RK8E M993 - test-drb@ccmp.vtda.org

27 Nov 2000

...
 Date: Mon, 20 Nov 2000 13:09:31 -0800 (PST)
From: Ethan Dicks &lt;ethan_dicks(a)yahoo.com&gt;

- --- David Gesswein &lt;djg(a)drs-esg.com&gt; wrote:
  I thought that the RK8E needed the IC 
Perhaps.  I've never owned a working RK8E.

  and the original cable I am using with my RK8E
does have it installed.  
That's pretty suggestive.  OTOH, perhaps that's there for RK01/RK03
compatibility?  (Just a WAG)

I have looked further.  The IC etc seems to just buffer the Omnibus
power ok signal to drive the RK05 power good.  The later card just
connects them.  I tried a C card without the IC in my computer and seemed
to work fine.  (Watch out, the red stripe was not on the pin 1 side
of my C versions of the cable)

Looks like any M993 may work fine but I didn't try to track down how
the RK05 generates it's DC low or if it changed between versions.

I have put pictures of the boards at http://www.pdp8.net/rk05/rk05.shtml

...
   The RK8E (with
M993C) and RK05 schematics are on my web site 
Roger.  As I said, though, I have a set, too.

I was trying to go back in the archive and see what had been said (I think
my memory refresh failed awhile ago) but I can't find a working archive.

The www.classiccmp.org seems to stopped in August.  www.retrobytes.org
seems to also stopped in August and was putting everything in April.

Does anybody know of a good archive?

David Gesswein
http://www.pdp8.net/  -- Old computers with blinkenlights