I have obtained an HP-75 Memory Expansion Pod with a working HP75 but I have no documetation on what the pod offers or how it works.
It has two phone jacks on the back.
Seems to have a modem connection as when it starts up it says "initializing modem" or something like that. Hard to catch that message.
The HP Museum says it is a 7271A but the photo shows more digits (hard to read) so I don't know the real part number.
If it is a memory exp. pod, does it come with extra memory? How much and how does one access it?
The "Mem" function only returns about 22K, when executed.
Anyone know where I can get information on this?
Also, I notice that my 75 has some sort of internal module, in the battery compartment, that says backup. What is that and how is it used?