register r, [HL] or [xx+d] | | |
2994 | ;| n |One-byte expression (0 to 255) | | |
2995 | ;| nn |Two-byte expression (0 to 65535) | | |
2996 | ;| pp |Register pair BC, DE, IX or SP | | |
2997 | ;| qq |Register pair AF, BC, DE or HL | | |
2998 | ;| qq' |Alternative register pair AF, BC, DE or HL | | |
2999 | ;| r |Register A, B, C, D, E, H or L | | |
3000 | ;| rr |Register pair BC, DE, IY or SP | | |
3001 | ;| s |Any register r, value n, [HL] or [xx+d] | | |
3002 | ;| src |Source s, ss, [BC], [DE], [HL], nn, [nn] | | |
3003 | ;| ss |Register pair BC, DE, HL or SP | | |
3004 | ;| xx |Index register IX or IY | | |
3005 | ;|-----------------+--------------------------------------------| | |
3006 | ;| + - * / ^ |Add/subtract/multiply/divide/exponent | | |
3007 | ;| & ~ v x |Logical AND/NOT/inclusive OR/exclusive OR | | |
3008 | ;| <- -> |Rotate left/right | | |
3009 | ;| [ ] |Indirect addressing | | |
3010 | ;| [ ]+ -[ ] |Indirect addressing auto-increment/decrement| | |
3011 | ;| { } |Combination of operands | | |
3012 | ;| # |Also BC=BC-1,DE=DE-1 | | |
3013 | ;| ## |Only lower 4 bits of accumulator A used | | |
3014 | ;---------------------------------------------------------------- | |
3015 | ||
3016 | ||
3017 | .equ AVR_T = SREG_T | |
3018 | .equ AVR_H = SREG_H | |
3019 | .equ AVR_S = SREG_S | |
3020 | .equ AVR_V = SREG_V | |
3021 | .equ AVR_N = SREG_N | |
3022 | .equ AVR_Z = SREG_Z | |
3023 | .equ AVR_C = SREG_C | |
3024 | ||
3025 | ;------------------------------------------------; | |
3026 | ; Move single bit between two registers | |
3027 | ; | |
3028 | ; bmov dstreg,dstbit,srcreg.srcbit | |
3029 | ||
3030 | .macro bmov | |
3031 | bst @2,@3 | |
3032 | bld @0,@1 | |
3033 | .endm | |
3034 | ||
3035 | ||
3036 | ;------------------------------------------------; | |
3037 | ; Load table value from flash indexed by source reg. | |
3038 | ; | |
3039 | ; ldpmx dstreg,tablebase,indexreg | |
3040 | ; | |
3041 | ; (6 words, 8 cycles) | |
3042 | ||
3043 | .macro ldpmx | |
3044 | ldi zh,high(@1*2) ; table must be page aligned | |
3045 | mov zl,@2 | |
3046 | lpm @0,z | |
3047 | .endm | |
3048 | .macro do_z80_flags_HP | |
3049 | #if EM_Z80 | |
3050 | bmov z_flags, ZFL_P, temp, AVR_V | |
3051 | bmov z_flags, ZFL_H, temp, AVR_H | |
3052 | #endif | |
3053 | .endm | |
3054 | ||
3055 | .macro do_z80_flags_set_N | |
3056 | #if EM_Z80 | |
3057 | ori z_flags, (1<<ZFL_N) ; Negation auf 1 | |
3058 | #endif | |
3059 | .endm | |
3060 | ||
3061 | .macro do_z80_flags_set_HN | |
3062 | #if EM_Z80 | |
3063 | ori z_flags,(1<<ZFL_N)|(1<<ZFL_H) | |
3064 | #endif | |
3065 | .endm | |
3066 | ||
3067 | .macro do_z80_flags_clear_N | |
3068 | #if EM_Z80 | |
3069 | andi z_flags,~(1<<ZFL_N) | |
3070 | #endif | |
3071 | .endm | |
3072 | ||
3073 | .macro do_z80_flags_op_rotate | |
3074 | ; must not change avr carry flag! | |
3075 | #if EM_Z80 | |
3076 | andi z_flags, ~( (1<<ZFL_H) | (1<<ZFL_N) | (1<<ZFL_C) ) | |
3077 | #else | |
3078 | andi z_flags, ~( (1<<ZFL_C) ) | |
3079 | #endif | |
3080 | .endm | |
3081 | ||
3082 | .macro do_z80_flags_op_and | |
3083 | #if EM_Z80 | |
3084 | ori z_flags,(1<<ZFL_H) | |
3085 | #else | |
3086 | ori z_flags,(1<<ZFL_H) | |
3087 | #endif | |
3088 | .endm | |
3089 | ||
3090 | .macro do_z80_flags_op_or | |
3091 | #if EM_Z80 | |
3092 | #endif | |
3093 | .endm | |
3094 | ||
3095 | ||
3096 | do_op_nop: | |
3097 | ret | |
3098 | ||
3099 | ;---------------------------------------------------------------- | |
3100 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3101 | ;---------------------------------------------------------------- | |
3102 | ;|INC r |***V0-|Increment |r=r+1 | | |
3103 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
3104 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
3105 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3106 | ;|INC r |**-P0-|Increment |r=r+1 | | |
3107 | ;|INC [HL] |**-P0-|Increment |[HL]=[HL]+1 | | |
3108 | ; | |
3109 | ; | |
3110 | do_op_inc: | |
3111 | inc opl | |
3112 | #if EM_Z80 | |
3113 | in temp, sreg | |
3114 | #endif | |
3115 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
3116 | ldpmx temp2, sz53p_tab, opl | |
3117 | or z_flags,temp2 ; | |
3118 | do_z80_flags_HP | |
3119 | ret | |
3120 | ||
3121 | do_op_inca: | |
3122 | inc z_a | |
3123 | #if EM_Z80 | |
3124 | in temp, sreg | |
3125 | #endif | |
3126 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
3127 | ldpmx temp2, sz53p_tab, z_a | |
3128 | or z_flags,temp2 ; | |
3129 | do_z80_flags_HP | |
3130 | ret | |
3131 | ||
3132 | ;---------------------------------------------------------------- | |
3133 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3134 | ;---------------------------------------------------------------- | |
3135 | ;|DEC r |***V1-|Decrement |s=s-1 | | |
3136 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
3137 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
3138 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3139 | ;|DEC r |**-P -|Increment |r=r+1 | | |
3140 | ;|DEC [HL] |**-P -|Increment |[HL]=[HL]+1 | | |
3141 | ; | |
3142 | ; | |
3143 | do_op_dec: | |
3144 | dec opl | |
3145 | #if EM_Z80 | |
3146 | in temp, sreg | |
3147 | #endif | |
3148 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
3149 | ldpmx temp2, sz53p_tab, opl | |
3150 | or z_flags,temp2 ; | |
3151 | do_z80_flags_HP | |
3152 | do_z80_flags_set_N | |
3153 | ret | |
3154 | ||
3155 | do_op_deca: | |
3156 | dec z_a | |
3157 | #if EM_Z80 | |
3158 | in temp, sreg | |
3159 | #endif | |
3160 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
3161 | ldpmx temp2, sz53p_tab, z_a | |
3162 | or z_flags,temp2 ; | |
3163 | do_z80_flags_HP | |
3164 | do_z80_flags_set_N | |
3165 | ret | |
3166 | ||
3167 | ;---------------------------------------------------------------- | |
3168 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3169 | ;---------------------------------------------------------------- | |
3170 | ;|INC xx |------|Increment |xx=xx+1 | | |
3171 | ;|INC ss |------|Increment |ss=ss+1 | | |
3172 | ; | |
3173 | ; | |
3174 | do_op_inc16: | |
3175 | subi opl,low(-1) | |
3176 | sbci oph,high(-1) | |
3177 | ret | |
3178 | ||
3179 | ;---------------------------------------------------------------- | |
3180 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3181 | ;---------------------------------------------------------------- | |
3182 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
3183 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
3184 | ; | |
3185 | ; | |
