| 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 |
| 17 | void (*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 |
| 20 | static int PsndBuffer[2*44100/50];\r |
| 21 | \r |
| 22 | // dac\r |
| 23 | static 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 |
| 26 | short cdda_out_buffer[2*1152];\r |
| 27 | \r |
| 28 | // for Pico\r |
| 29 | int PsndRate=0;\r |
| 30 | int PsndLen=0; // number of mono samples, multiply by 2 for stereo\r |
| 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 |
| 33 | int PsndDacLine=0;\r |
| 34 | short *PsndOut=NULL; // PCM data buffer\r |
| 35 | \r |
| 36 | // timers\r |
| 37 | int timer_a_next_oflow, timer_a_step; // in z80 cycles\r |
| 38 | int timer_b_next_oflow, timer_b_step;\r |
| 39 | \r |
| 40 | // sn76496\r |
| 41 | extern int *sn76496_regs;\r |
| 42 | \r |
| 43 | \r |
| 44 | static 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 |
| 108 | PICO_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 |
| 122 | void 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(0x200);\r |
| 135 | if (state == NULL) return;\r |
| 136 | memcpy(state, YM2612GetRegs(), 0x200);\r |
| 137 | }\r |
| 138 | YM2612Init(Pico.m.pal ? OSC_PAL/7 : OSC_NTSC/7, PsndRate);\r |
| 139 | if (preserve_state) {\r |
| 140 | // feed it back it's own registers, just like after loading state\r |
| 141 | memcpy(YM2612GetRegs(), state, 0x200);\r |
| 142 | ym2612_unpack_state();\r |
| 143 | if ((PicoAHW & PAHW_MCD) && !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))\r |
| 144 | cdda_start_play();\r |
| 145 | }\r |
| 146 | \r |
| 147 | if (preserve_state) memcpy(state, sn76496_regs, 28*4); // remember old state\r |
| 148 | SN76496_init(Pico.m.pal ? OSC_PAL/15 : OSC_NTSC/15, PsndRate);\r |
| 149 | if (preserve_state) memcpy(sn76496_regs, state, 28*4); // restore old state\r |
| 150 | \r |
| 151 | if (state)\r |
| 152 | free(state);\r |
| 153 | \r |
| 154 | // calculate PsndLen\r |
| 155 | PsndLen=PsndRate / target_fps;\r |
| 156 | PsndLen_exc_add=((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r |
| 157 | PsndLen_exc_cnt=0;\r |
| 158 | \r |
| 159 | // recalculate dac info\r |
| 160 | dac_recalculate();\r |
| 161 | \r |
| 162 | if (PicoAHW & PAHW_MCD)\r |
| 163 | pcm_set_rate(PsndRate);\r |
| 164 | \r |
| 165 | // clear all buffers\r |
| 166 | memset32(PsndBuffer, 0, sizeof(PsndBuffer)/4);\r |
| 167 | memset(cdda_out_buffer, 0, sizeof(cdda_out_buffer));\r |
| 168 | if (PsndOut)\r |
| 169 | PsndClear();\r |
| 170 | \r |
| 171 | // set mixer\r |
| 172 | PsndMix_32_to_16l = (PicoOpt & POPT_EN_STEREO) ? mix_32_to_16l_stereo : mix_32_to_16_mono;\r |
| 173 | \r |
| 174 | if (PicoAHW & PAHW_PICO)\r |
| 175 | PicoReratePico();\r |
| 176 | }\r |
| 177 | \r |
| 178 | \r |
| 179 | PICO_INTERNAL void PsndDoDAC(int line_to)\r |
| 180 | {\r |
| 181 | int pos, pos1, len;\r |
| 182 | int dout = ym2612.dacout;\r |
| 183 | int line_from = PsndDacLine;\r |
| 184 | \r |
| 185 | PsndDacLine = line_to + 1;\r |
| 186 | \r |
| 187 | pos =dac_info[line_from]>>4;\r |
| 188 | pos1=dac_info[line_to];\r |
| 189 | len = ((pos1>>4)-pos) + (pos1&0xf);\r |
| 190 | if (!len) return;\r |
| 191 | \r |
| 192 | if (PicoOpt & POPT_EN_STEREO) {\r |
| 193 | short *d = PsndOut + pos*2;\r |
| 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 |
| 198 | }\r |
| 199 | \r |
| 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 |
