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Article #324Re: VGA memory (Can I use more than 64k?)
From: Elan Feingold
Date: Sat, 08 Aug 1992 15:20
Date: Sat, 08 Aug 1992 15:20
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>Hmm. As far as I know, for the 320x200x256 mode, you can only get >the one page. One can actually access the four pages using the same techniques described in DDJ. It involves changing the registers so that when you write on byte in video memory, it corresponds to 4 pixels. Therefore 64*4 = 256kB. You choose what pixels to write with masking. See DDJ for more details. Elan -- --------------------------------------------------------------------------| | Elan Feingold | Chevy Chase after being asked by a Howard Stern | | CS/EE Depts. | interviewer whether he still wore a toupee: | | Cornell University | "Ask him [Stern] if he wants me to put his | | Ithaca NY 14850 | dentist in a higher tax bracket." | --------------------------------------------------------------------------
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Path: arc1-ca.pugleaf.net!sparky!uunet!dtix!darwin.sura.net!wupost!usc!rpi!batcomputer!tasha.cheme.cornell.edu!elan From: elan@tasha.cheme.cornell.edu (Elan Feingold) Newsgroups: comp.os.msdos.programmer Subject: Re: VGA memory (Can I use more than 64k?) Message-ID: <1992Aug8.152059.10494@tc.cornell.edu> Date: 8 Aug 92 15:20:59 GMT References: <1992Aug8.082148.14605@news.ysu.edu> Sender: news@tc.cornell.edu Reply-To: elan@tasha.cheme.cornell.edu (Elan Feingold) Organization: Cornell University Lines: 19 Nntp-Posting-Host: tasha.cheme.cornell.edu