-// 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, Grazvydas "notaz" Ignotas\r
// Free for non-commercial use.\r
\r
// For commercial use, separate licencing terms must be obtained.\r
\r
extern const unsigned char hcounts_32[];\r
extern const unsigned char hcounts_40[];\r
-extern const unsigned short vcounts[];\r
-extern int rendstatus;\r
\r
+#ifndef UTYPES_DEFINED\r
typedef unsigned char u8;\r
typedef unsigned short u16;\r
+typedef unsigned int u32;\r
+#define UTYPES_DEFINED\r
+#endif\r
\r
+int (*PicoDmaHook)(unsigned int source, int len, unsigned short **srcp, unsigned short **limitp) = NULL;\r
\r
-static __inline void AutoIncrement()\r
+static __inline void AutoIncrement(void)\r
{\r
Pico.video.addr=(unsigned short)(Pico.video.addr+Pico.video.reg[0xf]);\r
}\r
{\r
case 1: if(a&1) d=(u16)((d<<8)|(d>>8)); // If address is odd, bytes are swapped (which game needs this?)\r
Pico.vram [(a>>1)&0x7fff]=d;\r
- rendstatus|=0x10; break;\r
+ if (a - ((unsigned)(Pico.video.reg[5]&0x7f) << 9) < 0x400)\r
+ rendstatus |= PDRAW_DIRTY_SPRITES;\r
+ break;\r
case 3: Pico.m.dirtyPal = 1;\r
- //dprintf("w[%i] @ %04x, inc=%i [%i|%i]", Pico.video.type, a, Pico.video.reg[0xf], Pico.m.scanline, SekCyclesDone());\r
Pico.cram [(a>>1)&0x003f]=d; break; // wraps (Desert Strike)\r
case 5: Pico.vsram[(a>>1)&0x003f]=d; break;\r
+ //default:elprintf(EL_ANOMALY, "VDP write %04x with bad type %i", d, Pico.video.type); break;\r
}\r
\r
- //dprintf("w[%i] @ %04x, inc=%i [%i|%i]", Pico.video.type, a, Pico.video.reg[0xf], Pico.m.scanline, SekCyclesDone());\r
AutoIncrement();\r
}\r
\r
-static unsigned int VideoRead()\r
+static unsigned int VideoRead(void)\r
{\r
unsigned int a=0,d=0;\r
\r
case 0: d=Pico.vram [a&0x7fff]; break;\r
case 8: d=Pico.cram [a&0x003f]; break;\r
case 4: d=Pico.vsram[a&0x003f]; break;\r
+ default:elprintf(EL_ANOMALY, "VDP read with bad type %i", Pico.video.type); break;\r
}\r
\r
AutoIncrement();\r
return d;\r
}\r
\r
-static int GetDmaLength()\r
+static int GetDmaLength(void)\r
{\r
struct PicoVideo *pvid=&Pico.video;\r
int len=0;\r
source|=Pico.video.reg[0x16]<<9;\r
source|=Pico.video.reg[0x17]<<17;\r
\r
- dprintf("DmaSlow[%i] %06x->%04x len %i inc=%i blank %i [%i|%i] @ %x",\r
+ elprintf(EL_VDPDMA, "DmaSlow[%i] %06x->%04x len %i inc=%i blank %i [%i] @ %06x",\r
Pico.video.type, source, a, len, inc, (Pico.video.status&8)||!(Pico.video.reg[1]&0x40),\r
- Pico.m.scanline, SekCyclesDone(), SekPc);\r
-\r
- if(Pico.m.scanline != -1) {\r
- Pico.m.dma_bytes += len;\r
- if ((PicoMCD&1) && (PicoOpt & 0x2000)) SekCycleCnt+=CheckDMA();\r
- else SekSetCyclesLeftNoMCD(SekCyclesLeftNoMCD - CheckDMA());\r
- } else {\r
- // be approximate in non-accurate mode\r
- SekSetCyclesLeft(SekCyclesLeft - (len*(((488<<8)/167))>>8));\r
- }\r
+ SekCyclesDone(), SekPc);\r
+\r
+ Pico.m.dma_xfers += len;\r
+ if ((PicoAHW & PAHW_MCD) && (PicoOpt & POPT_EN_MCD_PSYNC)) SekCyclesBurn(CheckDMA());\r
