| 1 | // This is part of Pico Library\r |
| 2 | \r |
| 3 | // (c) Copyright 2004 Dave, All rights reserved.\r |
| 4 | // (c) Copyright 2006 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 "PicoInt.h"\r |
| 11 | #include "sound/sound.h"\r |
| 12 | #include "sound/ym2612.h"\r |
| 13 | \r |
| 14 | int PicoVer=0x0110;\r |
| 15 | struct Pico Pico;\r |
| 16 | int PicoOpt=0; // disable everything by default\r |
| 17 | int PicoSkipFrame=0; // skip rendering frame?\r |
| 18 | int PicoRegionOverride = 0; // override the region detection 0: Auto, 1: Japan NTSC, 2: Japan PAL, 4: US, 8: Europe\r |
| 19 | int PicoAutoRgnOrder = 0;\r |
| 20 | int emustatus = 0;\r |
| 21 | void (*PicoWriteSound)(void) = 0; // called once per frame at the best time to send sound buffer (PsndOut) to hardware\r |
| 22 | \r |
| 23 | struct PicoSRAM SRam;\r |
| 24 | int z80startCycle = 0, z80stopCycle = 0; // in 68k cycles\r |
| 25 | //int z80ExtraCycles = 0;\r |
| 26 | int PicoPad[2]; // Joypads, format is SACB RLDU\r |
| 27 | int PicoMCD = 0; // mega CD status: scd_started, reset_pending\r |
| 28 | \r |
| 29 | // to be called once on emu init\r |
| 30 | int PicoInit(void)\r |
| 31 | {\r |
| 32 | // Blank space for state:\r |
| 33 | memset(&Pico,0,sizeof(Pico));\r |
| 34 | memset(&PicoPad,0,sizeof(PicoPad));\r |
| 35 | \r |
| 36 | // Init CPUs:\r |
| 37 | SekInit();\r |
| 38 | z80_init(); // init even if we aren't going to use it\r |
| 39 | \r |
| 40 | PicoInitMCD();\r |
| 41 | \r |
| 42 | // notaz: sram\r |
| 43 | SRam.data=0;\r |
| 44 | SRam.resize=1;\r |
| 45 | \r |
| 46 | return 0;\r |
| 47 | }\r |
| 48 | \r |
| 49 | // to be called once on emu exit\r |
| 50 | void PicoExit(void)\r |
| 51 | {\r |
| 52 | PicoExitMCD();\r |
| 53 | z80_exit();\r |
| 54 | \r |
| 55 | // notaz: sram\r |
| 56 | if(SRam.data) free(SRam.data); SRam.data=0;\r |
| 57 | }\r |
| 58 | \r |
| 59 | int PicoReset(int hard)\r |
| 60 | {\r |
| 61 | unsigned int region=0;\r |
| 62 | int support=0,hw=0,i=0;\r |
| 63 | unsigned char pal=0;\r |
| 64 | \r |
| 65 | if (Pico.romsize<=0) return 1;\r |
| 66 | \r |
| 67 | // setup correct memory map\r |
| 68 | if (PicoMCD & 1)\r |
| 69 | PicoMemSetupCD();\r |
| 70 | else PicoMemSetup();\r |
| 71 | PicoMemReset();\r |
| 72 | SekReset();\r |
| 73 | SekCycleCntT=0;\r |
| 74 | z80_reset();\r |
| 75 | \r |
| 76 | // reset VDP state, VRAM and PicoMisc\r |
| 77 | //memset(&Pico.video,0,sizeof(Pico.video));\r |
| 78 | //memset(&Pico.vram,0,sizeof(Pico.vram));\r |
| 79 | memset(&Pico.m,0,sizeof(Pico.m));\r |
| 80 | Pico.video.pending_ints=0;\r |
| 81 | emustatus = 0;\r |
| 82 | \r |
| 83 | if(hard) {\r |
| 84 | // clear all memory of the emulated machine\r |
| 85 | memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);\r |
| 86 | }\r |
| 87 | \r |
| 88 | // default VDP register values (based on Fusion)\r |
| 89 | Pico.video.reg[0] = Pico.video.reg[1] = 0x04;\r |
| 90 | Pico.video.reg[0xc] = 0x81;\r |
| 91 | Pico.video.reg[0xf] = 0x02;\r |
| 92 | Pico.m.dirtyPal = 1;\r |
| 93 | \r |
| 94 | if(PicoRegionOverride)\r |
| 95 | {\r |
| 96 | support = PicoRegionOverride;\r |
| 97 | }\r |
| 98 | else\r |
| 99 | {\r |
| 100 | // Read cartridge region data:\r |
| 101 | region=PicoRead32(0x1f0);\r |
| 102 | \r |
| 103 | for (i=0;i<4;i++)\r |
| 104 | {\r |
| 105 | int c=0;\r |
| 106 | \r |
| 107 | c=region>>(i<<3); c&=0xff;\r |
