Re: No luck with HP25s Message #11 Posted by Luiz C. Vieira (Brazil) on 20 July 2012, 10:50 a.m., in response to message #10 by Harald
Hi, Harald.
IIRC, the ROM/anode driver has the basic, elementary set of functions that might be common to all (mostly) units, like stack/register manipulation and basic arithmetic/scientific computing, as we find in the HP21. The complementary ROM, the one closer to the ACT, probably adds programming handling and extra stack/register manipulation.
But this is some brain work of mine, though. Anyway, there is a homepage I could not find the address where all known IC's with their ID's, function and calculator they are found are listed. I copied the page for future consulting, but it is not in this computer, though. Surely a better description of the ROM's contents will be found there.
Success!
Luiz (Brazil)
Edited: 20 July 2012, 10:52 a.m.
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