From:	Endlisnis <s257m AT unb DOT ca>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: 640 x 400
Date:	Wed, 26 Aug 1998 19:31:31 -0300
Organization:	NBTel Internet
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Message-ID:	<35E48CC2.9539F049@unb.ca>
References:	<01bdd031$0b208f20$0818d3d4 AT billy> <35e32e3f DOT 8663182 AT news DOT telepac DOT pt>
NNTP-Posting-Host:	fctnts07c01.nbnet.nb.ca
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Jorge Bruno S. S. Morgado wrote:

> Mode 640x400x256, is an SVGA mode, so, is address varies from card to
> card, but using the VESA extensions you should be able to get to it,
> using the mode number 100h:
> [snip]
> Howhever, this mode has an advantage over the other SVGA modes, it
> requires no bank switching, so drawing a pixel on it, its just like
> drawing a pixel in mode X (off course that the dimensions are not
> equal).

    Are you sure?  I haven't tried accessing it like XMode, but it can also be
accessed by normal bank-switchingl.  And I would think that using the VESA
bank-switch would not be a dis-advantage.  In PMode, a VESA switch is slower,
but there is only one border instead of 1000's.  To blit a bit-map onto any
portion of the screen I'd only have to do 1 switch instead of (at least) 4.
--
     (\/) Endlisnis (\/)
          s257m AT unb DOT ca
          Endlisnis AT GeoCities DOT com
          Endlis AT nbnet DOT nb DOT ca

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