cc68a136 |
1 | // This is part of Pico Library\r |
2 | \r |
3 | // (c) Copyright 2004 Dave, All rights reserved.\r |
b542be46 |
4 | // (c) Copyright 2006,2007 notaz, All rights reserved.\r |
cc68a136 |
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 |
cc68a136 |
11 | #include "ym2612.h"\r |
12 | #include "sn76496.h"\r |
efcba75f |
13 | #include "../pico_int.h"\r |
4f265db7 |
14 | #include "../cd/pcm.h"\r |
15 | #include "mix.h"\r |
cc68a136 |
16 | \r |
4a32f01f |
17 | void (*PsndMix_32_to_16l)(short *dest, int *src, int count) = mix_32_to_16l_stereo;\r |
18 | \r |
4f265db7 |
19 | // master int buffer to mix to\r |
20 | static int PsndBuffer[2*44100/50];\r |
cc68a136 |
21 | \r |
cc68a136 |
22 | // dac\r |
4b9c5888 |
23 | static unsigned short dac_info[312+4]; // pppppppp ppppllll, p - pos in buff, l - length to write for this sample\r |
cc68a136 |
24 | \r |
c9e1affc |
25 | // cdda output buffer\r |
26 | short cdda_out_buffer[2*1152];\r |
27 | \r |
cc68a136 |
28 | // for Pico\r |
29 | int PsndRate=0;\r |
30 | int PsndLen=0; // number of mono samples, multiply by 2 for stereo\r |
7a93adeb |
31 | int PsndLen_exc_add=0; // this is for non-integer sample counts per line, eg. 22050/60\r |
32 | int PsndLen_exc_cnt=0;\r |
4b9c5888 |
33 | int PsndDacLine=0;\r |
cc68a136 |
34 | short *PsndOut=NULL; // PCM data buffer\r |
35 | \r |
4b9c5888 |
36 | // timers\r |
48dc74f2 |
37 | int timer_a_next_oflow, timer_a_step; // in z80 cycles\r |
38 | int timer_b_next_oflow, timer_b_step;\r |
4b9c5888 |
39 | \r |
cc68a136 |
40 | // sn76496\r |
41 | extern int *sn76496_regs;\r |
42 | \r |
43 | \r |
eff55556 |
44 | static void dac_recalculate(void)\r |
cc68a136 |
45 | {\r |
46 | int i, dac_cnt, pos, len, lines = Pico.m.pal ? 312 : 262, mid = Pico.m.pal ? 68 : 93;\r |
47 | \r |
43e6eaad |
48 | if (PsndLen <= lines)\r |
49 | {\r |
cc68a136 |
50 | // shrinking algo\r |
7a93adeb |
51 | dac_cnt = -PsndLen;\r |
cc68a136 |
52 | len=1; pos=0;\r |
53 | dac_info[225] = 1;\r |
54 | \r |
43e6eaad |
55 | for(i=226; i != 225; i++)\r |
56 | {\r |
cc68a136 |
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 |
43e6eaad |
67 | }\r |
68 | else\r |
69 | {\r |
cc68a136 |
70 | // stretching\r |
7a93adeb |
71 | dac_cnt = PsndLen;\r |
cc68a136 |
72 | pos=0;\r |
43e6eaad |
73 | for(i = 225; i != 224; i++)\r |
74 | {\r |
cc68a136 |
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 |
4f265db7 |
81 | if (i == mid) // midpoint\r |
cc68a136 |
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 |
7a93adeb |
92 | if (PsndLen_exc_add) len++;\r |
cc68a136 |
93 | dac_info[224] = (pos<<4)|len;\r |
94 | }\r |
538a6098 |
95 | mid = (dac_info[lines-1] & 0xfff0) + ((dac_info[lines-1] & 0xf) << 4);\r |
4b9c5888 |
96 | for (i = lines; i < sizeof(dac_info) / sizeof(dac_info[0]); i++)\r |
538a6098 |
97 | dac_info[i] = mid;\r |
7a93adeb |
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 |
cc68a136 |
105 | }\r |
106 | \r |
107 | \r |
9d917eea |
