| 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/ym2612.h"\r |
| 12 | \r |
| 13 | int PicoVer=0x0133;\r |
| 14 | struct Pico Pico;\r |
| 15 | int PicoOpt=0; // disable everything by default\r |
| 16 | int PicoSkipFrame=0; // skip rendering frame?\r |
| 17 | int PicoRegionOverride = 0; // override the region detection 0: Auto, 1: Japan NTSC, 2: Japan PAL, 4: US, 8: Europe\r |
| 18 | int PicoAutoRgnOrder = 0;\r |
| 19 | int emustatus = 0; // rapid_ym2612, multi_ym_updates\r |
| 20 | void (*PicoWriteSound)(int len) = 0; // called once per frame at the best time to send sound buffer (PsndOut) to hardware\r |
| 21 | \r |
| 22 | struct PicoSRAM SRam = {0,};\r |
| 23 | int z80startCycle, z80stopCycle; // in 68k cycles\r |
| 24 | int PicoPad[2]; // Joypads, format is SACB RLDU\r |
| 25 | int PicoMCD = 0; // mega CD status: scd_started\r |
| 26 | \r |
| 27 | // to be called once on emu init\r |
| 28 | int PicoInit(void)\r |
| 29 | {\r |
| 30 | // Blank space for state:\r |
| 31 | memset(&Pico,0,sizeof(Pico));\r |
| 32 | memset(&PicoPad,0,sizeof(PicoPad));\r |
| 33 | \r |
| 34 | // Init CPUs:\r |
| 35 | SekInit();\r |
| 36 | z80_init(); // init even if we aren't going to use it\r |
| 37 | \r |
| 38 | PicoInitMCD();\r |
| 39 | \r |
| 40 | SRam.data=0;\r |
| 41 | \r |
| 42 | return 0;\r |
| 43 | }\r |
| 44 | \r |
| 45 | // to be called once on emu exit\r |
| 46 | void PicoExit(void)\r |
| 47 | {\r |
| 48 | if (PicoMCD&1)\r |
| 49 | PicoExitMCD();\r |
| 50 | z80_exit();\r |
| 51 | \r |
| 52 | if(SRam.data) free(SRam.data); SRam.data=0;\r |
| 53 | }\r |
| 54 | \r |
| 55 | int PicoReset(int hard)\r |
| 56 | {\r |
| 57 | unsigned int region=0;\r |
| 58 | int support=0,hw=0,i=0;\r |
| 59 | unsigned char pal=0;\r |
| 60 | unsigned char sram_reg=Pico.m.sram_reg; // must be preserved\r |
| 61 | \r |
| 62 | if (Pico.romsize<=0) return 1;\r |
| 63 | \r |
| 64 | PicoMemReset();\r |
| 65 | SekReset();\r |
| 66 | // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).\r |
| 67 | SekSetRealTAS(PicoMCD & 1);\r |
| 68 | SekCycleCntT=0;\r |
| 69 | z80_reset();\r |
| 70 | \r |
| 71 | // reset VDP state, VRAM and PicoMisc\r |
| 72 | //memset(&Pico.video,0,sizeof(Pico.video));\r |
| 73 | //memset(&Pico.vram,0,sizeof(Pico.vram));\r |
| 74 | memset(Pico.ioports,0,sizeof(Pico.ioports)); // needed for MCD to reset properly\r |
| 75 | memset(&Pico.m,0,sizeof(Pico.m));\r |
| 76 | Pico.video.pending_ints=0;\r |
| 77 | emustatus = 0;\r |
| 78 | \r |
| 79 | if(hard) {\r |
| 80 | // clear all memory of the emulated machine\r |
| 81 | memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);\r |
| 82 | }\r |
| 83 | \r |
| 84 | // default VDP register values (based on Fusion)\r |
| 85 | Pico.video.reg[0] = Pico.video.reg[1] = 0x04;\r |
| 86 | Pico.video.reg[0xc] = 0x81;\r |
| 87 | Pico.video.reg[0xf] = 0x02;\r |
| 88 | Pico.m.dirtyPal = 1;\r |
| 89 | \r |
| 90 | if(PicoRegionOverride)\r |
| 91 | {\r |
| 92 | support = PicoRegionOverride;\r |
| 93 | }\r |
| 94 | else\r |
| 95 | {\r |
| 96 | // Read cartridge region data:\r |
| 97 | region=PicoRead32(0x1f0);\r |
| 98 | \r |
| 99 | for (i=0;i<4;i++)\r |
| 100 | {\r |
| 101 | int c=0;\r |
| 102 | \r |
| 103 | c=region>>(i<<3); c&=0xff;\r |
| 104 | if (c<=' ') continue;\r |
| 105 | \r |
| 106 | if (c=='J') support|=1;\r |
| 107 | else if (c=='U') support|=4;\r |
