15 Jun
2016
15 Jun
'16
11:07 p.m.
Ah, thanks, this is getting awfully close, and jives well with Jay's recollection. Low
frequency spectrum analysis using FFT seems to be the application indeed. Mentions an
"arithmetic booster board" bolted to the bottom of an HP 21MX K (whatever a
K-model is, never heard of it, but seems to be made of an HP 2105 model, I'll look
that up) to improve FFT performance. They call the combo a "5443A" processor.
That's dangerously similar to my 54427 board numbering and "booster" naming
and fits right in with the 74S181 bit slice 20-bit ALU. I haven't found the particular
system that would use an E-series computer, but I'll keep looking in this direction.
Marc
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Paul Birkel
Sent: Wednesday, June 15, 2016 10:44 PM
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: Mystery HP 1000 board
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.
-----Original Message-----
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...
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
HP 5443
05443-60047
05443-60042
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
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