HP48s/g with expanded memory

[Hiwi]

Hi,
from time to time you can find one on ebay, but often they are from an estate of a deceased
and the sellers do not know anything about ports or pinit...

There is no company anymore which does a conversion or upgrade so far as i know.

But you can do it yourself, it is not a rocket sience.
An upgrade is very simple up to 768k. you need only 2 or 3 SRAMS and a flipflop and some wiring.
Many are afraid of opening the HP48, yes that's the most important thing.
But you can do it without leaving any traces...

Ralf