Problem: amnesic HP-25 Message #1 Posted by J-C Billaud on 24 Aug 2006, 8:56 a.m.
Hello,
I recently bought a HP-25, my first vintage HP, but unfortunately it has some memory problems: I can't neither use the program mode nor the registers.
In fact, when I enter keystrokes in program mode, the step number normally increases, but the step I just entered is still GTO 00 (13 00), the HP does not remember what I typed. In the same way, no matter what I try to put in the registers, when I recall their content it's always 0.
On the other hand, the stack is functional, I can make any calculation I want provided I don't use the program mode or the registers.
Has someone here had tame problem? What can I do about this?
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