3186 | do_op_dec16: | |
3187 | subi opl, 1 | |
3188 | sbci oph, 0 | |
3189 | ret | |
3190 | ||
3191 | ;---------------------------------------------------------------- | |
3192 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3193 | ;---------------------------------------------------------------- | |
3194 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
3195 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3196 | ;|RLCA |---- *|Rotate Left Circular |A=A<- | | |
3197 | ; | |
3198 | ; | |
3199 | do_op_rlc: | |
3200 | ;Rotate Left Cyclical. All bits move 1 to the | |
3201 | ;left, the msb becomes c and lsb. | |
3202 | do_z80_flags_op_rotate | |
3203 | lsl opl | |
3204 | brcc do_op_rlc_noc | |
3205 | ori opl, 1 | |
3206 | ori z_flags, (1<<ZFL_C) | |
3207 | do_op_rlc_noc: | |
3208 | ret | |
3209 | ||
3210 | ;---------------------------------------------------------------- | |
3211 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3212 | ;---------------------------------------------------------------- | |
3213 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
3214 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3215 | ;|RRCA |---- *|Rotate Right Circular|A=->A | | |
3216 | ; | |
3217 | ; | |
3218 | do_op_rrc: | |
3219 | ;Rotate Right Cyclical. All bits move 1 to the | |
3220 | ;right, the lsb becomes c and msb. | |
3221 | do_z80_flags_op_rotate | |
3222 | lsr opl | |
3223 | brcc do_op_rrc_noc | |
3224 | ori opl, 0x80 | |
3225 | ori z_flags, (1<<ZFL_C) | |
3226 | do_op_rrc_noc: | |
3227 | ret | |
3228 | ||
3229 | ;---------------------------------------------------------------- | |
3230 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3231 | ;---------------------------------------------------------------- | |
3232 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
3233 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3234 | ;|RRA |---- *|Rotate Right Acc. |A=->{CY,A} | | |
3235 | ; | |
3236 | ; | |
3237 | do_op_rr: | |
3238 | ;Rotate Right. All bits move 1 to the right, the lsb | |
3239 | ;becomes c, c becomes msb. | |
3240 | clc ; get z80 carry to avr carry | |
3241 | sbrc z_flags,ZFL_C | |
3242 | sec | |
3243 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) | |
3244 | bmov z_flags,ZFL_C, opl,0 ; Bit 0 --> CY | |
3245 | ror opl | |
3246 | ret | |
3247 | ||
3248 | ;---------------------------------------------------------------- | |
3249 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3250 | ;---------------------------------------------------------------- | |
3251 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | | |
3252 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3253 | ;|RLA |---- *|Rotate Left Acc. |A={CY,A}<- | | |
3254 | ; | |
3255 | ; | |
3256 | do_op_rl: | |
3257 | ;Rotate Left. All bits move 1 to the left, the msb | |
3258 | ;becomes c, c becomes lsb. | |
3259 | clc | |
3260 | sbrc z_flags,ZFL_C | |
3261 | sec | |
3262 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) | |
3263 | bmov z_flags,ZFL_C, opl,7 ; Bit 7 --> CY | |
3264 | rol opl | |
3265 | ret | |
3266 | ||
3267 | ;---------------------------------------------------------------- | |
3268 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3269 | ;---------------------------------------------------------------- | |
3270 | ;|ADD A,s |***V0*|Add |A=A+s | | |
3271 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3272 | ;|ADD A,s |***P *|Add |A=A+s | | |
3273 | ; | |
3274 | ; | |
3275 | do_op_adda: | |
3276 | add z_a,opl | |
3277 | in temp,sreg | |
3278 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P flag | |
3279 | bmov z_flags,ZFL_C, temp,AVR_C | |
3280 | do_z80_flags_HP | |
3281 | ret | |
3282 | ||
3283 | ;---------------------------------------------------------------- | |
3284 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3285 | ;---------------------------------------------------------------- | |
3286 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | | |
3287 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3288 | ;|ADC A,s |***P *|Add with Carry |A=A+s+CY | | |
3289 | ; | |
3290 | ; | |
3291 | do_op_adca: | |
3292 | clc | |
3293 | sbrc z_flags,ZFL_C | |
3294 | sec | |
3295 | adc z_a,opl | |
3296 | in temp,sreg | |
3297 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
3298 | bmov z_flags,ZFL_C, temp,AVR_C | |
3299 | do_z80_flags_HP | |
3300 | ret | |
3301 | ||
3302 | ;---------------------------------------------------------------- | |
3303 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3304 | ;---------------------------------------------------------------- | |
3305 | ;|SUB s |***V1*|Subtract |A=A-s | | |
3306 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3307 | ;|SUB s |***P *|Subtract |A=A-s | | |
3308 | ||
3309 | ; | |
3310 | do_op_subfa: | |
3311 | sub z_a,opl | |
3312 | in temp,sreg | |
3313 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
3314 | bmov z_flags,ZFL_C, temp,AVR_C | |
3315 | do_z80_flags_HP | |
3316 | do_z80_flags_set_N | |
3317 | ret | |
3318 | ||
3319 | ;---------------------------------------------------------------- | |
3320 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3321 | ;---------------------------------------------------------------- | |
3322 | ;|CP s |***V1*|Compare |A-s | | |
3323 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3324 | ;|CP s |***P *|Compare |A-s | | |
3325 | ||
3326 | ; | |
3327 | do_op_cpfa: | |
3328 | mov temp,z_a | |
3329 | sub temp,opl | |
3330 | mov opl,temp | |
3331 | in temp,sreg | |
3332 | ldpmx z_flags,sz53p_tab,opl ;S,Z,P | |
3333 | bmov z_flags,ZFL_C, temp,AVR_C | |
3334 | do_z80_flags_HP | |
3335 | do_z80_flags_set_N | |
3336 | ret | |
3337 | ||
3338 | ;---------------------------------------------------------------- | |
3339 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3340 | ;---------------------------------------------------------------- | |
3341 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | | |
3342 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3343 | ;|SBC A,s |***P *|Subtract with Carry |A=A-s-CY | | |
3344 | ; | |
3345 | ; | |
3346 | do_op_sbcfa: | |
3347 | clc | |
3348 | sbrc z_flags,ZFL_C | |
3349 | sec | |
3350 | sbc z_a,opl | |
3351 | in temp,sreg | |
3352 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
3353 | bmov z_flags,ZFL_C, temp,AVR_C | |
3354 | do_z80_flags_HP | |
3355 | do_z80_flags_set_N | |
3356 | ret | |
3357 | ||
3358 | ;---------------------------------------------------------------- | |