| 108 | if (c<=' ') continue;\r |
| 109 | \r |
| 110 | if (c=='J') support|=1;\r |
| 111 | else if (c=='U') support|=4;\r |
| 112 | else if (c=='E') support|=8;\r |
| 113 | else if (c=='j') {support|=1; break; }\r |
| 114 | else if (c=='u') {support|=4; break; }\r |
| 115 | else if (c=='e') {support|=8; break; }\r |
| 116 | else\r |
| 117 | {\r |
| 118 | // New style code:\r |
| 119 | char s[2]={0,0};\r |
| 120 | s[0]=(char)c;\r |
| 121 | support|=strtol(s,NULL,16);\r |
| 122 | }\r |
| 123 | }\r |
| 124 | }\r |
| 125 | \r |
| 126 | // auto detection order override\r |
| 127 | if (PicoAutoRgnOrder) {\r |
| 128 | if (((PicoAutoRgnOrder>>0)&0xf) & support) support = (PicoAutoRgnOrder>>0)&0xf;\r |
| 129 | else if (((PicoAutoRgnOrder>>4)&0xf) & support) support = (PicoAutoRgnOrder>>4)&0xf;\r |
| 130 | else if (((PicoAutoRgnOrder>>8)&0xf) & support) support = (PicoAutoRgnOrder>>8)&0xf;\r |
| 131 | }\r |
| 132 | \r |
| 133 | // Try to pick the best hardware value for English/50hz:\r |
| 134 | if (support&8) { hw=0xc0; pal=1; } // Europe\r |
| 135 | else if (support&4) hw=0x80; // USA\r |
| 136 | else if (support&2) { hw=0x40; pal=1; } // Japan PAL\r |
| 137 | else if (support&1) hw=0x00; // Japan NTSC\r |
| 138 | else hw=0x80; // USA\r |
| 139 | \r |
| 140 | Pico.m.hardware=(unsigned char)(hw|0x20); // No disk attached\r |
| 141 | Pico.m.pal=pal;\r |
| 142 | Pico.video.status = 0x3408 | pal; // always set bits | vblank | pal\r |
| 143 | \r |
| 144 | sound_reset(); // pal must be known here\r |
| 145 | \r |
| 146 | if (PicoMCD & 1) {\r |
| 147 | PicoResetMCD(hard);\r |
| 148 | SRam.data = 0;\r |
| 149 | return 0;\r |
| 150 | }\r |
| 151 | \r |
| 152 | \r |
| 153 | // notaz: sram\r |
| 154 | if(SRam.resize) {\r |
| 155 | int sram_size = 0;\r |
| 156 | if(SRam.data) free(SRam.data); SRam.data=0;\r |
| 157 | Pico.m.sram_reg = 0;\r |
| 158 | \r |
| 159 | if(*(Pico.rom+0x1B1) == 'R' && *(Pico.rom+0x1B0) == 'A') {\r |
| 160 | if(*(Pico.rom+0x1B2) & 0x40) {\r |
| 161 | // EEPROM SRAM\r |
| 162 | // what kind of EEPROMs are actually used? X24C02? X24C04? (X24C01 has only 128), but we will support up to 8K\r |
| 163 | SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games\r |
| 164 | SRam.end = PicoRead32(0x1B8);\r |
| 165 | sram_size = 0x2000;\r |
| 166 | Pico.m.sram_reg = 4;\r |
| 167 | } else {\r |
| 168 | // normal SRAM\r |
| 169 | SRam.start = PicoRead32(0x1B4) & 0xFFFF00;\r |
| 170 | SRam.end = PicoRead32(0x1B8) | 1;\r |
| 171 | sram_size = SRam.end - SRam.start + 1;\r |
| 172 | }\r |
| 173 | Pico.m.sram_reg |= 0x10; // SRAM was detected\r |
| 174 | }\r |
| 175 | if(sram_size <= 0) {\r |
| 176 | // some games may have bad headers, like S&K and Sonic3\r |
| 177 | SRam.start = 0x200000;\r |
| 178 | SRam.end = 0x203FFF;\r |
| 179 | sram_size = 0x004000;\r |
| 180 | }\r |
| 181 | \r |
| 182 | // enable sram access by default if it doesn't overlap with ROM\r |
| 183 | if(Pico.romsize <= SRam.start) Pico.m.sram_reg |= 1;\r |
| 184 | SRam.reg_back = Pico.m.sram_reg;\r |
| 185 | \r |
| 186 | if(sram_size) {\r |
| 187 | SRam.data = (unsigned char *) calloc(sram_size, 1);\r |
| 188 | if(!SRam.data) return 1;\r |
| 189 | }\r |
| 190 | SRam.resize=0;\r |
| 191 | // Dino Dini's Soccer malfunctions if SRAM is not filled with 0xff\r |
| 192 | if (strncmp((char *)Pico.rom+0x150, "IDOND NI'I", 10) == 0)\r |
