HP-IL IC?

[J-F Garnier]

(05-28-2021 03:16 AM)Gene Dorr Wrote:  The processor on my card is also a 68B09 -- the card itself is P/N 19257-60015 (DIV 43 REV A-1). So far it sounds like 1LB3-0003, 1LR4-0002 and 1ML7-0005 are all versions of the HP-IL IC.

I believe the 1LR4 may be a slightly improved version of the original 1LB3 (some bugs or limitations are mentioned in the 1LB3 documentation), then the 1ML7 may be a much later redesign for technology or cost reasons to still support the HP-IL in the GC products.
I have a board with a 1ML7 with date code 9852, driven by a Zilog CPU. Long after after the end of HP-IL in calculators...

(05-28-2021 03:02 AM)Paul Berger (Canada) Wrote:  I have two versions of "Network Interface" cards that are apparently for 5890 gas chronographs.

Did you try to power one of these boards and access it from the HP-IL?
I once tried, but without success, no answer. I was curious to see how these boards would answer to HP-IL ID requests.

J-F