GeoRAM Schematic
Date: 2002-12-18 09:31:38

Hi All,

I received a GeoRAM expansion the other day which I had bought on eBay to
that I could checkout its memory refresh scheme. It uses 44256 chips, and so
needs a refresh scheme as the VIC accesses won't be enough...

A couple questions:
* before I reverse engineer the refresh logic, has someone else done it?
* memory expansion, apparantly designs were made for this as well as the
1750, etc, but I've never come across them. Has anyone got the upgrade

- Nick


The contents of this email (including any attachments) may be
privileged and confidential. Any unauthorised use of the contents
is expressly prohibited. If you have received this email in error,
please advise us immediately (you can contact us by telephone
on +61 8 9441 2311 by reverse charge) and then permanently
delete this email together with any attachments. We appreciate
your co-operation.

Whilst Orbital endeavours to take reasonable care to ensure
that this email and any attachments are free from viruses or other
defects, Orbital does not represent or warrant that such is explicitly
the case

(C) 2000: Orbital Engine Company (Australia) PTY LTD and its

       Message was sent through the cbm-hackers mailing list

Archive generated by hypermail 2.1.4.