3359 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3360 | ;---------------------------------------------------------------- | |
3361 | ;|AND s |**1P00|Logical AND |A=A&s | | |
3362 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3363 | ;|AND s |**-P 0|Logical AND |A=A&s | | |
3364 | ; | |
3365 | ; TODO H-Flag | |
3366 | do_op_anda: | |
3367 | and z_a,opl ; | |
3368 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P,N,C | |
3369 | do_z80_flags_op_and | |
3370 | ret | |
3371 | ||
3372 | ||
3373 | ;---------------------------------------------------------------- | |
3374 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3375 | ;---------------------------------------------------------------- | |
3376 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | | |
3377 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3378 | ;|OR s |**-P00|Logical inclusive OR |A=Avs | | |
3379 | ; | |
3380 | ; TODO: H-Flag | |
3381 | do_op_ora: | |
3382 | or z_a,opl | |
3383 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,H,P,N,C | |
3384 | do_z80_flags_op_or | |
3385 | ret | |
3386 | ||
3387 | ;---------------------------------------------------------------- | |
3388 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3389 | ;---------------------------------------------------------------- | |
3390 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | | |
3391 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3392 | ;|XOR s |**-P 0|Logical Exclusive OR |A=Axs | | |
3393 | ; | |
3394 | ; TODO: H-Flag | |
3395 | do_op_xora: | |
3396 | eor z_a,opl | |
3397 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,H,P,N,C | |
3398 | do_z80_flags_op_or | |
3399 | ret | |
3400 | ||
3401 | ;---------------------------------------------------------------- | |
3402 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3403 | ;---------------------------------------------------------------- | |
3404 | ;|ADD HL,ss |--?-0*|Add |HL=HL+ss | | |
3405 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3406 | ;|ADD HL,ss |---- *|Add |HL=HL+ss | | |
3407 | ; | |
3408 | ; | |
3409 | do_op_addhl: | |
3410 | add opl,z_l | |
3411 | adc oph,z_h | |
3412 | in temp,sreg | |
3413 | bmov z_flags,ZFL_H, temp,AVR_H | |
3414 | bmov z_flags,ZFL_C, temp,AVR_C | |
3415 | do_z80_flags_clear_N | |
3416 | ret | |
3417 | ||
3418 | ;---------------------------------------------------------------- | |
3419 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3420 | ;---------------------------------------------------------------- | |
3421 | ;|LD dst,src|------|Load |dst=src | | |
3422 | ; | |
3423 | ; | |
3424 | do_op_sthl: ;store hl to mem loc in opl:h | |
3425 | movw xl,opl | |
3426 | #if DRAM_WORD_ACCESS | |
3427 | movw temp,z_l | |
3428 | rcall memWriteWord | |
3429 | #else | |
3430 | mov temp,z_l | |
3431 | rcall memWriteByte | |
3432 | adiw xl,1 | |
3433 | mov temp,z_h | |
3434 | rcall memWriteByte | |
3435 | #endif | |
3436 | ret | |
3437 | ||
3438 | ;---------------------------------------------------------------- | |
3439 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3440 | ;---------------------------------------------------------------- | |
3441 | ;|LD dst,src|------|Load |dst=src | | |
3442 | ; | |
3443 | ; | |
3444 | do_op_rmem16: | |
3445 | movw xl,opl | |
3446 | #if DRAM_WORD_ACCESS | |
3447 | rcall memReadWord | |
3448 | movw opl,temp | |
3449 | #else | |
3450 | rcall memReadByte | |
3451 | mov opl,temp | |
3452 | adiw xl,1 | |
3453 | rcall memReadByte | |
3454 | mov oph,temp | |
3455 | #endif | |
3456 | ret | |
3457 | ||
3458 | ;---------------------------------------------------------------- | |
3459 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3460 | ;---------------------------------------------------------------- | |
3461 | ;|LD dst,src|------|Load |dst=src | | |
3462 | ; | |
3463 | ; | |
3464 | do_op_rmem8: | |
3465 | movw xl,opl | |
3466 | rcall memReadByte | |
3467 | mov opl,temp | |
3468 | ret | |
3469 | ||
3470 | ;---------------------------------------------------------------- | |
3471 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3472 | ;---------------------------------------------------------------- | |
3473 | ;|DAA |***P-*|Decimal Adjust Acc. | | | |
3474 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3475 | ; | |
3476 | ; Not yet checked | |
3477 | ||
3478 | ; Description (http://www.z80.info/z80syntx.htm#DAA): | |
3479 | ; This instruction conditionally adjusts the accumulator for BCD addition | |
3480 | ; and subtraction operations. For addition (ADD, ADC, INC) or subtraction | |
3481 | ; (SUB, SBC, DEC, NEC), the following table indicates the operation performed: | |
3482 | ; | |
3483 | ; ------------------------------------------------------------------------------- | |
3484 | ; | | C Flag | HEX value in | H Flag | HEX value in | Number | C flag| | |
3485 | ; | Operation| Before | upper digit | Before | lower digit | added | After | | |
3486 | ; | | DAA | (bit 7-4) | DAA | (bit 3-0) | to byte | DAA | | |
3487 | ; |-----------------------------------------------------------------------------| | |
3488 | ; | | 0 | 0-9 | 0 | 0-9 | 00 | 0 | | |
3489 | ; | ADD | 0 | 0-8 | 0 | A-F | 06 | 0 | | |
3490 | ; | | 0 | 0-9 | 1 | 0-3 | 06 | 0 | | |
3491 | ; | ADC | 0 | A-F | 0 | 0-9 | 60 | 1 | | |
3492 | ; | | 0 | 9-F | 0 | A-F | 66 | 1 | | |
3493 | ; | INC | 0 | A-F | 1 | 0-3 | 66 | 1 | | |
3494 | ; | | 1 | 0-2 | 0 | 0-9 | 60 | 1 | | |
3495 | ; | | 1 | 0-2 | 0 | A-F | 66 | 1 | | |
3496 | ; | | 1 | 0-3 | 1 | 0-3 | 66 | 1 | | |
3497 | ; |-----------------------------------------------------------------------------| | |
3498 | ; | SUB | 0 | 0-9 | 0 | 0-9 | 00 | 0 | | |
3499 | ; | SBC | 0 | 0-8 | 1 | 6-F | FA | 0 | | |
3500 | ; | DEC | 1 | 7-F | 0 | 0-9 | A0 | 1 | | |
3501 | ; | NEG | 1 | 6-F | 1 | 6-F | 9A | 1 | | |
3502 | ; |-----------------------------------------------------------------------------| | |
3503 | ; | |
3504 | ; Flags: | |
3505 | ; C: See instruction. | |
3506 | ; N: Unaffected. | |
3507 | ; P/V: Set if Acc. is even parity after operation, reset otherwise. | |
3508 | ; H: See instruction. | |
3509 | ; Z: Set if Acc. is Zero after operation, reset otherwise. | |
3510 | ; S: Set if most significant bit of Acc. is 1 after operation, reset otherwise. | |
3511 | ||
3512 | ||
3513 | ||
3514 | #if 1 | |
3515 | do_op_da: | |
3516 | ldi oph,0 ; what to add | |
3517 | sbrc z_flags,ZFL_H ; if H-Flag | |
3518 | rjmp op_da_06 | |
3519 | mov temp,opl | |
