From:	"Graeme Fenwick" <gfenwick AT BYESPAMmetafox DOT freeserve DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Drivers and Allegro Graphics
Date:	Wed, 10 Mar 1999 23:58:44 -0000
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Andrew Green wrote in message ...
>Graeme Fenwick wrote in message <7c1p2c$ebt$3 AT news5 DOT svr DOT pol DOT co DOT uk>...
>>-    Am I right in thinking that if I set a graphics mode using
>>set_gfx_mode(), then the driver for that particular mode/card has to be
>>installed in memory by the user beforehand (unless, like VESA modes, they
>>are already supported in most hardware)? To put it another way, does
>Allegro
>>access these cards through their ordinary DOS drivers? (I suppose I could
>>generalize the question to cover all hardware).

>
>As far as I know all drivers needed are built into allegro

That's what I thought when I first needed to use these functions, but later
on I figured I was wrong- looks like I was right in the first place. Cheers!

or accessed
>through freebsd(which would need to be installed on the system)


Huh?! I thought FreeBSD was a Unix-derived OS, not an addition to DOS. And
if DOS is the only platform Allegro supports at present (yes, I know the
Linux port is in the works), then.... either it's a very convuluted
solution, or I'm missing something.

>>-    Will GFX_VGA (for mode 13h) and GFX_MODEX modes work on any correctly
>>set up VGA system? Come to think of it, are there any general tips for
>>portability when selecting a graphics display under Allegro? (What the
heck
>>are 13h and Mode X anyway?!- maybe that's a more general question....).
>mode 13h is the standard vga 320x200x8 graphics mode.  It should work on
any
>pc in dos mode. mode x I believe is a variation on this in some way It
>should also work on all PC's


That's good... perhaps this isn't the place to ask questions about the
fundamental differences between Mode X and 13h (going by the Allegro manual,
they seem to be two distinct beasts). I'll go off and bug the readers of the
MSDOS groups for an answer instead (good search results notwithstanding).
;-)

--
======================================================================
Graeme Fenwick
            - gfenwick AT BYESPAMmetafox DOT freeserve DOT co DOT uk
            - gfenwick AT BYESPAMfreeuk DOT com

  "Please remove BYESPAM filters when replying by mail"
                               -- WILLIAM SHAKESPEARE, Hamlet.

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