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MorsGames
GitHub Repository: MorsGames/sm64plus
 Path: blob/master/lib/src/__osViInit.c
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#include "libultra_internal.h"

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#include "hardware.h"

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#ifdef VERSION_SH

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extern s32 D_SH_80000300; // Potentially a TV type

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#endif

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#ifndef VERSION_JP

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extern u32 osTvType;

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#endif

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OSViContext sViContexts[2] = { 0 };

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OSViContext *__osViCurr = &sViContexts[0];

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OSViContext *__osViNext = &sViContexts[1];

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#ifdef VERSION_EU

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u32 osViClock = 0x02E6D354; // used for audio frequency calculations

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u32 sTvType = TV_TYPE_PAL;

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#elif !defined(VERSION_SH)

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u32 sTvType = TV_TYPE_NTSC;

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u32 osViClock = 0x02E6D354;

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#endif

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extern OSViMode D_80334990;

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extern OSViMode D_803349E0;

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#if defined(VERSION_EU) || defined(VERSION_SH)

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extern OSViMode D_80302FD0;

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#endif

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void __osViInit(void) {

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//#ifdef VERSION_JP

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#ifdef VERSION_US

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    sTvType = osTvType;

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#endif

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    bzero(sViContexts, sizeof(sViContexts));

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    __osViCurr = &sViContexts[0];

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    __osViNext = &sViContexts[1];

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    __osViNext->retraceCount = 1;

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    __osViCurr->retraceCount = 1;

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#if defined(VERSION_EU)

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    if (osTvType == TV_TYPE_PAL) {

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        __osViNext->modep = &D_80334990;

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        osViClock = 0x02F5B2D2;

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    } else if (osTvType == TV_TYPE_MPAL) {

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        __osViNext->modep = &D_803349E0;

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        osViClock = 0x02E6025C;

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    } else {

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        __osViNext->modep = &D_80302FD0;

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        osViClock = 0x02E6D354;

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    }

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#elif defined(VERSION_SH)

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    __osViNext->buffer = (void *) 0x80000000;

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    __osViCurr->buffer = (void *) 0x80000000;

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    if (osTvType == TV_TYPE_PAL) {

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        __osViNext->modep = &D_80334990;

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    } else if (osTvType == TV_TYPE_MPAL) {

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        __osViNext->modep = &D_803349E0;

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    } else {

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        __osViNext->modep = &D_80302FD0;

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    }

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#else

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#ifdef VERSION_JP

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    if (sTvType != TV_TYPE_PAL)

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#else

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    if (sTvType == TV_TYPE_NTSC)

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#endif

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    {

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        __osViNext->modep = &D_80334990;

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        osViClock = 0x02E6D354;

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    } else {

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        __osViNext->modep = &D_803349E0;

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#if defined(VERSION_JP)

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        osViClock = 0x02F5B2D2;

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#elif defined(VERSION_US)

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        osViClock = 0x02E6025C;

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#endif

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    }

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#endif

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    __osViNext->unk00 = 0x20;

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    __osViNext->features = __osViNext->modep->comRegs.ctrl;

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#ifndef VERSION_JP

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    while (HW_REG(VI_CURRENT_REG, u32) > 0xa) {

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        ;

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    }

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    HW_REG(VI_STATUS_REG, u32) = 0;

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#endif

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    __osViSwapContext();

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}

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