Date:	Tue, 4 Feb 1997 16:32:24 +0100 (MET)
From:	Jan Safranek <xsafran2 AT informatics DOT muni DOT cz>
To:	konference <djgpp AT delorie DOT com>, listserv AT muni DOT cz
Subject:	Virtual screen in ALLEGRO
Message-ID:	<Pine.SGI.3.95.970204162507.29212A-100000@aisa.fi.muni.cz>
MIME-Version:	1.0

I use allegro 2.11 with 640x480 graphics and
I need 4 "pages" - I initialize graphics with
set_gfx_mode(GFX_AUTODETECT, 640, 480, 640, 4*480)

But if I display VIRTUAL_H and VIRTUAL_W, I get 1024 x 1024. This size of
virtual screen support only 2 "pages" so I must always swap pages from/to
memory and it slows down the program.

Is it bug in allegro or in VESA standard? (I tested it on 6 computers with
VESA 2.0)

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