Re: [N8VEM-S100:1642] IMSAI 8080 CPU card replacement

Subject: Re: [N8VEM-S100:1642] IMSAI 8080 CPU card replacement

Date: Fri, 10 May 2013 18:48:23 -0700

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I agree. Keep it simply. I plan on using it as a debug aid. If it has an onboard
simply monitor program it would be complete.

Some of John's S100 design use the 74LS682 for RAM addressing. That and a dip switch
could be all thats needed. Control just the top of the address space A15-A08. Would allow
you to drop in an EPROM card if needed.

My $.02 cents

On 05/10/13 04:35 PM, Jack Rubin wrote:

Great if you could disable in 8 or 16K chunks, but the real appeal is just having something known and simple with robust configuration.

Please don’t overdesign it!

Jack

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Crusty OMO
Sent: Friday, May 10, 2013 6:29 PM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:1641] IMSAI 8080 CPU card replacement

John,

One more thing about this board...
As is, it runs great, but perhaps it could use a little more flexibility.

It has the full 64K (local on the same board), but I'm thinking perhaps it should have less or optionally allow some address space from the S-100 bus.
ie, jumper select blocks of address space that are to be gotten from the S-100 bus?

Comments?

:) Josh

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Version: 2013.0.3336 / Virus Database: 3162/6313 - Release Date: 05/10/13

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