lib/ultralib/src/io/vi.c


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#include "PRinternal/macros.h"
#include "PR/os_internal.h"
#include "PR/R4300.h"
#include "PR/rcp.h"
#include "PRinternal/viint.h"

// TODO: this comes from a header
#ident "$Revision: 1.17 $"

static __OSViContext vi[2] ALIGNED(0x8) = { 0 };
__OSViContext* __osViCurr = &vi[0];
__OSViContext* __osViNext = &vi[1];

void __osViInit(void) {
    bzero(vi, sizeof(vi));
    __osViCurr = &vi[0];
    __osViNext = &vi[1];
    __osViNext->retraceCount = 1;
    __osViCurr->retraceCount = 1;
    __osViNext->framep = (void*)K0BASE;
    __osViCurr->framep = (void*)K0BASE;

    if (osTvType == OS_TV_TYPE_PAL) {
        __osViNext->modep = &osViModePalLan1;
    } else if (osTvType == OS_TV_TYPE_MPAL) {
        __osViNext->modep = &osViModeMpalLan1;
    } else {
        __osViNext->modep = &osViModeNtscLan1;
    }

    __osViNext->state = VI_STATE_BLACK;
    __osViNext->control = __osViNext->modep->comRegs.ctrl;

    while (IO_READ(VI_CURRENT_REG) > 10) { // wait for vsync?
    }

    IO_WRITE(VI_CONTROL_REG, 0); // pixel size blank (no data, no sync)
    __osViSwapContext();
}