+ else SekSetCyclesLeftNoMCD(SekCyclesLeftNoMCD - CheckDMA());\r
\r
if ((source&0xe00000)==0xe00000) { // Ram\r
pd=(u16 *)(Pico.ram+(source&0xfffe));\r
pdend=(u16 *)(Pico.ram+0x10000);\r
- } else if(PicoMCD & 1) {\r
- dprintf("DmaSlow CD, r3=%02x", Pico_mcd->s68k_regs[3]);\r
+ }\r
+ else if (PicoAHW & PAHW_MCD)\r
+ {\r
+ elprintf(EL_VDPDMA, "DmaSlow CD, r3=%02x", Pico_mcd->s68k_regs[3]);\r
if(source<0x20000) { // Bios area\r
pd=(u16 *)(Pico_mcd->bios+(source&~1));\r
pdend=(u16 *)(Pico_mcd->bios+0x20000);\r
int bank = Pico_mcd->s68k_regs[3]&1;\r
pd=(u16 *)(Pico_mcd->word_ram1M[bank]+(source&0x1fffe));\r
pdend=(u16 *)(Pico_mcd->word_ram1M[bank]+0x20000);\r
- } else {\r
+ } else {\r
DmaSlowCell(source, a, len, inc);\r
return;\r
- }\r
+ }\r
}\r
} else if ((source&0xfe0000)==0x020000) { // Prg Ram\r
u8 *prg_ram = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r
pd=(u16 *)(prg_ram+(source&0x1fffe));\r
pdend=(u16 *)(prg_ram+0x20000);\r
} else {\r
- dprintf("DmaSlow FIXME: unsupported src");\r
+ elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow[%i] %06x->%04x: FIXME: unsupported src", Pico.video.type, source, a);\r
return;\r
}\r
- } else {\r
- if(source<Pico.romsize) { // Rom\r
+ }\r
+ else\r
+ {\r
+ // if we have DmaHook, let it handle ROM because of possible DMA delay\r
+ if (PicoDmaHook && PicoDmaHook(source, len, &pd, &pdend));\r
+ else if (source<Pico.romsize) { // Rom\r
pd=(u16 *)(Pico.rom+(source&~1));\r
pdend=(u16 *)(Pico.rom+Pico.romsize);\r
- } else {\r
- dprintf("DmaSlow: invalid dma src");\r
+ }\r
+ else {\r
+ elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow[%i] %06x->%04x: invalid src", Pico.video.type, source, a);\r
return;\r
}\r
}\r
// overflow protection, might break something..\r
if (len > pdend - pd) {\r
len = pdend - pd;\r
- dprintf("DmaSlow overflow");\r
+ elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow overflow");\r
}\r
\r
switch (Pico.video.type)\r
//if(pd >= pdend) pd-=0x8000; // should be good for RAM, bad for ROM\r
}\r
}\r
- rendstatus|=0x10;\r
+ rendstatus |= PDRAW_DIRTY_SPRITES;\r
break;\r
\r
case 3: // cram\r
}\r
a=(a&0xff00)|a2;\r
break;\r
+\r
+ default:\r
+ elprintf(EL_VDPDMA|EL_ANOMALY, "DMA with bad type %i", Pico.video.type);\r
+ break;\r
}\r
// remember addr\r
Pico.video.addr=(u16)a;\r
unsigned char *vrs;\r
unsigned char inc=Pico.video.reg[0xf];\r
int source;\r
- dprintf("DmaCopy len %i [%i|%i]", len, Pico.m.scanline, SekCyclesDone());\r
+ elprintf(EL_VDPDMA, "DmaCopy len %i [%i]", len, SekCyclesDone());\r
\r
- Pico.m.dma_bytes += len;\r
- if(Pico.m.scanline != -1)\r
- Pico.video.status|=2; // dma busy\r
+ Pico.m.dma_xfers += len;\r
+ Pico.video.status |= 2; // dma busy\r
\r
source =Pico.video.reg[0x15];\r
source|=Pico.video.reg[0x16]<<8;\r
vrs=vr+source;\r
\r
- if(source+len > 0x10000) len=0x10000-source; // clip??\r
