HP Forum Archive 19

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Commodore PR 100 Message #1 Posted by Nigel Bamber on 21 May 2010, 4:48 p.m. The references in another topic mentioning the Commodore SR7919 and Commodore PR100 - which were my first two calculators and it got my memory banks working. I knew the PR100 inside out, one undocumented feature relates to the 9M function which would apply the same arithmetic function to each of it's ten memories - yes ten not nine memories, eg 15 M+ 9M would add 15 to each of the ten memories. The PR100 also had an X <> M function. This would exchange the number on the screen or the X register with one of the ten memories chosen by the user. The undocumented feature was that if you combined X <> M with the 9M function it would move the number on the screen (X register) into the contents of memory 0 , memory 0 into memory 1 , memory 1 into memory 2 etc until memory 8 moved into memory 9 and memory 9's contents were displayed onto the Screen. Oh the memories ....... Nigel

Re: Commodore PR 100 Message #2 Posted by Thomas Radtke on 22 May 2010, 4:21 p.m., in response to message #1 by Nigel Bamber Commodore had a range of amazing calculators, especially the button monsters or the x190 series, which offered a broad range of interesting functions. My 4190 is never out of reach at home, and I also like the PR100 very much. Still waiting for a good offer on a 9190 :-).

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