On (05 Jun 97) Barry Block wrote to Jerry Coffin...
 BB> Hello Jerry,
 BB> My vga card is an ET-4000HI isa 1mb.
 BB> Even this will put my system in 50 line mode.
 BB> ;80xxx - Martin Preuss 27-May-97 2:2426/5060.62
 BB> ;Put the screen in 80x50 text mode
 BB> mov ax,1112h
 BB> int 10h
 BB> int 20h
 JC> Yes, this will work on a card that supports VESA extensions.
 JC> The code I posted is designed to work with any VGA card in
 JC> existence, whether it supports VESA extensions or not.
 BB>      That's good to know.  However...
 BB>      The ET-4000HI v8.02 (1992) does not directly support VESA.
 BB>      A separate driver must be installed. It is not.
Actually, you're right - I should have looked at VESA modes before I
said that.  Nearly every SVGA card will allow you to set its extended
modes simply by supplying different mode numbers to int 10/function 0.
However, the same basic principle applies: a number that works for one
card won't work for another, and/or may set an entirely different mode
on another.
One excercise that can be interesting is to simply loop through all
possible mode values to see what each produces.  Some cards seem to
support a few modes they don't document...
    Later,
    Jerry.
... The Universe is a figment of its own imagination.
--- PPoint 1.90
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