Related to my other questions, I'm writing a simple OS, it'll be a long time before I get to much graphics, but I'll try & find out now. I've been writing some graphics code in assembler, but I can't find out how to get a resolution higher that 640 x 480 - which is fairly useless.
If you have any questions about my question, please message me before answering.
2007-01-07 04:52:36 · 3 answers · asked by Mark R 2 in Computers & Internet ➔ Programming & Design
That completely depends on the card.
I'm reaching faaar back now, but I believe you
have to find the interrupt for the address of the card,
and place a certain value into the "resolution" address.
Good luck finding the documentation for the card!
2007-01-07 04:58:02 · answer #1 · answered by ZressE 3 · 0⤊ 0⤋
Unless your video card has an on board BIOS extension you'll have to load a driver for it. The BIOS extension or driver will contain INT10 (video BIOS) call extensions to kick the graphics card into higher res modes.
2007-01-07 05:00:04 · answer #2 · answered by Del Piero 10 7 · 0⤊ 0⤋
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2016-10-30 06:18:11 · answer #3 · answered by Anonymous · 0⤊ 0⤋