3520 | andi temp,0x0f ; ... or lower digit > 9 | |
3521 | cpi temp,0x0a | |
3522 | brlo op_da_06n | |
3523 | op_da_06: | |
3524 | ori oph,0x06 | |
3525 | op_da_06n: | |
3526 | sbrc z_flags,(1<<ZFL_C) | |
3527 | rjmp op_da_60 | |
3528 | cpi opl,0xa0 | |
3529 | brlo op_da_60n | |
3530 | op_da_60: | |
3531 | ori oph,0x60 | |
3532 | op_da_60n: | |
3533 | cpi opl,0x9a | |
3534 | brlo op_da_99n | |
3535 | ori z_flags,(1<<ZFL_C); set C | |
3536 | op_da_99n: | |
3537 | sbrs z_flags,ZFL_N ; if sub-op | |
3538 | rjmp op_da_add ; then | |
3539 | sub opl,oph | |
3540 | rjmp op_da_ex | |
3541 | op_da_add: ; else add-op | |
3542 | cpi opl,0x91 | |
3543 | brlo op_da_60n2 | |
3544 | mov temp,opl | |
3545 | andi temp,0x0f | |
3546 | cpi temp,0x0a | |
3547 | brlo op_da_60n2 | |
3548 | ori oph,0x60 | |
3549 | op_da_60n2: | |
3550 | add opl,oph | |
3551 | op_da_ex: | |
3552 | in temp,SREG | |
3553 | sbrc temp,AVR_H | |
3554 | ori z_flags,(1<<ZFL_C) | |
3555 | andi z_flags,(1<<ZFL_N)|(1<<ZFL_C) ; preserve C,N | |
3556 | ldpmx temp2, sz53p_tab, opl ; get S,Z,P | |
3557 | or z_flags,temp2 | |
3558 | bmov z_flags,ZFL_H, temp,AVR_H ; H (?) | |
3559 | ret | |
3560 | #else | |
3561 | ||
3562 | do_op_da: | |
3563 | sbrc z_flags,ZFL_N ; if add-op | |
3564 | rjmp do_op_da_sub ; then | |
3565 | ldi temp2,0 ; | |
3566 | mov temp,opl ; | |
3567 | andi temp,0x0f ; | |
3568 | cpi temp,0x0a ; if lower digit > 9 | |
3569 | brlo do_op_da_h ; | |
3570 | ori temp2,0x06 ; add 6 to lower digit | |
3571 | do_op_da_h: ; | |
3572 | sbrc z_flags,ZFL_H ; ... or H-Flag | |
3573 | ori temp2,0x06 ; | |
3574 | add opl,temp2 ; | |
3575 | ||
3576 | ldi temp2,0 ; | |
3577 | mov temp,opl ; | |
3578 | andi temp,0xf0 ; | |
3579 | cpi temp,0xa0 ; | |
3580 | brlo do_op_da_c ; | |
3581 | ori temp2,0x60 ; | |
3582 | do_op_da_c: ; else sub-op | |
3583 | sbrc z_flags,ZFL_C ; | |
3584 | ori temp2,0x60 ; | |
3585 | andi z_flags, ~( (1<<ZFL_S) | (1<<ZFL_Z) | (1<<ZFL_H) ) | |
3586 | add opl,temp2 ; | |
3587 | in temp,SREG ; | |
3588 | bst temp,AVR_Z ;Z-Flag | |
3589 | bld z_flags,ZFL_Z ; | |
3590 | bst temp,AVR_N ;S-Flag | |
3591 | bst z_flags,ZFL_S ; | |
3592 | sbrc temp2,5 ;C-Flag, set if 0x06 added | |
3593 | ori z_flags,(1<<ZFL_C) ; | |
3594 | ;H-Flag? | |
3595 | ret | |
3596 | ||
3597 | do_op_da_sub: ;TODO: | |
3598 | rcall do_op_inv | |
3599 | ret | |
3600 | #endif | |
3601 | ||
3602 | ;---------------------------------------------------------------- | |
3603 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3604 | ;---------------------------------------------------------------- | |
3605 | ;|SCF |--0-01|Set Carry Flag |CY=1 | | |
3606 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3607 | ; | |
3608 | ; | |
3609 | do_op_scf: | |
3610 | andi z_flags,~((1<<ZFL_H)|(1<<ZFL_N)) | |
3611 | ori z_flags,(1<<ZFL_C) | |
3612 | ret | |
3613 | ||
3614 | ;---------------------------------------------------------------- | |
3615 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3616 | ;---------------------------------------------------------------- | |
3617 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY | | |
3618 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3619 | ;|SCF |---- 1|Set Carry Flag |CY=1 | | |
3620 | ; | |
3621 | ;TODO: H-Flag | |
3622 | do_op_ccf: | |
3623 | do_z80_flags_clear_N | |
3624 | ldi temp,(1<<ZFL_C) | |
3625 | eor z_flags,temp | |
3626 | ret | |
3627 | ||
3628 | ;---------------------------------------------------------------- | |
3629 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3630 | ;---------------------------------------------------------------- | |
3631 | ;|CPL |--1-1-|Complement |A=~A | | |
3632 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
3633 | ;|CPL |---- -|Complement |A=~A | | |
3634 | ; | |
3635 | ; | |
3636 | do_op_cpl: | |
3637 | com z_a | |
3638 | do_z80_flags_set_HN | |
3639 | ret | |
3640 | ||
3641 | ||
3642 | ;---------------------------------------------------------------- | |
3643 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3644 | ;---------------------------------------------------------------- | |
3645 | ;|PUSH xx |------|Push |-[SP]=xx | | |
3646 | ;|PUSH qq |------|Push |-[SP]=qq | | |
3647 | ; | |
3648 | ; | |
3649 | do_op_push16: | |
3650 | movw xl,z_spl | |
3651 | subi xl,2 | |
3652 | sbci xh,0 | |
3653 | movw z_spl,xl | |
3654 | #if DRAM_WORD_ACCESS | |
3655 | movw temp,opl | |
3656 | rcall memWriteWord | |
3657 | #else | |
3658 | mov temp,opl | |
3659 | rcall memWriteByte | |
3660 | adiw xl,1 | |
3661 | mov temp,oph | |
3662 | rcall memWriteByte | |
3663 | #endif | |
3664 | ||
3665 | .if STACK_DBG | |
3666 | rcall printstr | |
3667 | .db "Stack push ",0 | |
3668 | mov temp,oph | |
3669 | rcall printhex | |
3670 | mov temp,opl | |
3671 | rcall printhex | |
3672 | rcall printstr | |
3673 | .db ", SP is now ",0 | |
3674 | mov temp,z_sph | |
3675 | rcall printhex | |
3676 | mov temp,z_spl | |
3677 | rcall printhex | |
3678 | rcall printstr | |
3679 | .db ".",13,0 | |
3680 | .endif | |
3681 | ||
3682 | ret | |
3683 | ||
3684 | ;---------------------------------------------------------------- | |
3685 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3686 | ;---------------------------------------------------------------- | |
3687 | ;|POP xx |------|Pop |xx=[SP]+ | | |
3688 | ;|POP qq |------|Pop |qq=[SP]+ | | |
3689 | ; | |
3690 | ; | |
3691 | do_op_pop16: | |
3692 | movw xl,z_spl | |
3693 | #if DRAM_WORD_ACCESS | |
3694 | rcall memReadWord | |
3695 | movw opl,temp | |
3696 | #else | |
3697 | rcall memReadByte | |
3698 | mov opl,temp | |
3699 | adiw xl,1 | |
3700 | rcall memReadByte | |
3701 | mov oph,temp | |
3702 | #endif | |
3703 | ||
3704 | ldi temp,2 | |
3705 | add z_spl,temp | |
3706 | adc z_sph,_0 | |
3707 | ||
3708 | ||
3709 | .if STACK_DBG | |
3710 | rcall printstr | |
3711 | .db "Stack pop: val ",0 | |
3712 | mov temp,oph | |
3713 | rcall printhex | |
3714 | mov temp,opl | |
3715 | rcall printhex | |
3716 | rcall printstr | |
3717 | .db ", SP is now",0 | |
3718 | mov temp,z_sph | |
3719 | rcall printhex | |
3720 | mov temp,z_spl | |
3721 | rcall printhex | |
3722 | rcall printstr | |
3723 | .db ".",13,0 | |
3724 | .endif | |
3725 | ret | |
3726 | ||
3727 | ;---------------------------------------------------------------- | |
3728 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3729 | ;---------------------------------------------------------------- | |
3730 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | | |
