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bugfix + some tweaks
[picodrive.git] / pico / sound / sound.c
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1// This is part of Pico Library\r
2\r
3// (c) Copyright 2004 Dave, All rights reserved.\r
4// (c) Copyright 2006,2007 notaz, All rights reserved.\r
5// Free for non-commercial use.\r
6\r
7// For commercial use, separate licencing terms must be obtained.\r
8\r
9\r
10#include <string.h>\r
11#include "ym2612.h"\r
12#include "sn76496.h"\r
13#include "../pico_int.h"\r
14#include "../cd/pcm.h"\r
15#include "mix.h"\r
16\r
17void (*PsndMix_32_to_16l)(short *dest, int *src, int count) = mix_32_to_16l_stereo;\r
18\r
19// master int buffer to mix to\r
20static int PsndBuffer[2*44100/50];\r
21\r
22// dac\r
23static unsigned short dac_info[312+4]; // pppppppp ppppllll, p - pos in buff, l - length to write for this sample\r
24\r
25// cdda output buffer\r
26short cdda_out_buffer[2*1152];\r
27\r
28// for Pico\r
29int PsndRate=0;\r
30int PsndLen=0; // number of mono samples, multiply by 2 for stereo\r
31int PsndLen_exc_add=0; // this is for non-integer sample counts per line, eg. 22050/60\r
32int PsndLen_exc_cnt=0;\r
33int PsndDacLine=0;\r
34short *PsndOut=NULL; // PCM data buffer\r
35\r
36// timers\r
37int timer_a_next_oflow, timer_a_step; // in z80 cycles\r
38int timer_b_next_oflow, timer_b_step;\r
39\r
40// sn76496\r
41extern int *sn76496_regs;\r
42\r
43\r
44static void dac_recalculate(void)\r
45{\r
46 int i, dac_cnt, pos, len, lines = Pico.m.pal ? 312 : 262, mid = Pico.m.pal ? 68 : 93;\r
47\r
48 if (PsndLen <= lines)\r
49 {\r
50 // shrinking algo\r
51 dac_cnt = -PsndLen;\r
52 len=1; pos=0;\r
53 dac_info[225] = 1;\r
54\r
55 for(i=226; i != 225; i++)\r
56 {\r
57 if (i >= lines) i = 0;\r
58 len = 0;\r
59 if(dac_cnt < 0) {\r
60 len=1;\r
61 pos++;\r
62 dac_cnt += lines;\r
63 }\r
64 dac_cnt -= PsndLen;\r
65 dac_info[i] = (pos<<4)|len;\r
66 }\r
67 }\r
68 else\r
69 {\r
70 // stretching\r
71 dac_cnt = PsndLen;\r
72 pos=0;\r
73 for(i = 225; i != 224; i++)\r
74 {\r
75 if (i >= lines) i = 0;\r
76 len=0;\r
77 while(dac_cnt >= 0) {\r
78 dac_cnt -= lines;\r
79 len++;\r
80 }\r
81 if (i == mid) // midpoint\r
82 while(pos+len < PsndLen/2) {\r
83 dac_cnt -= lines;\r
84 len++;\r
85 }\r
86 dac_cnt += PsndLen;\r
87 dac_info[i] = (pos<<4)|len;\r
88 pos+=len;\r
89 }\r
90 // last sample\r
91 for(len = 0, i = pos; i < PsndLen; i++) len++;\r
92 if (PsndLen_exc_add) len++;\r
93 dac_info[224] = (pos<<4)|len;\r
94 }\r
95 mid = (dac_info[lines-1] & 0xfff0) + ((dac_info[lines-1] & 0xf) << 4);\r
96 for (i = lines; i < sizeof(dac_info) / sizeof(dac_info[0]); i++)\r
97 dac_info[i] = mid;\r
98 //for(i=len=0; i < lines; i++) {\r
99 // printf("%03i : %03i : %i\n", i, dac_info[i]>>4, dac_info[i]&0xf);\r
