Memory Modules for HP-75C

[floppy]

(03-19-2024 09:49 AM)Dave Frederickson Wrote:  

(03-19-2024 09:06 AM)floppy Wrote:  What part number?

The Expansion Pod is the 82718A. The 64k Electronic Disc is OPT #064. Usually the Expansion Pods are found with a 75 attached, like this one.
https://www.ebay.com/itm/364578500258

+1
Page 7 of https://literature.hpcalc.org/community/...-rm-en.pdf
..
Electronic Disc
The HP 82718A Option 032 or 064 provides either 32 or 64 kbytes of additional random access memory
(RAM). This additional RAM simulates a mass storage device such as a digital cassette or disc drive.
Unlike a mechanical device, however, you get fast data transfer and rugged, reliable operation.
..