| 108 | else if (c=='E') support|=8;\r |
| 109 | else if (c=='j') {support|=1; break; }\r |
| 110 | else if (c=='u') {support|=4; break; }\r |
| 111 | else if (c=='e') {support|=8; break; }\r |
| 112 | else\r |
| 113 | {\r |
| 114 | // New style code:\r |
| 115 | char s[2]={0,0};\r |
| 116 | s[0]=(char)c;\r |
| 117 | support|=strtol(s,NULL,16);\r |
| 118 | }\r |
| 119 | }\r |
| 120 | }\r |
| 121 | \r |
| 122 | // auto detection order override\r |
| 123 | if (PicoAutoRgnOrder) {\r |
| 124 | if (((PicoAutoRgnOrder>>0)&0xf) & support) support = (PicoAutoRgnOrder>>0)&0xf;\r |
| 125 | else if (((PicoAutoRgnOrder>>4)&0xf) & support) support = (PicoAutoRgnOrder>>4)&0xf;\r |
| 126 | else if (((PicoAutoRgnOrder>>8)&0xf) & support) support = (PicoAutoRgnOrder>>8)&0xf;\r |
| 127 | }\r |
| 128 | \r |
| 129 | // Try to pick the best hardware value for English/50hz:\r |
| 130 | if (support&8) { hw=0xc0; pal=1; } // Europe\r |
| 131 | else if (support&4) hw=0x80; // USA\r |
| 132 | else if (support&2) { hw=0x40; pal=1; } // Japan PAL\r |
| 133 | else if (support&1) hw=0x00; // Japan NTSC\r |
| 134 | else hw=0x80; // USA\r |
| 135 | \r |
| 136 | Pico.m.hardware=(unsigned char)(hw|0x20); // No disk attached\r |
| 137 | Pico.m.pal=pal;\r |
| 138 | Pico.video.status = 0x3408 | pal; // always set bits | vblank | pal\r |
| 139 | \r |
| 140 | sound_reset(); // pal must be known here\r |
| 141 | \r |
| 142 | if (PicoMCD & 1) {\r |
| 143 | PicoResetMCD(hard);\r |
| 144 | return 0;\r |
| 145 | }\r |
| 146 | \r |
| 147 | // reset sram state; enable sram access by default if it doesn't overlap with ROM\r |
| 148 | Pico.m.sram_reg=sram_reg&0x14;\r |
| 149 | if (!(Pico.m.sram_reg&4) && Pico.romsize <= SRam.start) Pico.m.sram_reg |= 1;\r |
| 150 | \r |
| 151 | elprintf(EL_STATUS, "sram: det: %i; eeprom: %i; start: %06x; end: %06x",\r |
| 152 | (Pico.m.sram_reg>>4)&1, (Pico.m.sram_reg>>2)&1, SRam.start, SRam.end);\r |
| 153 | \r |
| 154 | return 0;\r |
| 155 | }\r |
| 156 | \r |
| 157 | \r |
| 158 | // dma2vram settings are just hacks to unglitch Legend of Galahad (needs <= 104 to work)\r |
| 159 | // same for Outrunners (92-121, when active is set to 24)\r |
| 160 | static const int dma_timings[] = {\r |
| 161 | 83, 167, 166, 83, // vblank: 32cell: dma2vram dma2[vs|c]ram vram_fill vram_copy\r |
| 162 | 102, 205, 204, 102, // vblank: 40cell:\r |
| 163 | 16, 16, 15, 8, // active: 32cell:\r |
| 164 | 24, 18, 17, 9 // ...\r |
| 165 | };\r |
| 166 | \r |
| 167 | static const int dma_bsycles[] = {\r |
| 168 | (488<<8)/82, (488<<8)/167, (488<<8)/166, (488<<8)/83,\r |
| 169 | (488<<8)/102, (488<<8)/205, (488<<8)/204, (488<<8)/102,\r |
| 170 | (488<<8)/16, (488<<8)/16, (488<<8)/15, (488<<8)/8,\r |
| 171 | (488<<8)/24, (488<<8)/18, (488<<8)/17, (488<<8)/9\r |
| 172 | };\r |
| 173 | \r |
| 174 | PICO_INTERNAL int CheckDMA(void)\r |
| 175 | {\r |
| 176 | int burn = 0, xfers_can, dma_op = Pico.video.reg[0x17]>>6; // see gens for 00 and 01 modes\r |
| 177 | int xfers = Pico.m.dma_xfers;\r |
| 178 | int dma_op1;\r |
| 179 | \r |
| 180 | if(!(dma_op&2)) dma_op = (Pico.video.type==1) ? 0 : 1; // setting dma_timings offset here according to Gens\r |
| 181 | dma_op1 = dma_op;\r |
| 182 | if(Pico.video.reg[12] & 1) dma_op |= 4; // 40 cell mode?\r |
| 183 | if(!(Pico.video.status&8)&&(Pico.video.reg[1]&0x40)) dma_op|=8; // active display?\r |