3731 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
3732 | ; | |
3733 | ; | |
3734 | do_op_exhl: | |
3735 | mov temp,z_h | |
3736 | mov z_h,oph | |
3737 | mov oph,temp | |
3738 | mov temp,z_l | |
3739 | mov z_l,opl | |
3740 | mov opl,temp | |
3741 | ret | |
3742 | ||
3743 | ;---------------------------------------------------------------- | |
3744 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3745 | ;---------------------------------------------------------------- | |
3746 | ; | |
3747 | ; TODO: Implement IFF1, IFF2 | |
3748 | do_op_di: | |
3749 | ret | |
3750 | ||
3751 | ;---------------------------------------------------------------- | |
3752 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3753 | ;---------------------------------------------------------------- | |
3754 | ; | |
3755 | ; TODO: Implement IFF1, IFF2 | |
3756 | do_op_ei: | |
3757 | ret | |
3758 | ||
3759 | ;---------------------------------------------------------------- | |
3760 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3761 | ;---------------------------------------------------------------- | |
3762 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
3763 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3764 | ;|RET cc |------|Conditional Return |If cc RET | | |
3765 | ; | |
3766 | ; | |
3767 | do_op_ifnz: | |
3768 | sbrs z_flags, ZFL_Z | |
3769 | ret | |
3770 | clr insdech | |
3771 | clr insdecl | |
3772 | ret | |
3773 | ||
3774 | ;---------------------------------------------------------------- | |
3775 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3776 | ;---------------------------------------------------------------- | |
3777 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
3778 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3779 | ;|RET cc |------|Conditional Return |If cc RET | | |
3780 | ; | |
3781 | ; | |
3782 | do_op_ifz: | |
3783 | sbrc z_flags, ZFL_Z | |
3784 | ret | |
3785 | clr insdech | |
3786 | clr insdecl | |
3787 | ret | |
3788 | ||
3789 | ;---------------------------------------------------------------- | |
3790 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3791 | ;---------------------------------------------------------------- | |
3792 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
3793 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3794 | ;|RET cc |------|Conditional Return |If cc RET | | |
3795 | ; | |
3796 | ; | |
3797 | do_op_ifnc: | |
3798 | sbrs z_flags, ZFL_C | |
3799 | ret | |
3800 | clr insdech | |
3801 | clr insdecl | |
3802 | ret | |
3803 | ||
3804 | ;---------------------------------------------------------------- | |
3805 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3806 | ;---------------------------------------------------------------- | |
3807 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
3808 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3809 | ;|RET cc |------|Conditional Return |If cc RET | | |
3810 | ; | |
3811 | ; | |
3812 | do_op_ifc: | |
3813 | sbrc z_flags, ZFL_C | |
3814 | ret | |
3815 | clr insdech | |
3816 | clr insdecl | |
3817 | ret | |
3818 | ||
3819 | ;---------------------------------------------------------------- | |
3820 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3821 | ;---------------------------------------------------------------- | |
3822 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
3823 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3824 | ;|RET cc |------|Conditional Return |If cc RET | | |
3825 | ; | |
3826 | ; | |
3827 | do_op_ifpo: | |
3828 | sbrs z_flags, ZFL_P | |
3829 | ret | |
3830 | clr insdech | |
3831 | clr insdecl | |
3832 | ret | |
3833 | ||
3834 | ;---------------------------------------------------------------- | |
3835 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3836 | ;---------------------------------------------------------------- | |
3837 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
3838 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3839 | ;|RET cc |------|Conditional Return |If cc RET | | |
3840 | ; | |
3841 | ; | |
3842 | do_op_ifpe: | |
3843 | sbrc z_flags, ZFL_P | |
3844 | ret | |
3845 | clr insdech | |
3846 | clr insdecl | |
3847 | ret | |
3848 | ||
3849 | ;---------------------------------------------------------------- | |
3850 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3851 | ;---------------------------------------------------------------- | |
3852 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
3853 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3854 | ;|RET cc |------|Conditional Return |If cc RET | | |
3855 | ; | |
3856 | ; | |
3857 | do_op_ifp: ;sign positive, aka s=0 | |
3858 | sbrs z_flags, ZFL_S | |
3859 | ret | |
3860 | clr insdech | |
3861 | clr insdecl | |
3862 | ret | |
3863 | ||
3864 | ;---------------------------------------------------------------- | |
3865 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3866 | ;---------------------------------------------------------------- | |
3867 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
3868 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
3869 | ;|RET cc |------|Conditional Return |If cc RET | | |
3870 | ; | |
3871 | ; | |
3872 | do_op_ifm: ;sign negative, aka s=1 | |
3873 | sbrc z_flags, ZFL_S | |
3874 | ret | |
3875 | clr insdech | |
3876 | clr insdecl | |
3877 | ret | |
3878 | ||
3879 | ;---------------------------------------------------------------- | |
3880 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3881 | ;---------------------------------------------------------------- | |
3882 | ;|OUT [n],A |------|Output |[n]=A | | |
3883 | ; | |
3884 | ; | |
3885 | ;Interface with peripherials goes here :) | |
3886 | do_op_outa: ; out (opl),a | |
3887 | .if PORT_DEBUG | |
3888 | rcall printstr | |
3889 | .db 13,"Port write: ",0 | |
3890 | mov temp,z_a | |
3891 | rcall printhex | |
3892 | rcall printstr | |
3893 | .db " -> (",0 | |
3894 | mov temp,opl | |
3895 | rcall printhex | |
3896 | rcall printstr | |
3897 | .db ")",13,0 | |
3898 | .endif | |
3899 | mov temp,z_a | |
3900 | mov temp2,opl | |
3901 | rcall portWrite | |
3902 | ret | |
3903 | ||
3904 | ;---------------------------------------------------------------- | |
3905 | ;|Mnemonic |SZHPNC|Description |Notes | | |
3906 | ;---------------------------------------------------------------- | |
3907 | ;|IN A,[n] |------|Input |A=[n] | | |
3908 | ; | |
3909 | ; | |
3910 | do_op_in: ; in a,(opl) | |
3911 | .if PORT_DEBUG | |
3912 | rcall printstr | |
