-// This is part of Pico Library\r
+// PicoDrive\r
\r
// (c) Copyright 2004 Dave, All rights reserved.\r
-// (c) Copyright 2006 notaz, All rights reserved.\r
+// (c) Copyright 2006-2008 notaz, All rights reserved.\r
// Free for non-commercial use.\r
\r
// For commercial use, separate licencing terms must be obtained.\r
\r
int PicoVer=0x0133;\r
struct Pico Pico;\r
-int PicoOpt=0; // disable everything by default\r
-int PicoSkipFrame=0; // skip rendering frame?\r
+int PicoOpt = 0;\r
+int PicoSkipFrame = 0; // skip rendering frame?\r
+int emustatus = 0; // rapid_ym2612, multi_ym_updates\r
+int PicoPad[2]; // Joypads, format is SACB RLDU\r
+int PicoAHW = 0; // active addon hardware: scd_active, 32x_active, svp_active, pico_active\r
int PicoRegionOverride = 0; // override the region detection 0: Auto, 1: Japan NTSC, 2: Japan PAL, 4: US, 8: Europe\r
int PicoAutoRgnOrder = 0;\r
-int emustatus = 0; // rapid_ym2612, multi_ym_updates\r
+struct PicoSRAM SRam = {0,};\r
+\r
void (*PicoWriteSound)(int len) = NULL; // called at the best time to send sound buffer (PsndOut) to hardware\r
void (*PicoResetHook)(void) = NULL;\r
void (*PicoLineHook)(int count) = NULL;\r
\r
-struct PicoSRAM SRam = {0,};\r
-int z80startCycle, z80stopCycle; // in 68k cycles\r
-int PicoPad[2]; // Joypads, format is SACB RLDU\r
-int PicoMCD = 0; // mega CD status: scd_started\r
-\r
// to be called once on emu init\r
-int PicoInit(void)\r
+void PicoInit(void)\r
{\r
// Blank space for state:\r
memset(&Pico,0,sizeof(Pico));\r
PicoSVPInit();\r
\r
SRam.data=0;\r
-\r
- return 0;\r
}\r
\r
// to be called once on emu exit\r
void PicoExit(void)\r
{\r
- if (PicoMCD&1)\r
+ if (PicoAHW & PAHW_MCD)\r
PicoExitMCD();\r
z80_exit();\r
\r
- if(SRam.data) free(SRam.data); SRam.data=0;\r
+ if (SRam.data) free(SRam.data); SRam.data=0;\r
}\r
\r
-int PicoReset(int hard)\r
+void PicoPower(void)\r
{\r
- unsigned int region=0;\r
- int support=0,hw=0,i=0;\r
- unsigned char pal=0;\r
unsigned char sram_reg=Pico.m.sram_reg; // must be preserved\r
\r
- if (Pico.romsize<=0) return 1;\r
-\r
- /* must call now, so that banking is reset, and correct vectors get fetched */\r
- if (PicoResetHook) PicoResetHook();\r
+ Pico.m.frame_count = 0;\r
\r
- PicoMemReset();\r
- SekReset();\r
- // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).\r
- SekSetRealTAS(PicoMCD & 1);\r
- SekCycleCntT=0;\r
- z80_reset();\r
+ // clear all memory of the emulated machine\r
+ memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);\r
\r
- // reset VDP state, VRAM and PicoMisc\r
- //memset(&Pico.video,0,sizeof(Pico.video));\r
- //memset(&Pico.vram,0,sizeof(Pico.vram));\r
- memset(Pico.ioports,0,sizeof(Pico.ioports)); // needed for MCD to reset properly\r
+ memset(&Pico.video,0,sizeof(Pico.video));\r
memset(&Pico.m,0,sizeof(Pico.m));\r
- Pico.video.pending_ints=0;\r
- emustatus = 0;\r
\r
- if (hard) {\r
- // clear all memory of the emulated machine\r
- memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);\r
- }\r
+ Pico.video.pending_ints=0;\r
+ z80_reset();\r
\r
// default VDP register values (based on Fusion)\r