| 193 | memset(SRam.data, 0xff, sram_size);\r |
| 194 | }\r |
| 195 | \r |
| 196 | Pico.m.sram_reg = SRam.reg_back; // restore sram_reg\r |
| 197 | SRam.changed = 0;\r |
| 198 | \r |
| 199 | return 0;\r |
| 200 | }\r |
| 201 | \r |
| 202 | static int dma_timings[] = {\r |
| 203 | 83, 167, 166, 83, // vblank: 32cell: dma2vram dma2[vs|c]ram vram_fill vram_copy\r |
| 204 | 102, 205, 204, 102, // vblank: 40cell:\r |
| 205 | 8, 16, 15, 8, // active: 32cell:\r |
| 206 | 9, 18, 17, 9 // ...\r |
| 207 | };\r |
| 208 | \r |
| 209 | static int dma_bsycles[] = {\r |
| 210 | (488<<8)/83, (488<<8)/167, (488<<8)/166, (488<<8)/83,\r |
| 211 | (488<<8)/102, (488<<8)/205, (488<<8)/204, (488<<8)/102,\r |
| 212 | (488<<8)/8, (488<<8)/16, (488<<8)/15, (488<<8)/8,\r |
| 213 | (488<<8)/9, (488<<8)/18, (488<<8)/17, (488<<8)/9\r |
| 214 | };\r |
| 215 | \r |
| 216 | //static\r |
| 217 | int CheckDMA(void)\r |
| 218 | {\r |
| 219 | int burn = 0, bytes_can = 0, dma_op = Pico.video.reg[0x17]>>6; // see gens for 00 and 01 modes\r |
| 220 | int bytes = Pico.m.dma_bytes;\r |
| 221 | int dma_op1;\r |
| 222 | \r |
| 223 | if(!(dma_op&2)) dma_op = (Pico.video.type==1) ? 0 : 1; // setting dma_timings offset here according to Gens\r |
| 224 | dma_op1 = dma_op;\r |
| 225 | if(Pico.video.reg[12] & 1) dma_op |= 4; // 40 cell mode?\r |
| 226 | if(!(Pico.video.status&8)&&(Pico.video.reg[1]&0x40)) dma_op|=8; // active display?\r |
| 227 | bytes_can = dma_timings[dma_op];\r |
| 228 | \r |
| 229 | if(bytes <= bytes_can) {\r |
| 230 | if(dma_op&2) Pico.video.status&=~2; // dma no longer busy\r |
| 231 | else {\r |
| 232 | burn = bytes * dma_bsycles[dma_op] >> 8; // have to be approximate because can't afford division..\r |
| 233 | //SekCycleCnt-=Pico.m.dma_endcycles;\r |
| 234 | //Pico.m.dma_endcycles = 0;\r |
| 235 | }\r |
| 236 | Pico.m.dma_bytes = 0;\r |
| 237 | } else {\r |
| 238 | if(!(dma_op&2)) burn = 488;\r |
| 239 | Pico.m.dma_bytes -= bytes_can;\r |
| 240 | }\r |
| 241 | \r |
| 242 | //SekCycleCnt+=burn;\r |
| 243 | dprintf("~Dma %i op=%i can=%i burn=%i [%i|%i]", Pico.m.dma_bytes, dma_op1, bytes_can, burn, Pico.m.scanline, SekCyclesDone());\r |
| 244 | //dprintf("~aim: %i, cnt: %i", SekCycleAim, SekCycleCnt);\r |
| 245 | return burn;\r |
| 246 | }\r |
| 247 | \r |
| 248 | static __inline void SekRun(int cyc)\r |
| 249 | {\r |
| 250 | int cyc_do;\r |
| 251 | SekCycleAim+=cyc;\r |
| 252 | //dprintf("aim: %i, cnt: %i", SekCycleAim, SekCycleCnt);\r |
| 253 | if((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return;\r |
| 254 | //dprintf("cyc_do: %i", cyc_do);\r |
| 255 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 256 | // this means we do run-compare Cyclone vs Musashi\r |
| 257 | SekCycleCnt+=CM_compareRun(cyc_do);\r |
| 258 | #elif defined(EMU_C68K)\r |
| 259 | PicoCpu.cycles=cyc_do;\r |
| 260 | CycloneRun(&PicoCpu);\r |
| 261 | SekCycleCnt+=cyc_do-PicoCpu.cycles;\r |
| 262 | #elif defined(EMU_A68K)\r |
| 263 | m68k_ICount=cyc_do;\r |
| 264 | M68000_RUN();\r |
| 265 | SekCycleCnt+=cyc_do-m68k_ICount;\r |
| 266 | #elif defined(EMU_M68K)\r |
| 267 | SekCycleCnt+=m68k_execute(cyc_do);\r |
| 268 | #endif\r |
| 269 | }\r |
| 270 | \r |
| 271 | static __inline void SekStep(void)\r |
| 272 | {\r |
| 273 | // this is required for timing sensitive stuff to work\r |
| 274 | int realaim=SekCycleAim; SekCycleAim=SekCycleCnt+1;\r |
