HP75D and data acquisition unit HP3421A

[Sylvain Cote]

(02-28-2024 08:37 AM)hesc Wrote:  In my other HP75D I see 2 empty slots and the third one is occupied by a rather large tele communications unit around the HP75D, I believe.

That should be the 82718A Expansion Pod.

(02-28-2024 11:14 AM)Dave Frederickson Wrote:  If you don't have an I/O ROM you can use the I/O Utilities.

Yep!

But it does not contains the autoloop keyword, so you will have to do it manually.

Code:

assignio ':E1'
assignio ':P1,:M1'

OUTPUT will also be missing, only SENDIO, ENTIO$ & SEND? commands are part of this lex file.
These are lower level than OUTPUT, I do not have the time to do this right now, but later I can rework your test program to use these keywords instead.

Other than here, there is a HP-75 users group that can answer your questions and have all the documents regarding that machine.