[Coco] Video sync issue... (crosspost)

[Rogelio Perea]

Crossposting from comp.sys.m6809 and comp.sys.tandy:

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Hi,

Does anyone know how to perform a vsync in 6809 assembly language when
programming animation on the Dragon/Tandy to prevent flickering graphics?
I'm sure it's something to do with checking an interrupt, but I don't know
how.

Thanks,
Collywobbles

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