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
