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- Newsgroups: comp.lang.pascal
- Subject: VGA graphics modes
- Message-ID: <93025.103244FC1@psuvm.psu.edu>
- From: <FC1@psuvm.psu.edu>
- Date: Mon, 25 Jan 1993 10:32:44 EST
- Organization: Penn State University
- Lines: 7
-
- Can anyone tell me how and where a VGA graphics screen is stored?
- A specific example is : in 16 color - 640-by-480 resolution I know that
- each pixel requires 4 bits and storage starts at A000h:0000h but where are
- the 4 bits for the pixel at (0,0)? If I generate random pixels with random
- colors, save some area of the screen to disk and then restore I lose all colors
- except black and white and some pixels are "turned off". Perhaps someone knows
- a good reference. Thanks in advance.
-