+ if (source+len > 0x10000) len=0x10000-source; // clip??\r
\r
- for(;len;len--)\r
+ for (; len; len--)\r
{\r
vr[a] = *vrs++;\r
// AutoIncrement\r
}\r
// remember addr\r
Pico.video.addr=a;\r
- rendstatus|=0x10;\r
+ rendstatus |= PDRAW_DIRTY_SPRITES;\r
}\r
\r
// check: Contra, Megaman\r
unsigned char inc=Pico.video.reg[0xf];\r
\r
len=GetDmaLength();\r
- dprintf("DmaFill len %i inc %i [%i|%i]", len, inc, Pico.m.scanline, SekCyclesDone());\r
+ elprintf(EL_VDPDMA, "DmaFill len %i inc %i [%i]", len, inc, SekCyclesDone());\r
\r
- Pico.m.dma_bytes += len;\r
- if(Pico.m.scanline != -1)\r
- Pico.video.status|=2; // dma busy (in accurate mode)\r
+ Pico.m.dma_xfers += len;\r
+ Pico.video.status |= 2; // dma busy\r
\r
// from Charles MacDonald's genvdp.txt:\r
// Write lower byte to address specified\r
vr[a] = (unsigned char) data;\r
a=(u16)(a+inc);\r
\r
- if(!inc) len=1;\r
+ if (!inc) len=1;\r
\r
- for(;len;len--) {\r
+ for (; len; len--) {\r
// Write upper byte to adjacent address\r
// (here we are byteswapped, so address is already 'adjacent')\r
vr[a] = high;\r
// update length\r
Pico.video.reg[0x13] = Pico.video.reg[0x14] = 0; // Dino Dini's Soccer (E) (by Haze)\r
\r
- rendstatus|=0x10;\r
+ rendstatus |= PDRAW_DIRTY_SPRITES;\r
}\r
\r
-static void CommandDma()\r
+static void CommandDma(void)\r
{\r
struct PicoVideo *pvid=&Pico.video;\r
int len=0,method=0;\r
if (method==3) DmaCopy(len); // VRAM Copy\r
}\r
\r
-static void CommandChange()\r
+static void CommandChange(void)\r
{\r
struct PicoVideo *pvid=&Pico.video;\r
unsigned int cmd=0,addr=0;\r
addr =(cmd>>16)&0x3fff;\r
addr|=(cmd<<14)&0xc000;\r
pvid->addr=(unsigned short)addr;\r
- //dprintf("addr set: %04x", addr);\r
\r
// Check for dma:\r
if (cmd&0x80) CommandDma();\r
}\r
\r
-void PicoVideoWrite(unsigned int a,unsigned short d)\r
+static __inline void DrawSync(int blank_on)\r
+{\r
+ if (Pico.m.scanline < 224 && !(PicoOpt & POPT_ALT_RENDERER) &&\r
+ !PicoSkipFrame && DrawScanline <= Pico.m.scanline) {\r
+ //elprintf(EL_ANOMALY, "sync");\r
+ PicoDrawSync(Pico.m.scanline, blank_on);\r
+ }\r
+}\r
+\r
+PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)\r
{\r
struct PicoVideo *pvid=&Pico.video;\r
\r
+ //if (Pico.m.scanline < 224)\r
+ // elprintf(EL_STATUS, "PicoVideoWrite [%06x] %04x", a, d);\r
a&=0x1c;\r
\r
if (a==0x00) // Data port 0 or 2\r
{\r
- if (pvid->pending) CommandChange();\r
- pvid->pending=0;\r
+ // try avoiding the sync..\r
+ if (Pico.m.scanline < 224 && (pvid->reg[1]&0x40) &&\r
+ !(!pvid->pending &&\r
+ ((pvid->command & 0xc00000f0) == 0x40000010 && Pico.vsram[pvid->addr>>1] == d))\r
+ )\r
+ DrawSync(0);\r
+\r
+ if (pvid->pending) {\r
+ CommandChange();\r
+ pvid->pending=0;\r
+ }\r
\r
// If a DMA fill has been set up, do it\r
if ((pvid->command&0x80) && (pvid->reg[1]&0x10) && (pvid->reg[0x17]>>6)==2)\r
}\r
else\r
{\r
+ // preliminary FIFO emulation for Chaos Engine, The (E)\r
