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Groups > comp.os.msdos.programmer > #949

Re: Question for EGA/VAG Programmer Veteran

From Ross Ridge <rridge@csclub.uwaterloo.ca>
Newsgroups comp.os.msdos.programmer
Subject Re: Question for EGA/VAG Programmer Veteran
Date 2013-07-15 13:30 -0400
Organization University of Waterloo
Message-ID <ks1bjh$eun$1@rumours.uwaterloo.ca> (permalink)
References <64801135-5268-43cf-a973-db2b74288575@googlegroups.com> <12124419-f094-4ec3-b22a-68aadcf914b4@googlegroups.com>

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<monahan9999@gmail.com> wrote:
>Ross, you may be on to something. The board is behaving as if it=92s expect=
>ing to see a character set somewhere it is not. How does one =93point=94 th=
>e original IBM EGA board to a character set? 

You copy the font to plane 2 of the video card memory (mapped at A0000h)
and set the font offset to 0 (or where ever you've stored the font in
video memory).  VGA cards work the pretty much same way so it's not
too hard to find documentation on the WWW on how to do this.  Use Ralf
Brown's PORTS.LIST to figure out what applies to both EGA and VGA and
what only applies to VGA.

					Ross Ridge

-- 
 l/  //	  Ross Ridge -- The Great HTMU
[oo][oo]  rridge@csclub.uwaterloo.ca
-()-/()/  http://www.csclub.uwaterloo.ca/~rridge/ 
 db  //	  

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Thread

Question for EGA/VAG Programmer Veteran monahan9999@gmail.com - 2013-07-13 15:51 -0700
  Re: Question for EGA/VAG Programmer Veteran "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-07-14 17:30 -0400
    Re: Question for EGA/VAG Programmer Veteran Ross Ridge <rridge@csclub.uwaterloo.ca> - 2013-07-14 19:24 -0400
  Re: Question for EGA/VAG Programmer Veteran monahan9999@gmail.com - 2013-07-14 20:42 -0700
    Re: Question for EGA/VAG Programmer Veteran Ross Ridge <rridge@csclub.uwaterloo.ca> - 2013-07-15 13:30 -0400
      Re: Question for EGA/VAG Programmer Veteran monahan9999@gmail.com - 2013-07-15 21:14 -0700

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