100 // len+=dac_info[i]&0xf;\r
101 //}\r
102 //printf("rate is %i, len %f\n", PsndRate, (double)PsndRate/(Pico.m.pal ? 50.0 : 60.0));\r
103 //printf("len total: %i, last pos: %i\n", len, pos);\r
104 //exit(8);\r
105}\r
106\r
107\r
108PICO_INTERNAL void PsndReset(void)\r
109{\r
110 void *ym2612_regs;\r
111\r
112 // also clear the internal registers+addr line\r
113 ym2612_regs = YM2612GetRegs();\r
114 memset(ym2612_regs, 0, 0x200+4);\r
115 timers_reset();\r
116\r
117 PsndRerate(0);\r
118}\r
119\r
120\r
121// to be called after changing sound rate or chips\r
122void PsndRerate(int preserve_state)\r
123{\r
124 void *state = NULL;\r
125 int target_fps = Pico.m.pal ? 50 : 60;\r
126\r
127 // not all rates are supported in MCD mode due to mp3 decoder limitations\r
128 if (PicoAHW & PAHW_MCD) {\r
129 if (PsndRate != 11025 && PsndRate != 22050 && PsndRate != 44100) PsndRate = 22050;\r
130 PicoOpt |= POPT_EN_STEREO; // force stereo\r
131 }\r
132\r
133 if (preserve_state) {\r
134 state = malloc(0x204);\r
135 if (state == NULL) return;\r
136 ym2612_pack_state();\r
137 memcpy(state, YM2612GetRegs(), 0x204);\r
138 }\r
139 YM2612Init(Pico.m.pal ? OSC_PAL/7 : OSC_NTSC/7, PsndRate);\r
140 if (preserve_state) {\r
141 // feed it back it's own registers, just like after loading state\r
142 memcpy(YM2612GetRegs(), state, 0x204);\r
143 ym2612_unpack_state();\r
144 if ((PicoAHW & PAHW_MCD) && !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))\r
145 cdda_start_play();\r
146 }\r
147\r
148 if (preserve_state) memcpy(state, sn76496_regs, 28*4); // remember old state\r
149 SN76496_init(Pico.m.pal ? OSC_PAL/15 : OSC_NTSC/15, PsndRate);\r
150 if (preserve_state) memcpy(sn76496_regs, state, 28*4); // restore old state\r
151\r
152 if (state)\r
153 free(state);\r
154\r
155 // calculate PsndLen\r
156 PsndLen=PsndRate / target_fps;\r
157 PsndLen_exc_add=((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
158 PsndLen_exc_cnt=0;\r
159\r
160 // recalculate dac info\r
161 dac_recalculate();\r
162\r
163 if (PicoAHW & PAHW_MCD)\r
164 pcm_set_rate(PsndRate);\r
165\r
166 // clear all buffers\r
167 memset32(PsndBuffer, 0, sizeof(PsndBuffer)/4);\r
168 memset(cdda_out_buffer, 0, sizeof(cdda_out_buffer));\r
169 if (PsndOut)\r
170 PsndClear();\r
171\r
172 // set mixer\r
173 PsndMix_32_to_16l = (PicoOpt & POPT_EN_STEREO) ? mix_32_to_16l_stereo : mix_32_to_16_mono;\r
174\r
175 if (PicoAHW & PAHW_PICO)\r
176 PicoReratePico();\r
177}\r
178\r
179\r
180PICO_INTERNAL void PsndDoDAC(int line_to)\r
181{\r
182 int pos, pos1, len;\r
183 int dout = ym2612.dacout;\r
184 int line_from = PsndDacLine;\r
185\r
186 PsndDacLine = line_to + 1;\r
187\r
188 pos =dac_info[line_from]>>4;\r
189 pos1=dac_info[line_to];\r
190 len = ((pos1>>4)-pos) + (pos1&0xf);\r