108 | PICO_INTERNAL void PsndReset(void)\r |
cc68a136 |
109 | {\r |
cc68a136 |
110 | void *ym2612_regs;\r |
111 | \r |
cc68a136 |
112 | // also clear the internal registers+addr line\r |
113 | ym2612_regs = YM2612GetRegs();\r |
114 | memset(ym2612_regs, 0, 0x200+4);\r |
4b9c5888 |
115 | timers_reset();\r |
7a93adeb |
116 | \r |
9d917eea |
117 | PsndRerate(0);\r |
cc68a136 |
118 | }\r |
119 | \r |
120 | \r |
121 | // to be called after changing sound rate or chips\r |
9d917eea |
122 | void PsndRerate(int preserve_state)\r |
cc68a136 |
123 | {\r |
5f8c85be |
124 | void *state = NULL;\r |
7a93adeb |
125 | int target_fps = Pico.m.pal ? 50 : 60;\r |
cc68a136 |
126 | \r |
7a93adeb |
127 | // not all rates are supported in MCD mode due to mp3 decoder limitations\r |
602133e1 |
128 | if (PicoAHW & PAHW_MCD) {\r |
4f265db7 |
129 | if (PsndRate != 11025 && PsndRate != 22050 && PsndRate != 44100) PsndRate = 22050;\r |
602133e1 |
130 | PicoOpt |= POPT_EN_STEREO; // force stereo\r |
4f265db7 |
131 | }\r |
132 | \r |
7a93adeb |
133 | if (preserve_state) {\r |
5f8c85be |
134 | state = malloc(0x200);\r |
135 | if (state == NULL) return;\r |
136 | memcpy(state, YM2612GetRegs(), 0x200);\r |
7a93adeb |
137 | }\r |
cc68a136 |
138 | YM2612Init(Pico.m.pal ? OSC_PAL/7 : OSC_NTSC/7, PsndRate);\r |
7a93adeb |
139 | if (preserve_state) {\r |
140 | // feed it back it's own registers, just like after loading state\r |
5f8c85be |
141 | memcpy(YM2612GetRegs(), state, 0x200);\r |
453d2a6e |
142 | ym2612_unpack_state();\r |
c9e1affc |
143 | if ((PicoAHW & PAHW_MCD) && !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))\r |
144 | cdda_start_play();\r |
7a93adeb |
145 | }\r |
cc68a136 |
146 | \r |
7a93adeb |
147 | if (preserve_state) memcpy(state, sn76496_regs, 28*4); // remember old state\r |
cc68a136 |
148 | SN76496_init(Pico.m.pal ? OSC_PAL/15 : OSC_NTSC/15, PsndRate);\r |
7a93adeb |
149 | if (preserve_state) memcpy(sn76496_regs, state, 28*4); // restore old state\r |
cc68a136 |
150 | \r |
5f8c85be |
151 | if (state)\r |
152 | free(state);\r |
153 | \r |
cc68a136 |
154 | // calculate PsndLen\r |
7a93adeb |
155 | PsndLen=PsndRate / target_fps;\r |
156 | PsndLen_exc_add=((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r |
157 | PsndLen_exc_cnt=0;\r |
cc68a136 |
158 | \r |
159 | // recalculate dac info\r |
160 | dac_recalculate();\r |
4f265db7 |
161 | \r |
602133e1 |
162 | if (PicoAHW & PAHW_MCD)\r |
4f265db7 |
163 | pcm_set_rate(PsndRate);\r |
7a93adeb |
164 | \r |
165 | // clear all buffers\r |
166 | memset32(PsndBuffer, 0, sizeof(PsndBuffer)/4);\r |
c9e1affc |
167 | memset(cdda_out_buffer, 0, sizeof(cdda_out_buffer));\r |
7a93adeb |
168 | if (PsndOut)\r |
9d917eea |
169 | PsndClear();\r |
4a32f01f |
170 | \r |
171 | // set mixer\r |
602133e1 |
172 | PsndMix_32_to_16l = (PicoOpt & POPT_EN_STEREO) ? mix_32_to_16l_stereo : mix_32_to_16_mono;\r |
ed367a3f |
173 | \r |
174 | if (PicoAHW & PAHW_PICO)\r |
175 | PicoReratePico();\r |