| 275 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 276 | // this means we do run-compare Cyclone vs Musashi\r |
| 277 | SekCycleCnt+=CM_compareRun(1);\r |
| 278 | #elif defined(EMU_C68K)\r |
| 279 | PicoCpu.cycles=1;\r |
| 280 | CycloneRun(&PicoCpu);\r |
| 281 | SekCycleCnt+=1-PicoCpu.cycles;\r |
| 282 | #elif defined(EMU_A68K)\r |
| 283 | m68k_ICount=1;\r |
| 284 | M68000_RUN();\r |
| 285 | SekCycleCnt+=1-m68k_ICount;\r |
| 286 | #elif defined(EMU_M68K)\r |
| 287 | SekCycleCnt+=m68k_execute(1);\r |
| 288 | #endif\r |
| 289 | SekCycleAim=realaim;\r |
| 290 | }\r |
| 291 | \r |
| 292 | static int CheckIdle(void)\r |
| 293 | {\r |
| 294 | #if 1\r |
| 295 | unsigned char state[0x88];\r |
| 296 | \r |
| 297 | memset(state,0,sizeof(state));\r |
| 298 | \r |
| 299 | // See if the state is the same after 2 steps:\r |
| 300 | SekState(state); SekStep(); SekStep(); SekState(state+0x44);\r |
| 301 | if (memcmp(state,state+0x44,0x44)==0) return 1;\r |
| 302 | #else\r |
| 303 | unsigned char state[0x44];\r |
| 304 | static unsigned char oldstate[0x44];\r |
| 305 | \r |
| 306 | SekState(state);\r |
| 307 | if(memcmp(state,oldstate,0x40)==0) return 1;\r |
| 308 | memcpy(oldstate, state, 0x40);\r |
| 309 | #endif\r |
| 310 | \r |
| 311 | return 0;\r |
| 312 | }\r |
| 313 | \r |
| 314 | // to be called on 224 or line_sample scanlines only\r |
| 315 | static __inline void getSamples(int y)\r |
| 316 | {\r |
| 317 | if(y == 224) {\r |
| 318 | //dprintf("sta%i: %i [%i]", (emustatus & 2), emustatus, y);\r |
| 319 | if(emustatus & 2)\r |
| 320 | sound_render(PsndLen/2, PsndLen-PsndLen/2);\r |
| 321 | else sound_render(0, PsndLen);\r |
| 322 | if (emustatus&1) emustatus|=2; else emustatus&=~2;\r |
| 323 | if (PicoWriteSound) PicoWriteSound();\r |
| 324 | // clear sound buffer\r |
| 325 | memset(PsndOut, 0, (PicoOpt & 8) ? (PsndLen<<2) : (PsndLen<<1));\r |
| 326 | }\r |
| 327 | else if(emustatus & 3) {\r |
| 328 | emustatus|= 2;\r |
| 329 | emustatus&=~1;\r |
| 330 | sound_render(0, PsndLen/2);\r |
| 331 | }\r |
| 332 | }\r |
| 333 | \r |
| 334 | //extern UINT32 mz80GetRegisterValue(void *, UINT32);\r |
| 335 | \r |
| 336 | // Accurate but slower frame which does hints\r |
| 337 | static int PicoFrameHints(void)\r |
| 338 | {\r |
| 339 | struct PicoVideo *pv=&Pico.video;\r |
| 340 | int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample;\r |
| 341 | const int cycles_68k=488,cycles_z80=228; // both PAL and NTSC compile to same values\r |
| 342 | int skip=PicoSkipFrame || (PicoOpt&0x10);\r |
| 343 | int hint; // Hint counter\r |
| 344 | \r |
| 345 | if(Pico.m.pal) { //\r |
| 346 | //cycles_68k = (int) ((double) OSC_PAL / 7 / 50 / 312 + 0.4); // should compile to a constant (488)\r |
| 347 | //cycles_z80 = (int) ((double) OSC_PAL / 15 / 50 / 312 + 0.4); // 228\r |
| 348 | lines = 312; // Steve Snake says there are 313 lines, but this seems to also work well\r |
| 349 | line_sample = 68;\r |
| 350 | if(pv->reg[1]&8) lines_vis = 240;\r |
| 351 | } else {\r |
| 352 | //cycles_68k = (int) ((double) OSC_NTSC / 7 / 60 / 262 + 0.4); // 488\r |
| 353 | //cycles_z80 = (int) ((double) OSC_NTSC / 15 / 60 / 262 + 0.4); // 228\r |
| 354 | lines = 262;\r |
| 355 | line_sample = 93;\r |
| 356 | }\r |
| 357 | \r |
| 358 | SekCyclesReset();\r |
| 359 | //z80ExtraCycles = 0;\r |
| 360 | \r |
| 361 | if(PicoOpt&4)\r |
| 362 | z80CycleAim = 0;\r |