+ if (!(pvid->status&8) && (pvid->reg[1]&0x40) && !(PicoOpt&POPT_DIS_VDP_FIFO)) // active display?\r
+ {\r
+ pvid->status&=~0x200; // FIFO no longer empty\r
+ pvid->lwrite_cnt++;\r
+ if (pvid->lwrite_cnt >= 4) pvid->status|=0x100; // FIFO full\r
+ if (pvid->lwrite_cnt > 4) {\r
+ SekCyclesBurn(32); // penalty // 488/12-8\r
+ if (SekCycleCnt>=SekCycleAim) SekEndRun(0);\r
+ }\r
+ elprintf(EL_ASVDP, "VDP data write: %04x {%i} #%i @ %06x", d, Pico.video.type, pvid->lwrite_cnt, SekPc);\r
+ }\r
VideoWrite(d);\r
}\r
return;\r
\r
if (a==0x04) // Control (command) port 4 or 6\r
{\r
- //dprintf("vdp cw(%04x), p=%i @ %06x [%i]", d, pvid->pending, SekPc, SekCyclesDone());\r
- if(pvid->pending)\r
+ if (pvid->pending)\r
{\r
+ if (d & 0x80) DrawSync(0); // only need sync for DMA\r
// Low word of command:\r
pvid->command&=0xffff0000;\r
pvid->command|=d;\r
pvid->pending=0;\r
CommandChange();\r
- } else {\r
- if((d&0xc000)==0x8000)\r
+ }\r
+ else\r
+ {\r
+ if ((d&0xc000)==0x8000)\r
{\r
// Register write:\r
int num=(d>>8)&0x1f;\r
- if(num==00) dprintf("hint_onoff: %i->%i [%i|%i] pend=%i @ %06x", (pvid->reg[0]&0x10)>>4, (d&0x10)>>4, Pico.m.scanline, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc);\r
- if(num==01) dprintf("vint_onoff: %i->%i [%i|%i] pend=%i @ %06x", (pvid->reg[1]&0x20)>>5, (d&0x20)>>5, Pico.m.scanline, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc);\r
- //if(num==01) dprintf("set_blank: %i @ %06x [%i|%i]", !((d&0x40)>>6), SekPc, Pico.m.scanline, SekCyclesDone());\r
- //if(num==05) dprintf("spr_set: %i @ %06x [%i|%i]", (unsigned char)d, SekPc, Pico.m.scanline, SekCyclesDone());\r
- //if(num==10) dprintf("hint_set: %i @ %06x [%i|%i]", (unsigned char)d, SekPc, Pico.m.scanline, SekCyclesDone());\r
+ int dold=pvid->reg[num];\r
+ int update_irq = 0, blank_on = 0;\r
+ pvid->type=0; // register writes clear command (else no Sega logo in Golden Axe II)\r
+ if (num > 0x0a && !(pvid->reg[1]&4)) {\r
+ elprintf(EL_ANOMALY, "%02x written to reg %02x in SMS mode @ %06x", d, num, SekPc);\r
+ return;\r
+ }\r
+\r
+ switch (num)\r
+ {\r
+ case 0x00:\r
+ elprintf(EL_INTSW, "hint_onoff: %i->%i [%i] pend=%i @ %06x", (dold&0x10)>>4,\r
+ (d&0x10)>>4, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc);\r
+ update_irq = 1;\r
+ break;\r
+ case 0x01:\r
+ elprintf(EL_INTSW, "vint_onoff: %i->%i [%i] pend=%i @ %06x", (dold&0x20)>>5,\r
+ (d&0x20)>>5, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc);\r
+ if (!(d&0x40) && SekCyclesLeft > 390) blank_on = 1;\r
+ update_irq = 1;\r
+ break;\r
+ case 0x05:\r
+ if (d^dold) rendstatus |= PDRAW_SPRITES_MOVED;\r
+ break;\r
+ case 0x0c:\r
+ // renderers should update their palettes if sh/hi mode is changed\r
+ if ((d^dold)&8) Pico.m.dirtyPal = 2;\r
+ break;\r
+ }\r
+ DrawSync(blank_on);\r
pvid->reg[num]=(unsigned char)d;\r
-#if !(defined(EMU_C68K) && defined(EMU_M68K)) // not debugging Cyclone\r
