Presumably there is a video buffer somewhere which
will display any pixels that you choose to put there,
without there being any activity from the GPU part of the
video controller?

How is its area, frame rate and X and Y pixel range determined?

Also, for dynamic video such as DVB there must be some means of
instructing the graphics processor how to overwrite that area?

Has there been published any disassembly of the graphics library
to work out what is going on so that 64 bitters could drive it
from A64?

Yours etc,
Confused from Tunbridge Wells

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