| 363 | // z80_resetCycles();\r |
| 364 | \r |
| 365 | pv->status&=~0x88; // clear V-Int, come out of vblank\r |
| 366 | \r |
| 367 | hint=pv->reg[10]; // Load H-Int counter\r |
| 368 | //dprintf("-hint: %i", hint);\r |
| 369 | \r |
| 370 | for (y=0;y<lines;y++)\r |
| 371 | {\r |
| 372 | Pico.m.scanline=(short)y;\r |
| 373 | \r |
| 374 | // pad delay (for 6 button pads)\r |
| 375 | if(PicoOpt&0x20) {\r |
| 376 | if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0;\r |
| 377 | if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0;\r |
| 378 | }\r |
| 379 | \r |
| 380 | // H-Interrupts:\r |
| 381 | if(y <= lines_vis && --hint < 0) // y <= lines_vis: Comix Zone, Golden Axe\r |
| 382 | {\r |
| 383 | //dprintf("rhint:old @ %06x", SekPc);\r |
| 384 | hint=pv->reg[10]; // Reload H-Int counter\r |
| 385 | pv->pending_ints|=0x10;\r |
| 386 | if (pv->reg[0]&0x10) SekInterrupt(4);\r |
| 387 | //dprintf("rhint: %i @ %06x [%i|%i]", hint, SekPc, y, SekCycleCnt);\r |
| 388 | //dprintf("hint_routine: %x", (*(unsigned short*)(Pico.ram+0x0B84)<<16)|*(unsigned short*)(Pico.ram+0x0B86));\r |
| 389 | }\r |
| 390 | \r |
| 391 | // V-Interrupt:\r |
| 392 | if (y == lines_vis)\r |
| 393 | {\r |
| 394 | dprintf("vint: @ %06x [%i|%i], aim=%i cnt=%i", SekPc, y, SekCycleCnt, SekCycleAim, SekCycleCnt);\r |
| 395 | pv->status|=0x08; // go into vblank\r |
| 396 | if(!Pico.m.dma_bytes||(Pico.video.reg[0x17]&0x80)) {\r |
| 397 | // there must be a gap between H and V ints, also after vblank bit set (Mazin Saga, Bram Stoker's Dracula)\r |
| 398 | SekRun(128); SekCycleAim-=128; // 128; ?\r |
| 399 | }\r |
| 400 | dprintf("[%i|%i], aim=%i cnt=%i @ %x", y, SekCycleCnt, SekCycleAim, SekCycleCnt, SekPc);\r |
| 401 | pv->status|=0x80; // V-Int happened\r |
| 402 | pv->pending_ints|=0x20;\r |
| 403 | if(pv->reg[1]&0x20) SekInterrupt(6);\r |
| 404 | if(Pico.m.z80Run && (PicoOpt&4)) // ?\r |
| 405 | z80_int();\r |
| 406 | //dprintf("zint: [%i|%i] zPC=%04x", Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0));\r |
| 407 | }\r |
| 408 | \r |
| 409 | // decide if we draw this line\r |
| 410 | #if CAN_HANDLE_240_LINES\r |
| 411 | if(!skip && ((!(pv->reg[1]&8) && y<224) || ((pv->reg[1]&8) && y<240)) )\r |
| 412 | #else\r |
| 413 | if(!skip && y<224)\r |
| 414 | #endif\r |
| 415 | PicoLine(y);\r |
| 416 | \r |
| 417 | if(PicoOpt&1)\r |
| 418 | sound_timers_and_dac(y);\r |
| 419 | \r |
| 420 | // get samples from sound chips\r |
| 421 | if(y == 32 && PsndOut)\r |
| 422 | emustatus &= ~1;\r |
| 423 | else if((y == 224 || y == line_sample) && PsndOut)\r |
| 424 | getSamples(y);\r |
| 425 | \r |
| 426 | // Run scanline:\r |
| 427 | if(Pico.m.dma_bytes) SekCycleCnt+=CheckDMA();\r |
| 428 | SekRun(cycles_68k);\r |
| 429 | if((PicoOpt&4) && Pico.m.z80Run) {\r |
| 430 | Pico.m.z80Run|=2;\r |
| 431 | z80CycleAim+=cycles_z80;\r |
| 432 | total_z80+=z80_run(z80CycleAim-total_z80);\r |
| 433 | }\r |
| 434 | }\r |
| 435 | \r |
| 436 | // draw a frame just after vblank in alternative render mode\r |
| 437 | if(!PicoSkipFrame && (PicoOpt&0x10))\r |
| 438 | PicoFrameFull();\r |
| 439 | \r |
| 440 | return 0;\r |
| 441 | }\r |
| 442 | \r |
| 443 | // helper z80 runner\r |
| 444 | static void PicoRunZ80Simple(int line_from, int line_to)\r |
| 445 | {\r |
| 446 | int line_from_r=line_from, line_to_r=line_to, line = line_from;\r |
