X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FVideoPort.c;h=f5d4e1b8bb64ea19a7820636a858a4f9df7856f7;hb=5de27868df4df82d38901a804ec6fb32eb6ab5a6;hp=024cf6f4e3dc76d82866c51ea7d0d2ae07425a6b;hpb=cc68a136aa179a5f32fe40208371eb9c2b0aadae;p=picodrive.git diff --git a/Pico/VideoPort.c b/Pico/VideoPort.c index 024cf6f..f5d4e1b 100644 --- a/Pico/VideoPort.c +++ b/Pico/VideoPort.c @@ -1,23 +1,30 @@ // This is part of Pico Library // (c) Copyright 2004 Dave, All rights reserved. -// (c) Copyright 2006 notaz, All rights reserved. +// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas // Free for non-commercial use. // For commercial use, separate licencing terms must be obtained. #include "PicoInt.h" +#include "cd/gfx_cd.h" extern const unsigned char hcounts_32[]; extern const unsigned char hcounts_40[]; extern const unsigned short vcounts[]; extern int rendstatus; +#ifndef UTYPES_DEFINED +typedef unsigned char u8; typedef unsigned short u16; +typedef unsigned int u32; +#define UTYPES_DEFINED +#endif +int (*PicoDmaHook)(unsigned int source, int len, unsigned short **srcp, unsigned short **limitp) = NULL; -static __inline void AutoIncrement() +static __inline void AutoIncrement(void) { Pico.video.addr=(unsigned short)(Pico.video.addr+Pico.video.reg[0xf]); } @@ -32,16 +39,16 @@ static void VideoWrite(u16 d) Pico.vram [(a>>1)&0x7fff]=d; rendstatus|=0x10; break; case 3: Pico.m.dirtyPal = 1; - //dprintf("w[%i] @ %04x, inc=%i [%i|%i]", Pico.video.type, a, Pico.video.reg[0xf], Pico.m.scanline, SekCyclesDone()); Pico.cram [(a>>1)&0x003f]=d; break; // wraps (Desert Strike) case 5: Pico.vsram[(a>>1)&0x003f]=d; break; + default:elprintf(EL_ANOMALY, "VDP write %04x with bad type %i", d, Pico.video.type); break; } //dprintf("w[%i] @ %04x, inc=%i [%i|%i]", Pico.video.type, a, Pico.video.reg[0xf], Pico.m.scanline, SekCyclesDone()); AutoIncrement(); } -static unsigned int VideoRead() +static unsigned int VideoRead(void) { unsigned int a=0,d=0; @@ -52,31 +59,14 @@ static unsigned int VideoRead() case 0: d=Pico.vram [a&0x7fff]; break; case 8: d=Pico.cram [a&0x003f]; break; case 4: d=Pico.vsram[a&0x003f]; break; + default:elprintf(EL_ANOMALY, "VDP read with bad type %i", Pico.video.type); break; } - + AutoIncrement(); return d; } -// calculate the number of cycles 68k->VDP dma operation would take -static int DmaSlowBurn(int len) -{ - // test: Legend of Galahad, Time Killers - int burn,maxlen,line=Pico.m.scanline; - - if(line == -1) line=vcounts[SekCyclesDone()>>8]; - maxlen=(224-line)*18; - if(len <= maxlen) - burn = len*(((488<<8)/18))>>8; - else { - burn = maxlen*(((488<<8)/18))>>8; - burn += (len-maxlen)*(((488<<8)/180))>>8; - } - - return burn; -} - -static int GetDmaLength() +static int GetDmaLength(void) { struct PicoVideo *pvid=&Pico.video; int len=0; @@ -93,58 +83,110 @@ static void DmaSlow(int len) u16 *pd=0, *pdend, *r; unsigned int a=Pico.video.addr, a2, d; unsigned char inc=Pico.video.reg[0xf]; - unsigned int source, burn; + unsigned int source; source =Pico.video.reg[0x15]<<1; source|=Pico.video.reg[0x16]<<9; source|=Pico.video.reg[0x17]<<17; - //dprintf("DmaSlow[%i] %06x->%04x len %i inc=%i blank %i [%i|%i]", Pico.video.type, source, a, len, inc, - // (Pico.video.status&8)||!