From: Alan Bork <borka AT execpc DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Graphic Speed and memory
Date: Thu, 22 Oct 1998 12:31:52 -0500
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

> First of all, I'd like to know which of those takes longer to refresh?
> 
> 800x600x15bit
> 640x480x32bit
> 
> Second, how do you calculate how much memory it takes?

I am not sure about the refresh but the memory is easy enough.
First note that the 15 bit will be treated as 16 bit and just 
throwing away the extra bit.

16 bit is 2 bytes
32 bit is 4 bytes 
(we all know that so...)

800 * 600 * 2 = 960000 bytes or 937.5 KB
640 * 480 * 4 = 1228800 bytes or just over 1.17 MB