| 184 | xfers_can = dma_timings[dma_op];\r |
| 185 | if(xfers <= xfers_can) {\r |
| 186 | if(dma_op&2) Pico.video.status&=~2; // dma no longer busy\r |
| 187 | else {\r |
| 188 | burn = xfers * dma_bsycles[dma_op] >> 8; // have to be approximate because can't afford division..\r |
| 189 | }\r |
| 190 | Pico.m.dma_xfers = 0;\r |
| 191 | } else {\r |
| 192 | if(!(dma_op&2)) burn = 488;\r |
| 193 | Pico.m.dma_xfers -= xfers_can;\r |
| 194 | }\r |
| 195 | \r |
| 196 | elprintf(EL_VDPDMA, "~Dma %i op=%i can=%i burn=%i [%i]", Pico.m.dma_xfers, dma_op1, xfers_can, burn, SekCyclesDone());\r |
| 197 | //dprintf("~aim: %i, cnt: %i", SekCycleAim, SekCycleCnt);\r |
| 198 | return burn;\r |
| 199 | }\r |
| 200 | \r |
| 201 | static __inline void SekRunM68k(int cyc)\r |
| 202 | {\r |
| 203 | int cyc_do;\r |
| 204 | SekCycleAim+=cyc;\r |
| 205 | //printf("aim: %i, cnt: %i\n", SekCycleAim, SekCycleCnt);\r |
| 206 | if((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return;\r |
| 207 | //printf("cyc_do: %i\n", cyc_do);\r |
| 208 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 209 | // this means we do run-compare Cyclone vs Musashi\r |
| 210 | SekCycleCnt+=CM_compareRun(cyc_do);\r |
| 211 | #elif defined(EMU_C68K)\r |
| 212 | PicoCpu.cycles=cyc_do;\r |
| 213 | CycloneRun(&PicoCpu);\r |
| 214 | SekCycleCnt+=cyc_do-PicoCpu.cycles;\r |
| 215 | #elif defined(EMU_A68K)\r |
| 216 | m68k_ICount=cyc_do;\r |
| 217 | M68000_RUN();\r |
| 218 | SekCycleCnt+=cyc_do-m68k_ICount;\r |
| 219 | #elif defined(EMU_M68K)\r |
| 220 | SekCycleCnt+=m68k_execute(cyc_do);\r |
| 221 | #endif\r |
| 222 | }\r |
| 223 | \r |
| 224 | static __inline void SekStep(void)\r |
| 225 | {\r |
| 226 | // this is required for timing sensitive stuff to work\r |
| 227 | int realaim=SekCycleAim; SekCycleAim=SekCycleCnt+1;\r |
| 228 | #if defined(EMU_C68K) && defined(EMU_M68K)\r |
| 229 | // this means we do run-compare Cyclone vs Musashi\r |
| 230 | SekCycleCnt+=CM_compareRun(1);\r |
| 231 | #elif defined(EMU_C68K)\r |
| 232 | PicoCpu.cycles=1;\r |
| 233 | CycloneRun(&PicoCpu);\r |
| 234 | SekCycleCnt+=1-PicoCpu.cycles;\r |
| 235 | #elif defined(EMU_A68K)\r |
| 236 | m68k_ICount=1;\r |
| 237 | M68000_RUN();\r |
| 238 | SekCycleCnt+=1-m68k_ICount;\r |
| 239 | #elif defined(EMU_M68K)\r |
| 240 | SekCycleCnt+=m68k_execute(1);\r |
| 241 | #endif\r |
| 242 | SekCycleAim=realaim;\r |
| 243 | }\r |
| 244 | \r |
| 245 | static int CheckIdle(void)\r |
| 246 | {\r |
| 247 | #if 1\r |
| 248 | unsigned char state[0x88];\r |
| 249 | \r |
| 250 | memset(state,0,sizeof(state));\r |
| 251 | \r |
| 252 | // See if the state is the same after 2 steps:\r |
| 253 | SekState(state); SekStep(); SekStep(); SekState(state+0x44);\r |
| 254 | if (memcmp(state,state+0x44,0x44)==0) return 1;\r |
| 255 | #else\r |
| 256 | unsigned char state[0x44];\r |
| 257 | static unsigned char oldstate[0x44];\r |
| 258 | \r |
| 259 | SekState(state);\r |
| 260 | if(memcmp(state,oldstate,0x40)==0) return 1;\r |
| 261 | memcpy(oldstate, state, 0x40);\r |
| 262 | #endif\r |
| 263 | \r |
| 264 | return 0;\r |
| 265 | }\r |
| 266 | \r |
| 267 | void lprintf_al(const char *fmt, ...);\r |
| 268 | \r |
| 269 | // to be called on 224 or line_sample scanlines only\r |
| 270 | static __inline void getSamples(int y)\r |
| 271 | {\r |
| 272 | static int curr_pos = 0;\r |
| 273 | \r |
| 274 | if(y == 224) {\r |
