HP 71B RAM: has anybody big ones to sell?

[rprosperi]

(06-19-2021 01:33 AM)Garth Wilson Wrote:  My card-reader-port RAM module is 96KB from CMT. CMT did in fact offer up to 160KB, and I drooled over it, but 96KB is all I felt I could afford at the time. Later I added a 64KB front-port ram module. I never ran out of RAM, but I probably had it 80 or 90% full, mostly with huge data arrays. There was one project where I formed Intel Hex files up to 384KB and transferred them to the PC over RS-232; but since I didn't have enough RAM to do it all at once, I sent each line as it was formed, and a GWBASIC program on the PC tacked it onto the end of the file being built on the hard disc.

@Garth - Do you recall when or where you saw a 160KB module from CMT? I've looked (!) for evidence of a CMT 160KB module in the past but have never been able to find a brochure, or ad or even a catalog listing. EduCALC carried all the CMT modules from when they were introduced until they dropped all the 71 stuff in 1990 and there never was a 160KB module listed. I have some CMT ad sheets as well as original copies of CMT's "Hand-Held Solutions" newsletters that list all their memory products and none of them list the 160KB module.

While it may have existed, it seems there would be some evidence of it... somewhere...