Path: utzoo!utgpu!watmath!grwalter
From: grwalter@watmath.waterloo.edu (Fred Walter)
Newsgroups: comp.sys.amiga
Subject: 2090a (was Re: GVP - The company that lies...
Message-ID: <24730@watmath.waterloo.edu>
Date: 31 Mar 89 04:44:01 GMT
References: <8249@xanth.cs.odu.edu> <321@mohawk.cs.utexas.edu> <4397@enea.se>
Reply-To: grwalter@watmath.waterloo.edu (Fred Walter)
Organization: U. of Waterloo, Ontario
Lines: 20

In article <4397@enea.se> tope@enea.se (Tommy Petersson) writes:
>In article <321@mohawk.cs.utexas.edu> bryan@cs.utexas.edu writes:
>I have a B2000 with the A2620 card and a total of
>5MB memory (2meg 32-bit on the A2620). The GVP doesn't DMA which slows
>things down, A2090A does DMA which slows things down... (if You  have
>several bit-planes and overscan). 

In theory the problem is either much reduced or eliminated by having 
read fast ram - of which you have 4 meg. I have a 2090a and real fast ram
(which I put the hard disk's buffers in) and a SCSI (28ms) drive. I run
interlaced and overscanned all the time.

I have never had the 'slow-down' problem. Another person with the same
drive and a 2090a but no 'real' fast (as opposed to the pseudo-fast ram
that really is chip-ram in disquise) has the problem.

If you are worried about the drive running slow, ask your local dealer if he'd
mind if you carted your Amiga into the store so you could try out the
controller (before you buy it) to see if it slows down.