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From: dyer@spdcc.COM (Steve Dyer)
Newsgroups: comp.sys.ibm.pc
Subject: EGA programming help needed
Message-ID: <199@spdcc.COM>
Date: Mon, 20-Jul-87 02:01:12 EDT
Article-I.D.: spdcc.199
Posted: Mon Jul 20 02:01:12 1987
Date-Received: Tue, 21-Jul-87 00:39:49 EDT
Organization: S.P. Dyer Computer Consulting, Cambridge MA
Lines: 16
Keywords: color 640x350 mode

I've never really understood how to get beneath the BIOS to program
the EGA board in 640x350 APA color mode.  I never had any trouble
when it was hooked up to a monochrome monitor in 640x350 APA mono
mode--I just wrote to the display addresses and everything worked.
This approach seems to fail when using an enhanced color display.
Can anyone tell me the sequence of operations I must perform if I
want to write a bitmap in color APA mode (though you can assume, for
simplicity's sake that I'm only interested in 'monochrome' emulation.)
I have the Options and Adapters manual as well as the Seminar Proceedings,
but both are pretty obtuse.

Thanks,
-- 
Steve Dyer
dyer@harvard.harvard.edu
dyer@spdcc.COM aka {ihnp4,harvard,linus,ima,bbn,m2c}!spdcc!dyer