(Pico.video.reg[1]&0x40), Pico.m.scanline, SekCyclesDone()); + elprintf(EL_VDPDMA, "DmaSlow[%i] %06x->%04x len %i inc=%i blank %i [%i] @ %06x", + Pico.video.type, source, a, len, inc, (Pico.video.status&8)||!(Pico.video.reg[1]&0x40), + SekCyclesDone(), SekPc); + + if(Pico.m.scanline != -1) { + Pico.m.dma_xfers += len; + if ((PicoMCD&1) && (PicoOpt & 0x2000)) SekCyclesBurn(CheckDMA()); + else SekSetCyclesLeftNoMCD(SekCyclesLeftNoMCD - CheckDMA()); + } else { + // be approximate in non-accurate mode + SekSetCyclesLeft(SekCyclesLeft - (len*(((488<<8)/167))>>8)); + } - if ((source&0xe00000)==0xe00000) { pd=(u16 *)(Pico.ram+(source&0xfffe)); pdend=(u16 *)(Pico.ram+0x10000); } // Ram - else if(sources68k_regs[3]); + if(source<0x20000) { // Bios area + pd=(u16 *)(Pico_mcd->bios+(source&~1)); + pdend=(u16 *)(Pico_mcd->bios+0x20000); + } else if ((source&0xfc0000)==0x200000) { // Word Ram + source -= 2; + if (!(Pico_mcd->s68k_regs[3]&4)) { // 2M mode + pd=(u16 *)(Pico_mcd->word_ram2M+(source&0x3fffe)); + pdend=(u16 *)(Pico_mcd->word_ram2M+0x40000); + } else { + if (source < 0x220000) { // 1M mode + int bank = Pico_mcd->s68k_regs[3]&1; + pd=(u16 *)(Pico_mcd->word_ram1M[bank]+(source&0x1fffe)); + pdend=(u16 *)(Pico_mcd->word_ram1M[bank]+0x20000); + } else { + DmaSlowCell(source, a, len, inc); + return; + } + } + } else if ((source&0xfe0000)==0x020000) { // Prg Ram + u8 *prg_ram = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6]; + pd=(u16 *)(prg_ram+(source&0x1fffe)); + pdend=(u16 *)(prg_ram+0x20000); + } else { + elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow[%i] %06x->%04x: FIXME: unsupported src", Pico.video.type, source, a); + return; + } + } else { + if (source%04x: invalid src", Pico.video.type, source, a); + return; + } + } - // CPU is stopped during DMA, so we burn some cycles to compensate that - if((Pico.video.status&8)||!(Pico.video.reg[1]&0x40)) { // vblank? - burn = (len*(((488<<8)/167))>>8); // very approximate - if(!(Pico.video.status&8)) burn+=burn>>1; // a hack for Legend of Galahad - } else burn = DmaSlowBurn(len); - SekCyclesBurn(burn); - if(!(Pico.video.status&8)) - SekEndRun(0); - //dprintf("DmaSlow burn: %i @ %06x", burn, SekPc); + // overflow protection, might break something.. + if (len > pdend - pd) { + len = pdend - pd; + elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow overflow"); + } switch (Pico.video.type) { case 1: // vram r = Pico.vram; - for(; len; len--) + if (inc == 2 && !