| 447 | int line_sample = Pico.m.pal ? 68 : 93;\r |
| 448 | extern const unsigned short vcounts[];\r |
| 449 | \r |
| 450 | if(!(PicoOpt&4) || Pico.m.z80Run == 0) { line_from_r = line_to_r; line_to_r = 0; }\r |
| 451 | \r |
| 452 | if(z80startCycle != 0) {\r |
| 453 | line_from_r = vcounts[z80startCycle>>8]+1;\r |
| 454 | z80startCycle = 0;\r |
| 455 | }\r |
| 456 | if(z80stopCycle != 0) {\r |
| 457 | line_to_r = vcounts[z80stopCycle>>8]+1;\r |
| 458 | z80stopCycle = 0;\r |
| 459 | }\r |
| 460 | \r |
| 461 | if(PicoOpt&1) {\r |
| 462 | // we have ym2612 enabled, so we have to run Z80 in lines, so we could update DAC and timers\r |
| 463 | for(; line < line_to; line++) {\r |
| 464 | sound_timers_and_dac(line);\r |
| 465 | if((line == 224 || line == line_sample) && PsndOut) getSamples(line);\r |
| 466 | if(line == 32 && PsndOut) emustatus &= ~1;\r |
| 467 | if(line >= line_from_r && line < line_to_r)\r |
| 468 | z80_run(228);\r |
| 469 | }\r |
| 470 | } else if(line_to_r-line_from_r > 0) {\r |
| 471 | z80_run(228*(line_to_r-line_from_r));\r |
| 472 | // samples will be taken by caller\r |
| 473 | }\r |
| 474 | }\r |
| 475 | \r |
| 476 | // Simple frame without H-Ints\r |
| 477 | static int PicoFrameSimple(void)\r |
| 478 | {\r |
| 479 | struct PicoVideo *pv=&Pico.video;\r |
| 480 | int y=0,line=0,lines=0,lines_step=0,sects;\r |
| 481 | int cycles_68k_vblock,cycles_68k_block;\r |
| 482 | \r |
| 483 | if(Pico.m.pal) {\r |
| 484 | // M68k cycles/frame: 152009.78\r |
| 485 | if(pv->reg[1]&8) { // 240 lines\r |
| 486 | cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 15 + 0.4); // 16 sects, 16*15=240, 7308\r |
| 487 | cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 24 + 0.4); // 3 sects, 3*24=72, 35163?\r |
| 488 | lines_step = 15;\r |
| 489 | } else {\r |
| 490 | cycles_68k_block = (int) ((double) OSC_PAL / 7 / 50 / 312 * 14 + 0.4); // 16*14=224\r |
| 491 | cycles_68k_vblock = (int) ((double) OSC_PAL / 7 / 50 / 312 * 22 + 0.4); // 4 sects, 4*22=88\r |
| 492 | lines_step = 14;\r |
| 493 | }\r |
| 494 | } else {\r |
| 495 | // M68k cycles/frame: 127840.71\r |
| 496 | cycles_68k_block = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 14 + 0.4); // 16*14=224, 6831\r |
| 497 | cycles_68k_vblock = (int) ((double) OSC_NTSC / 7 / 60 / 262 * 19 + 0.4); // 2 sects, 2*19=38, 18544\r |
| 498 | lines_step = 14;\r |
| 499 | }\r |
| 500 | \r |
| 501 | Pico.m.scanline=-1;\r |
| 502 | \r |
| 503 | SekCyclesReset();\r |
| 504 | \r |
| 505 | if(PicoOpt&4)\r |
| 506 | z80_resetCycles();\r |
| 507 | \r |
| 508 | // 6 button pad: let's just say it timed out now\r |
| 509 | Pico.m.padTHPhase[0]=Pico.m.padTHPhase[1]=0;\r |
| 510 | \r |
| 511 | // ---- Active Scan ----\r |
| 512 | pv->status&=~88; // clear V-Int, come out of vblank\r |
| 513 | \r |
| 514 | // Run in sections:\r |
| 515 | for(sects=16; sects; sects--)\r |
| 516 | {\r |
| 517 | if (CheckIdle()) break;\r |
| 518 | \r |
| 519 | lines += lines_step;\r |
| 520 | SekRun(cycles_68k_block);\r |
| 521 | \r |
| 522 | PicoRunZ80Simple(line, lines);\r |
| 523 | line=lines;\r |
| 524 | }\r |
| 525 | \r |
| 526 | // run Z80 for remaining sections\r |
| 527 | if(sects) {\r |
| 528 | int c = sects*cycles_68k_block;\r |
| 529 | \r |
| 530 | lines += sects*lines_step;\r |
| 531 | PicoRunZ80Simple(line, lines);\r |
| 532 | // this is for approriate line counter, etc\r |