cc68a136 |
176 | }\r |
177 | \r |
178 | \r |
4b9c5888 |
179 | PICO_INTERNAL void PsndDoDAC(int line_to)\r |
cc68a136 |
180 | {\r |
4b9c5888 |
181 | int pos, pos1, len;\r |
182 | int dout = ym2612.dacout;\r |
183 | int line_from = PsndDacLine;\r |
4f265db7 |
184 | \r |
4b9c5888 |
185 | PsndDacLine = line_to + 1;\r |
4f265db7 |
186 | \r |
4b9c5888 |
187 | pos =dac_info[line_from]>>4;\r |
188 | pos1=dac_info[line_to];\r |
189 | len = ((pos1>>4)-pos) + (pos1&0xf);\r |
4f265db7 |
190 | if (!len) return;\r |
191 | \r |
4b9c5888 |
192 | if (PicoOpt & POPT_EN_STEREO) {\r |
4f265db7 |
193 | short *d = PsndOut + pos*2;\r |
4b9c5888 |
194 | for (; len > 0; len--, d+=2) *d = dout;\r |
195 | } else {\r |
196 | short *d = PsndOut + pos;\r |
197 | for (; len > 0; len--, d++) *d = dout;\r |
cc68a136 |
198 | }\r |
199 | \r |
4f265db7 |
200 | #if 0\r |
201 | if (do_pcm) {\r |
202 | int *d = PsndBuffer;\r |
203 | d += (PicoOpt&8) ? pos*2 : pos;\r |
204 | pcm_update(d, len, 1);\r |
205 | }\r |
206 | #endif\r |
207 | }\r |
cc68a136 |
208 | \r |
c9e1affc |
209 | // cdda\r |
210 | static pm_file *cdda_stream = NULL;\r |
211 | \r |
212 | static void cdda_raw_update(int *buffer, int length)\r |
213 | {\r |
214 | int ret, cdda_bytes;\r |
215 | if (cdda_stream == NULL) return;\r |
216 | \r |
217 | cdda_bytes = length*4;\r |
218 | if (PsndRate <= 22050) cdda_bytes *= 2;\r |
219 | if (PsndRate < 22050) cdda_bytes *= 2;\r |
220 | \r |
221 | ret = pm_read(cdda_out_buffer, cdda_bytes, cdda_stream);\r |
222 | if (ret < cdda_bytes) {\r |
223 | memset((char *)cdda_out_buffer + ret, 0, cdda_bytes - ret);\r |
224 | cdda_stream = NULL;\r |
225 | return;\r |
226 | }\r |
227 | \r |
228 | // now mix\r |
229 | switch (PsndRate) {\r |
230 | case 44100: mix_16h_to_32(buffer, cdda_out_buffer, length*2); break;\r |
231 | case 22050: mix_16h_to_32_s1(buffer, cdda_out_buffer, length*2); break;\r |
232 | case 11025: mix_16h_to_32_s2(buffer, cdda_out_buffer, length*2); break;\r |
233 | }\r |
234 | }\r |
235 | \r |
236 | PICO_INTERNAL void cdda_start_play(void)\r |
237 | {\r |
238 | int lba_offset, index, lba_length, i;\r |
239 | \r |
240 | elprintf(EL_STATUS, "cdda play track #%i", Pico_mcd->scd.Cur_Track);\r |
241 | \r |
242 | index = Pico_mcd->scd.Cur_Track - 1;\r |
243 | \r |
244 | lba_offset = Pico_mcd->scd.Cur_LBA - Track_to_LBA(index + 1);\r |
245 | if (lba_offset < 0) lba_offset = 0;\r |
246 | lba_offset += Pico_mcd->TOC.Tracks[index].Offset;\r |
247 | \r |
248 | // find the actual file for this track\r |
249 | for (i = index; i >= 0; i--)\r |
250 | if (Pico_mcd->TOC.Tracks[i].F != NULL) break;\r |
251 | \r |
252 | if (Pico_mcd->TOC.Tracks[i].F == NULL) {\r |
253 | elprintf(EL_STATUS|EL_ANOMALY, "no track?!");\r |
254 | return;\r |
255 | }\r |
256 | \r |
257 | if (Pico_mcd->TOC.Tracks[i].ftype == TYPE_MP3)\r |
258 | {\r |
259 | int pos1024 = 0;\r |
260 | \r |
261 | lba_length = Pico_mcd->TOC.Tracks[i].Length;\r |
