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some dma improvements

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no idea if anything needs this, shouldn't hurt either
This commit is contained in:
notaz 2017-09-24 01:27:31 +03:00
parent 7feeb88062
commit 0c7d1ba332
5 changed files with 156 additions and 148 deletions
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17
pico/carthw/svp/svp.c
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@ -91,23 +91,20 @@ static void PicoSVPLine(void)
}
static int PicoSVPDma(unsigned int source, int len, unsigned short **srcp, unsigned short **limitp)
static int PicoSVPDma(unsigned int source, int len, unsigned short **base, unsigned int *mask)
{
if (source < Pico.romsize) // Rom
{
source -= 2;
*srcp = (unsigned short *)(Pico.rom + (source&~1));
*limitp = (unsigned short *)(Pico.rom + Pico.romsize);
return 1;
*base = (unsigned short *)(Pico.rom + (source & 0xfe0000));
*mask = 0x1ffff;
return source - 2;
}
else if ((source & 0xfe0000) == 0x300000)
{
elprintf(EL_VDPDMA|EL_SVP, "SVP DmaSlow from %06x, len=%i", source, len);
source &= 0x1fffe;
source -= 2;
*srcp = (unsigned short *)(svp->dram + source);
*limitp = (unsigned short *)(svp->dram + sizeof(svp->dram));
return 1;
*base = (unsigned short *)svp->dram;
*mask = 0x1ffff;
return source - 2;
}
else
elprintf(EL_VDPDMA|EL_SVP|EL_ANOMALY, "SVP FIXME unhandled DmaSlow from %06x, len=%i", source, len);