Nathaniel G H writes:
> I have been pulling my hair out for a while with some low
> level code I'm writing, and I'd like some help.
>
> Hardware ports 3D0h through 3DFh (controlled by the IN and
> OUT instructions) can be used to control the graphics
> adapter. I need some sort of reference material that can at
> least hint at what these ports do. (I only need to work with
> standard EGA/VGA text-mode functions, not anything really
> fancy.)
>
> Please help me find some material like this, or let me know
> where I should ask. I have already figured out that search
> engines don't help much with this, and most everybody's code
> that I examined wasn't commented well enough to give me the
> clues I need.
Not exactly you want but a little help for test
src/usr.sbin/pcvt/vgaio
> Any help will be greatly appreciated.
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