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Article #772

Re: VGA PC: Multiple pages in Mode 13h?

#772
From: Jerry Shekhel
Date: Tue, 18 Aug 1992 18:29
31 lines
2126 bytes
then@vipunen.hut.fi (Tomi  H Engdahl) writes:
>
>[multiple pages in 13h]
>
>You can't do it in stadard Mode 13h. You have to go to tweaked VGA modes
>to do multiple pages. Look for Mode X (320x240 with 256 colors) from
>Dr Dobb's journal. Another possibility is Mode Y, which was explained
>in this newsgroup some time ago.
>

This is damn unfortunate.  Standard VGA has what, 256K of video RAM, but
there's no way to access beyond the first 64K in Chain4 mode?!  That
really sucks.  I found (in the Ferraro book) a way to do it with the
ET4000, and I'm sure it's possible with all the other major SVGA chipsets,
but I want to be sure my program works on *all* VGA cards.

In light of all this, I'd like to use Mode Y.  Could someone please repost
the SetMode code for Mode Y?  Thanks in advance.

>
>Tomi.Engdahl@hut.fi            "Don't force it; get a larger hammer"
>
--
+-------------------+-----------------------+--------------------------------+
| Jerry J. Shekhel  | Molecular Simulations | Time just fades the pages      |
| Drummers do it... | Inc.  Waltham, MA USA | in my book of memories.        |
|    ... In rhythm! |     (617) 890-2888    |              -- Guns N' Roses  |
+-------------------+-----------------------+--------------------------------+
|           ...! [ princeton mit-eddie bu sunne ] !polygen!jerry             |
|                            jerry@polygen.com                               |
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References: <1992Aug17.173418.17990@ctr.columbia.edu> <THEN.92Aug18200225@vipunen.hut.fi>

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From: jerry@connection.prospect.com (Jerry Shekhel)
Subject: Re: VGA PC: Multiple pages in Mode 13h?
Organization: Molecular Simulations, Inc.
References: <1992Aug17.173418.17990@ctr.columbia.edu> <THEN.92Aug18200225@vipunen.hut.fi>
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