3913 | .db 13,"Port read: (",0 | |
3914 | mov temp,opl | |
3915 | rcall printhex | |
3916 | rcall printstr | |
3917 | .db ") -> ",0 | |
3918 | .endif | |
3919 | ||
3920 | mov temp2,opl | |
3921 | rcall portRead | |
3922 | mov opl,temp | |
3923 | ||
3924 | .if PORT_DEBUG | |
3925 | rcall printhex | |
3926 | rcall printstr | |
3927 | .db 13,0 | |
3928 | .endif | |
3929 | ret | |
3930 | ||
3931 | ||
3932 | ;---------------------------------------------------------------- | |
3933 | do_op_inv: | |
3934 | rcall printstr | |
3935 | .db "Invalid opcode @ PC=",0,0 | |
3936 | mov temp,z_pch | |
3937 | rcall printhex | |
3938 | mov temp,z_pcl | |
3939 | rcall printhex | |
3940 | ||
3941 | ;---------------------------------------------------------------- | |
3942 | haltinv: | |
3943 | rjmp haltinv | |
3944 | ||
3945 | ;---------------------------------------------------------------- | |
3946 | ; Lookup table, stolen from z80ex, Z80 emulation library. | |
3947 | ; http://z80ex.sourceforge.net/ | |
3948 | ||
3949 | ; The S, Z, 5 and 3 bits and the parity of the lookup value | |
3950 | .org (PC+255) & 0xff00 | |
3951 | sz53p_tab: | |
3952 | .db 0x44,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
3953 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
3954 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
3955 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
3956 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
3957 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
3958 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
3959 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
3960 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
3961 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
3962 | .db 0x04,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
3963 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
3964 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
3965 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
3966 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
3967 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
3968 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
3969 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
3970 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
3971 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
3972 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
3973 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
3974 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
3975 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
3976 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
3977 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
3978 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
3979 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
3980 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
3981 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
3982 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
3983 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
3984 | ||
3985 | ||
3986 | ; ----------------------- Opcode decoding ------------------------- | |
3987 | ||
3988 | ; Lookup table for Z80 opcodes. Translates the first byte of the instruction word into three | |
3989 | ; operations: fetch, do something, store. | |
3990 | ; The table is made of 256 words. These 16-bit words consist of | |
3991 | ; the fetch operation (bit 0-4), the processing operation (bit 10-16) and the store | |
3992 | ; operation (bit 5-9). | |
3993 | .org (PC+255) & 0xff00 | |
3994 | inst_table: | |
3995 | .dw (FETCH_NOP | OP_NOP | STORE_NOP) ; 00 NOP | |
3996 | .dw (FETCH_DIR16| OP_NOP | STORE_BC ) ; 01 nn nn LD BC,nn | |
3997 | .dw (FETCH_A | OP_NOP | STORE_MBC) ; 02 LD (BC),A | |
3998 | .dw (FETCH_BC | OP_INC16 | STORE_BC ) ; 03 INC BC | |
3999 | .dw (FETCH_B | OP_INC | STORE_B ) ; 04 INC B | |
4000 | .dw (FETCH_B | OP_DEC | STORE_B ) ; 05 DEC B | |
4001 | .dw (FETCH_DIR8 | OP_NOP | STORE_B ) ; 06 nn LD B,n | |
4002 | .dw (FETCH_A | OP_RLC | STORE_A ) ; 07 RLCA | |
4003 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 08 EX AF,AF' (Z80) | |
4004 | .dw (FETCH_BC | OP_ADDHL | STORE_HL ) ; 09 ADD HL,BC | |
4005 | .dw (FETCH_MBC | OP_NOP | STORE_A ) ; 0A LD A,(BC) | |
4006 | .dw (FETCH_BC | OP_DEC16 | STORE_BC ) ; 0B DEC BC | |
4007 | .dw (FETCH_C | OP_INC | STORE_C ) ; 0C INC C | |
4008 | .dw (FETCH_C | OP_DEC | STORE_C ) ; 0D DEC C | |
4009 | .dw (FETCH_DIR8 | OP_NOP | STORE_C ) ; 0E nn LD C,n | |
4010 | .dw (FETCH_A | OP_RRC | STORE_A ) ; 0F RRCA | |
4011 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 10 oo DJNZ o (Z80) | |
4012 | .dw (FETCH_DIR16| OP_NOP | STORE_DE ) ; 11 nn nn LD DE,nn | |
4013 | .dw (FETCH_A | OP_NOP | STORE_MDE) ; 12 LD (DE),A | |
4014 | .dw (FETCH_DE | OP_INC16 | STORE_DE ) ; 13 INC DE | |
4015 | .dw (FETCH_D | OP_INC | STORE_D ) ; 14 INC D | |
4016 | .dw (FETCH_D | OP_DEC | STORE_D ) ; 15 DEC D | |
4017 | .dw (FETCH_DIR8 | OP_NOP | STORE_D ) ; 16 nn LD D,n | |
4018 | .dw (FETCH_A | OP_RL | STORE_A ) ; 17 RLA | |
4019 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 18 oo JR o (Z80) | |
4020 | .dw (FETCH_DE | OP_ADDHL | STORE_HL ) ; 19 ADD HL,DE | |
4021 | .dw (FETCH_MDE | OP_NOP | STORE_A ) ; 1A LD A,(DE) | |
4022 | .dw (FETCH_DE | OP_DEC16 | STORE_DE ) ; 1B DEC DE | |
4023 | .dw (FETCH_E | OP_INC | STORE_E ) ; 1C INC E | |
4024 | .dw (FETCH_E | OP_DEC | STORE_E ) ; 1D DEC E | |
4025 | .dw (FETCH_DIR8 | OP_NOP | STORE_E ) ; 1E nn LD E,n | |
4026 | .dw (FETCH_A | OP_RR | STORE_A ) ; 1F RRA | |
4027 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 20 oo JR NZ,o (Z80) | |
4028 | .dw (FETCH_DIR16| OP_NOP | STORE_HL ) ; 21 nn nn LD HL,nn | |
4029 | .dw (FETCH_DIR16| OP_STHL | STORE_NOP) ; 22 nn nn LD (nn),HL | |
4030 | .dw (FETCH_HL | OP_INC16 | STORE_HL ) ; 23 INC HL | |
4031 | .dw (FETCH_H | OP_INC | STORE_H ) ; 24 INC H | |
4032 | .dw (FETCH_H | OP_DEC | STORE_H ) ; 25 DEC H | |
4033 | .dw (FETCH_DIR8 | OP_NOP | STORE_H ) ; 26 nn LD H,n | |
4034 | .dw (FETCH_A | OP_DA | STORE_A ) ; 27 DAA | |
4035 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 28 oo JR Z,o (Z80) | |
4036 | .dw (FETCH_HL | OP_ADDHL | STORE_HL ) ; 29 ADD HL,HL | |
4037 | .dw (FETCH_DIR16| OP_RMEM16 | STORE_HL ) ; 2A nn nn LD HL,(nn) | |
4038 | .dw (FETCH_HL | OP_DEC16 | STORE_HL ) ; 2B DEC HL | |
4039 | .dw (FETCH_L | OP_INC | STORE_L ) ; 2C INC L | |
4040 | .dw (FETCH_L | OP_DEC | STORE_L ) ; 2D DEC L | |
4041 | .dw (FETCH_DIR8 | OP_NOP | STORE_L ) ; 2E nn LD L,n | |