191 if (!len) return;\r
192\r
193 if (PicoOpt & POPT_EN_STEREO) {\r
194 short *d = PsndOut + pos*2;\r
195 for (; len > 0; len--, d+=2) *d = dout;\r
196 } else {\r
197 short *d = PsndOut + pos;\r
198 for (; len > 0; len--, d++) *d = dout;\r
199 }\r
200\r
201#if 0\r
202 if (do_pcm) {\r
203 int *d = PsndBuffer;\r
204 d += (PicoOpt&8) ? pos*2 : pos;\r
205 pcm_update(d, len, 1);\r
206 }\r
207#endif\r
208}\r
209\r
210// cdda\r
211static pm_file *cdda_stream = NULL;\r
212\r
213static void cdda_raw_update(int *buffer, int length)\r
214{\r
215 int ret, cdda_bytes;\r
216 if (cdda_stream == NULL) return;\r
217\r
218 cdda_bytes = length*4;\r
219 if (PsndRate <= 22050) cdda_bytes *= 2;\r
220 if (PsndRate < 22050) cdda_bytes *= 2;\r
221\r
222 ret = pm_read(cdda_out_buffer, cdda_bytes, cdda_stream);\r
223 if (ret < cdda_bytes) {\r
224 memset((char *)cdda_out_buffer + ret, 0, cdda_bytes - ret);\r
225 cdda_stream = NULL;\r
226 return;\r
227 }\r
228\r
229 // now mix\r
230 switch (PsndRate) {\r
231 case 44100: mix_16h_to_32(buffer, cdda_out_buffer, length*2); break;\r
232 case 22050: mix_16h_to_32_s1(buffer, cdda_out_buffer, length*2); break;\r
233 case 11025: mix_16h_to_32_s2(buffer, cdda_out_buffer, length*2); break;\r
234 }\r
235}\r
236\r
237PICO_INTERNAL void cdda_start_play(void)\r
238{\r
239 int lba_offset, index, lba_length, i;\r
240\r
241 elprintf(EL_STATUS, "cdda play track #%i", Pico_mcd->scd.Cur_Track);\r
242\r
243 index = Pico_mcd->scd.Cur_Track - 1;\r
244\r
245 lba_offset = Pico_mcd->scd.Cur_LBA - Track_to_LBA(index + 1);\r
246 if (lba_offset < 0) lba_offset = 0;\r
247 lba_offset += Pico_mcd->TOC.Tracks[index].Offset;\r
248\r
249 // find the actual file for this track\r
250 for (i = index; i >= 0; i--)\r
251 if (Pico_mcd->TOC.Tracks[i].F != NULL) break;\r
252\r
253 if (Pico_mcd->TOC.Tracks[i].F == NULL) {\r
254 elprintf(EL_STATUS|EL_ANOMALY, "no track?!");\r
255 return;\r
256 }\r
257\r
258 if (Pico_mcd->TOC.Tracks[i].ftype == TYPE_MP3)\r
259 {\r
260 int pos1024 = 0;\r
261\r
262 lba_length = Pico_mcd->TOC.Tracks[i].Length;\r
263 for (i++; i < Pico_mcd->TOC.Last_Track; i++) {\r
264 if (Pico_mcd->TOC.Tracks[i].F != NULL) break;\r
265 lba_length += Pico_mcd->TOC.Tracks[i].Length;\r
266 }\r
267\r
268 if (lba_offset)\r
269 pos1024 = lba_offset * 1024 / lba_length;\r
270\r
271 mp3_start_play(Pico_mcd->TOC.Tracks[index].F, pos1024);\r
272 return;\r
273 }\r
274\r
275 cdda_stream = Pico_mcd->TOC.Tracks[i].F;\r
276 PicoCDBufferFlush(); // buffering relies on fp not being touched\r
277 pm_seek(cdda_stream, lba_offset * 2352, SEEK_SET);\r
278 if (Pico_mcd->TOC.Tracks[i].ftype == TYPE_WAV)\r
279 {\r
280 // skip headers, assume it's 44kHz stereo uncompressed\r
281 pm_seek(cdda_stream, 44, SEEK_CUR);\r
