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Vanilla defaulting to 720*400, just my monitor?

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Under dos. I'm guessing that my monitor is just wrongly reporting this, being a later model (2000) crt?

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Even text mode is reported as 720 * 400, under DOS, at least if you're using a (S)VGA video card. It has to do with the HSYNC frequency: VGA monitors and most cards cannot reliably sync lower than 31kHz, so for a VSYNC of 70Hz that works out to about 400 lines. Lower resolutions are obtained by line doubling. Older standards like EGA or computers like the Amiga could sync lower, at 15kHz.

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