Posts: 1,755
Threads: 112
Joined: Jan 2005
Hi, John:
John posted:
"However, I've never lost memory. What does the battery do?"
If I'm not wrong, it keeps the contents undisturbed when the module is
*unplugged*. As long as it remains plugged in, the HP-71B batteries keep its contents nice and tidy.
This same concept was extensively used in RAM cards for SHARP handhelds as well, and it allowed their owners to send complicated programs to and fro by simply exchanging cards. It was also useful for backup purposes, of an important application, say.
If you're that interested in the HP-71B and you haven't seen them yet, may I suggest you have a look at my HP-71B related articles/programs for this wonderful machine, available on-line as PDF documents from my web site.
Best regards from V.