| 275 | if(emustatus & 2)\r |
| 276 | curr_pos += sound_render(curr_pos, PsndLen-PsndLen/2);\r |
| 277 | else curr_pos = sound_render(0, PsndLen);\r |
| 278 | if (emustatus&1) emustatus|=2; else emustatus&=~2;\r |
| 279 | if (PicoWriteSound) PicoWriteSound(curr_pos);\r |
| 280 | // clear sound buffer\r |
| 281 | sound_clear();\r |
| 282 | }\r |
| 283 | else if(emustatus & 3) {\r |
| 284 | emustatus|= 2;\r |
| 285 | emustatus&=~1;\r |
| 286 | curr_pos = sound_render(0, PsndLen/2);\r |
| 287 | }\r |
| 288 | }\r |
| 289 | \r |
| 290 | \r |
| 291 | #if 1*0\r |
| 292 | int vint_delay = 205/*68*/, as_delay = 18/*148*/;\r |
| 293 | \r |
| 294 | // Accurate but slower frame which does hints\r |
| 295 | static int PicoFrameHints(void)\r |
| 296 | {\r |
| 297 | struct PicoVideo *pv=&Pico.video;\r |
| 298 | int total_z80=0,lines,y,lines_vis = 224,z80CycleAim = 0,line_sample;\r |
| 299 | const int cycles_68k=488,cycles_z80=228; // both PAL and NTSC compile to same values\r |
| 300 | int skip=PicoSkipFrame || (PicoOpt&0x10);\r |
| 301 | int hint; // Hint counter\r |
| 302 | \r |
| 303 | if(Pico.m.pal) { //\r |
| 304 | //cycles_68k = (int) ((double) OSC_PAL / 7 / 50 / 312 + 0.4); // should compile to a constant (488)\r |
| 305 | //cycles_z80 = (int) ((double) OSC_PAL / 15 / 50 / 312 + 0.4); // 228\r |
| 306 | lines = 312; // Steve Snake says there are 313 lines, but this seems to also work well\r |
| 307 | line_sample = 68;\r |
| 308 | if(pv->reg[1]&8) lines_vis = 240;\r |
| 309 | } else {\r |
| 310 | //cycles_68k = (int) ((double) OSC_NTSC / 7 / 60 / 262 + 0.4); // 488\r |
| 311 | //cycles_z80 = (int) ((double) OSC_NTSC / 15 / 60 / 262 + 0.4); // 228\r |
| 312 | lines = 262;\r |
| 313 | line_sample = 93;\r |
| 314 | }\r |
| 315 | \r |
| 316 | SekCyclesReset();\r |
| 317 | //z80ExtraCycles = 0;\r |
| 318 | \r |
| 319 | if(PicoOpt&4)\r |
| 320 | z80CycleAim = 0;\r |
| 321 | // z80_resetCycles();\r |
| 322 | \r |
| 323 | pv->status&=~0x88; // clear V-Int, come out of vblank\r |
| 324 | \r |
| 325 | hint=pv->reg[10]; // Load H-Int counter\r |
| 326 | //dprintf("-hint: %i", hint);\r |
| 327 | \r |
| 328 | //SekRun(as_delay);\r |
| 329 | SekRun(148);\r |
| 330 | \r |
| 331 | for (y=0;y<lines;y++)\r |
| 332 | {\r |
| 333 | Pico.m.scanline=(short)y;\r |
| 334 | \r |
| 335 | // VDP FIFO\r |
| 336 | pv->lwrite_cnt -= 12;\r |
| 337 | if (pv->lwrite_cnt < 0) pv->lwrite_cnt=0;\r |
| 338 | if (pv->lwrite_cnt == 0)\r |
| 339 | Pico.video.status|=0x200;\r |
| 340 | \r |
| 341 | // pad delay (for 6 button pads)\r |
| 342 | if(PicoOpt&0x20) {\r |
| 343 | if(Pico.m.padDelay[0]++ > 25) Pico.m.padTHPhase[0]=0;\r |
| 344 | if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0;\r |
| 345 | }\r |
| 346 | \r |
| 347 | // H-Interrupts:\r |
| 348 | if(y <= lines_vis && --hint < 0) // y <= lines_vis: Comix Zone, Golden Axe\r |
| 349 | {\r |
| 350 | //dprintf("rhint:old @ %06x", SekPc);\r |
| 351 | hint=pv->reg[10]; // Reload H-Int counter\r |
| 352 | pv->pending_ints|=0x10;\r |
| 353 | if (pv->reg[0]&0x10) {\r |
| 354 | elprintf(EL_INTS, "hint: @ %06x [%i]", SekPc, SekCycleCnt);\r |
| 355 | SekInterrupt(4);\r |
| 356 | }\r |
| 357 | //dprintf("hint_routine: %x", (*(unsigned short*)(Pico.ram+0x0B84)<<16)|*(unsigned short*)(Pico.ram+0x0B86));\r |
| 358 | }\r |
| 359 | \r |
| 360 | // V-Interrupt:\r |
| 361 | if (y == lines_vis)\r |
