From: Andrew Cottrell <andnews AT ihug DOT com DOT oz DOT au>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Writing Directly to Display memory
Date: Wed, 23 Apr 2003 15:59:37 +1000
Organization: ECLiPSE
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

>Hi Guys,
>I have some simple question here,that i hope u guys can easily solve.
>I want to initialise my display in 640*480*24 mode i.e VBE 112 h using
>this function.
>setmode()
>{
>union REGS r;
>r.x.ax=0x4f00;
>r.x.bx=0x112;
>int86(0x10,&r,&r);
>}
>How will i  make sure that my card is set to VBE mode 112 ?
Look at the return codes in the registers. You may need to look at the
VBE spec for this.

>After this i want to write to display memory directly my RGB data
>which is 8 bits each to display a pixel.
>Say my display memory is initialised at 0xA0000000L and I have RGB
>Data with me corresponding to a pixel then how can write this to
>display memory to glow the pixel.?
>Please give your expert comments
I would NOT advise this as you will then haev to include bank
switching code when you get to the 64K boundary.

Overall I would advise looking at Allegeo
(http://alleg.sourceforge.net/) and using it. This will save you allot
of time and effort.

Andrew