EGA ROM location

 BBS: Inland Empire Archive
Date: 02-11-93 (14:27)             Number: 297
From: EARL MONTGOMERY              Refer#: NONE
  To: ALL                           Recvd: NO  
Subj: EGA ROM location               Conf: (2) Quik_Bas
Two years ago I wrote a EGA/VGA graphics font editor. I was
thinking of posting it here on the echo. But I ran into a
snag (two years is a long time to remember exactly how you
came up with certain routines), it is
BSAVING the fonts from EGA ROM. I had used DEF SEG &HC000
+256. Now when I tried it out the fonts were there but not
in the right location.
Increasing the DEF SEG to &HC000 + 257 put everything right. My question is
how can it change? I thought all video cards keep the
graphics fonts in the same location. When the program was
originally written I had a Paradise Basic VGA card. Now I
have a Paradise Pro VGA card. If the location changes from
card to card this is going to cause me to do some
reprogramming. If the location of the graphics fonts do
change depending on the VGA card in use then I'll have to
find a way to test for the location. Any help will be

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