HP-41CX w/ XF-Module - just curious
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07-26-2019, 01:07 PM
Post: #18
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RE: HP-41CX w/ XF-Module - just curious
(07-26-2019 04:36 AM)Ángel Martin Wrote: The BUS search order is dictated by the mainframe MCODE. It always starts at page 5, moving up until page F. When the CX was released HP added a new page at the END of the search, page #3 - that's why 3 in the CAT 2 is shows the last. Thanks very much Angel for the explanation. Like so many things, it makes perfect sense once someone has explained it to you! I did not consider that the XROM search halts when reaching the end of the first ROM with matching XROM number, but as you say it makes sense, since one is not supposed to install more than 1 ROM module at a time with the same XROM # (as in all the "X" modules HP released). And I suppose HP added Page-3 at the end of the existing C/CV CAT-2 search, as it was simply easier to just add this onto the end of the existing code. I have always wondered why the CX shows XFM and CX XFM at the end of the CAT-2 listing. Thanks for clearing up these mysteries! My view is slightly different than yours - It's all in Angel's head! --Bob Prosperi |
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