Article View: comp.sys.ibm.pc.programmer
Article #1487Re: VGA smooth scrolling problem
From: Sean Malloy
Date: Wed, 07 Mar 1990 14:55
Date: Wed, 07 Mar 1990 14:55
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1606 bytes
In article <1892@qualcom.qualcomm.com> fpa@qualcomm.com (Franklin Antonio) writes: >ea@max.u.washington.edu writes... >> I am trying to write an assembly routine which smoothly scrolls (one >>pixel at a time) a VGA text screen. I use the Preset Row Scan Register >Check out the Start Address Registers. They allow you to move whole character >widths or heights without moving characters in memory. I have never seen >a program that actually implemented smooth scrolling on a VGA, so let us >know if you succeed! It wasn't written specifically for the VGA, but STYPE does smooth scrolling on both an EGA and a VGA, with adjustable scroll speed and pausing. It's a replacement for 'type [filename] | more' or 'more [filename]' (depending on whether you use the DOS 'more' or a more intelligently implemented one). Sean Malloy | "The Crystal Wind is the Navy Personnel Research & Development Center | Storm, and the Storm is Data, San Diego, CA 92152-6800 | and the Data is Life." malloy@nprdc.navy.mil | -- _Emerald Eyes_, D.K. Moran
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!ucsd!nprdc!malloy From: malloy@nprdc.arpa (Sean Malloy) Newsgroups: comp.sys.ibm.pc.programmer Subject: Re: VGA smooth scrolling problem Message-ID: <6339@skinner.nprdc.arpa> Date: 7 Mar 90 14:55:48 GMT References: <13409.25f447ea@max.u.washington.edu> <1892@qualcom.qualcomm.com> Reply-To: malloy@nprdc.arpa (Sean Malloy) Organization: Navy Personnel R&D Center, San Diego Lines: 21