27 Nov
2000
27 Nov
'00
11:35 p.m.
Date: Mon, 20 Nov 2000 13:09:31 -0800 (PST)
From: Ethan Dicks <ethan_dicks(a)yahoo.com>
- --- David Gesswein <djg(a)drs-esg.com> wrote:
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
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)
The RK8E (with
M993C) and RK05 schematics are on my web site
Roger. As I said, though, I have a set, too.