262 | for (i++; i < Pico_mcd->TOC.Last_Track; i++) {\r |
263 | if (Pico_mcd->TOC.Tracks[i].F != NULL) break;\r |
264 | lba_length += Pico_mcd->TOC.Tracks[i].Length;\r |
265 | }\r |
266 | \r |
267 | if (lba_offset)\r |
268 | pos1024 = lba_offset * 1024 / lba_length;\r |
269 | \r |
270 | mp3_start_play(Pico_mcd->TOC.Tracks[index].F, pos1024);\r |
271 | return;\r |
272 | }\r |
273 | \r |
274 | cdda_stream = Pico_mcd->TOC.Tracks[i].F;\r |
275 | PicoCDBufferFlush(); // buffering relies on fp not being touched\r |
276 | pm_seek(cdda_stream, lba_offset * 2352, SEEK_SET);\r |
0bccafeb |
277 | if (Pico_mcd->TOC.Tracks[i].ftype == TYPE_WAV)\r |
278 | {\r |
279 | // skip headers, assume it's 44kHz stereo uncompressed\r |
280 | pm_seek(cdda_stream, 44, SEEK_CUR);\r |
281 | }\r |
c9e1affc |
282 | }\r |
283 | \r |
cc68a136 |
284 | \r |
9d917eea |
285 | PICO_INTERNAL void PsndClear(void)\r |
4f265db7 |
286 | {\r |
7a93adeb |
287 | int len = PsndLen;\r |
288 | if (PsndLen_exc_add) len++;\r |
602133e1 |
289 | if (PicoOpt & POPT_EN_STEREO)\r |
88b3d7c1 |
290 | memset32((int *) PsndOut, 0, len); // assume PsndOut to be aligned\r |
291 | else {\r |
292 | short *out = PsndOut;\r |
293 | if ((int)out & 2) { *out++ = 0; len--; }\r |
294 | memset32((int *) out, 0, len/2);\r |
295 | if (len & 1) out[len-1] = 0;\r |
296 | }\r |
cc68a136 |
297 | }\r |
298 | \r |
299 | \r |
7b3f44c6 |
300 | static int PsndRender(int offset, int length)\r |
cc68a136 |
301 | {\r |
85f8e929 |
302 | int buf32_updated = 0;\r |
4f265db7 |
303 | int *buf32 = PsndBuffer+offset;\r |
cc68a136 |
304 | int stereo = (PicoOpt & 8) >> 3;\r |
4f265db7 |
305 | // emulating CD && PCM option enabled && PCM chip on && have enabled channels\r |
602133e1 |
306 | int do_pcm = (PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_PCM) &&\r |
307 | (Pico_mcd->pcm.control & 0x80) && Pico_mcd->pcm.enabled;\r |
cc68a136 |
308 | offset <<= stereo;\r |
309 | \r |
03a265e5 |
310 | #if !SIMPLE_WRITE_SOUND\r |
7a93adeb |
311 | if (offset == 0) { // should happen once per frame\r |
312 | // compensate for float part of PsndLen\r |
313 | PsndLen_exc_cnt += PsndLen_exc_add;\r |
314 | if (PsndLen_exc_cnt >= 0x10000) {\r |
315 | PsndLen_exc_cnt -= 0x10000;\r |
316 | length++;\r |
317 | }\r |
318 | }\r |
03a265e5 |
319 | #endif\r |
7a93adeb |
320 | \r |
cc68a136 |
321 | // PSG\r |
602133e1 |
322 | if (PicoOpt & POPT_EN_PSG)\r |
cc68a136 |
323 | SN76496Update(PsndOut+offset, length, stereo);\r |
324 | \r |
ef4eb506 |
325 | if (PicoAHW & PAHW_PICO) {\r |
326 | PicoPicoPCMUpdate(PsndOut+offset, length, stereo);\r |
327 | return length;\r |
328 | }\r |
329 | \r |
cc68a136 |
330 | // Add in the stereo FM buffer\r |
602133e1 |
331 | if (PicoOpt & POPT_EN_FM) {\r |
85f8e929 |
332 | buf32_updated = YM2612UpdateOne(buf32, length, stereo, 1);\r |
3ec29f01 |
333 | } else\r |
fa1e5e29 |
334 | memset32(buf32, 0, length<<stereo);\r |
85f8e929 |
335 | \r |
336 | //printf("active_chs: %02x\n", buf32_updated);\r |
4f265db7 |