282 }\r
283}\r
284\r
285\r
286PICO_INTERNAL void PsndClear(void)\r
287{\r
288 int len = PsndLen;\r
289 if (PsndLen_exc_add) len++;\r
290 if (PicoOpt & POPT_EN_STEREO)\r
291 memset32((int *) PsndOut, 0, len); // assume PsndOut to be aligned\r
292 else {\r
293 short *out = PsndOut;\r
294 if ((int)out & 2) { *out++ = 0; len--; }\r
295 memset32((int *) out, 0, len/2);\r
296 if (len & 1) out[len-1] = 0;\r
297 }\r
298}\r
299\r
300\r
301static int PsndRender(int offset, int length)\r
302{\r
303 int buf32_updated = 0;\r
304 int *buf32 = PsndBuffer+offset;\r
305 int stereo = (PicoOpt & 8) >> 3;\r
306 // emulating CD && PCM option enabled && PCM chip on && have enabled channels\r
307 int do_pcm = (PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_PCM) &&\r
308 (Pico_mcd->pcm.control & 0x80) && Pico_mcd->pcm.enabled;\r
309 offset <<= stereo;\r
310\r
311#if !SIMPLE_WRITE_SOUND\r
312 if (offset == 0) { // should happen once per frame\r
313 // compensate for float part of PsndLen\r
314 PsndLen_exc_cnt += PsndLen_exc_add;\r
315 if (PsndLen_exc_cnt >= 0x10000) {\r
316 PsndLen_exc_cnt -= 0x10000;\r
317 length++;\r
318 }\r
319 }\r
320#endif\r
321\r
322 // PSG\r
323 if (PicoOpt & POPT_EN_PSG)\r
324 SN76496Update(PsndOut+offset, length, stereo);\r
325\r
326 if (PicoAHW & PAHW_PICO) {\r
327 PicoPicoPCMUpdate(PsndOut+offset, length, stereo);\r
328 return length;\r
329 }\r
330\r
331 // Add in the stereo FM buffer\r
332 if (PicoOpt & POPT_EN_FM) {\r
333 buf32_updated = YM2612UpdateOne(buf32, length, stereo, 1);\r
334 } else\r
335 memset32(buf32, 0, length<<stereo);\r
336\r
337//printf("active_chs: %02x\n", buf32_updated);\r
338\r
339 // CD: PCM sound\r
340 if (do_pcm) {\r
341 pcm_update(buf32, length, stereo);\r
342 //buf32_updated = 1;\r
343 }\r
344\r
345 // CD: CDDA audio\r
346 // CD mode, cdda enabled, not data track, CDC is reading\r
347 if ((PicoAHW & PAHW_MCD) && (PicoOpt & POPT_EN_MCD_CDDA) &&\r
348 !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))\r
349 {\r
350 // note: only 44, 22 and 11 kHz supported, with forced stereo\r
351 int index = Pico_mcd->scd.Cur_Track - 1;\r
352\r
353 if (Pico_mcd->TOC.Tracks[index].ftype == TYPE_MP3)\r
354 mp3_update(buf32, length, stereo);\r
355 else\r
356 cdda_raw_update(buf32, length);\r
357 }\r
358\r
359 // convert + limit to normal 16bit output\r
360 PsndMix_32_to_16l(PsndOut+offset, buf32, length);\r
361\r
362 return length;\r
363}\r
364\r
365// to be called on 224 or line_sample scanlines only\r
366PICO_INTERNAL void PsndGetSamples(int y)\r
367{\r
368#if SIMPLE_WRITE_SOUND\r
369 if (y != 224) return;\r
370 PsndRender(0, PsndLen);\r
371 if (PicoWriteSound) PicoWriteSound(PsndLen);\r
372 PsndClear();\r
373#else\r
374 static int curr_pos = 0;\r
375\r
376 if (y == 224)\r