| 362 | {\r |
| 363 | pv->status|=0x08; // go into vblank\r |
| 364 | //pv->status|=0x80; // V-Int happened\r |
| 365 | //if(!Pico.m.dma_bytes||(Pico.video.reg[0x17]&0x80)) {\r |
| 366 | // there must be a gap between H and V ints, also after vblank bit set (Mazin Saga, Bram Stoker's Dracula)\r |
| 367 | SekRun(68); SekCycleAim-=68; // 128; ?\r |
| 368 | SekCycleAim-=148;\r |
| 369 | // SekRun(vint_delay); SekCycleAim-=vint_delay; // 128; ?\r |
| 370 | // SekCycleAim-=as_delay;\r |
| 371 | //}\r |
| 372 | pv->pending_ints|=0x20;\r |
| 373 | if(pv->reg[1]&0x20) {\r |
| 374 | elprintf(EL_INTS, "vint: @ %06x [%i]", SekPc, SekCycleCnt);\r |
| 375 | SekInterrupt(6);\r |
| 376 | }\r |
| 377 | if(Pico.m.z80Run && (PicoOpt&4)) // ?\r |
| 378 | z80_int();\r |
| 379 | //dprintf("zint: [%i|%i] zPC=%04x", Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0));\r |
| 380 | }\r |
| 381 | \r |
| 382 | // decide if we draw this line\r |
| 383 | #if CAN_HANDLE_240_LINES\r |
| 384 | if(!skip && ((!(pv->reg[1]&8) && y<224) || ((pv->reg[1]&8) && y<240)) )\r |
| 385 | #else\r |
| 386 | if(!skip && y<224)\r |
| 387 | #endif\r |
| 388 | PicoLine(y);\r |
| 389 | \r |
| 390 | if(PicoOpt&1)\r |
| 391 | sound_timers_and_dac(y);\r |
| 392 | \r |
| 393 | // get samples from sound chips\r |
| 394 | if(y == 32 && PsndOut)\r |
| 395 | emustatus &= ~1;\r |
| 396 | else if((y == 224 || y == line_sample) && PsndOut)\r |
| 397 | getSamples(y);\r |
| 398 | \r |
| 399 | // Run scanline:\r |
| 400 | if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());\r |
| 401 | SekRun(cycles_68k);\r |
| 402 | if ((PicoOpt&4) && Pico.m.z80Run) {\r |
| 403 | if (Pico.m.z80Run & 2) z80CycleAim+=cycles_z80;\r |
| 404 | else {\r |
| 405 | int cnt = SekCyclesDone() - z80startCycle;\r |
| 406 | cnt = (cnt>>1)-(cnt>>5);\r |
| 407 | //if (cnt > cycles_z80) printf("FIXME: z80 cycles: %i\n", cnt);\r |
| 408 | if (cnt > cycles_z80) cnt = cycles_z80;\r |
| 409 | Pico.m.z80Run |= 2;\r |
| 410 | z80CycleAim+=cnt;\r |
| 411 | }\r |
| 412 | total_z80+=z80_run(z80CycleAim-total_z80);\r |
| 413 | }\r |
| 414 | }\r |
| 415 | \r |
| 416 | // draw a frame just after vblank in alternative render mode\r |
| 417 | if(!PicoSkipFrame && (PicoOpt&0x10))\r |
| 418 | PicoFrameFull();\r |
| 419 | \r |
| 420 | return 0;\r |
| 421 | }\r |
| 422 | #else\r |
| 423 | #include "PicoFrameHints.c"\r |
| 424 | #endif\r |
| 425 | \r |
| 426 | // helper z80 runner\r |
| 427 | static void PicoRunZ80Simple(int line_from, int line_to)\r |
| 428 | {\r |
| 429 | int line_from_r=line_from, line_to_r=line_to, line = line_from;\r |
| 430 | int line_sample = Pico.m.pal ? 68 : 93;\r |
| 431 | \r |
| 432 | if(!(PicoOpt&4) || Pico.m.z80Run == 0) { line_from_r = line_to_r; line_to_r = 0; }\r |
| 433 | \r |
| 434 | if(PicoOpt&1) {\r |
| 435 | // we have ym2612 enabled, so we have to run Z80 in lines, so we could update DAC and timers\r |
| 436 | for(; line < line_to; line++) {\r |
| 437 | sound_timers_and_dac(line);\r |
| 438 | if((line == 224 || line == line_sample) && PsndOut) getSamples(line);\r |
| 439 | if(line == 32 && PsndOut) emustatus &= ~1;\r |
| 440 | if(line >= line_from_r && line < line_to_r)\r |
| 441 | z80_run(228);\r |
| 442 | }\r |
| 443 | } else if(line_to_r-line_from_r > 0) {\r |
| 444 | z80_run(228*(line_to_r-line_from_r));\r |
| 445 | // samples will be taken by caller\r |
