Path: utzoo!utgpu!water!watmath!clyde!bellcore!faline!ulysses!allegra!mit-eddie!bloom-beacon!gatech!hao!oddjob!mimsy!rab
From: rab@mimsy.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: programming an ega
Keywords: ega
Message-ID: <10216@mimsy.UUCP>
Date: 16 Jan 88 21:04:48 GMT
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 20
Posted: Sat Jan 16 16:04:48 1988

I am trying to write some graphics functions using an ega card
in 640x350 mode.  Can anyone provide me with the gory details
about the memory mapping scheme that these cards use.  In
particular I need to know how to do the memory bank switching
for the different bit planes.  I understand the theory but
I don't have the port addresses or the bit patterns that
need to be written to them.

If you can tell me a good reference to look this stuff up that
would be nice too.  Most of the books that I have don't go into
enough detail to be useful.

(Please don't write to tell me that I can do all of this with
bios interrupt 0x10. I know that.  I am looking for a more
efficient alternative.)

		Thanks in advance, bob

arpa:	rab@mimsy.umd.edu
uucp:	uunet!mimsy!rab