| 533 | SekCycleCnt += c;\r |
| 534 | SekCycleAim += c;\r |
| 535 | }\r |
| 536 | \r |
| 537 | // here we render sound if ym2612 is disabled\r |
| 538 | if(!(PicoOpt&1) && PsndOut) {\r |
| 539 | sound_render(0, PsndLen);\r |
| 540 | if(PicoWriteSound) PicoWriteSound();\r |
| 541 | // clear sound buffer\r |
| 542 | memset(PsndOut, 0, (PicoOpt & 8) ? (PsndLen<<2) : (PsndLen<<1));\r |
| 543 | }\r |
| 544 | \r |
| 545 | // render screen\r |
| 546 | if(!PicoSkipFrame) {\r |
| 547 | if(!(PicoOpt&0x10))\r |
| 548 | // Draw the screen\r |
| 549 | #if CAN_HANDLE_240_LINES\r |
| 550 | if(pv->reg[1]&8) {\r |
| 551 | for (y=0;y<240;y++) PicoLine(y);\r |
| 552 | } else {\r |
| 553 | for (y=0;y<224;y++) PicoLine(y);\r |
| 554 | }\r |
| 555 | #else\r |
| 556 | for (y=0;y<224;y++) PicoLine(y);\r |
| 557 | #endif\r |
| 558 | else PicoFrameFull();\r |
| 559 | }\r |
| 560 | \r |
| 561 | // ---- V-Blanking period ----\r |
| 562 | // fix line counts\r |
| 563 | if(Pico.m.pal) {\r |
| 564 | if(pv->reg[1]&8) { // 240 lines\r |
| 565 | lines = line = 240;\r |
| 566 | sects = 3;\r |
| 567 | lines_step = 24;\r |
| 568 | } else {\r |
| 569 | lines = line = 224;\r |
| 570 | sects = 4;\r |
| 571 | lines_step = 22;\r |
| 572 | }\r |
| 573 | } else {\r |
| 574 | lines = line = 224;\r |
| 575 | sects = 2;\r |
| 576 | lines_step = 19;\r |
| 577 | }\r |
| 578 | \r |
| 579 | //dprintf("vint: @ %06x [%i]", SekPc, SekCycleCnt);\r |
| 580 | pv->pending_ints|=0x20;\r |
| 581 | if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ\r |
| 582 | pv->status|=0x88; // V-Int happened / go into vblank\r |
| 583 | if(Pico.m.z80Run && (PicoOpt&4)) // ?\r |
| 584 | z80_int();\r |
| 585 | \r |
| 586 | while(sects) {\r |
| 587 | lines += lines_step;\r |
| 588 | \r |
| 589 | SekRun(cycles_68k_vblock);\r |
| 590 | \r |
| 591 | PicoRunZ80Simple(line, lines);\r |
| 592 | line=lines;\r |
| 593 | \r |
| 594 | sects--;\r |
| 595 | if(sects && CheckIdle()) break;\r |
| 596 | }\r |
| 597 | \r |
| 598 | // run Z80 for remaining sections\r |
| 599 | if(sects) {\r |
| 600 | lines += sects*lines_step;\r |
| 601 | PicoRunZ80Simple(line, lines);\r |
| 602 | }\r |
| 603 | \r |
| 604 | return 0;\r |
| 605 | }\r |
| 606 | \r |
| 607 | int PicoFrame(void)\r |
| 608 | {\r |
| 609 | int acc;\r |
| 610 | \r |
| 611 | Pico.m.frame_count++;\r |
| 612 | \r |
| 613 | if (PicoMCD & 1) {\r |
| 614 | PicoFrameMCD();\r |
| 615 | return 0;\r |
| 616 | }\r |
| 617 | \r |
| 618 | // be accurate if we are asked for this\r |
| 619 | if(PicoOpt&0x40) acc=1;\r |
| 620 | // don't be accurate in alternative render mode, as hint effects will not be rendered anyway\r |
| 621 | else if(PicoOpt&0x10) acc = 0;\r |
| 622 | else acc=Pico.video.reg[0]&0x10; // be accurate if hints are used\r |
| 623 | \r |
| 624 | //if(Pico.video.reg[12]&0x2) Pico.video.status ^= 0x10; // change odd bit in interlace mode\r |
| 625 | \r |
| 626 | if(!(PicoOpt&0x10))\r |
| 627 | PicoFrameStart();\r |
| 628 | \r |
| 629 | if(acc)\r |
| 630 | PicoFrameHints();\r |
| 631 | else PicoFrameSimple();\r |
| 632 | \r |
| 633 | return 0;\r |
| 634 | }\r |
| 635 | \r |
| 636 | static int DefaultCram(int cram)\r |
| 637 | {\r |
| 638 | int high=0x0841;\r |
| 639 | // Convert 0000bbbb ggggrrrr\r |
| 640 | // to rrrr1ggg g10bbbb1\r |
| 641 | high|=(cram&0x00f)<<12; // Red\r |
| 642 | high|=(cram&0x0f0)<< 3; // Green\r |
