z80_init(); // init even if we aren't going to use it\r
\r
PicoInitMCD();\r
+ PicoSVPInit();\r
\r
SRam.data=0;\r
\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
+ // clear all memory of the emulated machine\r
+ memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);\r
+\r
+ memset(&Pico.video,0,sizeof(Pico.video));\r
+ memset(&Pico.m,0,sizeof(Pico.m));\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
+\r
+ if (PicoMCD & 1)\r
+ PicoPowerMCD();\r
+\r
+ PicoReset();\r
+}\r
+\r
+int PicoReset(void)\r
{\r
unsigned int region=0;\r
int support=0,hw=0,i=0;\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(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.m,0,sizeof(Pico.m));\r
- Pico.video.pending_ints=0;\r
+ if (PicoMCD & 1)\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
- 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
-\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
\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
+ Pico.video.status = 0x3408 | pal; // 'always set' bits | vblank | pal\r
\r
PsndReset(); // pal must be known here\r
\r
- if (PicoResetHook) PicoResetHook();\r
+ // create an empty "dma" to cause 68k exec start at random frame location\r
+ if (Pico.m.dma_xfers == 0 && !(PicoOpt&0x10000))\r
+ Pico.m.dma_xfers = rand() & 0x1fff;\r
\r
if (PicoMCD & 1) {\r
- PicoResetMCD(hard);\r
+ PicoResetMCD();\r
return 0;\r
}\r
\r
\r
// dma2vram settings are just hacks to unglitch Legend of Galahad (needs <= 104 to work)\r
// same for Outrunners (92-121, when active is set to 24)\r
+// 96 is VR hack\r
static const int dma_timings[] = {\r
-83, 167, 166, 83, // vblank: 32cell: dma2vram dma2[vs|c]ram vram_fill vram_copy\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)/82, (488<<8)/167, (488<<8)/166, (488<<8)/83,\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
static int CheckIdle(void)\r
{\r
- int i, state[0x22];\r
+ int i, state[0x24];\r
\r
// See if the state is the same after 2 steps:\r
- SekState(state); SekStep(); SekStep(); SekState(state+0x11);\r
- for (i = 0x10; i >= 0; i--)\r
- if (state[i] != state[i+0x11]) return 0;\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
static __inline void getSamples(int y)\r
{\r
#if SIMPLE_WRITE_SOUND\r
+ if (y != 224) return;\r
PsndRender(0, PsndLen);\r
if (PicoWriteSound) PicoWriteSound(PsndLen);\r
PsndClear();\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
if (PicoLineHook) PicoLineHook(sects*lines_step);\r
}\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
+ }\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
#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
for (y=0;y<224;y++) PicoLine(y);\r
}\r
\r
+int PicoGetStat(pstat_t which)\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
+ }\r
+ return 0;\r
+}\r
+\r
// callback to output message from emu\r
void (*PicoMessage)(const char *msg)=NULL;\r
\r
notaz.gp2x.de / picodrive.git / blobdiff