HP-75 RAM expansion?

[J-F Garnier]

(10-13-2016 12:13 PM)Martin Hepperle Wrote:  In fact, after reading said article (or was it a nightmare while I slept?) I bought six (4+2 just-in-case) TOSHIBA TC5516AP 2048x8 BIT CMOS Static RAMs and now I cannot locate the article anymore...
And yes, it were FOUR chips to add, not TWO... my mistake.

I remember an article on this subject in the Journal of the French PPC-Toulouse Club, and it was not too difficult to recover it...
Attached are the diagrams, note that it uses a single 8K chip. You may find some information useful.

I once considered to build it, but later I found a cheap 8k RAM module so I didn't do it.

J-F