377 {\r
378 if (emustatus & 2)\r
379 curr_pos += PsndRender(curr_pos, PsndLen-PsndLen/2);\r
380 else curr_pos = PsndRender(0, PsndLen);\r
381 if (emustatus&1) emustatus|=2; else emustatus&=~2;\r
382 if (PicoWriteSound) PicoWriteSound(curr_pos);\r
383 // clear sound buffer\r
384 PsndClear();\r
385 }\r
386 else if (emustatus & 3) {\r
387 emustatus|= 2;\r
388 emustatus&=~1;\r
389 curr_pos = PsndRender(0, PsndLen/2);\r
390 }\r
391#endif\r
392}\r
393\r
394\r
395// -----------------------------------------------------------------\r
396// z80 stuff\r
397\r
398#ifdef _USE_MZ80\r
399\r
400// memhandlers for mz80 core\r
401unsigned char mz80_read(UINT32 a, struct MemoryReadByte *w) { return z80_read(a); }\r
402void mz80_write(UINT32 a, UINT8 d, struct MemoryWriteByte *w) { z80_write(d, a); }\r
403\r
404// structures for mz80 core\r
405static struct MemoryReadByte mz80_mem_read[]=\r
406{\r
407 {0x0000,0xffff,mz80_read},\r
408 {(UINT32) -1,(UINT32) -1,NULL}\r
409};\r
410static struct MemoryWriteByte mz80_mem_write[]=\r
411{\r
412 {0x0000,0xffff,mz80_write},\r
413 {(UINT32) -1,(UINT32) -1,NULL}\r
414};\r
415static struct z80PortRead mz80_io_read[] ={\r
416 {(UINT16) -1,(UINT16) -1,NULL}\r
417};\r
418static struct z80PortWrite mz80_io_write[]={\r
419 {(UINT16) -1,(UINT16) -1,NULL}\r
420};\r
421\r
422int mz80_run(int cycles)\r
423{\r
424 int ticks_pre = mz80GetElapsedTicks(0);\r
425 mz80exec(cycles);\r
426 return mz80GetElapsedTicks(0) - ticks_pre;\r
427}\r
428\r
429#endif\r
430\r
431#ifdef _USE_DRZ80\r
432\r
433struct DrZ80 drZ80;\r
434\r
435static unsigned int DrZ80_rebasePC(unsigned short a)\r
436{\r
437 drZ80.Z80PC_BASE = (unsigned int) Pico.zram;\r
438 return drZ80.Z80PC_BASE + a;\r
439}\r
440\r
441static unsigned int DrZ80_rebaseSP(unsigned short a)\r
442{\r
443 drZ80.Z80SP_BASE = (unsigned int) Pico.zram;\r
444 return drZ80.Z80SP_BASE + a;\r
445}\r
446#endif\r
447\r
448#if defined(_USE_DRZ80) || defined(_USE_CZ80)\r
449static unsigned char z80_in(unsigned short p)\r
450{\r
451 elprintf(EL_ANOMALY, "Z80 port %04x read", p);\r
452 return 0xff;\r
453}\r
454\r
455static void z80_out(unsigned short p,unsigned char d)\r
456{\r
457 elprintf(EL_ANOMALY, "Z80 port %04x write %02x", p, d);\r
458}\r
459#endif\r
460\r
461\r
462// z80 functionality wrappers\r
463PICO_INTERNAL void z80_init(void)\r
464{\r
465#ifdef _USE_MZ80\r
466 struct mz80context z80;\r
467\r
468 // z80\r
469 mz80init();\r
470 // Modify the default context\r
471 mz80GetContext(&z80);\r
472\r
473 // point mz80 stuff\r
474 z80.z80Base=Pico.zram;\r
475 z80.z80MemRead=mz80_mem_read;\r
476 z80.z80MemWrite=mz80_mem_write;\r
477 z80.z80IoRead=mz80_io_read;\r
478 z80.z80IoWrite=mz80_io_write;\r
479\r
480 mz80SetContext(&z80);\r
481#endif\r
482#ifdef _USE_DRZ80\r