Pico.video.reg[0] = Pico.video.reg[1] = 0x04;\r
Pico.video.reg[0xc] = 0x81;\r
Pico.video.reg[0xf] = 0x02;\r
- Pico.m.dirtyPal = 1;\r
\r
- if(PicoRegionOverride)\r
+ if (PicoAHW & PAHW_MCD)\r
+ PicoPowerMCD();\r
+\r
+ Pico.m.sram_reg=sram_reg;\r
+ PicoReset();\r
+}\r
+\r
+PICO_INTERNAL void PicoDetectRegion(void)\r
+{\r
+ int support=0, hw=0, i;\r
+ unsigned char pal=0;\r
+\r
+ if (PicoRegionOverride)\r
{\r
support = PicoRegionOverride;\r
}\r
else\r
{\r
// Read cartridge region data:\r
- region=PicoRead32(0x1f0);\r
+ int region=PicoRead32(0x1f0);\r
\r
for (i=0;i<4;i++)\r
{\r
\r
Pico.m.hardware=(unsigned char)(hw|0x20); // No disk attached\r
Pico.m.pal=pal;\r
- Pico.video.status = 0x3408 | pal; // always set bits | vblank | pal\r
+}\r
+\r
+int PicoReset(void)\r
+{\r
+ unsigned char sram_reg=Pico.m.sram_reg; // must be preserved\r
+\r
+ if (Pico.romsize<=0) return 1;\r
+\r
+ /* must call now, so that banking is reset, and correct vectors get fetched */\r
+ if (PicoResetHook) PicoResetHook();\r
+\r
+ PicoMemReset();\r
+ SekReset();\r
+ // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).\r
+ SekSetRealTAS(PicoAHW & PAHW_MCD);\r
+ SekCycleCntT=0;\r
+\r
+ if (PicoAHW & PAHW_MCD)\r
+ // needed for MCD to reset properly, probably some bug hides behind this..\r
+ memset(Pico.ioports,0,sizeof(Pico.ioports));\r
+ emustatus = 0;\r
+\r
+ Pico.m.dirtyPal = 1;\r
+\r
+ Pico.m.z80_bank68k = 0;\r
+ memset(Pico.zram, 0, sizeof(Pico.zram)); // ??\r
+\r
+ PicoDetectRegion();\r
+ Pico.video.status = 0x3428 | Pico.m.pal; // 'always set' bits | vblank | collision | pal\r
\r
PsndReset(); // pal must be known here\r
\r
- if (PicoMCD & 1) {\r
- PicoResetMCD(hard);\r
+ // create an empty "dma" to cause 68k exec start at random frame location\r
+ if (Pico.m.dma_xfers == 0 && !(PicoOpt&POPT_DIS_VDP_FIFO))\r
+ Pico.m.dma_xfers = rand() & 0x1fff;\r
+\r
+ if (PicoAHW & PAHW_MCD) {\r
+ PicoResetMCD();\r
return 0;\r
}\r
+ else {\r
+ // reinit, so that checksum checks pass\r
+ SekFinishIdleDet();\r
+ if (!(PicoOpt & POPT_DIS_IDLE_DET))\r
+ SekInitIdleDet();\r
+ }\r
\r
// reset sram state; enable sram access by default if it doesn't overlap with ROM\r
Pico.m.sram_reg=sram_reg&0x14;\r
// same for Outrunners (92-121, when active is set to 24)\r
// 96 is VR hack\r
static const int dma_timings[] = {\r
-96, 167, 166, 83, // vblank: 32cell: dma2vram dma2[vs|c]ram vram_fill vram_copy\r
-102, 205, 204, 102, // vblank: 40cell:\r
-16, 16, 15, 8, // active: 32cell:\r
-24, 18, 17, 9 // ...\r
+ 96, 167, 166, 83, // vblank: 32cell: dma2vram dma2[vs|c]ram vram_fill vram_copy\r
+ 102, 205, 204, 102, // vblank: 40cell:\r
+ 16, 16, 15, 8, // active: 32cell:\r
+ 24, 18, 17, 9 // ...\r
};\r
\r
static const int dma_bsycles[] = {\r
-(488<<8)/96, (488<<8)/167, (488<<8)/166, (488<<8)/83,\r
-(488<<8)/102, (488<<8)/205, (488<<8)/204, (488<<8)/102,\r
-(488<<8)/16, (488<<8)/16, (488<<8)/15, (488<<8)/8,\r
-(488<<8)/24, (488<<8)/18, (488<<8)/17, (488<<8)/9\r
+ (488<<8)/96, (488<<8)/167, (488<<8)/166, (488<<8)/83,\r
+ (488<<8)/102, (488<<8)/205, (488<<8)/204, (488<<8)/102,\r
+ (488<<8)/16, (488<<8)/16, (488<<8)/15, (488<<8)/8,\r