| 643 | high|=(cram&0xf00)>> 7; // Blue\r |
| 644 | return high;\r |
| 645 | }\r |
| 646 | \r |
| 647 | // Function to convert Megadrive Cram into a native colour:\r |
| 648 | int (*PicoCram)(int cram)=DefaultCram;\r |
| 649 | \r |
| 650 | #if defined(__DEBUG_PRINT) || defined(WIN32)\r |
| 651 | // tmp debug: dump some stuff\r |
| 652 | #define bit(r, x) ((r>>x)&1)\r |
| 653 | void z80_debug(char *dstr);\r |
| 654 | char *debugString()\r |
| 655 | {\r |
| 656 | #if 1\r |
| 657 | static char dstr[1024];\r |
| 658 | unsigned char *reg=Pico.video.reg, r;\r |
| 659 | \r |
| 660 | // dump some info\r |
| 661 | sprintf(dstr, "mode set 1: %02x\n", (r=reg[0]));\r |
| 662 | sprintf(dstr, "%sdisplay_disable: %i, M3: %i, palette: %i, ?, hints: %i\n\n", dstr, bit(r,0), bit(r,1), bit(r,2), bit(r,4));\r |
| 663 | sprintf(dstr, "%smode set 2: %02x\n", dstr, (r=reg[1]));\r |
| 664 | sprintf(dstr, "%sSMS/genesis: %i, pal: %i, dma: %i, vints: %i, disp: %i, TMS9918: %i\n\n",dstr, bit(r,2), bit(r,3), bit(r,4), bit(r,5), bit(r,6), bit(r,7));\r |
| 665 | sprintf(dstr, "%smode set 3: %02x\n", dstr, (r=reg[0xB]));\r |
| 666 | sprintf(dstr, "%sLSCR: %i, HSCR: %i, 2cell vscroll: %i, IE2: %i\n\n", dstr, bit(r,0), bit(r,1), bit(r,2), bit(r,3));\r |
| 667 | sprintf(dstr, "%smode set 4: %02x\n", dstr, (r=reg[0xC]));\r |
| 668 | sprintf(dstr, "%sinterlace: %i%i; cells: %i; shadow: %i\n\n", dstr, bit(r,2), bit(r,1), (r&0x80) ? 40 : 32, bit(r,3));\r |
| 669 | sprintf(dstr, "%sscroll size: w: %i; h: %i\n\n", dstr, reg[0x10]&3, (reg[0x10]&0x30)>>4);\r |
| 670 | sprintf(dstr, "%sSRAM: det: %i; eeprom: %i\n", dstr, bit(Pico.m.sram_reg, 4), bit(Pico.m.sram_reg, 2));\r |
| 671 | sprintf(dstr, "%sCPU state: PC: %06x cycles: %i\n", dstr, SekPc, SekCyclesDoneT());\r |
| 672 | #ifdef EMU_C68K\r |
| 673 | for(r=0; r < 8; r++)\r |
| 674 | sprintf(dstr, "%sd%i=%08x, a%i=%08x\n", dstr, r, PicoCpu.d[r], r, PicoCpu.a[r]);\r |
| 675 | #endif\r |
| 676 | z80_debug(dstr);\r |
| 677 | \r |
| 678 | #else\r |
| 679 | struct PicoVideo *pvid=&Pico.video;\r |
| 680 | int table=0;\r |
| 681 | int i,u,n,link=0;\r |
| 682 | static char dstr[1024*8];\r |
| 683 | dstr[0] = 0;\r |
| 684 | \r |
| 685 | table=pvid->reg[5]&0x7f;\r |
| 686 | if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r |
| 687 | table<<=8; // Get sprite table address/2\r |
| 688 | \r |
| 689 | for (i=u=n=0; u < 80 && n < 20; u++)\r |
| 690 | {\r |
| 691 | unsigned int *sprite;\r |
| 692 | int code, code2, sx, sy, height;\r |
| 693 | \r |
| 694 | sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r |
| 695 | \r |
| 696 | // get sprite info\r |
| 697 | code = sprite[0];\r |
| 698 | \r |
| 699 | // check if it is on this line\r |
| 700 | sy = (code&0x1ff);//-0x80;\r |
| 701 | height = ((code>>24)&3)+1;\r |
| 702 | \r |
| 703 | // masking sprite?\r |
| 704 | code2 = sprite[1];\r |
| 705 | sx = (code2>>16)&0x1ff;\r |
| 706 | \r |
| 707 | dprintf("#%02i x: %03i y: %03i %ix%i", u, sx, sy, ((code>>26)&3)+1, height);\r |
| 708 | \r |
| 709 | link=(code>>16)&0x7f;\r |
| 710 | if(!link) break; // End of sprites\r |
| 711 | }\r |
| 712 | #endif\r |
| 713 | \r |
| 714 | #if 0\r |
| 715 | {\r |
| 716 | FILE *f = fopen("zram", "wb");\r |
| 717 | fwrite(Pico.zram, 1, 0x2000, f);\r |
| 718 | fclose(f);\r |
| 719 | }\r |
| 720 | #endif\r |
| 721 | \r |
| 722 | return dstr;\r |
| 723 | }\r |
| 724 | #endif\r |