(a&1) && a+len*2 < 0x10000) { - d=*pd++; - if(a&1) d=(d<<8)|(d>>8); - r[a>>1] = (u16)d; // will drop the upper bits - // AutoIncrement - a=(u16)(a+inc); - // didn't src overlap? - if(pd >= pdend) pd-=0x8000; // should be good for RAM, bad for ROM + // most used DMA mode + memcpy16(r + (a>>1), pd, len); + a += len*2; + } + else + { + for(; len; len--) + { + d=*pd++; + if(a&1) d=(d<<8)|(d>>8); + r[a>>1] = (u16)d; // will drop the upper bits + // AutoIncrement + a=(u16)(a+inc); + // didn't src overlap? + //if(pd >= pdend) pd-=0x8000; // should be good for RAM, bad for ROM + } } rendstatus|=0x10; break; - + case 3: // cram - //dprintf("DmaSlow[%i] %06x->%04x len %i inc=%i blank %i [%i|%i]", Pico.video.type, source, a, len, inc, - // (Pico.video.status&8)||!(Pico.video.reg[1]&0x40), Pico.m.scanline, SekCyclesDone()); Pico.m.dirtyPal = 1; r = Pico.cram; for(a2=a&0x7f; len; len--) { - r[a2>>1] = (u16)*pd++;; // bit 0 is ignored + r[a2>>1] = (u16)*pd++; // bit 0 is ignored // AutoIncrement a2+=inc; // didn't src overlap? - if(pd >= pdend) pd-=0x8000; + //if(pd >= pdend) pd-=0x8000; // good dest? if(a2 >= 0x80) break; // Todds Adventures in Slime World / Andre Agassi tennis } @@ -159,12 +201,16 @@ static void DmaSlow(int len) // AutoIncrement a2+=inc; // didn't src overlap? - if(pd >= pdend) pd-=0x8000; + //if(pd >= pdend) pd-=0x8000; // good dest? if(a2 >= 0x80) break; } a=(a&0xff00)|a2; break; + + default: + elprintf(EL_VDPDMA|EL_ANOMALY, "DMA with bad type %i", Pico.video.type); + break; } // remember addr Pico.video.addr=(u16)a; @@ -177,7 +223,11 @@ static void DmaCopy(int len) unsigned char *vrs; unsigned char inc=Pico.video.reg[0xf]; int source; - //dprintf("DmaCopy len %i [%i|%i]", len, Pico.m.scanline, SekCyclesDone()); + elprintf(EL_VDPDMA, "DmaCopy len %i [%i]", len, SekCyclesDone()); + + Pico.m.dma_xfers += len; + if(Pico.m.scanline != -1) + Pico.video.status|=2; // dma busy source =Pico.video.reg[0x15]; source|=Pico.video.reg[0x16]<<8; @@ -205,9 +255,13 @@ static void DmaFill(int data) unsigned char *vr=(unsigned char *) Pico.vram; unsigned char high = (unsigned char) (data >> 8); unsigned char inc=Pico.video.reg[0xf]; - + len=GetDmaLength(); - //dprintf("DmaFill len %i inc %i [%i|%i]", len, inc, Pico.m.scanline, SekCyclesDone()); + elprintf(EL_VDPDMA, "DmaFill len %i inc %i [%i]", len, inc, SekCyclesDone()); + + Pico.m.dma_xfers += len; + if(Pico.m.scanline != -1) + Pico.video.status|=2; // dma busy (in accurate mode) // from Charles MacDonald's genvdp.txt: // Write lower byte to address specified @@ -232,7 +286,7 @@ static void DmaFill(int data) rendstatus|=0x10; } -static void CommandDma() +static void CommandDma(void) { struct PicoVideo *pvid=&Pico.video; int len=0,method=0; @@ -246,7 +300,7 @@ static void CommandDma() if (method==3) DmaCopy(len); // VRAM Copy } -static void CommandChange() +static void CommandChange(void) { struct PicoVideo *pvid=&Pico.video; unsigned int cmd=0,addr=0; @@ -260,22 +314,23 @@ static void CommandChange() addr =(cmd>>16)&0x3fff; addr|=(cmd<<14)&0xc000; pvid->addr=(unsigned short)addr; - //dprintf("addr set: %04x", addr); // Check for dma: if (cmd&0x80) CommandDma(); } -void PicoVideoWrite(unsigned int a,unsigned short d) +PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d) { struct PicoVideo *pvid=&Pico.video; a&=0x1c; if (a==0x00) // Data port 0 or 2 - { - if (pvid->pending) CommandChange(); - pvid->pending=0; + { + if (pvid->pending) { + CommandChange(); + pvid->pending=0; + } // If a DMA fill has been set up, do it if ((pvid->command&0x80) && (pvid->reg[1]&0x10) && (pvid->reg[0x17]>>6)==2) @@ -284,6 +339,18 @@ void PicoVideoWrite(unsigned int a,unsigned short d) } else { + // preliminary FIFO emulation for Chaos Engine, The (E) + if(!(pvid->status&8) && (pvid->reg[1]&0x40) && Pico.m.scanline!=-1 && !(PicoOpt&0x10000)) // active display, accurate mode? + { + pvid->status&=~0x200; // FIFO no longer empty + pvid->lwrite_cnt++; + if (pvid->lwrite_cnt >= 4) pvid->status|=0x100; // FIFO full + if (pvid->lwrite_cnt > 4) { + SekCyclesBurn(32); // penalty // 488/12-8 + if (SekCycleCnt>=SekCycleAim) SekEndRun(0); + } + elprintf(EL_ASVDP, "VDP data write: %04x {%i} #%i @ %06x", d, Pico.video.type, pvid->lwrite_cnt, SekPc); + } VideoWrite(d); } return; @@ -291,7 +358,6 @@ void PicoVideoWrite(unsigned int a,unsigned short d) if (a==0x04) // Control (command) port 4 or 6 { - //dprintf("vdp cw(%04x), p=%i @ %06x [%i]", d, pvid->pending, SekPc, SekCyclesDone()); if(pvid->pending) { // Low word of command: @@ -304,34 +370,31 @@ void PicoVideoWrite(unsigned int a,unsigned short d) { // Register write: int num=(d>>8)&0x1f; - //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); - //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); + if(num==00) elprintf(EL_INTSW, "hint_onoff: %i->%i [%i] pend=%i @ %06x", (pvid->reg[0]&0x10)>>4, + (d&0x10)>>4, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc); + if(num==01) elprintf(EL_INTSW, "vint_onoff: %i->%i [%i] pend=%i @ %06x", (pvid->reg[1]&0x20)>>5, + (d&0x20)>>5, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc); //if(num==01) dprintf("set_blank: %i @ %06x [%i|%i]", !((d&0x40)>>6), SekPc, Pico.m.scanline, SekCyclesDone()); - //if(num==05) dprintf("spr_set: %i @ %06x [%i|%i]", (unsigned char)d, SekPc, Pico.m.scanline, SekCyclesDone()); //if(num==10) dprintf("hint_set: %i @ %06x [%i|%i]", (unsigned char)d, SekPc, Pico.m.scanline, SekCyclesDone()); pvid->reg[num]=(unsigned char)d; -#if !(defined(EMU_C68K) && defined(EMU_M68K)) // not debugging Cyclone +#ifndef EMU_CORE_DEBUG // update IRQ level (Lemmings, Wiz 'n' Liz intro, ... ) // may break if done improperly: - // International Superstar Soccer Deluxe (crash), Street Racer (logos), Burning Force (gfx), Fatal Rewind (hang), Sesame Street Counting Cafe - if(num < 2) { -#ifdef EMU_C68K - // hack: make sure we do not touch the irq line if Cyclone is just about to take the IRQ - if (PicoCpu.irq <= (PicoCpu.srh&7)) { -#endif - int lines, pints; + // International Superstar Soccer Deluxe (crash), Street