- // update IRQ level (Lemmings, Wiz 'n' Liz intro, ... )\r
- // may break if done improperly:\r
- // International Superstar Soccer Deluxe (crash), Street Racer (logos), Burning Force (gfx), Fatal Rewind (hang), Sesame Street Counting Cafe\r
- if(num < 2) {\r
-#ifdef EMU_C68K\r
- // hack: make sure we do not touch the irq line if Cyclone is just about to take the IRQ\r
- if (PicoCpu.irq <= (PicoCpu.srh&7)) {\r
-#endif\r
- int lines, pints;\r
- lines = (pvid->reg[1] & 0x20) | (pvid->reg[0] & 0x10);\r
- pints = (pvid->pending_ints&lines);\r
- if(pints & 0x20) SekInterrupt(6);\r
- else if(pints & 0x10) SekInterrupt(4);\r
- else SekInterrupt(0);\r
-#ifdef EMU_C68K\r
- // adjust cycles for Cyclone so it would take the int "in time"\r
- if(PicoCpu.irq) {\r
- SekEndRun(24);\r
- }\r
- }\r
-#endif\r
+ if (!update_irq) return;\r
+\r
+#ifndef EMU_CORE_DEBUG\r
+ // update IRQ level\r
+ if (!SekShouldInterrupt) // hack\r
+ {\r
+ int lines, pints, irq=0;\r
+ lines = (pvid->reg[1] & 0x20) | (pvid->reg[0] & 0x10);\r
+ pints = (pvid->pending_ints&lines);\r
+ if (pints & 0x20) irq = 6;\r
+ else if (pints & 0x10) irq = 4;\r
+ SekInterrupt(irq); // update line\r
+\r
+ if (irq) SekEndRun(24); // make it delayed\r
}\r
- else\r
#endif\r
- if(num == 5) rendstatus|=1;\r
- else if(num == 0xc) Pico.m.dirtyPal = 2; // renderers should update their palettes if sh/hi mode is changed\r
- pvid->type=0; // register writes clear command (else no Sega logo in Golden Axe II)\r
- } else {\r
+ }\r
+ else\r
+ {\r
// High word of command:\r
pvid->command&=0x0000ffff;\r
pvid->command|=d<<16;\r
}\r
}\r
\r
-unsigned int PicoVideoRead(unsigned int a)\r
+PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)\r
{\r
- unsigned int d=0;\r
-\r
a&=0x1c;\r
\r
- if (a==0x00) // data port\r
- {\r
- d=VideoRead();\r
- goto end;\r
- }\r
-\r
if (a==0x04) // control port\r
{\r
- d=Pico.video.status;\r
- if(PicoOpt&0x10) d|=0x0020; // sprite collision (Shadow of the Beast)\r
- if(Pico.m.rotate++&8) d|=0x0100; else d|=0x0200; // Toggle fifo full empty (who uses that stuff?)\r
- if(!(Pico.video.reg[1]&0x40)) d|=0x0008; // set V-Blank if display is disabled\r
- if(SekCyclesLeft < 84+4) d|=0x0004; // H-Blank (Sonic3 vs)\r
- // dprintf("sr_read %04x @ %06x [%i|%i]", d, SekPc, Pico.m.scanline, SekCyclesDone());\r
+ struct PicoVideo *pv=&Pico.video;\r
+ unsigned int d;\r
+ d=pv->status;\r
+ //if (PicoOpt&POPT_ALT_RENDERER) d|=0x0020; // sprite collision (Shadow of the Beast)\r
+ if (SekCyclesLeft < 84+4) d|=0x0004; // H-Blank (Sonic3 vs)\r
\r
- Pico.video.pending=0; // ctrl port reads clear write-pending flag (Charles MacDonald)\r
+ d |= ((pv->reg[1]&0x40)^0x40) >> 3; // set V-Blank if display is disabled\r
+ d |= (pv->pending_ints&0x20)<<2; // V-int pending?\r
+ if (d&0x100) pv->status&=~0x100; // FIFO no longer full\r
\r
- goto end;\r