| 446 | }\r |
| 447 | }\r |
| 448 | \r |
| 449 | // Simple frame without H-Ints\r |
| 450 | static int PicoFrameSimple(void)\r |
| 451 | {\r |
| 452 | struct PicoVideo *pv=&Pico.video;\r |
| 453 | int y=0,line=0,lines=0,lines_step=0,sects;\r |
| 454 | int cycles_68k_vblock,cycles_68k_block;\r |
| 455 | \r |
| 456 | // split to 16 run calls for active scan, for vblank split to 2 (ntsc), 3 (pal 240), 4 (pal 224)\r |
| 457 | if (Pico.m.pal && (pv->reg[1]&8)) { // 240 lines\r |
| 458 | if(pv->reg[1]&8) { // 240 lines\r |
| 459 | cycles_68k_block = 7329; // (488*240+148)/16.0, -4\r |
| 460 | cycles_68k_vblock = 11640; // (72*488-148-68)/3.0, 0\r |
| 461 | lines_step = 15;\r |
| 462 | } else {\r |
| 463 | cycles_68k_block = 6841; // (488*224+148)/16.0, -4\r |
| 464 | cycles_68k_vblock = 10682; // (88*488-148-68)/4.0, 0\r |
| 465 | lines_step = 14;\r |
| 466 | }\r |
| 467 | } else {\r |
| 468 | // M68k cycles/frame: 127840.71\r |
| 469 | cycles_68k_block = 6841; // (488*224+148)/16.0, -4\r |
| 470 | cycles_68k_vblock = 9164; // (38*488-148-68)/2.0, 0\r |
| 471 | lines_step = 14;\r |
| 472 | }\r |
| 473 | \r |
| 474 | // we don't emulate DMA timing in this mode\r |
| 475 | if (Pico.m.dma_xfers) {\r |
| 476 | Pico.m.dma_xfers=0;\r |
| 477 | Pico.video.status&=~2;\r |
| 478 | }\r |
| 479 | \r |
| 480 | // VDP FIFO too\r |
| 481 | pv->lwrite_cnt = 0;\r |
| 482 | Pico.video.status|=0x200;\r |
| 483 | \r |
| 484 | Pico.m.scanline=-1;\r |
| 485 | \r |
| 486 | SekCyclesReset();\r |
| 487 | \r |
| 488 | // 6 button pad: let's just say it timed out now\r |
| 489 | Pico.m.padTHPhase[0]=Pico.m.padTHPhase[1]=0;\r |
| 490 | \r |
| 491 | // ---- Active Scan ----\r |
| 492 | pv->status&=~0x88; // clear V-Int, come out of vblank\r |
| 493 | \r |
| 494 | // Run in sections:\r |
| 495 | for(sects=16; sects; sects--)\r |
| 496 | {\r |
| 497 | if (CheckIdle()) break;\r |
| 498 | \r |
| 499 | lines += lines_step;\r |
| 500 | SekRunM68k(cycles_68k_block);\r |
| 501 | \r |
| 502 | PicoRunZ80Simple(line, lines);\r |
| 503 | line=lines;\r |
| 504 | }\r |
| 505 | \r |
| 506 | // run Z80 for remaining sections\r |
| 507 | if(sects) {\r |
| 508 | int c = sects*cycles_68k_block;\r |
| 509 | \r |
| 510 | lines += sects*lines_step;\r |
| 511 | PicoRunZ80Simple(line, lines);\r |
| 512 | // this is for approriate line counter, etc\r |
| 513 | SekCycleCnt += c;\r |
| 514 | SekCycleAim += c;\r |
| 515 | }\r |
| 516 | \r |
| 517 | // here we render sound if ym2612 is disabled\r |
| 518 | if (!(PicoOpt&1) && PsndOut) {\r |
| 519 | int len = sound_render(0, PsndLen);\r |
| 520 | if (PicoWriteSound) PicoWriteSound(len);\r |
| 521 | // clear sound buffer\r |
| 522 | sound_clear();\r |
| 523 | }\r |
| 524 | \r |
| 525 | // render screen\r |
| 526 | if (!PicoSkipFrame)\r |
| 527 | {\r |
| 528 | if (!(PicoOpt&0x10))\r |
| 529 | // Draw the screen\r |
| 530 | #if CAN_HANDLE_240_LINES\r |
| 531 | if (pv->reg[1]&8) {\r |
| 532 | for (y=0;y<240;y++) PicoLine(y);\r |
| 533 | } else {\r |
| 534 | for (y=0;y<224;y++) PicoLine(y);\r |
| 535 | }\r |
| 536 | #else\r |
| 537 | for (y=0;y<224;y++) PicoLine(y);\r |
| 538 | #endif\r |
| 539 | else PicoFrameFull();\r |
| 540 | }\r |
| 541 | \r |
| 542 | // a gap between flags set and vint\r |
| 543 | pv->pending_ints|=0x20;\r |
| 544 | pv->status|=8; // go into vblank\r |
| 545 | SekRunM68k(68+4);\r |
