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Article #46618Re: DOS video memory in DJGPP
From: Paul Shirley
Date: Fri, 04 Nov 1994 20:02
Date: Fri, 04 Nov 1994 20:02
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1884 bytes
S.Hull@bradford.ac.uk "S HULL" writes: >James Bielman (jamesjb@CSOS.ORST.EDU) wrote: >: Does anyone know where DJGPP maps the beginning of the >: VGA memory to? In desperation I tried writing to >: 0xA0000000 but it crashed on me with a seg. violation. >: Any ideas? Thankx a lot. : -=- James -=- >: Internet: jamesjb@csos.orst.edu > >I downloaded DJGPP a couple of days ago to take a look and have the same >problem. It mentioned that the first 1Mb of physical memory was mapped to >E0000000 so I tried writing to E00A0000, it didn't crash but I saw no >output. I don't want to use the drivers included, I want to write my own. > >Is there anybody seriously using DJGPP for game developement out there? If >so could someone with a few answers put together a mini faq or something as >I see a lot of people with questions like this. > I have no problem accessing it at 0xd0000000 :-) The docs suggest that it may be located elsewhere depending on which memory manager is installed so check the docs. -- Paul Shirley: Coffee Hunter Extreme
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 11318c,3c2b9b0cb32b965f X-Google-Attributes: gid11318c,public X-Google-Thread: fe306,3c2b9b0cb32b965f X-Google-Attributes: gidfe306,public X-Google-ArrivalTime: 1994-11-04 12:02:22 PST Newsgroups: gnu.gcc.help,rec.games.programmer From: PS@teeny.demon.co.uk (Paul Shirley) Path: arc1-ca.pugleaf.net!nntp.gmd.de!newsserver.jvnc.net!nntpserver.pppl.gov!princeton!rutgers!gatech!howland.reston.ans.net!pipex!demon!teeny.demon.co.uk!PS Subject: Re: DOS video memory in DJGPP References: <39bk5k$kkp@columbia.acc.brad.ac.uk> Organization: TWG Reply-To: PS@teeny.demon.co.uk X-Newsreader: Demon Internet Simple News v1.27 Lines: 26 Date: Fri, 4 Nov 1994 20:02:22 +0000 Message-ID: <783979342snz@teeny.demon.co.uk> Sender: usenet@demon.co.uk