+ pv->pending = 0; // ctrl port reads clear write-pending flag (Charles MacDonald)\r
+\r
+ elprintf(EL_SR, "SR read: %04x @ %06x", d, SekPc);\r
+ return d;\r
}\r
\r
// H-counter info (based on Generator):\r
// check: Sonic 3D Blast bonus, Cannon Fodder, Chase HQ II, 3 Ninjas kick back, Road Rash 3, Skitchin', Wheel of Fortune\r
if ((a&0x1c)==0x08)\r
{\r
- unsigned int hc;\r
+ unsigned int d;\r
+ int lineCycles;\r
\r
- if(Pico.m.scanline != -1) {\r
- int lineCycles=(488-SekCyclesLeft)&0x1ff;\r
- d=Pico.m.scanline; // V-Counter\r
+ lineCycles = (488-SekCyclesLeft)&0x1ff;\r
+ if (Pico.video.reg[12]&1)\r
+ d = hcounts_40[lineCycles];\r
+ else d = hcounts_32[lineCycles];\r
\r
- if(Pico.video.reg[12]&1)\r
- hc=hcounts_40[lineCycles];\r
- else hc=hcounts_32[lineCycles];\r
+ elprintf(EL_HVCNT, "hv: %02x %02x (%i) @ %06x", d, Pico.video.v_counter, SekCyclesDone(), SekPc);\r
+ return d | (Pico.video.v_counter << 8);\r
+ }\r
\r
- //if(lineCycles > 488-12) d++; // Wheel of Fortune\r
- } else {\r
- // get approximate V-Counter\r
- d=vcounts[SekCyclesDone()>>8];\r
- hc = Pico.m.rotate&0xff;\r
- }\r
+ if (a==0x00) // data port\r
+ {\r
+ return VideoRead();\r
+ }\r
\r
- if(Pico.m.pal) {\r
- if(d >= 0x103) d-=56; // based on Gens\r
- } else {\r
- if(d >= 0xEB) d-=6;\r
- }\r
+ return 0;\r
+}\r
\r
- if((Pico.video.reg[12]&6) == 6) {\r
- // interlace mode 2 (Combat Cars (UE) [!])\r
- d <<= 1;\r
- if (d&0xf00) d|= 1;\r
- }\r
+unsigned int PicoVideoRead8(unsigned int a)\r
+{\r
+ unsigned int d;\r
+ a&=0x1d;\r
\r
- dprintf("hv: %02x %02x (%i) @ %06x", hc, d, SekCyclesDone(), SekPc);\r
- d&=0xff; d<<=8;\r
- d|=hc;\r
- goto end;\r
+ switch (a)\r
+ {\r
+ case 0: return VideoRead() >> 8;\r
+ case 1: return VideoRead() & 0xff;\r
+ case 4: // control port/status reg\r
+ d = Pico.video.status >> 8;\r
+ if (d&1) Pico.video.status&=~0x100; // FIFO no longer full\r
+ Pico.video.pending = 0;\r
+ elprintf(EL_SR, "SR read (h): %02x @ %06x", d, SekPc);\r
+ return d;\r
+ case 5:\r
+ d = Pico.video.status & 0xff;\r
+ //if (PicoOpt&POPT_ALT_RENDERER) d|=0x0020; // sprite collision (Shadow of the Beast)\r
+ d |= ((Pico.video.reg[1]&0x40)^0x40) >> 3; // set V-Blank if display is disabled\r
+ d |= (Pico.video.pending_ints&0x20)<<2; // V-int pending?\r
+ if (SekCyclesLeft < 84+4) d |= 4; // H-Blank\r
+ Pico.video.pending = 0;\r
+ elprintf(EL_SR, "SR read (l): %02x @ %06x", d, SekPc);\r
+ return d;\r
+ case 8: // hv counter\r
+ elprintf(EL_HVCNT, "vcounter: %02x (%i) @ %06x", Pico.video.v_counter, SekCyclesDone(), SekPc);\r
+ return Pico.video.v_counter;\r
+ case 9:\r
+ d = (488-SekCyclesLeft)&0x1ff;\r
+ if (Pico.video.reg[12]&1)\r
+ d = hcounts_40[d];\r
+ else d = hcounts_32[d];\r
+ elprintf(EL_HVCNT, "hcounter: %02x (%i) @ %06x", d, SekCyclesDone(), SekPc);\r
+ return d;\r
}\r
\r
-end:\r
-\r
- return d;\r
+ return 0;\r
}\r
notaz.gp2x.de / picodrive.git / blobdiff