| 546 | \r |
| 547 | // ---- V-Blanking period ----\r |
| 548 | // fix line counts\r |
| 549 | if(Pico.m.pal) {\r |
| 550 | if(pv->reg[1]&8) { // 240 lines\r |
| 551 | lines = line = 240;\r |
| 552 | sects = 3;\r |
| 553 | lines_step = 24;\r |
| 554 | } else {\r |
| 555 | lines = line = 224;\r |
| 556 | sects = 4;\r |
| 557 | lines_step = 22;\r |
| 558 | }\r |
| 559 | } else {\r |
| 560 | lines = line = 224;\r |
| 561 | sects = 2;\r |
| 562 | lines_step = 19;\r |
| 563 | }\r |
| 564 | \r |
| 565 | if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ\r |
| 566 | if (Pico.m.z80Run && (PicoOpt&4))\r |
| 567 | z80_int();\r |
| 568 | \r |
| 569 | while (sects) {\r |
| 570 | lines += lines_step;\r |
| 571 | \r |
| 572 | SekRunM68k(cycles_68k_vblock);\r |
| 573 | \r |
| 574 | PicoRunZ80Simple(line, lines);\r |
| 575 | line=lines;\r |
| 576 | \r |
| 577 | sects--;\r |
| 578 | if (sects && CheckIdle()) break;\r |
| 579 | }\r |
| 580 | \r |
| 581 | // run Z80 for remaining sections\r |
| 582 | if (sects) {\r |
| 583 | lines += sects*lines_step;\r |
| 584 | PicoRunZ80Simple(line, lines);\r |
| 585 | }\r |
| 586 | \r |
| 587 | return 0;\r |
| 588 | }\r |
| 589 | \r |
| 590 | int PicoFrame(void)\r |
| 591 | {\r |
| 592 | int acc;\r |
| 593 | \r |
| 594 | Pico.m.frame_count++;\r |
| 595 | \r |
| 596 | if (PicoMCD & 1) {\r |
| 597 | PicoFrameMCD();\r |
| 598 | return 0;\r |
| 599 | }\r |
| 600 | \r |
| 601 | // be accurate if we are asked for this\r |
| 602 | if(PicoOpt&0x40) acc=1;\r |
| 603 | // don't be accurate in alternative render mode, as hint effects will not be rendered anyway\r |
| 604 | else if(PicoOpt&0x10) acc = 0;\r |
| 605 | else acc=Pico.video.reg[0]&0x10; // be accurate if hints are used\r |
| 606 | \r |
| 607 | //if(Pico.video.reg[12]&0x2) Pico.video.status ^= 0x10; // change odd bit in interlace mode\r |
| 608 | \r |
| 609 | if(!(PicoOpt&0x10))\r |
| 610 | PicoFrameStart();\r |
| 611 | \r |
| 612 | if(acc)\r |
| 613 | PicoFrameHints();\r |
| 614 | else PicoFrameSimple();\r |
| 615 | \r |
| 616 | return 0;\r |
| 617 | }\r |
| 618 | \r |
| 619 | void PicoFrameDrawOnly(void)\r |
| 620 | {\r |
| 621 | int y;\r |
| 622 | PicoFrameStart();\r |
| 623 | for (y=0;y<224;y++) PicoLine(y);\r |
| 624 | }\r |
| 625 | \r |
| 626 | // callback to output message from emu\r |
| 627 | void (*PicoMessage)(const char *msg)=NULL;\r |
| 628 | \r |
| 629 | #if defined(__DEBUG_PRINT) || defined(__GP2X__) || defined(__GIZ__)\r |
| 630 | // tmp debug: dump some stuff\r |
| 631 | #define bit(r, x) ((r>>x)&1)\r |
| 632 | void z80_debug(char *dstr);\r |
| 633 | char *debugString(void)\r |
| 634 | {\r |
| 635 | #if 1\r |
| 636 | static char dstr[1024];\r |
| 637 | struct PicoVideo *pv=&Pico.video;\r |
| 638 | unsigned char *reg=pv->reg, r;\r |
| 639 | char *dstrp;\r |
| 640 | \r |
| 641 | dstrp = dstr;\r |
| 642 | sprintf(dstrp, "mode set 1: %02x\n", (r=reg[0])); dstrp+=strlen(dstrp);\r |
| 643 | sprintf(dstrp, "display_disable: %i, M3: %i, palette: %i, ?, hints: %i\n", bit(r,0), bit(r,1), bit(r,2), bit(r,4));\r |
| 644 | dstrp+=strlen(dstrp);\r |
| 645 | sprintf(dstrp, "mode set 2: %02x\n", (r=reg[1])); dstrp+=strlen(dstrp);\r |
| 646 | sprintf(dstrp, "SMS/gen: %i, pal: %i, dma: %i, vints: %i, disp: %i, TMS: %i\n", bit(r,2), bit(r,3), bit(r,4),\r |
| 647 | bit(r,5), bit(r,6), bit(r,7)); dstrp+=strlen(dstrp);\r |
