You beat me! You got one hit. How did you search for that? I come up dry...
Marc
-----Original Message-----
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
http://nevadabarry.com/electron.html#HP%20Test%20Equipment
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
 CuriousMarc
 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)?
 
https://goo.gl/photos/BBuAV1oozWNSqeUTA
 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?
 Marc