HP 41C + Memory Module (HP82106A)

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HP 41C + Memory Module (HP82106A)

Postby Chris » Tue Dec 14, 2010 10:22 pm

Hi Folks,

I have a short question: My HP41C has an installed Memory Module (HP82106A). Despite of that it shows "00 REG 46" by pressing the "PRGM"-Button. No programmed stuff.

So, without the memory module the same effect (00 REG 46). Do I have to do some special installation things for "waking up" the memory module or is it just not working?

Chris.
Chris
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Re: HP 41C + Memory Module (HP82106A)

Postby dlachieze » Wed Dec 15, 2010 4:42 pm

Hi Chris,

What you see when you go to PRGM mode is the number of registers available for program memory. By default it is 46 which means that on a bare HP-41C which has 63 registers of memory, 17 are assigned to data storage.
When you add a 82106A module, you’re adding 64 new registers that by default are assigned to data storage.
You should have now 64+17=81 storage registers, which you check by entering a number to X, then STO 80, CLx, RCL 80.
You can change the split between storage and program with the SIZE command: for example with SIZE 20 you’re changing the memory assignment to have 20 storage registers, if you go to PRGM mode you should now have more program memory.

Didier
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