17 Jul
2002
17 Jul
'02
7:33 p.m.
I wrote:
I've scanned the HP-IL specifications and the HP-IL chip manual, but I
don't have the kit documentation, which had the schematics for the
converter and various other useful information.
> It might use HP-HIL, Hewlett-Packard Human
Interface Loop.
Tony wrote:
Are you sure that's _loop_? HP-HIL is not
physically a loop. It's a
point-to-point serial interface.
It's my understanding that electrically it forms a loop, because the
last device loops the data back. I could be wrong -- it wouldn't be the
first time.
Amd there's an I/O card for the HP150 that adds an
8 bit parallel port
(normally used for a Centronics printe) and an HPIL port.
Forgot about that one. I'd like to get one for my 150.
the 1LB3,
pulse transformers, HP-IL connectors, passive components,
and documentation. I built an interface card for the Apple ][, which
almost
IIRC, it also contained a couple of microcontrollers that contained the
code to allow you to make the 82166 HPIL -> parallel converter. And
some development software (HP41 DevIL ROM, HP75 IOCMDS lexfile). I've
never seen this kit complete, but I do have what I believe to be the
documentation for it.