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partial gmv implementation

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@6 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2006-12-25 15:17:54 +00:00
parent 4f67228034
commit 312e9ce192
8 changed files with 109 additions and 48 deletions
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23
Pico/VideoPort.c
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@ -58,6 +58,7 @@ static unsigned int VideoRead()
return d;
}
#if 0
// calculate the number of cycles 68k->VDP dma operation would take
static int DmaSlowBurn(int len)
{
@ -75,6 +76,7 @@ static int DmaSlowBurn(int len)
return burn;
}
#endif
static int GetDmaLength()
{
@ -93,14 +95,15 @@ 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; // , burn;
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());
dprintf("DmaSlow[%i] %06x->%04x len %i inc=%i blank %i [%i|%i] @ %x",
Pico.video.type, source, a, len, inc, (Pico.video.status&8)||!(Pico.video.reg[1]&0x40),
Pico.m.scanline, SekCyclesDone(), SekPc);
if ((source&0xe00000)==0xe00000) { pd=(u16 *)(Pico.ram+(source&0xfffe)); pdend=(u16 *)(Pico.ram+0x10000); } // Ram
else if(source<Pico.romsize) { pd=(u16 *)(Pico.rom+(source&~1)); pdend=(u16 *)(Pico.rom+Pico.romsize); } // Rom
@ -116,8 +119,12 @@ static void DmaSlow(int len)
#else
Pico.m.dma_bytes += len;
#endif
if(!(Pico.video.status&8))
SekEndRun(0);
//if(!(Pico.video.status&8))
// SekEndRun(0);
//Pico.m.dma_endcycles = 0;//SekCyclesLeft;
//Pico.m.dma_endcycles -= Pico.m.dma_endcycles>>3; // hack
SekSetCyclesLeft(SekCyclesLeft - CheckDMA());
// CheckDMA();
// dprintf("DmaSlow burn: %i @ %06x", burn, SekPc);
switch (Pico.video.type)
@ -138,8 +145,6 @@ static void DmaSlow(int len)
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--)
@ -314,8 +319,8 @@ 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) 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==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());