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Path: utzoo!decvax!decwrl!sun!idi!oliveb!bb
From: bb@oliveb.UUCP (Bart Berger)
Newsgroups: net.micro.att
Subject: Re: help with 6300 memory expansion
Message-ID: <673@oliveb.UUCP>
Date: Wed, 12-Feb-86 19:35:54 EST
Article-I.D.: oliveb.673
Posted: Wed Feb 12 19:35:54 1986
Date-Received: Fri, 14-Feb-86 00:12:18 EST
References: <146000002@uiucuxc>
Reply-To: bb@oliveb.UUCP (Bart Berger)
Distribution: na
Organization: Olivetti ATC; Cupertino, Ca
Lines: 32

In article <146000002@uiucuxc> Michael Mrazek writes:

> 1) Which memory expansion boards work with the 6300?

We've used the AST Megaplus II and Thesys Fastcard I in our Olivetti
M24's, which are essentially the same PC as the AT&T 6300, with no
problems.  The only memory compatibility problem I've heard of is
on multi-function boards with a serial or parallel port, which
conflicts with the 6300's built in port.  Make sure the add-on card
can be configured as the second port, not the primary port.

> 3) Is the AT&T memory expansion board any better than the others?

Well, the AT&T board and the Thesys Fastcard I use the 6300's full 16-bit
bus.  That means that word accesses on even addresses (like instruction
fetches) take one bus cycle, not two.  Whether you notice the speed
increase probably depends on your application:  faster instruction fetches
don't help much if your upper memory contains only data.  The Thesys card
might be a little cheaper (around $325 list price a year ago).

I think the AT&T and Thesys cards don't add any additional wait states,
but that's probably true of most other expansion cards also.

> I would greatly appreciate any replies.  Thanks for your time.

You're welcome.

Bart M. Berger
Olivetti A.T.C.
Cupertino, CA

As usual, the comments above are mine, not Olivetti's.