| 208 | \r |
| 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 |
| 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 |
| 282 | }\r |
| 283 | \r |
| 284 | \r |
| 285 | PICO_INTERNAL void PsndClear(void)\r |
| 286 | {\r |
| 287 | int len = PsndLen;\r |
| 288 | if (PsndLen_exc_add) len++;\r |
| 289 | if (PicoOpt & POPT_EN_STEREO)\r |
| 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 |
| 297 | }\r |
| 298 | \r |
| 299 | \r |
| 300 | static int PsndRender(int offset, int length)\r |
| 301 | {\r |
| 302 | int buf32_updated = 0;\r |
| 303 | int *buf32 = PsndBuffer+offset;\r |
| 304 | int stereo = (PicoOpt & 8) >> 3;\r |
| 305 | // emulating CD && PCM option enabled && PCM chip on && have enabled channels\r |
| 306 | int do_pcm = (PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_PCM) &&\r |
| 307 | (Pico_mcd->pcm.control & 0x80) && Pico_mcd->pcm.enabled;\r |
| 308 | offset <<= stereo;\r |
| 309 | \r |
| 310 | #if !SIMPLE_WRITE_SOUND\r |
| 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 |
| 319 | #endif\r |
| 320 | \r |
| 321 | // PSG\r |
| 322 | if (PicoOpt & POPT_EN_PSG)\r |
| 323 | SN76496Update(PsndOut+offset, length, stereo);\r |
| 324 | \r |
| 325 | if (PicoAHW & PAHW_PICO) {\r |
| 326 | PicoPicoPCMUpdate(PsndOut+offset, length, stereo);\r |
| 327 | return length;\r |
| 328 | }\r |
| 329 | \r |
| 330 | // Add in the stereo FM buffer\r |
| 331 | if (PicoOpt & POPT_EN_FM) {\r |
| 332 | buf32_updated = YM2612UpdateOne(buf32, length, stereo, 1);\r |
| 333 | } else\r |
| 334 | memset32(buf32, 0, length<<stereo);\r |
| 335 | \r |
| 336 | //printf("active_chs: %02x\n", buf32_updated);\r |
| 337 | \r |
| 338 | // CD: PCM sound\r |
| 339 | if (do_pcm) {\r |
| 340 | pcm_update(buf32, length, stereo);\r |
| 341 | //buf32_updated = 1;\r |
| 342 | }\r |
| 343 | \r |
| 344 | // CD: CDDA audio\r |
| 345 | // CD mode, cdda enabled, not data track, CDC is reading\r |
| 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 |
| 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 |
| 357 | \r |
| 358 | // convert + limit to normal 16bit output\r |
| 359 | PsndMix_32_to_16l(PsndOut+offset, buf32, length);\r |
| 360 | \r |
| 361 | return length;\r |
| 362 | }\r |
| 363 | \r |
| 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 |
| 393 | \r |
| 394 | // -----------------------------------------------------------------\r |
| 395 | // z80 stuff\r |
| 396 | \r |
| 397 | #ifdef _USE_MZ80\r |
| 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 |
| 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 |
| 428 | #endif\r |
| 429 | \r |
| 430 | #ifdef _USE_DRZ80\r |
| 431 | \r |
| 432 | struct DrZ80 drZ80;\r |
| 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 |
| 445 | #endif\r |
| 446 | \r |
| 447 | #if defined(_USE_DRZ80) || defined(_USE_CZ80)\r |
| 448 | static unsigned char z80_in(unsigned short p)\r |
| 449 | {\r |
| 450 | elprintf(EL_ANOMALY, "Z80 port %04x read", p);\r |
| 451 | return 0xff;\r |
| 452 | }\r |
| 453 | \r |
| 454 | static void z80_out(unsigned short p,unsigned char d)\r |
| 455 | {\r |
| 456 | elprintf(EL_ANOMALY, "Z80 port %04x write %02x", p, d);\r |
| 457 | }\r |
| 458 | #endif\r |
| 459 | \r |
| 460 | \r |
| 461 | // z80 functionality wrappers\r |
| 462 | PICO_INTERNAL void z80_init(void)\r |
| 463 | {\r |
| 464 | #ifdef _USE_MZ80\r |
| 465 | struct mz80context z80;\r |