337 | \r |
7a93adeb |
338 | // CD: PCM sound\r |
85f8e929 |
339 | if (do_pcm) {\r |
4f265db7 |
340 | pcm_update(buf32, length, stereo);\r |
85f8e929 |
341 | //buf32_updated = 1;\r |
342 | }\r |
4f265db7 |
343 | \r |
7a93adeb |
344 | // CD: CDDA audio\r |
da42200b |
345 | // CD mode, cdda enabled, not data track, CDC is reading\r |
602133e1 |
346 | if ((PicoAHW & PAHW_MCD) && (PicoOpt & POPT_EN_MCD_CDDA) &&\r |
347 | !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))\r |
c9e1affc |
348 | {\r |
349 | // note: only 44, 22 and 11 kHz supported, with forced stereo\r |
350 | int index = Pico_mcd->scd.Cur_Track - 1;\r |
351 | \r |
352 | if (Pico_mcd->TOC.Tracks[index].ftype == TYPE_MP3)\r |
353 | mp3_update(buf32, length, stereo);\r |
354 | else\r |
355 | cdda_raw_update(buf32, length);\r |
356 | }\r |
4f265db7 |
357 | \r |
358 | // convert + limit to normal 16bit output\r |
4a32f01f |
359 | PsndMix_32_to_16l(PsndOut+offset, buf32, length);\r |
cc68a136 |
360 | \r |
7a93adeb |
361 | return length;\r |
cc68a136 |
362 | }\r |
363 | \r |
7b3f44c6 |
364 | // to be called on 224 or line_sample scanlines only\r |
365 | PICO_INTERNAL void PsndGetSamples(int y)\r |
366 | {\r |
367 | #if SIMPLE_WRITE_SOUND\r |
368 | if (y != 224) return;\r |
369 | PsndRender(0, PsndLen);\r |
370 | if (PicoWriteSound) PicoWriteSound(PsndLen);\r |
371 | PsndClear();\r |
372 | #else\r |
373 | static int curr_pos = 0;\r |
374 | \r |
375 | if (y == 224)\r |
376 | {\r |
377 | if (emustatus & 2)\r |
378 | curr_pos += PsndRender(curr_pos, PsndLen-PsndLen/2);\r |
379 | else curr_pos = PsndRender(0, PsndLen);\r |
380 | if (emustatus&1) emustatus|=2; else emustatus&=~2;\r |
381 | if (PicoWriteSound) PicoWriteSound(curr_pos);\r |
382 | // clear sound buffer\r |
383 | PsndClear();\r |
384 | }\r |
385 | else if (emustatus & 3) {\r |
386 | emustatus|= 2;\r |
387 | emustatus&=~1;\r |
388 | curr_pos = PsndRender(0, PsndLen/2);\r |
389 | }\r |
390 | #endif\r |
391 | }\r |
392 | \r |
cc68a136 |
393 | \r |
c9e1affc |
394 | // -----------------------------------------------------------------\r |
395 | // z80 stuff\r |
396 | \r |
4936aac1 |
397 | #ifdef _USE_MZ80\r |
cc68a136 |
398 | \r |
399 | // memhandlers for mz80 core\r |
400 | unsigned char mz80_read(UINT32 a, struct MemoryReadByte *w) { return z80_read(a); }\r |
401 | void mz80_write(UINT32 a, UINT8 d, struct MemoryWriteByte *w) { z80_write(d, a); }\r |
402 | \r |
403 | // structures for mz80 core\r |
404 | static struct MemoryReadByte mz80_mem_read[]=\r |
405 | {\r |
406 | {0x0000,0xffff,mz80_read},\r |
407 | {(UINT32) -1,(UINT32) -1,NULL}\r |
408 | };\r |
409 | static struct MemoryWriteByte mz80_mem_write[]=\r |
410 | {\r |
411 | {0x0000,0xffff,mz80_write},\r |
412 | {(UINT32) -1,(UINT32) -1,NULL}\r |
413 | };\r |
414 | static struct z80PortRead mz80_io_read[] ={\r |
415 | {(UINT16) -1,(UINT16) -1,NULL}\r |
416 | };\r |
417 | static struct z80PortWrite mz80_io_write[]={\r |
