mirror of
https://github.com/RaySollium99/picodrive.git
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017512f282
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@319 be3aeb3a-fb24-0410-a615-afba39da0efa
63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
#include "../../PicoInt.h"
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svp_t *svp = NULL;
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static void PicoSVPReset(void)
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{
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elprintf(EL_SVP, "SVP reset");
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ssp1601_reset(&svp->ssp1601);
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}
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static void PicoSVPLine(void)
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{
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// ???
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// OSC_NTSC / 3.0 / 60.0 / 262.0 ~= 1139
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// OSC_PAL / 3.0 / 50.0 / 312.0 ~= 1137
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ssp1601_run(100);
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exit(1);
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}
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static int PicoSVPDma(unsigned int source, unsigned short **srcp, unsigned short **limitp)
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{
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if ((source & 0xfe0000) == 0x300000)
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{
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elprintf(EL_VDPDMA|EL_SVP, "SVP DmaSlow from %06x", source);
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source &= 0x1fffe;
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*srcp = (unsigned short *)(svp->ram + source);
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*limitp = (unsigned short *)(svp->ram + sizeof(svp->ram));
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return 1;
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}
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return 0;
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}
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void PicoSVPInit(void)
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{
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void *tmp;
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elprintf(EL_SVP, "SVP init");
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tmp = realloc(Pico.rom, 0x200000 + sizeof(*svp));
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if (tmp == NULL)
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{
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elprintf(EL_STATUS|EL_SVP, "OOM for SVP data");
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return;
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}
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Pico.rom = tmp;
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svp = (void *) ((char *)tmp + 0x200000);
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memset(svp, 0, sizeof(*svp));
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// init ok, setup hooks..
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PicoRead16Hook = PicoSVPRead16;
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PicoWrite8Hook = PicoSVPWrite8;
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PicoWrite16Hook = PicoSVPWrite16;
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PicoDmaHook = PicoSVPDma;
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PicoResetHook = PicoSVPReset;
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PicoLineHook = PicoSVPLine;
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}
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