| 466 | \r |
| 467 | // z80\r |
| 468 | mz80init();\r |
| 469 | // Modify the default context\r |
| 470 | mz80GetContext(&z80);\r |
| 471 | \r |
| 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 |
| 478 | \r |
| 479 | mz80SetContext(&z80);\r |
| 480 | #endif\r |
| 481 | #ifdef _USE_DRZ80\r |
| 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 |
| 486 | drZ80.z80_read16 =NULL;\r |
| 487 | drZ80.z80_write8 =z80_write;\r |
| 488 | drZ80.z80_write16 =NULL;\r |
| 489 | drZ80.z80_in =z80_in;\r |
| 490 | drZ80.z80_out =z80_out;\r |
| 491 | drZ80.z80_irq_callback=NULL;\r |
| 492 | #endif\r |
| 493 | #ifdef _USE_CZ80\r |
| 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 |
| 497 | Cz80_Set_Fetch(&CZ80, 0x2000, 0x3fff, (UINT32)Pico.zram); // mirror\r |
| 498 | Cz80_Set_ReadB(&CZ80, (UINT8 (*)(UINT32 address))z80_read); // unused (hacked in)\r |
| 499 | Cz80_Set_WriteB(&CZ80, z80_write);\r |
| 500 | Cz80_Set_INPort(&CZ80, z80_in);\r |
| 501 | Cz80_Set_OUTPort(&CZ80, z80_out);\r |
| 502 | #endif\r |
| 503 | }\r |
| 504 | \r |
| 505 | PICO_INTERNAL void z80_reset(void)\r |
| 506 | {\r |
| 507 | #ifdef _USE_MZ80\r |
| 508 | mz80reset();\r |
| 509 | #endif\r |
| 510 | #ifdef _USE_DRZ80\r |
| 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 |
| 517 | drZ80.z80irqvector = 0xff0000; // RST 38h\r |
| 518 | drZ80.Z80PC = drZ80.z80_rebasePC(0);\r |
| 519 | drZ80.Z80SP = drZ80.z80_rebaseSP(0x2000); // 0xf000 ?\r |
| 520 | #endif\r |
| 521 | #ifdef _USE_CZ80\r |
| 522 | Cz80_Reset(&CZ80);\r |
| 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 |
| 526 | #endif\r |
| 527 | Pico.m.z80_fakeval = 0; // for faking when Z80 is disabled\r |
| 528 | }\r |
| 529 | \r |
| 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 |
| 590 | \r |
| 591 | PICO_INTERNAL void z80_pack(unsigned char *data)\r |
| 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 |
| 603 | #elif defined(_USE_CZ80)\r |
| 604 | *(int *)data = 0x00007a43; // "Cz"\r |
| 605 | *(int *)(data+4) = Cz80_Get_Reg(&CZ80, CZ80_PC);\r |
| 606 | memcpy(data+8, &CZ80, (INT32)&CZ80.BasePC - (INT32)&CZ80);\r |
| 607 | #endif\r |
| 608 | }\r |
| 609 | \r |
| 610 | PICO_INTERNAL void z80_unpack(unsigned char *data)\r |
| 611 | {\r |
| 612 | #if defined(_USE_MZ80)\r |
| 613 | if (*(int *)data == 0x00005A6D) { // "mZ" save?\r |
| 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 |
| 623 | if (*(int *)data == 0x015A7244) { // "DrZ" v1 save?\r |
| 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 |
| 633 | #elif defined(_USE_CZ80)\r |
| 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 |
| 638 | z80_reset();\r |
| 639 | z80_int();\r |
| 640 | }\r |
| 641 | #endif\r |
| 642 | }\r |
| 643 | \r |
| 644 | PICO_INTERNAL void z80_exit(void)\r |
| 645 | {\r |
| 646 | #if defined(_USE_MZ80)\r |
| 647 | mz80shutdown();\r |
| 648 | #endif\r |
| 649 | }\r |
| 650 | \r |
| 651 | #if 1 // defined(__DEBUG_PRINT) || defined(__GP2X__) || defined(__GIZ__)\r |
| 652 | PICO_INTERNAL void z80_debug(char *dstr)\r |
| 653 | {\r |
| 654 | #if defined(_USE_DRZ80)\r |
| 655 | sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", drZ80.Z80PC-drZ80.Z80PC_BASE, drZ80.Z80SP-drZ80.Z80SP_BASE);\r |
| 656 | #elif defined(_USE_CZ80)\r |
| 657 | sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", CZ80.PC - CZ80.BasePC, CZ80.SP.W);\r |
| 658 | #endif\r |
| 659 | }\r |
| 660 | #endif\r |