Re: Synchronising code with the scan line

[philip@labtam.labtam.oz.au (Philip Stephens)]

Todd P. Whitesel writes:

>Be warned that if you use $C02E-C02F you will not be compatible with the
>Video Overlay Card, unless its input is the IIgs composite video out.

  Is it important for my game to be VOC compatible?  

>The only way to be VOC compatible and do stuff like this is to use scan line
>interrupts, and even then it's not particularly pretty because of the
>overhead per interrupt.

  Well, as it turns out I would only need to set two scan line interrupts
to implement the flicker-free animation I need (since my screen copy
routine takes less than two refresh cycles), but unless there is a need
for VOC compatibility I'd prefer not to go this route.

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