+ (488<<8)/24, (488<<8)/18, (488<<8)/17, (488<<8)/9\r
};\r
\r
PICO_INTERNAL int CheckDMA(void)\r
if(Pico.video.reg[12] & 1) dma_op |= 4; // 40 cell mode?\r
if(!(Pico.video.status&8)&&(Pico.video.reg[1]&0x40)) dma_op|=8; // active display?\r
xfers_can = dma_timings[dma_op];\r
- if(xfers <= xfers_can) {\r
+ if(xfers <= xfers_can)\r
+ {\r
if(dma_op&2) Pico.video.status&=~2; // dma no longer busy\r
else {\r
burn = xfers * dma_bsycles[dma_op] >> 8; // have to be approximate because can't afford division..\r
{\r
int cyc_do;\r
SekCycleAim+=cyc;\r
- if((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return;\r
+ if ((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return;\r
#if defined(EMU_CORE_DEBUG)\r
// this means we do run-compare\r
SekCycleCnt+=CM_compareRun(cyc_do, 0);\r
#endif\r
}\r
\r
-static __inline void SekStep(void)\r
-{\r
- // this is required for timing sensitive stuff to work\r
- int realaim=SekCycleAim; SekCycleAim=SekCycleCnt+1;\r
-#if defined(EMU_CORE_DEBUG)\r
- SekCycleCnt+=CM_compareRun(1, 0);\r
-#elif defined(EMU_C68K)\r
- PicoCpuCM68k.cycles=1;\r
- CycloneRun(&PicoCpuCM68k);\r
- SekCycleCnt+=1-PicoCpuCM68k.cycles;\r
-#elif defined(EMU_M68K)\r
- SekCycleCnt+=m68k_execute(1);\r
-#elif defined(EMU_F68K)\r
- SekCycleCnt+=fm68k_emulate(1, 0);\r
-#endif\r
- SekCycleAim=realaim;\r
-}\r
-\r
-static int CheckIdle(void)\r
-{\r
- int i, state[0x24];\r
-\r
- // See if the state is the same after 2 steps:\r
- SekState(state); SekStep(); SekStep(); SekState(state+0x12);\r
- for (i = 0x11; i >= 0; i--)\r
- if (state[i] != state[i+0x12]) return 0;\r
-\r
- return 1;\r
-}\r
-\r
\r
// to be called on 224 or line_sample scanlines only\r
static __inline void getSamples(int y)\r
\r
#include "PicoFrameHints.c"\r
\r
-// helper z80 runner. Runs only if z80 is enabled at this point\r
-// (z80WriteBusReq will handle the rest)\r
-static void PicoRunZ80Simple(int line_from, int line_to)\r
-{\r
- int line_from_r=line_from, line_to_r=line_to, line=0;\r
- int line_sample = Pico.m.pal ? 68 : 93;\r
-\r
- if (!(PicoOpt&4) || Pico.m.z80Run == 0) line_to_r = 0;\r
- else {\r
- extern const unsigned short vcounts[];\r
- if (z80startCycle) {\r
- line = vcounts[z80startCycle>>8];\r
- if (line > line_from)\r
- line_from_r = line;\r
- }\r
- z80startCycle = SekCyclesDone();\r
- }\r
\r
- if (PicoOpt&1) {\r
- // we have ym2612 enabled, so we have to run Z80 in lines, so we could update DAC and timers\r
- for (line = line_from; line < line_to; line++) {\r
- Psnd_timers_and_dac(line);\r
- if ((line == 224 || line == line_sample) && PsndOut) getSamples(line);\r
- if (line == 32 && PsndOut) emustatus &= ~1;\r
- if (line >= line_from_r && line < line_to_r)\r
- z80_run_nr(228);\r
- }\r
- } else if (line_to_r-line_from_r > 0) {\r
- z80_run_nr(228*(line_to_r-line_from_r));\r
- // samples will be taken by caller\r
- }\r
-}\r
+int z80stopCycle;\r
+int z80_cycle_cnt; /* 'done' z80 cycles before z80_run() */\r
+int z80_cycle_aim;\r
+int z80_scanline;\r
+int z80_scanline_cycles; /* cycles done until z80_scanline */\r
\r
-// Simple frame without H-Ints\r