| 648 | sprintf(dstrp, "mode set 3: %02x\n", (r=reg[0xB])); dstrp+=strlen(dstrp);\r |
| 649 | sprintf(dstrp, "LSCR: %i, HSCR: %i, 2cell vscroll: %i, IE2: %i\n", bit(r,0), bit(r,1), bit(r,2), bit(r,3)); dstrp+=strlen(dstrp);\r |
| 650 | sprintf(dstrp, "mode set 4: %02x\n", (r=reg[0xC])); dstrp+=strlen(dstrp);\r |
| 651 | sprintf(dstrp, "interlace: %i%i, cells: %i, shadow: %i\n", bit(r,2), bit(r,1), (r&0x80) ? 40 : 32, bit(r,3));\r |
| 652 | dstrp+=strlen(dstrp);\r |
| 653 | sprintf(dstrp, "scroll size: w: %i, h: %i SRAM: %i; eeprom: %i (%i)\n", reg[0x10]&3, (reg[0x10]&0x30)>>4,\r |
| 654 | bit(Pico.m.sram_reg, 4), bit(Pico.m.sram_reg, 2), SRam.eeprom_type); dstrp+=strlen(dstrp);\r |
| 655 | sprintf(dstrp, "sram range: %06x-%06x, reg: %02x\n", SRam.start, SRam.end, Pico.m.sram_reg); dstrp+=strlen(dstrp);\r |
| 656 | sprintf(dstrp, "pend int: v:%i, h:%i, vdp status: %04x\n", bit(pv->pending_ints,5), bit(pv->pending_ints,4), pv->status);\r |
| 657 | dstrp+=strlen(dstrp);\r |
| 658 | #ifdef EMU_C68K\r |
| 659 | sprintf(dstrp, "M68k: PC: %06x, st_flg: %x, cycles: %u\n", SekPc, PicoCpu.state_flags, SekCyclesDoneT());\r |
| 660 | dstrp+=strlen(dstrp);\r |
| 661 | sprintf(dstrp, "d0=%08x, a0=%08x, osp=%08x, irql=%i\n", PicoCpu.d[0], PicoCpu.a[0], PicoCpu.osp, PicoCpu.irq); dstrp+=strlen(dstrp);\r |
| 662 | sprintf(dstrp, "d1=%08x, a1=%08x, sr=%04x\n", PicoCpu.d[1], PicoCpu.a[1], CycloneGetSr(&PicoCpu)); dstrp+=strlen(dstrp);\r |
| 663 | for(r=2; r < 8; r++) {\r |
| 664 | sprintf(dstrp, "d%i=%08x, a%i=%08x\n", r, PicoCpu.d[r], r, PicoCpu.a[r]); dstrp+=strlen(dstrp);\r |
| 665 | }\r |
| 666 | #endif\r |
| 667 | sprintf(dstrp, "z80Run: %i, pal: %i, frame#: %i\n", Pico.m.z80Run, Pico.m.pal, Pico.m.frame_count); dstrp+=strlen(dstrp);\r |
| 668 | z80_debug(dstrp); dstrp+=strlen(dstrp);\r |
| 669 | if (strlen(dstr) > sizeof(dstr))\r |
| 670 | printf("warning: debug buffer overflow (%i/%i)\n", strlen(dstr), sizeof(dstr));\r |
| 671 | \r |
| 672 | #else\r |
| 673 | struct PicoVideo *pvid=&Pico.video;\r |
| 674 | int table=0;\r |
| 675 | int i,u,n,link=0;\r |
| 676 | static char dstr[1024*8];\r |
| 677 | dstr[0] = 0;\r |
| 678 | \r |
| 679 | table=pvid->reg[5]&0x7f;\r |
| 680 | if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r |
| 681 | table<<=8; // Get sprite table address/2\r |
| 682 | \r |
| 683 | for (i=u=n=0; u < 80 && n < 20; u++)\r |
| 684 | {\r |
| 685 | unsigned int *sprite;\r |
| 686 | int code, code2, sx, sy, height;\r |
| 687 | \r |
| 688 | sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r |
| 689 | \r |
| 690 | // get sprite info\r |
| 691 | code = sprite[0];\r |
| 692 | \r |
| 693 | // check if it is on this line\r |
| 694 | sy = (code&0x1ff);//-0x80;\r |
| 695 | height = ((code>>24)&3)+1;\r |
| 696 | \r |
| 697 | // masking sprite?\r |
| 698 | code2 = sprite[1];\r |
| 699 | sx = (code2>>16)&0x1ff;\r |
| 700 | \r |
| 701 | printf("#%02i x: %03i y: %03i %ix%i\n", u, sx, sy, ((code>>26)&3)+1, height);\r |
| 702 | \r |
| 703 | link=(code>>16)&0x7f;\r |
| 704 | if(!link) break; // End of sprites\r |
| 705 | }\r |
| 706 | #endif\r |
| 707 | \r |
| 708 | #if 0\r |
| 709 | {\r |
| 710 | FILE *f = fopen("zram", "wb");\r |
| 711 | fwrite(Pico.zram, 1, 0x2000, f);\r |
| 712 | fclose(f);\r |
| 713 | }\r |
| 714 | #endif\r |
| 715 | \r |
| 716 | return dstr;\r |
| 717 | }\r |
| 718 | #endif\r |