A very weird HP48G

[EdS2]

(09-26-2021 10:51 PM)Cristian Arezzini Wrote:  On the faq linked above, there are two links to pages that should describe expansions like this, but both links are broken.

Wayback Machine to the rescue, I think:
HP 48 Calculator Unofficial Upgrade Page ("Whopping 4MegaByte for HP48G?" on geocities)
Info about upgrading to 768k. (Stefano Garavaglia)
Upgrading by yourself the RAM of your HP48G to 256K (Stefano Garavaglia)

(See also Stefano's home page, here and also here.)