483 memset(&drZ80, 0, sizeof(struct DrZ80));\r
484 drZ80.z80_rebasePC=DrZ80_rebasePC;\r
485 drZ80.z80_rebaseSP=DrZ80_rebaseSP;\r
486 drZ80.z80_read8 =z80_read;\r
487 drZ80.z80_read16 =NULL;\r
488 drZ80.z80_write8 =z80_write;\r
489 drZ80.z80_write16 =NULL;\r
490 drZ80.z80_in =z80_in;\r
491 drZ80.z80_out =z80_out;\r
492 drZ80.z80_irq_callback=NULL;\r
493#endif\r
494#ifdef _USE_CZ80\r
495 memset(&CZ80, 0, sizeof(CZ80));\r
496 Cz80_Init(&CZ80);\r
497 Cz80_Set_Fetch(&CZ80, 0x0000, 0x1fff, (UINT32)Pico.zram); // main RAM\r
498 Cz80_Set_Fetch(&CZ80, 0x2000, 0x3fff, (UINT32)Pico.zram); // mirror\r
499 Cz80_Set_ReadB(&CZ80, (UINT8 (*)(UINT32 address))z80_read); // unused (hacked in)\r
500 Cz80_Set_WriteB(&CZ80, z80_write);\r
501 Cz80_Set_INPort(&CZ80, z80_in);\r
502 Cz80_Set_OUTPort(&CZ80, z80_out);\r
503#endif\r
504}\r
505\r
506PICO_INTERNAL void z80_reset(void)\r
507{\r
508#ifdef _USE_MZ80\r
509 mz80reset();\r
510#endif\r
511#ifdef _USE_DRZ80\r
512 memset(&drZ80, 0, 0x54);\r
513 drZ80.Z80F = (1<<2); // set ZFlag\r
514 drZ80.Z80F2 = (1<<2); // set ZFlag\r
515 drZ80.Z80IX = 0xFFFF << 16;\r
516 drZ80.Z80IY = 0xFFFF << 16;\r
517 drZ80.Z80IM = 0; // 1?\r
518 drZ80.z80irqvector = 0xff0000; // RST 38h\r
519 drZ80.Z80PC = drZ80.z80_rebasePC(0);\r
520 drZ80.Z80SP = drZ80.z80_rebaseSP(0x2000); // 0xf000 ?\r
521#endif\r
522#ifdef _USE_CZ80\r
523 Cz80_Reset(&CZ80);\r
524 Cz80_Set_Reg(&CZ80, CZ80_IX, 0xffff);\r
525 Cz80_Set_Reg(&CZ80, CZ80_IY, 0xffff);\r
526 Cz80_Set_Reg(&CZ80, CZ80_SP, 0x2000);\r
527#endif\r
528 Pico.m.z80_fakeval = 0; // for faking when Z80 is disabled\r
529}\r
530\r
531#if 0\r
532static int had_irq = 0, z80_ppc, z80_ops_done = 0;\r
533int z80_cycles_left = 0;\r
534\r
535void z80_int(void)\r
536{\r
537 had_irq = 1;\r
538}\r
539\r
540static void xfail(void)\r
541{\r
542 printf("PC: %04x, %04x\n", Cz80_Get_Reg(&CZ80, CZ80_PC), z80_ppc);\r
543 printf("z80_ops_done done: %i\n", z80_ops_done);\r
544 exit(1);\r
545}\r
546\r
547int z80_run(int cycles)\r
548{\r
549 int fail = 0;\r
550 int cdrz, ccz;\r
551\r
552 z80_cycles_left = cycles;\r
553 z80_ppc = Cz80_Get_Reg(&CZ80, CZ80_PC);\r
554\r
555 if (had_irq) {\r
556 printf("irq @ %04x\n", Cz80_Get_Reg(&CZ80, CZ80_PC));\r
557 Cz80_Set_IRQ(&CZ80, 0, HOLD_LINE);\r
558 drZ80.Z80_IRQ = 1;\r
559 had_irq = 0;\r
560 }\r
561\r
562 while (z80_cycles_left > 0)\r
563 {\r
564 ccz = Cz80_Exec(&CZ80, 1);\r
565 cdrz = 1 - DrZ80Run(&drZ80, 1);\r
566\r
567 if (drZ80.Z80_IRQ && (drZ80.Z80IF&1))\r
568 cdrz += 1 - DrZ80Run(&drZ80, 1); // cz80 processes IRQ after EI, DrZ80 does not\r
569\r
570 if (cdrz != ccz) {\r
571 printf("cycles: %i vs %i\n", cdrz, ccz);\r
572 fail = 1;\r
573 }\r
574\r
575 if (drZ80.Z80PC - drZ80.Z80PC_BASE != Cz80_Get_Reg(&CZ80, CZ80_PC)) {\r
