HP Forums

Hello,

Perhaps this is well-known, but I was astonished to see that there is a newer version of the HP-97 service manual availabe at
https://literature.hpcalc.org/
This one is dated June 1982 compared to the previous one that is dated August 1976; there is another font and the pictures are sharper. The scan is very good.

best regards
Jonas

Hello Jonas,

thanks a lot for this link - at least for me it was new information.

Best regards

Karl

Hello,

Also note the "Service notes" at the end, here some experiences are collected, and also disussing a ROM update policy for older ROM that cause some errors.

best regards
Jonas

Thanks for pointing to this new service manual. It shows both the old and new Logic circuit board layouts.