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-boun...@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-boun...@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 <jw...@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-boun...@classiccmp.org] On Behalf Of > CuriousMarc > Sent: Wednesday, June 15, 2016 9:49 PM > To: cctalk@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 > > > > > >