576 printf("PC: %04x vs %04x\n", drZ80.Z80PC - drZ80.Z80PC_BASE, Cz80_Get_Reg(&CZ80, CZ80_PC));\r
577 fail = 1;\r
578 }\r
579\r
580 if (fail) xfail();\r
581\r
582 z80_ops_done++;\r
583 z80_cycles_left -= ccz;\r
584 z80_ppc = Cz80_Get_Reg(&CZ80, CZ80_PC);\r
585 }\r
586\r
587 return co - z80_cycles_left;\r
588}\r
589#endif\r
590\r
591\r
592PICO_INTERNAL void z80_pack(unsigned char *data)\r
593{\r
594#if defined(_USE_MZ80)\r
595 struct mz80context mz80;\r
596 *(int *)data = 0x00005A6D; // "mZ"\r
597 mz80GetContext(&mz80);\r
598 memcpy(data+4, &mz80.z80clockticks, sizeof(mz80)-5*4); // don't save base&memhandlers\r
599#elif defined(_USE_DRZ80)\r
600 *(int *)data = 0x015A7244; // "DrZ" v1\r
601 drZ80.Z80PC = drZ80.z80_rebasePC(drZ80.Z80PC-drZ80.Z80PC_BASE);\r
602 drZ80.Z80SP = drZ80.z80_rebaseSP(drZ80.Z80SP-drZ80.Z80SP_BASE);\r
603 memcpy(data+4, &drZ80, 0x54);\r
604#elif defined(_USE_CZ80)\r
605 *(int *)data = 0x00007a43; // "Cz"\r
606 *(int *)(data+4) = Cz80_Get_Reg(&CZ80, CZ80_PC);\r
607 memcpy(data+8, &CZ80, (INT32)&CZ80.BasePC - (INT32)&CZ80);\r
608#endif\r
609}\r
610\r
611PICO_INTERNAL void z80_unpack(unsigned char *data)\r
612{\r
613#if defined(_USE_MZ80)\r
614 if (*(int *)data == 0x00005A6D) { // "mZ" save?\r
615 struct mz80context mz80;\r
616 mz80GetContext(&mz80);\r
617 memcpy(&mz80.z80clockticks, data+4, sizeof(mz80)-5*4);\r
618 mz80SetContext(&mz80);\r
619 } else {\r
620 z80_reset();\r
621 z80_int();\r
622 }\r
623#elif defined(_USE_DRZ80)\r
624 if (*(int *)data == 0x015A7244) { // "DrZ" v1 save?\r
625 memcpy(&drZ80, data+4, 0x54);\r
626 // update bases\r
627 drZ80.Z80PC = drZ80.z80_rebasePC(drZ80.Z80PC-drZ80.Z80PC_BASE);\r
628 drZ80.Z80SP = drZ80.z80_rebaseSP(drZ80.Z80SP-drZ80.Z80SP_BASE);\r
629 } else {\r
630 z80_reset();\r
631 drZ80.Z80IM = 1;\r
632 z80_int(); // try to goto int handler, maybe we won't execute trash there?\r
633 }\r
634#elif defined(_USE_CZ80)\r
635 if (*(int *)data == 0x00007a43) { // "Cz" save?\r
636 memcpy(&CZ80, data+8, (INT32)&CZ80.BasePC - (INT32)&CZ80);\r
637 Cz80_Set_Reg(&CZ80, CZ80_PC, *(int *)(data+4));\r
638 } else {\r
639 z80_reset();\r
640 z80_int();\r
641 }\r
642#endif\r
643}\r
644\r
645PICO_INTERNAL void z80_exit(void)\r
646{\r
647#if defined(_USE_MZ80)\r
648 mz80shutdown();\r
649#endif\r
650}\r
651\r
652#if 1 // defined(__DEBUG_PRINT) || defined(__GP2X__) || defined(__GIZ__)\r
653PICO_INTERNAL void z80_debug(char *dstr)\r
654{\r
655#if defined(_USE_DRZ80)\r
656 sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", drZ80.Z80PC-drZ80.Z80PC_BASE, drZ80.Z80SP-drZ80.Z80SP_BASE);\r
657#elif defined(_USE_CZ80)\r
658 sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", CZ80.PC - CZ80.BasePC, CZ80.SP.W);\r
659#endif\r
660}\r
661#endif\r
fast MegaDrive/MegaCD/32X emulator