-static int PicoFrameSimple(void)\r
+/* sync z80 to 68k */\r
+PICO_INTERNAL void PicoSyncZ80(int m68k_cycles_done)\r
{\r
- struct PicoVideo *pv=&Pico.video;\r
- int y=0,line=0,lines=0,lines_step=0,sects;\r
- int cycles_68k_vblock,cycles_68k_block;\r
-\r
- // split to 16 run calls for active scan, for vblank split to 2 (ntsc), 3 (pal 240), 4 (pal 224)\r
- if (Pico.m.pal && (pv->reg[1]&8)) {\r
- if(pv->reg[1]&8) { // 240 lines\r
- cycles_68k_block = 7329; // (488*240+148)/16.0, -4\r
- cycles_68k_vblock = 11640; // (72*488-148-68)/3.0, 0\r
- lines_step = 15;\r
- } else {\r
- cycles_68k_block = 6841; // (488*224+148)/16.0, -4\r
- cycles_68k_vblock = 10682; // (88*488-148-68)/4.0, 0\r
- lines_step = 14;\r
- }\r
- } else {\r
- // M68k cycles/frame: 127840.71\r
- cycles_68k_block = 6841; // (488*224+148)/16.0, -4\r
- cycles_68k_vblock = 9164; // (38*488-148-68)/2.0, 0\r
- lines_step = 14;\r
- }\r
-\r
- // a hack for VR, to get it running in fast mode\r
- if (PicoRead16Hook == PicoSVPRead16)\r
- Pico.ram[0xd864^1] = 0x1a;\r
-\r
- // we don't emulate DMA timing in this mode\r
- if (Pico.m.dma_xfers) {\r
- Pico.m.dma_xfers=0;\r
- Pico.video.status&=~2;\r
- }\r
-\r
- // VDP FIFO too\r
- pv->lwrite_cnt = 0;\r
- Pico.video.status|=0x200;\r
-\r
- Pico.m.scanline=-1;\r
- z80startCycle=0;\r
-\r
- SekCyclesReset();\r
-\r
- // 6 button pad: let's just say it timed out now\r
- Pico.m.padTHPhase[0]=Pico.m.padTHPhase[1]=0;\r
-\r
- // ---- Active Scan ----\r
- pv->status&=~0x88; // clear V-Int, come out of vblank\r
-\r
- // Run in sections:\r
- for(sects=16; sects; sects--)\r
- {\r
- if (CheckIdle()) break;\r
+ int cnt;\r
+ z80_cycle_aim = cycles_68k_to_z80(m68k_cycles_done);\r
+ cnt = z80_cycle_aim - z80_cycle_cnt;\r
\r
- lines += lines_step;\r
- SekRunM68k(cycles_68k_block);\r
+ elprintf(EL_BUSREQ, "z80 sync %i (%i|%i -> %i|%i)", cnt, z80_cycle_cnt, z80_cycle_cnt / 228,\r
+ z80_cycle_aim, z80_cycle_aim / 228);\r
\r
- PicoRunZ80Simple(line, lines);\r
- if (PicoLineHook) PicoLineHook(lines_step);\r
- line=lines;\r
- }\r
-\r
- // run Z80 for remaining sections\r
- if(sects) {\r
- int c = sects*cycles_68k_block;\r
+ if (cnt > 0)\r
+ z80_cycle_cnt += z80_run(cnt);\r
+}\r
\r
- // this "run" is for approriate line counter, etc\r
- SekCycleCnt += c;\r
- SekCycleAim += c;\r
\r
- lines += sects*lines_step;\r
- PicoRunZ80Simple(line, lines);\r
- if (PicoLineHook) PicoLineHook(sects*lines_step);\r
- }\r
+int idle_hit_counter = 0;\r
\r
- // another hack for VR (it needs hints to work)\r
- if (PicoRead16Hook == PicoSVPRead16) {\r
- Pico.ram[0xd864^1] = 1;\r
- pv->pending_ints|=0x10;\r
- if (pv->reg[0]&0x10) SekInterrupt(4);\r
- SekRunM68k(160);\r
+void PicoFrame(void)\r
+{\r
+#if 0\r
+ if ((Pico.m.frame_count&0x3f) == 0) {\r
+ elprintf(EL_STATUS, "ihits: %i", idle_hit_counter);\r
+ idle_hit_counter = 0;\r
}\r
-\r
- // render screen\r
- if (!PicoSkipFrame)\r
- {\r
- if (!(PicoOpt&0x10))\r
- {\r
- // Draw the screen\r
-#if CAN_HANDLE_240_LINES\r
- if (pv->reg[1]&8) {\r
- for (y=0;y<240;y++) PicoLine(y);\r
- } else {\r
- for (y=0;y<224;y++) PicoLine(y);\r
- }\r
-#else\r
- for (y=0;y<224;y++) PicoLine(y);\r
