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1 | #include "../../PicoInt.h" |
2 | |
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3 | svp_t *svp = NULL; |
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4 | int PicoSVPCycles = 800; // cycles/line |
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5 | |
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6 | static void PicoSVPReset(void) |
7 | { |
8 | elprintf(EL_SVP, "SVP reset"); |
9 | |
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10 | memcpy(svp->iram_rom + 0x800, Pico.rom + 0x800, 0x20000 - 0x800); |
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11 | ssp1601_reset(&svp->ssp1601); |
12 | } |
13 | |
14 | |
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15 | static void PicoSVPLine(int count) |
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16 | { |
17 | // ??? |
18 | // OSC_NTSC / 3.0 / 60.0 / 262.0 ~= 1139 |
19 | // OSC_PAL / 3.0 / 50.0 / 312.0 ~= 1137 |
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20 | ssp1601_run(PicoSVPCycles * count); |
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21 | |
22 | // test mode |
23 | //if (Pico.m.frame_count == 13) PicoPad[0] |= 0xff; |
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24 | } |
25 | |
26 | |
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27 | static int PicoSVPDma(unsigned int source, int len, unsigned short **srcp, unsigned short **limitp) |
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28 | { |
29 | if ((source & 0xfe0000) == 0x300000) |
30 | { |
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31 | elprintf(EL_VDPDMA|EL_SVP, "SVP DmaSlow from %06x, len=%i", source, len); |
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32 | source &= 0x1fffe; |
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33 | source -= 2; |
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34 | *srcp = (unsigned short *)(svp->dram + source); |
35 | *limitp = (unsigned short *)(svp->dram + sizeof(svp->dram)); |
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36 | return 1; |
37 | } |
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38 | else |
39 | elprintf(EL_VDPDMA|EL_SVP|EL_ANOMALY, "SVP FIXME unhandled DmaSlow from %06x, len=%i", source, len); |
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40 | |
41 | return 0; |
42 | } |
43 | |
44 | |
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45 | void PicoSVPInit(void) |
46 | { |
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47 | void *tmp; |
48 | |
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49 | elprintf(EL_SVP, "SVP init"); |
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50 | |
51 | tmp = realloc(Pico.rom, 0x200000 + sizeof(*svp)); |
52 | if (tmp == NULL) |
53 | { |
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54 | elprintf(EL_STATUS|EL_SVP, "OOM for SVP data"); |
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55 | return; |
56 | } |
57 | |
58 | Pico.rom = tmp; |
59 | svp = (void *) ((char *)tmp + 0x200000); |
60 | memset(svp, 0, sizeof(*svp)); |
61 | |
62 | // init ok, setup hooks.. |
63 | PicoRead16Hook = PicoSVPRead16; |
64 | PicoWrite8Hook = PicoSVPWrite8; |
65 | PicoWrite16Hook = PicoSVPWrite16; |
66 | PicoDmaHook = PicoSVPDma; |
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67 | PicoResetHook = PicoSVPReset; |
68 | PicoLineHook = PicoSVPLine; |
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69 | } |
70 | |