\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
+int z80startCycle, z80stopCycle; // in 68k cycles\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
{\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
+ // clear all memory of the emulated machine\r
+ memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);\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
-\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
+ PicoDetectRegion();\r
+ Pico.video.status = 0x3408 | Pico.m.pal; // 'always set' bits | vblank | 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
\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
+ if (!(PicoOpt&POPT_EN_Z80) || Pico.m.z80Run == 0) line_to_r = 0;\r
else {\r
extern const unsigned short vcounts[];\r
if (z80startCycle) {\r
z80startCycle = SekCyclesDone();\r
}\r
\r
- if (PicoOpt&1) {\r
+ if (PicoOpt&POPT_EN_FM) {\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
}\r
\r
// a hack for VR, to get it running in fast mode\r
- if (PicoRead16Hook == PicoSVPRead16)\r
+ if (PicoAHW & PAHW_SVP)\r
Pico.ram[0xd864^1] = 0x1a;\r
\r
// we don't emulate DMA timing in this mode\r
}\r
\r
// another hack for VR (it needs hints to work)\r
- if (PicoRead16Hook == PicoSVPRead16) {\r
+ if (PicoAHW & PAHW_SVP) {\r
Pico.ram[0xd864^1] = 1;\r
pv->pending_ints|=0x10;\r
if (pv->reg[0]&0x10) SekInterrupt(4);\r
// render screen\r
if (!PicoSkipFrame)\r
{\r
- if (!(PicoOpt&0x10))\r
+ if (!(PicoOpt&POPT_ALT_RENDERER))\r
{\r
// Draw the screen\r
#if CAN_HANDLE_240_LINES\r
}\r
\r
// here we render sound if ym2612 is disabled\r
- if (!(PicoOpt&1) && PsndOut) {\r
+ if (!(PicoOpt&POPT_EN_FM) && PsndOut) {\r
int len = PsndRender(0, PsndLen);\r
if (PicoWriteSound) PicoWriteSound(len);\r
// clear sound buffer\r
}\r
\r
if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ\r
- if (Pico.m.z80Run && (PicoOpt&4))\r
+ if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80))\r
z80_int();\r
\r
- while (sects) {\r
+ while (sects)\r
+ {\r
lines += lines_step;\r
\r
SekRunM68k(cycles_68k_vblock);\r
\r
Pico.m.frame_count++;\r
\r
- if (PicoMCD & 1) {\r
+ if (PicoAHW & PAHW_MCD) {\r
PicoFrameMCD();\r
return 0;\r
}\r
\r
// be accurate if we are asked for this\r
- if(PicoOpt&0x40) acc=1;\r
+ if (PicoOpt&POPT_ACC_TIMING) 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 if (PicoOpt&POPT_ALT_RENDERER) 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
+ if (acc)\r
PicoFrameHints();\r
else PicoFrameSimple();\r
\r
notaz.gp2x.de / picodrive.git / blobdiff