418 | {(UINT16) -1,(UINT16) -1,NULL}\r |
419 | };\r |
420 | \r |
b542be46 |
421 | int mz80_run(int cycles)\r |
422 | {\r |
423 | int ticks_pre = mz80GetElapsedTicks(0);\r |
424 | mz80exec(cycles);\r |
425 | return mz80GetElapsedTicks(0) - ticks_pre;\r |
426 | }\r |
427 | \r |
4936aac1 |
428 | #endif\r |
429 | \r |
430 | #ifdef _USE_DRZ80\r |
cc68a136 |
431 | \r |
b542be46 |
432 | struct DrZ80 drZ80;\r |
cc68a136 |
433 | \r |
434 | static unsigned int DrZ80_rebasePC(unsigned short a)\r |
435 | {\r |
436 | drZ80.Z80PC_BASE = (unsigned int) Pico.zram;\r |
437 | return drZ80.Z80PC_BASE + a;\r |
438 | }\r |
439 | \r |
440 | static unsigned int DrZ80_rebaseSP(unsigned short a)\r |
441 | {\r |
442 | drZ80.Z80SP_BASE = (unsigned int) Pico.zram;\r |
443 | return drZ80.Z80SP_BASE + a;\r |
444 | }\r |
9d917eea |
445 | #endif\r |
cc68a136 |
446 | \r |
9d917eea |
447 | #if defined(_USE_DRZ80) || defined(_USE_CZ80)\r |
448 | static unsigned char z80_in(unsigned short p)\r |
cc68a136 |
449 | {\r |
9d917eea |
450 | elprintf(EL_ANOMALY, "Z80 port %04x read", p);\r |
451 | return 0xff;\r |
cc68a136 |
452 | }\r |
453 | \r |
9d917eea |
454 | static void z80_out(unsigned short p,unsigned char d)\r |
cc68a136 |
455 | {\r |
9d917eea |
456 | elprintf(EL_ANOMALY, "Z80 port %04x write %02x", p, d);\r |
cc68a136 |
457 | }\r |
cc68a136 |
458 | #endif\r |
459 | \r |
9d917eea |
460 | \r |
cc68a136 |
461 | // z80 functionality wrappers\r |
eff55556 |
462 | PICO_INTERNAL void z80_init(void)\r |
cc68a136 |
463 | {\r |
4936aac1 |
464 | #ifdef _USE_MZ80\r |
cc68a136 |
465 | struct mz80context z80;\r |
466 | \r |
467 | // z80\r |
468 | mz80init();\r |
469 | // Modify the default context\r |
470 | mz80GetContext(&z80);\r |
4f265db7 |
471 | \r |
cc68a136 |
472 | // point mz80 stuff\r |
473 | z80.z80Base=Pico.zram;\r |
474 | z80.z80MemRead=mz80_mem_read;\r |
475 | z80.z80MemWrite=mz80_mem_write;\r |
476 | z80.z80IoRead=mz80_io_read;\r |
477 | z80.z80IoWrite=mz80_io_write;\r |
4f265db7 |
478 | \r |
cc68a136 |
479 | mz80SetContext(&z80);\r |
4936aac1 |
480 | #endif\r |
481 | #ifdef _USE_DRZ80\r |
cc68a136 |
482 | memset(&drZ80, 0, sizeof(struct DrZ80));\r |
483 | drZ80.z80_rebasePC=DrZ80_rebasePC;\r |
484 | drZ80.z80_rebaseSP=DrZ80_rebaseSP;\r |
485 | drZ80.z80_read8 =z80_read;\r |
4936aac1 |
486 | drZ80.z80_read16 =NULL;\r |
cc68a136 |
487 | drZ80.z80_write8 =z80_write;\r |
4936aac1 |
488 | drZ80.z80_write16 =NULL;\r |
9d917eea |
489 | drZ80.z80_in =z80_in;\r |
490 | drZ80.z80_out =z80_out;\r |
4936aac1 |
491 | drZ80.z80_irq_callback=NULL;\r |
492 | #endif\r |
493 | #ifdef _USE_CZ80\r |
a4221917 |
494 | memset(&CZ80, 0, sizeof(CZ80));\r |
495 | Cz80_Init(&CZ80);\r |
496 | Cz80_Set_Fetch(&CZ80, 0x0000, 0x1fff, (UINT32)Pico.zram); // main RAM\r |
c6196c0f |
497 | Cz80_Set_Fetch(&CZ80, 0x2000, 0x3fff, (UINT32)Pico.zram); // mirror\r |
b542be46 |
498 | Cz80_Set_ReadB(&CZ80, (UINT8 (*)(UINT32 address))z80_read); // unused (hacked in)\r |
a4221917 |
