Date: Thu, 6 Apr 2000 13:35:52 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Robin Johnson <robbat2 AT home DOT com>
cc: djgpp AT delorie DOT com
Subject: Re: Text Colors
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On Thu, 6 Apr 2000, Robin Johnson wrote:

> In a few old demos, I have seen the color of the text in textmode changed from
> the default 16 colors, from eg, to 15 shades of green, any comments on how to
> accomplish this in DJGPP?

You need to reprogram your VGA to use a different color palette.  Each of 
the 16 colors is actually an index into a table used by VGA to fetch the 
actual color; you need to change that table.

There are BIOS functions to reprogram VGA as explained above.  DJGPP 
doesn't provide library function for that, so you will need to call 
__dpmi_int directly.

I would imagine that Allegro and GRX have functions to do that.