4042 | .dw (FETCH_NOP | OP_CPL | STORE_NOP) ; 2F CPL | |
4043 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 30 oo JR NC,o (Z80) | |
4044 | .dw (FETCH_DIR16| OP_NOP | STORE_SP ) ; 31 nn nn LD SP,nn | |
4045 | .dw (FETCH_DIR16| OP_NOP | STORE_AM ) ; 32 nn nn LD (nn),A | |
4046 | .dw (FETCH_SP | OP_INC16 | STORE_SP ) ; 33 INC SP | |
4047 | .dw (FETCH_MHL | OP_INC | STORE_MHL) ; 34 INC (HL) | |
4048 | .dw (FETCH_MHL | OP_DEC | STORE_MHL) ; 35 DEC (HL) | |
4049 | .dw (FETCH_DIR8 | OP_NOP | STORE_MHL) ; 36 nn LD (HL),n | |
4050 | .dw (FETCH_NOP | OP_SCF | STORE_NOP) ; 37 SCF | |
4051 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; 38 oo JR C,o (Z80) | |
4052 | .dw (FETCH_SP | OP_ADDHL | STORE_HL ) ; 39 ADD HL,SP | |
4053 | .dw (FETCH_DIR16| OP_RMEM8 | STORE_A ) ; 3A nn nn LD A,(nn) | |
4054 | .dw (FETCH_SP | OP_DEC16 | STORE_SP ) ; 3B DEC SP | |
4055 | .dw (FETCH_NOP | OP_INCA | STORE_NOP) ; 3C INC A | |
4056 | .dw (FETCH_NOP | OP_DECA | STORE_NOP) ; 3D DEC A | |
4057 | .dw (FETCH_DIR8 | OP_NOP | STORE_A ) ; 3E nn LD A,n | |
4058 | .dw (FETCH_NOP | OP_CCF | STORE_NOP) ; 3F CCF (Complement Carry Flag, gvd) | |
4059 | .dw (FETCH_B | OP_NOP | STORE_B ) ; 40 LD B,r | |
4060 | .dw (FETCH_C | OP_NOP | STORE_B ) ; 41 LD B,r | |
4061 | .dw (FETCH_D | OP_NOP | STORE_B ) ; 42 LD B,r | |
4062 | .dw (FETCH_E | OP_NOP | STORE_B ) ; 43 LD B,r | |
4063 | .dw (FETCH_H | OP_NOP | STORE_B ) ; 44 LD B,r | |
4064 | .dw (FETCH_L | OP_NOP | STORE_B ) ; 45 LD B,r | |
4065 | .dw (FETCH_MHL | OP_NOP | STORE_B ) ; 46 LD B,r | |
4066 | .dw (FETCH_A | OP_NOP | STORE_B ) ; 47 LD B,r | |
4067 | .dw (FETCH_B | OP_NOP | STORE_C ) ; 48 LD C,r | |
4068 | .dw (FETCH_C | OP_NOP | STORE_C ) ; 49 LD C,r | |
4069 | .dw (FETCH_D | OP_NOP | STORE_C ) ; 4A LD C,r | |
4070 | .dw (FETCH_E | OP_NOP | STORE_C ) ; 4B LD C,r | |
4071 | .dw (FETCH_H | OP_NOP | STORE_C ) ; 4C LD C,r | |
4072 | .dw (FETCH_L | OP_NOP | STORE_C ) ; 4D LD C,r | |
4073 | .dw (FETCH_MHL | OP_NOP | STORE_C ) ; 4E LD C,r | |
4074 | .dw (FETCH_A | OP_NOP | STORE_C ) ; 4F LD C,r | |
4075 | .dw (FETCH_B | OP_NOP | STORE_D ) ; 50 LD D,r | |
4076 | .dw (FETCH_C | OP_NOP | STORE_D ) ; 51 LD D,r | |
4077 | .dw (FETCH_D | OP_NOP | STORE_D ) ; 52 LD D,r | |
4078 | .dw (FETCH_E | OP_NOP | STORE_D ) ; 53 LD D,r | |
4079 | .dw (FETCH_H | OP_NOP | STORE_D ) ; 54 LD D,r | |
4080 | .dw (FETCH_L | OP_NOP | STORE_D ) ; 55 LD D,r | |
4081 | .dw (FETCH_MHL | OP_NOP | STORE_D ) ; 56 LD D,r | |
4082 | .dw (FETCH_A | OP_NOP | STORE_D ) ; 57 LD D,r | |
4083 | .dw (FETCH_B | OP_NOP | STORE_E ) ; 58 LD E,r | |
4084 | .dw (FETCH_C | OP_NOP | STORE_E ) ; 59 LD E,r | |
4085 | .dw (FETCH_D | OP_NOP | STORE_E ) ; 5A LD E,r | |
4086 | .dw (FETCH_E | OP_NOP | STORE_E ) ; 5B LD E,r | |
4087 | .dw (FETCH_H | OP_NOP | STORE_E ) ; 5C LD E,r | |
4088 | .dw (FETCH_L | OP_NOP | STORE_E ) ; 5D LD E,r | |
4089 | .dw (FETCH_MHL | OP_NOP | STORE_E ) ; 5E LD E,r | |
4090 | .dw (FETCH_A | OP_NOP | STORE_E ) ; 5F LD E,r | |
4091 | .dw (FETCH_B | OP_NOP | STORE_H ) ; 60 LD H,r | |
4092 | .dw (FETCH_C | OP_NOP | STORE_H ) ; 61 LD H,r | |
4093 | .dw (FETCH_D | OP_NOP | STORE_H ) ; 62 LD H,r | |
4094 | .dw (FETCH_E | OP_NOP | STORE_H ) ; 63 LD H,r | |
4095 | .dw (FETCH_H | OP_NOP | STORE_H ) ; 64 LD H,r | |
4096 | .dw (FETCH_L | OP_NOP | STORE_H ) ; 65 LD H,r | |
4097 | .dw (FETCH_MHL | OP_NOP | STORE_H ) ; 66 LD H,r | |
4098 | .dw (FETCH_A | OP_NOP | STORE_H ) ; 67 LD H,r | |
4099 | .dw (FETCH_B | OP_NOP | STORE_L ) ; 68 LD L,r | |
4100 | .dw (FETCH_C | OP_NOP | STORE_L ) ; 69 LD L,r | |
4101 | .dw (FETCH_D | OP_NOP | STORE_L ) ; 6A LD L,r | |
4102 | .dw (FETCH_E | OP_NOP | STORE_L ) ; 6B LD L,r | |
4103 | .dw (FETCH_H | OP_NOP | STORE_L ) ; 6C LD L,r | |
4104 | .dw (FETCH_L | OP_NOP | STORE_L ) ; 6D LD L,r | |
4105 | .dw (FETCH_MHL | OP_NOP | STORE_L ) ; 6E LD L,r | |
4106 | .dw (FETCH_A | OP_NOP | STORE_L ) ; 6F LD L,r | |
4107 | .dw (FETCH_B | OP_NOP | STORE_MHL) ; 70 LD (HL),r | |
4108 | .dw (FETCH_C | OP_NOP | STORE_MHL) ; 71 LD (HL),r | |
4109 | .dw (FETCH_D | OP_NOP | STORE_MHL) ; 72 LD (HL),r | |
4110 | .dw (FETCH_E | OP_NOP | STORE_MHL) ; 73 LD (HL),r | |
4111 | .dw (FETCH_H | OP_NOP | STORE_MHL) ; 74 LD (HL),r | |
4112 | .dw (FETCH_L | OP_NOP | STORE_MHL) ; 75 LD (HL),r | |
4113 | .dw (FETCH_NOP | OP_NOP | STORE_NOP) ; 76 HALT | |
4114 | .dw (FETCH_A | OP_NOP | STORE_MHL) ; 77 LD (HL),r | |
4115 | .dw (FETCH_B | OP_NOP | STORE_A ) ; 78 LD A,r | |
4116 | .dw (FETCH_C | OP_NOP | STORE_A ) ; 79 LD A,r | |
4117 | .dw (FETCH_D | OP_NOP | STORE_A ) ; 7A LD A,r | |
4118 | .dw (FETCH_E | OP_NOP | STORE_A ) ; 7B LD A,r | |
4119 | .dw (FETCH_H | OP_NOP | STORE_A ) ; 7C LD A,r | |
4120 | .dw (FETCH_L | OP_NOP | STORE_A ) ; 7D LD A,r | |
4121 | .dw (FETCH_MHL | OP_NOP | STORE_A ) ; 7E LD A,r | |
4122 | .dw (FETCH_A | OP_NOP | STORE_A ) ; 7F LD A,r | |
4123 | .dw (FETCH_B | OP_ADDA | STORE_NOP) ; 80 ADD A,r | |
4124 | .dw (FETCH_C | OP_ADDA | STORE_NOP) ; 81 ADD A,r | |
4125 | .dw (FETCH_D | OP_ADDA | STORE_NOP) ; 82 ADD A,r | |
4126 | .dw (FETCH_E | OP_ADDA | STORE_NOP) ; 83 ADD A,r | |
4127 | .dw (FETCH_H | OP_ADDA | STORE_NOP) ; 84 ADD A,r | |
4128 | .dw (FETCH_L | OP_ADDA | STORE_NOP) ; 85 ADD A,r | |
4129 | .dw (FETCH_MHL | OP_ADDA | STORE_NOP) ; 86 ADD A,r | |
4130 | .dw (FETCH_A | OP_ADDA | STORE_NOP) ; 87 ADD A,r | |
4131 | .dw (FETCH_B | OP_ADCA | STORE_NOP) ; 88 ADC A,r | |
4132 | .dw (FETCH_C | OP_ADCA | STORE_NOP) ; 89 ADC A,r | |
4133 | .dw (FETCH_D | OP_ADCA | STORE_NOP) ; 8A ADC A,r | |
4134 | .dw (FETCH_E | OP_ADCA | STORE_NOP) ; 8B ADC A,r | |
4135 | .dw (FETCH_H | OP_ADCA | STORE_NOP) ; 8C ADC A,r | |
4136 | .dw (FETCH_L | OP_ADCA | STORE_NOP) ; 8D ADC A,r | |
4137 | .dw (FETCH_MHL | OP_ADCA | STORE_NOP) ; 8E ADC A,r | |
4138 | .dw (FETCH_A | OP_ADCA | STORE_NOP) ; 8F ADC A,r | |
4139 | .dw (FETCH_B | OP_SUBFA | STORE_NOP) ; 90 SUB A,r | |
4140 | .dw (FETCH_C | OP_SUBFA | STORE_NOP) ; 91 SUB A,r | |
4141 | .dw (FETCH_D | OP_SUBFA | STORE_NOP) ; 92 SUB A,r | |
4142 | .dw (FETCH_E | OP_SUBFA | STORE_NOP) ; 93 SUB A,r | |
4143 | .dw (FETCH_H | OP_SUBFA | STORE_NOP) ; 94 SUB A,r | |
4144 | .dw (FETCH_L | OP_SUBFA | STORE_NOP) ; 95 SUB A,r | |
4145 | .dw (FETCH_MHL | OP_SUBFA | STORE_NOP) ; 96 SUB A,r | |
4146 | .dw (FETCH_A | OP_SUBFA | STORE_NOP) ; 97 SUB A,r | |
4147 | .dw (FETCH_B | OP_SBCFA | STORE_NOP) ; 98 SBC A,r | |
4148 | .dw (FETCH_C | OP_SBCFA | STORE_NOP) ; 99 SBC A,r | |
4149 | .dw (FETCH_D | OP_SBCFA | STORE_NOP) ; 9A SBC A,r | |
