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Wise2Food



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Re: Help with flicker



This sounds like a refresh rate flicker problem. In VGA modes, the screen 
redraws itself 70 times a second, and you must synchronize yourself to this. 
There are a variety of ways to accomplish this. The easiest and most 
well-known way is the following:

void WaitRetrace() {
    asm mov dx,3DAh
l1:
    asm {
        in al,dx
        and al,08h
        jnz l1
    }
l2:
    asm {
        in al,dx
        and al,08h
        jz l2
    }
}

I could explain that, but it would take time - something I have precious 
little of. Run this before you draw each frame - it should help.
-Ender Wiggin
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