Path: utzoo!attcan!uunet!mailrus!news-server.csri.toronto.edu!utgpu!watserv1!maytag!watdragon!spurge!ccplumb
From: ccplumb@spurge.uwaterloo.ca (Colin Plumb)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Keyboard input and B-Planes.
Message-ID: <1990Sep24.160844.14012@watdragon.waterloo.edu>
Date: 24 Sep 90 16:08:44 GMT
References: <56519@iuvax.cs.indiana.edu>
Sender: daemon@watdragon.waterloo.edu (Owner of Many System Processes)
Organization: University of Waterloo
Lines: 11

The problem lies in the fact that you're using high resolution (640 pixels
across) with 4 bitplanes.  When this happens, the video data is using most
or more of the chip memory's time, leaving very little for the processor.
If you can get everything to run out of true fast memory (and not the fake
fast memory you get in Commodore-supplied 1-meg machines), you won't have
much of a problem, but the keyboard itself is still on the chip memory bus.

If you can possibly switch to a lower resolution or fewer bitplanes, it would
be the simplest solution.
-- 
	-Colin