Racer (logos), Burning Force (gfx), + // Fatal Rewind (crash), Sesame Street Counting Cafe + if (num < 2) + { + if (!SekShouldInterrupt) // hack + { + int lines, pints, irq=0; lines = (pvid->reg[1] & 0x20) | (pvid->reg[0] & 0x10); pints = (pvid->pending_ints&lines); - if(pints & 0x20) SekInterrupt(6); - else if(pints & 0x10) SekInterrupt(4); - else SekInterrupt(0); -#ifdef EMU_C68K - // adjust cycles for Cyclone so it would take the int "in time" - if(PicoCpu.irq) { - SekEndRun(24); - } + if(pints & 0x20) irq = 6; + else if(pints & 0x10) irq = 4; + SekInterrupt(irq); // update line + + if (irq) SekEndRun(24); // make it delayed } -#endif } else #endif @@ -348,12 +411,13 @@ void PicoVideoWrite(unsigned int a,unsigned short d) } } -unsigned int PicoVideoRead(unsigned int a) +PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a) { unsigned int d=0; - + a&=0x1c; + if (a==0x00) // data port { d=VideoRead(); @@ -362,15 +426,18 @@ unsigned int PicoVideoRead(unsigned int a) if (a==0x04) // control port { - //dprintf("sr_read @ %06x [%i|%i]", SekPc, Pico.m.scanline, SekCyclesDone()); - d=Pico.video.status; - if(PicoOpt&0x10) d|=0x0020; // sprite collision (Shadow of the Beast) - if(Pico.m.rotate++&8) d|=0x0100; else d|=0x0200; // Toggle fifo full empty (who uses that stuff?) - if(!(Pico.video.reg[1]&0x40)) d|=0x0008; // set V-Blank if display is disabled - if(SekCyclesLeft < 84+4) d|=0x0004; // H-Blank (Sonic3 vs) + struct PicoVideo *pv=&Pico.video; + d=pv->status; + if (PicoOpt&0x10) d|=0x0020; // sprite collision (Shadow of the Beast) + if (!(pv->reg[1]&0x40)) d|=0x0008; // set V-Blank if display is disabled + if (SekCyclesLeft < 84+4) d|=0x0004; // H-Blank (Sonic3 vs) - Pico.video.pending=0; // ctrl port reads clear write-pending flag (Charles MacDonald) + d|=(pv->pending_ints&0x20)<<2; // V-int pending? + if (d&0x100) pv->status&=~0x100; // FIFO no longer full + pv->pending=0; // ctrl port reads clear write-pending flag (Charles MacDonald) + + elprintf(EL_SR, "SR read: %04x @ %06x", d, SekPc); goto end; } @@ -387,7 +454,7 @@ unsigned int PicoVideoRead(unsigned int a) // |---------------------|--------------------------| // E4 (hc[0x43]==0) 07 B1 // 40 // E8 (hc[0x45]==0) 05 91 // 32 - + // check: Sonic 3D Blast bonus, Cannon Fodder, Chase HQ II, 3 Ninjas kick back, Road Rash 3, Skitchin', Wheel of Fortune if ((a&0x1c)==0x08) { @@ -401,7 +468,7 @@ unsigned int PicoVideoRead(unsigned int a) hc=hcounts_40[lineCycles]; else hc=hcounts_32[lineCycles]; - if(lineCycles > 488-12) d++; // Wheel of Fortune + //if(lineCycles > 488-12) d++; // Wheel of Fortune } else { // get approximate V-Counter d=vcounts[SekCyclesDone()>>8]; @@ -420,7 +487,7 @@ unsigned int PicoVideoRead(unsigned int a) if (d&0xf00) d|= 1; } - //dprintf("hv: %02x %02x (%i) @ %06x", hc, d, SekCyclesDone(), SekPc); + elprintf(EL_HVCNT, "hv: %02x %02x (%i) @ %06x", hc, d, SekCyclesDone(), SekPc); d&=0xff; d<<=8; d|=hc; goto end;