More than 4 expansion cards ??

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#273

From: M Y Ben Gershon
Date: Fri, 09 Oct 1992 05:23

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Does anyone know of any way to have more than 4 expansion cards on an Acorn
RISC computer (540 in my case)?  I recall reading that it cannot be done
directly (ie some form of internal expansion which would allow more than 4
cards to be USED simultaneously), due to OS limitations, and assumptions made
by various card manufacturers about the address mappings used by the 4 'basic'
cards.

What would interest me would be an expansion which allowed, say, 2 additional
cards to be added, with some form of physical switch to toggle between them
and two of the 'resident' cards.

Has anyone got any ideas?  I am not an electronics buff, so I wouldn't be able
to build anything, but maybe someone out there is developing something... I
am getting absolutely desparate, as I have 4 cards installed, but two newly
released cards also seem very interesting!

Michael Ben-Gershon

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From: mybg@doc.ic.ac.uk (M Y Ben Gershon)
Newsgroups: comp.sys.acorn.tech
Subject: More than 4 expansion cards ??
Date: 9 Oct 1992 06:23:18 +0100
Organization: Department of Computing, Imperial College, University of London, UK.
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Sender: mybg@doc.ic.ac.uk (Michael Ben-Gershon)
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