499 | Cz80_Set_WriteB(&CZ80, z80_write);\r |
9d917eea |
500 | Cz80_Set_INPort(&CZ80, z80_in);\r |
501 | Cz80_Set_OUTPort(&CZ80, z80_out);\r |
cc68a136 |
502 | #endif\r |
503 | }\r |
504 | \r |
eff55556 |
505 | PICO_INTERNAL void z80_reset(void)\r |
cc68a136 |
506 | {\r |
4936aac1 |
507 | #ifdef _USE_MZ80\r |
cc68a136 |
508 | mz80reset();\r |
4936aac1 |
509 | #endif\r |
510 | #ifdef _USE_DRZ80\r |
cc68a136 |
511 | memset(&drZ80, 0, 0x54);\r |
512 | drZ80.Z80F = (1<<2); // set ZFlag\r |
513 | drZ80.Z80F2 = (1<<2); // set ZFlag\r |
514 | drZ80.Z80IX = 0xFFFF << 16;\r |
515 | drZ80.Z80IY = 0xFFFF << 16;\r |
516 | drZ80.Z80IM = 0; // 1?\r |
4936aac1 |
517 | drZ80.z80irqvector = 0xff0000; // RST 38h\r |
cc68a136 |
518 | drZ80.Z80PC = drZ80.z80_rebasePC(0);\r |
519 | drZ80.Z80SP = drZ80.z80_rebaseSP(0x2000); // 0xf000 ?\r |
4936aac1 |
520 | #endif\r |
521 | #ifdef _USE_CZ80\r |
a4221917 |
522 | Cz80_Reset(&CZ80);\r |
c6196c0f |
523 | Cz80_Set_Reg(&CZ80, CZ80_IX, 0xffff);\r |
524 | Cz80_Set_Reg(&CZ80, CZ80_IY, 0xffff);\r |
525 | Cz80_Set_Reg(&CZ80, CZ80_SP, 0x2000);\r |
cc68a136 |
526 | #endif\r |
527 | Pico.m.z80_fakeval = 0; // for faking when Z80 is disabled\r |
528 | }\r |
529 | \r |
4936aac1 |
530 | #if 0\r |
531 | static int had_irq = 0, z80_ppc, z80_ops_done = 0;\r |
532 | int z80_cycles_left = 0;\r |
533 | \r |
534 | void z80_int(void)\r |
535 | {\r |
536 | had_irq = 1;\r |
537 | }\r |
538 | \r |
539 | static void xfail(void)\r |
540 | {\r |
541 | printf("PC: %04x, %04x\n", Cz80_Get_Reg(&CZ80, CZ80_PC), z80_ppc);\r |
542 | printf("z80_ops_done done: %i\n", z80_ops_done);\r |
543 | exit(1);\r |
544 | }\r |
545 | \r |
546 | int z80_run(int cycles)\r |
547 | {\r |
548 | int fail = 0;\r |
549 | int cdrz, ccz;\r |
550 | \r |
551 | z80_cycles_left = cycles;\r |
552 | z80_ppc = Cz80_Get_Reg(&CZ80, CZ80_PC);\r |
553 | \r |
554 | if (had_irq) {\r |
555 | printf("irq @ %04x\n", Cz80_Get_Reg(&CZ80, CZ80_PC));\r |
556 | Cz80_Set_IRQ(&CZ80, 0, HOLD_LINE);\r |
557 | drZ80.Z80_IRQ = 1;\r |
558 | had_irq = 0;\r |
559 | }\r |
560 | \r |
561 | while (z80_cycles_left > 0)\r |
562 | {\r |
563 | ccz = Cz80_Exec(&CZ80, 1);\r |
564 | cdrz = 1 - DrZ80Run(&drZ80, 1);\r |
565 | \r |
566 | if (drZ80.Z80_IRQ && (drZ80.Z80IF&1))\r |
567 | cdrz += 1 - DrZ80Run(&drZ80, 1); // cz80 processes IRQ after EI, DrZ80 does not\r |
568 | \r |
569 | if (cdrz != ccz) {\r |
570 | printf("cycles: %i vs %i\n", cdrz, ccz);\r |
571 | fail = 1;\r |
572 | }\r |
573 | \r |
574 | if (drZ80.Z80PC - drZ80.Z80PC_BASE != Cz80_Get_Reg(&CZ80, CZ80_PC)) {\r |
575 | printf("PC: %04x vs %04x\n", drZ80.Z80PC - drZ80.Z80PC_BASE, Cz80_Get_Reg(&CZ80, CZ80_PC));\r |
576 | fail = 1;\r |
577 | }\r |
578 | \r |
579 | if (fail) xfail();\r |
580 | \r |
581 | z80_ops_done++;\r |
582 | z80_cycles_left -= ccz;\r |
583 | z80_ppc = Cz80_Get_Reg(&CZ80, CZ80_PC);\r |
584 | }\r |
585 | \r |
586 | return co - z80_cycles_left;\r |
587 | }\r |
588 | #endif\r |
589 | \r |
cc68a136 |
590 | \r |
