21
votes
Accepted
How do 80x25 characters (each with dimension 9x16 pixels) fit on a VGA display of resolution 640x480?
How does VGA manage to show 720x400 resolution text on a 640x480 display?
This might be your basic misunderstanding here. Displays as used back then and what VGA was designed for, are not a fixed ...
- 213k
21
votes
How do 80x25 characters (each with dimension 9x16 pixels) fit on a VGA display of resolution 640x480?
CRTs don’t have a fixed pixel resolution; early CRTs have fixed timings (25.175 MHz and 28.322 MHz for VGA). VGA 80×25 text mode really does produce 400 lines of 720 pixels, as you determined, with a ...
- 118k
8
votes
How do 80x25 characters (each with dimension 9x16 pixels) fit on a VGA display of resolution 640x480?
They don't fit to 640 pixels as VGA text mode is not 640x480.
640x480 is simply the one of the modes, but not the only mode available. It just happens to be the highest and most commonly known format.
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- 28.3k
4
votes
How do 80x25 characters (each with dimension 9x16 pixels) fit on a VGA display of resolution 640x480?
First of all, it’s worth remembering that an analogue video signal, which is what a VGA card generates, has no inherent horizontal resolution. The signal source generates a specific number of ...
- 21.6k
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