-#endif\r
- }\r
- else PicoFrameFull();\r
-#ifdef DRAW_FINISH_FUNC\r
- DRAW_FINISH_FUNC();\r
#endif\r
- }\r
-\r
- // here we render sound if ym2612 is disabled\r
- if (!(PicoOpt&1) && PsndOut) {\r
- int len = PsndRender(0, PsndLen);\r
- if (PicoWriteSound) PicoWriteSound(len);\r
- // clear sound buffer\r
- PsndClear();\r
- }\r
-\r
- // a gap between flags set and vint\r
- pv->pending_ints|=0x20;\r
- pv->status|=8; // go into vblank\r
- SekRunM68k(68+4);\r
-\r
- // ---- V-Blanking period ----\r
- // fix line counts\r
- if(Pico.m.pal) {\r
- if(pv->reg[1]&8) { // 240 lines\r
- lines = line = 240;\r
- sects = 3;\r
- lines_step = 24;\r
- } else {\r
- lines = line = 224;\r
- sects = 4;\r
- lines_step = 22;\r
- }\r
- } else {\r
- lines = line = 224;\r
- sects = 2;\r
- lines_step = 19;\r
- }\r
-\r
- if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ\r
- if (Pico.m.z80Run && (PicoOpt&4))\r
- z80_int();\r
-\r
- while (sects) {\r
- lines += lines_step;\r
-\r
- SekRunM68k(cycles_68k_vblock);\r
-\r
- PicoRunZ80Simple(line, lines);\r
- if (PicoLineHook) PicoLineHook(lines_step);\r
- line=lines;\r
-\r
- sects--;\r
- if (sects && CheckIdle()) break;\r
- }\r
-\r
- // run Z80 for remaining sections\r
- if (sects) {\r
- lines += sects*lines_step;\r
- PicoRunZ80Simple(line, lines);\r
- if (PicoLineHook) PicoLineHook(sects*lines_step);\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int PicoFrame(void)\r
-{\r
- int acc;\r
\r
Pico.m.frame_count++;\r
\r
- if (PicoMCD & 1) {\r
+ if (PicoAHW & PAHW_MCD) {\r
PicoFrameMCD();\r
- return 0;\r
+ return;\r
}\r
\r
- // be accurate if we are asked for this\r
- if(PicoOpt&0x40) acc=1;\r
- // don't be accurate in alternative render mode, as hint effects will not be rendered anyway\r
- else if(PicoOpt&0x10) acc = 0;\r
- else acc=Pico.video.reg[0]&0x10; // be accurate if hints are used\r
-\r
//if(Pico.video.reg[12]&0x2) Pico.video.status ^= 0x10; // change odd bit in interlace mode\r
\r
- if(!(PicoOpt&0x10))\r
+ if (!(PicoOpt&POPT_ALT_RENDERER))\r
PicoFrameStart();\r
\r
- if(acc)\r
- PicoFrameHints();\r
- else PicoFrameSimple();\r
-\r
- return 0;\r
+ PicoFrameHints();\r
}\r
\r
void PicoFrameDrawOnly(void)\r
{\r
- int y;\r
PicoFrameStart();\r
- for (y=0;y<224;y++) PicoLine(y);\r
+ PicoDrawSync(223, 0);\r
}\r
\r
-int PicoGetStat(pstat_t which)\r
+void PicoGetInternal(pint_t which, pint_ret_t *r)\r
{\r
switch (which)\r
{\r
- case PS_PAL: return Pico.m.pal;\r
- case PS_40_CELL: return Pico.video.reg[12]&1;\r
- case PS_240_LINES: return Pico.m.pal && (Pico.video.reg[1]&8);\r
+ case PI_ROM: r->vptr = Pico.rom; break;\r
+ case PI_ISPAL: r->vint = Pico.m.pal; break;\r
+ case PI_IS40_CELL: r->vint = Pico.video.reg[12]&1; break;\r
+ case PI_IS240_LINES: r->vint = Pico.m.pal && (Pico.video.reg[1]&8); break;\r
}\r
- return 0;\r
}\r
\r
// callback to output message from emu\r
void (*PicoMessage)(const char *msg)=NULL;\r
\r
#if 1 // defined(__DEBUG_PRINT)\r
-// tmp debug: dump some stuff\r
#define bit(r, x) ((r>>x)&1)\r
void z80_debug(char *dstr);\r
char *debugString(void)\r
notaz.gp2x.de / picodrive.git / blobdiff