Found some stuff at the scrapyard
ard at p850ug1.demon.co.uk
Sun Jul 17 23:41:17 CDT 2016
> The HPIL thinkjet version was also used with the hp portable and hp
> portable plus laptops.
> we have some of them in the SMECC here... but back when I was CEO
> Computer Exchange inc we sold lost of these.. it was a small laptop
> with applications in ROM but also had a HPIL 3 1/2 disc and an HPIL
Yes. 80C86 (not 8088) based, there is a 16 bit data bus in there.
The Portable (HP110) has built-in RAM that can't be expanded. One of
the boards contains the processor and a lot of DIP-packaged 8K*8 SRAMs.
The Portable Plus used surface-mount 8K*8 SRAMs and could take more
on a plug-in 'RAM Drawer'.
> Remember to the hp 45 calc.. had HPIL interface also...
I think you mean the HP41 (LCD alphanumeric calculator) or maybe
the HP75 (handheld machine running BASIC, very similar to the HP85
in architecture). The HP45 was a simple-ish non-programmable
scientific calculator with an LED display. And an undocumented
> There was also a gaggle of cards to the PC and the HP 150 TOUCHSCREEN
> that would talk to HPIL and also on IBM side HPIL plus I seem to
> remember HPIB cards too.
The HP150 had HPIB as standard. There was an optional card that
added HPIL and a Centronics port. That Centronics port was a
mess. HP decided to use female DB25s for the serial ports. So to
avoid confusion they used a male DB25 for the Centronics port.
Only problem was the PCB was laid out for a female DB25 using
IBM PC pinouts. With the result that the male version ended up
effectively mirror-reversed, strobe on pin 13, etc.
There were, indeed, HP ISA HPIB and HPIL cards. From memory the
latter (at least) will not run in any reasonbly fast machine (8MHz CPU
clock tops?) There was also an HPIL card for the Integral (portable
unix machine) but I have never seen it. Was there a DIO HPIL card?
> I may be wrong but I remember a HPIL a HPIB a Parallel and maybe a
> Serial interface version of the HP Thinkjet
I have come across 6 versions :
HPIB, HPIL, RS232, Centronics, Portable (battery powered Centronics) and
IIRC an enhanced version of the RS232 one.
> Now there was another interface not to be confused with the HPIL it was
> called HP HIL HP HUMAN INTERFACE LOOP I remember? it was what the mouse
> used on the hp 150 etc...
Yes. They are often confused... But very different to the user and electrically.
> I may still still have my orig HP Thinkjet service training course
I think you can get the service manual for the Thinkjet (probably only
covers the original 4 versions) from the Australian Museum.
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