HP2100 Minicomputer & Stuff Collection

In the 80s I collected a couple of HP2100 mini computers and associated hardware. I had a full set of manuals: 14 binders and 8 handbooks. Even service logs - repair/installation records, maintenance. Plus several software interface drivers, HP Algol and HP Assembler.

In March of 1998 I needed to sell it all because of a move. Even at the low low price of $2000 I was unsuccessful. I hung on to everything in a storage unit for a few more years until around 2002 when I found a buyer.

HP 2100S Mini Computer

HP 2100S Mini Computer (blue panel) - 32K words; floating-point option, Time Base Generator card, fully loaded.

After a few years it exhibited memory parity errors on EVERY location. Once locations were written to they were operable for the duration of power-on. After restart all memory would again show parity errors.

I also had a 2100A (brown panel). This one worked well.

HP 2155A I/O Extender

HP 2155A I/O Extender

HP 2748B Tape Reader

HP 2748B Tape Reader

 – paper tape; 500 cps

HP 2610A Line Printer

HP 2610A Line Printer

– drum printer; 200 lpm

HP 7261A Optical Mark Reader

HP 7261A Optical Mark Reader

 – reads punched or marked cards

HP 7970B Magnetic Tape Unit

HP 7970B Magnetic Tape Unit

– 9 track; 45 ips; 800 bpi

2752A Teleprinter

2752A Teleprinter

(modified version of the Teletype ASR-33)

with paper taper reader and punch station

HP 2860-Series Cabinets

HP 2860-Series Cabinets

- 2 equipment racks, side-by-side
- standard 19" flange width
- 5 ft high
- 2×8-outlet strips
- 2×cooling fans
- smoked plexiglass front doors (not mounted)
- steel back doors (not mounted)
- more filler panels than shown in photo; total: 3×3½", 2×2¼", 2×7", 2×1½", 2×1¾", 1×8¾", front cooling - fan is 10½" high
- internal fixed rails – 5 pairs
- 1 pair roll-out rails
- mounted on base with wheels – 42"W × 37"D

There was also a multi-port serial RS-232 interface at the back of the cabinet. It may have been 12 ports. I don't remember exactly.

Revised 3 Oct 2015