Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!samsung!sol.ctr.columbia.edu!cica!iuvax!silver!faheyr
From: faheyr@silver.ucs.indiana.edu (Bob Fahey)
Newsgroups: comp.sys.amiga.tech
Subject: Keyboard input and B-Planes.
Message-ID: <56519@iuvax.cs.indiana.edu>
Date: 5 Sep 90 17:32:19 GMT
Sender: news@iuvax.cs.indiana.edu
Reply-To: faheyr@silver.ucs.indiana.edu (Bob Fahey)
Organization: Indiana University, Bloomington
Lines: 13

Hi there. I am writing a utility in Assembly, and am coming across an unknown
problem. I need to be able to display 16 colors (i.e. 4 bit-planes, 640x200).
When I have the copper set at 3 b-planes, everything works great, but when I
switch to 4 b-planes, everything S-L-O-W-S way down. 

Is this a hardware problem? It seems that when I read the keyboard, and it
is in 4 b-planes, it takes 2 entire updates to get the key. Is this because
I am using a library to read the keys? (I'm hoping that's not what it is, 
because that would involve re-writing the keyboard routine to speed it up.)

                                        Any Suggestions?

                                                Faheyr@iubacs