Path: utzoo!mnetor!uunet!mcvax!ruuinf!markov
From: markov@ruuinf.UUCP (dr.m.h. overmars)
Newsgroups: comp.sys.atari.st
Subject: Re: fast scrolling
Message-ID: <421@ruuinf.UUCP>
Date: 22 Apr 88 10:00:51 GMT
References: <8804202024.AA18481@cory.Berkeley.EDU>
Organization: Univ of Utrecht, Dept of CS
Lines: 9
Summary: GEM is slow


To get fast scrolling, the first thing to do is to avoid VDI at
all. Just write the Raster routines yourself in Assembly and take care
that everything starts and ends at word boundaries. The overhead caused by
VDI for all the special features is large. Also write the routines for putting
text on the screen yourself (again starting at byte boundaries and not including
all these things like bold etc. ).

Mark Overmars