Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!texbell!nuchat!paul
From: paul@nuchat.UUCP (Paul Hutmacher)
Newsgroups: comp.sys.apple2
Subject: High Speed SCSI card (WAS Re: KansasFest happened!)
Message-ID: <26650@nuchat.UUCP>
Date: 25 Jul 90 22:46:57 GMT
References: <43263@apple.Apple.COM> <11982@sdcc6.ucsd.edu> <43316@apple.Apple.COM>
Reply-To: paul@nuchat.UUCP (Paul Hutmacher)
Organization: Houston Public Access
Lines: 40

In article <43316@apple.Apple.COM> dlyons@Apple.COM (David A. Lyons) writes:

>(By the way, has anybody else had trouble using the high-speed SCSI card
>after installing the special OS and drivers that come with it, over your
>existing 5.0.2 installation?  My system was hanging about 2/3 of the way
>through my boot, apparently in the middle of a SCSI read.  I solved the
>problem temporarily by turning off the DMA switch on the card, but that
>shouldn't be necessary--I don't have a large memory card or any other DMA
>peripherals in that particular system.)

I had a dickens of a time myself and finally ended up removing *all* the 
5.0.2 stuff and starting over from scratch.

Most of my problems stemmed from an old Rev A Applied Engineering GSRam
that according to AE is *not* DMA compatible and cannot be made DMA compatible
unless you'd like to mail them your fully populated card and $99.00 for a DMA
capable version.

I also found that some of the older Transwarp GS cards are not DMA compatible
and the new chip to fix that problem can be had from AE at no charge.  You can
tell the difference by looking at the top right corner of the TWGS and
examining the chip marked TWGS2.  That chip should have a B rather than an A
on it for DMA compatibility.

The high speed SCSI card is also not going to like some of the older eight foot
long CMS SCSI cables either.  I had to dig up a shorter one and move "Howler,"
my old 20 meg harder closer to the machine.

I like the card though but cannot tell the difference between DMA on and DMA
off right now.  At this time I've got an old Apple ramcard in the machine with
DMA on but am going to have to plug back in my GSRam sooner or later since I 
have grown used to the program space.

Has anyone used a GS Juice 4 meg card with any luck?  Their $299 for four meg
and my recent conversations with AE concerning their memory cards have made me
think of making a change.
-- 
Paul Hutmacher   |       paul@nuchat.UUCP        |Sometimes the only thing a
P.O. Box 66046   | {texbell, uunet}!nuchat!paul  |western savage understands
Houston, TX 77266| paul%nuchat.uucp@uhnix1.uh.edu|are whiskey and rifles and
713/526-0612 CDT |   Smile, you're on usenet.    |an unarmed man like you.