HP 9836, HP 86 ??

13 Jul 1997

...
   The HP86 is
basically an HP85 without the built-in monitor,tape drive,
 or printer, but with GPIB as standard. The 9121 is a single-sided version of
 the 9122 if that's any help.  
 Ok, you've lost me on that one. What is the GPIB? 

GPIB = General-Purpose Interface Bus. Aka IEEE-488, and very similar to
HPIB (= Hewlett-Packard Interface bus). HP were the company who designed it,
but it turns up on all sorts of machines.

It's an 8-bit parallel interface using a 24 pin connector. 8 pins are ground,
8 are data, 3 are handshake, and 5 are bus control/management. It was
originally designed to link up lab equipment (DVMs, counters, digital 'scopes,
etc), but HP use it as a general peripheral bus (disk drives, plotters,
printers, etc) on some of their micros. Commodore used it for much the same
purpose (although with looser timing requirements) on the PETs

...
  David Williams - Computer Packrat 
-tony

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HP 9836, HP 86 ??