HP-2108A w/64k

Images: http://rikers.org/gallery/hardware-hp2108a

Boot ROMS

Original memory slot contents

Original IO slot contents

Broken IBL

Machine seems functional, but IBL will not load any data. It does set the overflow bit and set P to 177700 so something runs.

I tried moving the RAM around, and it seems to make no difference. After a bit of testing, I determined that the card edge connector on the ribbon cable from the front panel is bad. It's a 3M 3415-0001 50 pin .1" gold plated IDC card edge connector. If anyone wants to send me one, that'd be great. :) I swapped panels with the 2112, and now the 2108 IBL works, and the 2112 does not. :)

Replaced the cable on the front panel, and both are now operational.

Serial

http://www.cs.ubc.ca/~hilpert/e/HP21xx/io12531BCD.html

HP-IB

Picked up a 59310-60101 "BUS INPUT/OUTPUT INTERFACE" to try interfacing with HP-IB / GP-IB / IEEE-488 systems. I don't yet have a cable, but I hope to pickup an HP-9122D to interface with soon.

RikerWiki: HardwareNotes (last edited 2014-02-26 18:51:26 by TimRiker)