eff55556 |
591 | PICO_INTERNAL void z80_pack(unsigned char *data)\r |
cc68a136 |
592 | {\r |
593 | #if defined(_USE_MZ80)\r |
594 | struct mz80context mz80;\r |
595 | *(int *)data = 0x00005A6D; // "mZ"\r |
596 | mz80GetContext(&mz80);\r |
597 | memcpy(data+4, &mz80.z80clockticks, sizeof(mz80)-5*4); // don't save base&memhandlers\r |
598 | #elif defined(_USE_DRZ80)\r |
599 | *(int *)data = 0x015A7244; // "DrZ" v1\r |
600 | drZ80.Z80PC = drZ80.z80_rebasePC(drZ80.Z80PC-drZ80.Z80PC_BASE);\r |
601 | drZ80.Z80SP = drZ80.z80_rebaseSP(drZ80.Z80SP-drZ80.Z80SP_BASE);\r |
602 | memcpy(data+4, &drZ80, 0x54);\r |
a4221917 |
603 | #elif defined(_USE_CZ80)\r |
604 | *(int *)data = 0x00007a43; // "Cz"\r |
c5b61ac2 |
605 | *(int *)(data+4) = Cz80_Get_Reg(&CZ80, CZ80_PC);\r |
606 | memcpy(data+8, &CZ80, (INT32)&CZ80.BasePC - (INT32)&CZ80);\r |
cc68a136 |
607 | #endif\r |
608 | }\r |
609 | \r |
eff55556 |
610 | PICO_INTERNAL void z80_unpack(unsigned char *data)\r |
cc68a136 |
611 | {\r |
612 | #if defined(_USE_MZ80)\r |
a4221917 |
613 | if (*(int *)data == 0x00005A6D) { // "mZ" save?\r |
cc68a136 |
614 | struct mz80context mz80;\r |
615 | mz80GetContext(&mz80);\r |
616 | memcpy(&mz80.z80clockticks, data+4, sizeof(mz80)-5*4);\r |
617 | mz80SetContext(&mz80);\r |
618 | } else {\r |
619 | z80_reset();\r |
620 | z80_int();\r |
621 | }\r |
622 | #elif defined(_USE_DRZ80)\r |
a4221917 |
623 | if (*(int *)data == 0x015A7244) { // "DrZ" v1 save?\r |
cc68a136 |
624 | memcpy(&drZ80, data+4, 0x54);\r |
625 | // update bases\r |
626 | drZ80.Z80PC = drZ80.z80_rebasePC(drZ80.Z80PC-drZ80.Z80PC_BASE);\r |
627 | drZ80.Z80SP = drZ80.z80_rebaseSP(drZ80.Z80SP-drZ80.Z80SP_BASE);\r |
628 | } else {\r |
629 | z80_reset();\r |
630 | drZ80.Z80IM = 1;\r |
631 | z80_int(); // try to goto int handler, maybe we won't execute trash there?\r |
632 | }\r |
a4221917 |
633 | #elif defined(_USE_CZ80)\r |
c5b61ac2 |
634 | if (*(int *)data == 0x00007a43) { // "Cz" save?\r |
635 | memcpy(&CZ80, data+8, (INT32)&CZ80.BasePC - (INT32)&CZ80);\r |
636 | Cz80_Set_Reg(&CZ80, CZ80_PC, *(int *)(data+4));\r |
637 | } else {\r |
a4221917 |
638 | z80_reset();\r |
639 | z80_int();\r |
640 | }\r |
cc68a136 |
641 | #endif\r |
642 | }\r |
643 | \r |
eff55556 |
644 | PICO_INTERNAL void z80_exit(void)\r |
cc68a136 |
645 | {\r |
646 | #if defined(_USE_MZ80)\r |
647 | mz80shutdown();\r |
648 | #endif\r |
649 | }\r |
650 | \r |
1820b5a7 |
651 | #if 1 // defined(__DEBUG_PRINT) || defined(__GP2X__) || defined(__GIZ__)\r |
eff55556 |
652 | PICO_INTERNAL void z80_debug(char *dstr)\r |
cc68a136 |
653 | {\r |
654 | #if defined(_USE_DRZ80)\r |
0af33fe0 |
655 | sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", drZ80.Z80PC-drZ80.Z80PC_BASE, drZ80.Z80SP-drZ80.Z80SP_BASE);\r |
a4221917 |
656 | #elif defined(_USE_CZ80)\r |
657 | sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", CZ80.PC - CZ80.BasePC, CZ80.SP.W);\r |
cc68a136 |
658 | #endif\r |
659 | }\r |
660 | #endif\r |