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more wip SVP code

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@318 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-12-22 20:53:09 +00:00
parent f53f286a8b
commit f8ef8ff710
13 changed files with 399 additions and 24 deletions
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46
Pico/carthw/svp/svp.c
View file

@ -1,7 +1,51 @@
#include "../../PicoInt.h"
svp_t *svp = NULL;
void PicoSVPInit(void)
{
elprintf(0xffff, "SVP");
void *tmp;
elprintf(0xffff, "SVP init");
tmp = realloc(Pico.rom, 0x200000 + sizeof(*svp));
if (tmp == NULL)
{
elprintf(EL_STATUS, "OOM for SVP data");
return;
}
Pico.rom = tmp;
svp = (void *) ((char *)tmp + 0x200000);
memset(svp, 0, sizeof(*svp));
// init ok, setup hooks..
PicoRead16Hook = PicoSVPRead16;
PicoWrite8Hook = PicoSVPWrite8;
PicoWrite16Hook = PicoSVPWrite16;
PicoDmaHook = PicoSVPDma;
}
void PicoSVPReset(void)
{
elprintf(0xffff, "SVP reset");
ssp1601_reset(&svp->ssp1601);
}
int PicoSVPDma(unsigned int source, unsigned short **srcp, unsigned short **limitp)
{
if ((source & 0xfe0000) == 0x300000)
{
elprintf(EL_VDPDMA|0xffff, "SVP DmaSlow from %06x", source);
source &= 0x1fffe;
*srcp = (unsigned short *)(svp->ram + source);
*limitp = (unsigned short *)(svp->ram + sizeof(svp->ram));
return 1;
}
return 0;
}