Mystery HP 1000 board
pbirkel at gmail.com
Thu Jun 16 00:44:17 CDT 2016
See: http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1977-10.pdf Figure 4
Shows some of those other parts as well in the block diagram. Uses a "HP 21MX K-Series Computer".
Model 5420A Digital Signal Analyzer.
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of CuriousMarc
Sent: Thursday, June 16, 2016 1:16 AM
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: Mystery HP 1000 board
You beat me! You got one hit. How did you search for that? I come up dry...
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Pete Lancashire
Sent: Wednesday, June 15, 2016 8:50 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Mystery HP 1000 board
Well there are 20 bits of ALU ....
And this guy has one and some other boards
05443-60031 MIOB Interface
05443-60050 Booster Microcode
05443-60057 C (13803F?)
05443-60071 A (22803F)
NO Connection with the site/person/etc .. just passing it on
On Wed, Jun 15, 2016 at 8:00 PM, Jay West <jwest at classiccmp.org> wrote:
> I have one of those boards. You sent me an email about it and I
> replied a week ago :)
> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of
> Sent: Wednesday, June 15, 2016 9:49 PM
> To: cctalk at classiccmp.org
> Subject: Mystery HP 1000 board
> Can anyone identify this HP board (see link to pictures)?
> It was at under the main board of a newly acquired HP 1000-E, next to
> the firmware board. It says HP 54427-60050 Booster Microcode. It has 5
> bitslice SN 74S181 chips at the back. So I surmise maybe it's a late
> ALU booster upgrade?
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