Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!crdgw1!uunet!mcsun!ukc!dcl-cs!bryant
From: bryant@comp.lancs.ac.uk (Michael Bryant)
Newsgroups: comp.sys.amiga.hardware
Subject: A1000 MEMORY
Message-ID: <1279@dcl-vitus.comp.lancs.ac.uk>
Date: 3 May 91 14:09:33 GMT
Reply-To: bryant@comp.lancs.ac.uk (Michael Bryant)
Organization: Department of Computing at Lancaster University, UK.
Lines: 35

I am wanting to get some fun (music etc) out of an A1000 I've had around
for a while on a dedicated task.  It's usually attached to a 1060 Sidecar,
which has some uses - notably access to a hard-card on the PC side. 

The problem is lack of memory, particularly when driving the Sidecar, as
the 1000 only has its original 512K.  What I want is some CHEAP expansion
options. 

Accessory support for the 1000 seems almost non-existent in UK ads.,
although there are endless tantalising ads. for A500 512K expansion boards
at manageable prices (c#30).

Am I being too naive in supposing there must be some reasonably
straightforward relationship between the A1000 expansion bus and the A500
trap-door socket? I don't mind wielding a soldering iron, so if it were
only a matter of a few decoder chips etc., I'd be keen to try a DIY job on
linking up an A500 memory board. The A1000 bus is passed through to a
socket inside the Sidecar, so it could even be housed there.

So the kind of help I need:-

    *  Are there any DIY circuit plans/diagrams etc. for the kind of
       project I've outlined?
    *  Does anyone have info. on the A500 trap-door connector (and ideally
       how it relates to the expansion bus)?
    *  Are there any UK sources for memory expansion actually intended for
       the Sidecar (its manual talks of 1Meg boards being available), or
       DIY versions of this approach?
    *  Any other ideas?

Thanks.
---------------------------
Michael Bryant                                  bryant@uk.ac.lancs.comp
Department of Linguistics
University of Lancaster