Path: utzoo!attcan!uunet!mcvax!kth!enea!tope
From: tope@enea.se (Tommy Petersson)
Newsgroups: comp.sys.amiga
Subject: Re: 2090a (was Re: GVP - The company that lies...
Message-ID: <4403@enea.se>
Date: 1 Apr 89 17:45:09 GMT
References: <8249@xanth.cs.odu.edu> <321@mohawk.cs.utexas.edu> <4397@enea.se> <24730@watmath.waterloo.edu>
Reply-To: tope@enea.se (Tommy Petersson)
Organization: ENEA DATA AB, Sweden
Lines: 30
UUCP-Path: uunet!enea!tope

In article <24730@watmath.waterloo.edu> grwalter@watmath.waterloo.edu (Fred Walter) writes:
-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.

I don't have the 'slow-down' problem, but the 'read-write error problem'.
(Maybe it's a worse incarnation of the slow-down caused by PAL machines'
extra lines). I get read-write rrors all the time when having many bit-
planes, and have to click retry on the WorkBench screen.

-
-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.

He. Here in Sweden You can't try anything that exotic. The only (almost)
hardware they sell that is non-Commodore is disc drives. I have to
import hard cards and such...