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some dma improvements
[picodrive.git]
/
pico
/
carthw
/
svp
/
svp.c
diff --git
a/pico/carthw/svp/svp.c
b/pico/carthw/svp/svp.c
index
1bccb3f
..
8861de0
100644
(file)
--- a/
pico/carthw/svp/svp.c
+++ b/
pico/carthw/svp/svp.c
@@
-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
{
{
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);
}
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);
}
else
elprintf(EL_VDPDMA|EL_SVP|EL_ANOMALY, "SVP FIXME unhandled DmaSlow from %06x, len=%i", source, len);