HP-91 OOPs

[rprosperi]

(07-17-2024 11:56 PM)teenix Wrote:  It would seem that the 91 and the 97 were on the engineers minds quite early on. The 91 internal plastic assemblies have the mounting hardware for the card reader and slots for the ribbon cable.

Interesting! Thanks for sharing this Tony, it fills in some little discussed history. Long, long ago, probably at an HHC meeting in the early 80's, I was told by (someone) from HP that the 91 introduction was delayed over internal discussions, planning, etc. about these features and which model would have what, but at the time, it didn't register as a notable comment to dig into as at that time, these were merely 'old models' and not of interest to me from a historical perspective.

What is the mfg date of the sample you see this in?

The 91 was introduced in March '76 and the 97 in July of '76, so it's possible they changed over to the newer style case with the mounting h/w, etc. once the 97 design was completed to only source one master part? Just speculating... but interesting to me now.