4150 | .dw (FETCH_E | OP_SBCFA | STORE_NOP) ; 9B SBC A,r | |
4151 | .dw (FETCH_H | OP_SBCFA | STORE_NOP) ; 9C SBC A,r | |
4152 | .dw (FETCH_L | OP_SBCFA | STORE_NOP) ; 9D SBC A,r | |
4153 | .dw (FETCH_MHL | OP_SBCFA | STORE_NOP) ; 9E SBC A,r | |
4154 | .dw (FETCH_A | OP_SBCFA | STORE_NOP) ; 9F SBC A,r | |
4155 | .dw (FETCH_B | OP_ANDA | STORE_NOP) ; A0 AND A,r | |
4156 | .dw (FETCH_C | OP_ANDA | STORE_NOP) ; A1 AND A,r | |
4157 | .dw (FETCH_D | OP_ANDA | STORE_NOP) ; A2 AND A,r | |
4158 | .dw (FETCH_E | OP_ANDA | STORE_NOP) ; A3 AND A,r | |
4159 | .dw (FETCH_H | OP_ANDA | STORE_NOP) ; A4 AND A,r | |
4160 | .dw (FETCH_L | OP_ANDA | STORE_NOP) ; A5 AND A,r | |
4161 | .dw (FETCH_MHL | OP_ANDA | STORE_NOP) ; A6 AND A,r | |
4162 | .dw (FETCH_A | OP_ANDA | STORE_NOP) ; A7 AND A,r | |
4163 | .dw (FETCH_B | OP_XORA | STORE_NOP) ; A8 XOR A,r | |
4164 | .dw (FETCH_C | OP_XORA | STORE_NOP) ; A9 XOR A,r | |
4165 | .dw (FETCH_D | OP_XORA | STORE_NOP) ; AA XOR A,r | |
4166 | .dw (FETCH_E | OP_XORA | STORE_NOP) ; AB XOR A,r | |
4167 | .dw (FETCH_H | OP_XORA | STORE_NOP) ; AC XOR A,r | |
4168 | .dw (FETCH_L | OP_XORA | STORE_NOP) ; AD XOR A,r | |
4169 | .dw (FETCH_MHL | OP_XORA | STORE_NOP) ; AE XOR A,r | |
4170 | .dw (FETCH_A | OP_XORA | STORE_NOP) ; AF XOR A,r | |
4171 | .dw (FETCH_B | OP_ORA | STORE_NOP) ; B0 OR A,r | |
4172 | .dw (FETCH_C | OP_ORA | STORE_NOP) ; B1 OR A,r | |
4173 | .dw (FETCH_D | OP_ORA | STORE_NOP) ; B2 OR A,r | |
4174 | .dw (FETCH_E | OP_ORA | STORE_NOP) ; B3 OR A,r | |
4175 | .dw (FETCH_H | OP_ORA | STORE_NOP) ; B4 OR A,r | |
4176 | .dw (FETCH_L | OP_ORA | STORE_NOP) ; B5 OR A,r | |
4177 | .dw (FETCH_MHL | OP_ORA | STORE_NOP) ; B6 OR A,r | |
4178 | .dw (FETCH_A | OP_ORA | STORE_NOP) ; B7 OR A,r | |
4179 | .dw (FETCH_B | OP_CPFA | STORE_NOP) ; B8 CP A,r | |
4180 | .dw (FETCH_C | OP_CPFA | STORE_NOP) ; B9 CP A,r | |
4181 | .dw (FETCH_D | OP_CPFA | STORE_NOP) ; BA CP A,r | |
4182 | .dw (FETCH_E | OP_CPFA | STORE_NOP) ; BB CP A,r | |
4183 | .dw (FETCH_H | OP_CPFA | STORE_NOP) ; BC CP A,r | |
4184 | .dw (FETCH_L | OP_CPFA | STORE_NOP) ; BD CP A,r | |
4185 | .dw (FETCH_MHL | OP_CPFA | STORE_NOP) ; BE CP A,r | |
4186 | .dw (FETCH_A | OP_CPFA | STORE_NOP) ; BF CP A,r | |
4187 | .dw (FETCH_NOP | OP_IFNZ | STORE_RET) ; C0 RET NZ | |
4188 | .dw (FETCH_NOP | OP_POP16 | STORE_BC ) ; C1 POP BC | |
4189 | .dw (FETCH_DIR16| OP_IFNZ | STORE_PC ) ; C2 nn nn JP NZ,nn | |
4190 | .dw (FETCH_DIR16| OP_NOP | STORE_PC ) ; C3 nn nn JP nn | |
4191 | .dw (FETCH_DIR16| OP_IFNZ | STORE_CALL) ; C4 nn nn CALL NZ,nn | |
4192 | .dw (FETCH_BC | OP_PUSH16 | STORE_NOP) ; C5 PUSH BC | |
4193 | .dw (FETCH_DIR8 | OP_ADDA | STORE_NOP) ; C6 nn ADD A,n | |
4194 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; C7 RST 0 | |
4195 | .dw (FETCH_NOP | OP_IFZ | STORE_RET) ; C8 RET Z | |
4196 | .dw (FETCH_NOP | OP_NOP | STORE_RET) ; C9 RET | |
4197 | .dw (FETCH_DIR16| OP_IFZ | STORE_PC ) ; CA nn nn JP Z,nn | |
4198 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; CB (Z80 specific) | |
4199 | .dw (FETCH_DIR16| OP_IFZ | STORE_CALL) ; CC nn nn CALL Z,nn | |
4200 | .dw (FETCH_DIR16| OP_NOP | STORE_CALL) ; CD nn nn CALL nn | |
4201 | .dw (FETCH_DIR8 | OP_ADCA | STORE_NOP) ; CE nn ADC A,n | |
4202 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; CF RST 8H | |
4203 | .dw (FETCH_NOP | OP_IFNC | STORE_RET) ; D0 RET NC | |
4204 | .dw (FETCH_NOP | OP_POP16 | STORE_DE ) ; D1 POP DE | |
4205 | .dw (FETCH_DIR16| OP_IFNC | STORE_PC ) ; D2 nn nn JP NC,nn | |
4206 | .dw (FETCH_DIR8 | OP_OUTA | STORE_NOP) ; D3 nn OUT (n),A | |
4207 | .dw (FETCH_DIR16| OP_IFNC | STORE_CALL) ; D4 nn nn CALL NC,nn | |
4208 | .dw (FETCH_DE | OP_PUSH16 | STORE_NOP) ; D5 PUSH DE | |
4209 | .dw (FETCH_DIR8 | OP_SUBFA | STORE_NOP) ; D6 nn SUB n | |
4210 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; D7 RST 10H | |
4211 | .dw (FETCH_NOP | OP_IFC | STORE_RET) ; D8 RET C | |
4212 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; D9 EXX (Z80) | |
4213 | .dw (FETCH_DIR16| OP_IFC | STORE_PC ) ; DA nn nn JP C,nn | |
4214 | .dw (FETCH_DIR8 | OP_IN | STORE_A ) ; DB nn IN A,(n) | |
4215 | .dw (FETCH_DIR16| OP_IFC | STORE_CALL) ; DC nn nn CALL C,nn | |
4216 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; DD (Z80) | |
4217 | .dw (FETCH_DIR8 | OP_SBCFA | STORE_NOP) ; DE nn SBC A,n | |
4218 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; DF RST 18H | |
4219 | .dw (FETCH_NOP | OP_IFPO | STORE_RET) ; E0 RET PO | |
4220 | .dw (FETCH_NOP | OP_POP16 | STORE_HL ) ; E1 POP HL | |
4221 | .dw (FETCH_DIR16| OP_IFPO | STORE_PC ) ; E2 nn nn JP PO,nn | |
4222 | .dw (FETCH_MSP | OP_EXHL | STORE_MSP) ; E3 EX (SP),HL | |
4223 | .dw (FETCH_DIR16| OP_IFPO | STORE_CALL) ; E4 nn nn CALL PO,nn | |
4224 | .dw (FETCH_HL | OP_PUSH16 | STORE_NOP) ; E5 PUSH HL | |
4225 | .dw (FETCH_DIR8 | OP_ANDA | STORE_NOP) ; E6 nn AND n | |
4226 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; E7 RST 20H | |
4227 | .dw (FETCH_NOP | OP_IFPE | STORE_RET) ; E8 RET PE | |
4228 | .dw (FETCH_HL | OP_NOP | STORE_PC ) ; E9 JP (HL) | |
4229 | .dw (FETCH_DIR16| OP_IFPE | STORE_PC ) ; EA nn nn JP PE,nn | |
4230 | .dw (FETCH_DE | OP_EXHL | STORE_DE ) ; EB EX DE,HL | |
4231 | .dw (FETCH_DIR16| OP_IFPE | STORE_CALL) ; EC nn nn CALL PE,nn | |
4232 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; ED (Z80 specific) | |
4233 | .dw (FETCH_DIR8 | OP_XORA | STORE_NOP) ; EE nn XOR n | |
4234 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; EF RST 28H | |
4235 | .dw (FETCH_NOP | OP_IFP | STORE_RET) ; F0 RET P | |
4236 | .dw (FETCH_NOP | OP_POP16 | STORE_AF ) ; F1 POP AF | |
4237 | .dw (FETCH_DIR16| OP_IFP | STORE_PC ) ; F2 nn nn JP P,nn | |
4238 | .dw (FETCH_NOP | OP_DI | STORE_NOP) ; F3 DI | |
4239 | .dw (FETCH_DIR16| OP_IFP | STORE_CALL) ; F4 nn nn CALL P,nn | |
4240 | .dw (FETCH_AF | OP_PUSH16 | STORE_NOP) ; F5 PUSH AF | |
4241 | .dw (FETCH_DIR8 | OP_ORA | STORE_NOP) ; F6 nn OR n | |
4242 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; F7 RST 30H | |
4243 | .dw (FETCH_NOP | OP_IFM | STORE_RET) ; F8 RET M | |
4244 | .dw (FETCH_HL | OP_NOP | STORE_SP ) ; F9 LD SP,HL | |
4245 | .dw (FETCH_DIR16| OP_IFM | STORE_PC ) ; FA nn nn JP M,nn | |
4246 | .dw (FETCH_NOP | OP_EI | STORE_NOP) ; FB EI | |
4247 | .dw (FETCH_DIR16| OP_IFM | STORE_CALL) ; FC nn nn CALL M,nn | |
4248 | .dw (FETCH_NOP | OP_INV | STORE_NOP) ; FD (Z80 specific) | |
4249 | .dw (FETCH_DIR8 | OP_CPFA | STORE_NOP) ; FE nn CP n | |
4250 | .dw (FETCH_RST | OP_NOP | STORE_CALL) ; FF RST 38H | |
4251 | ||
4252 | ; vim:set ts=8 noet nowrap |