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Faster factor finder method for 42S
11-29-2019, 04:27 PM
Post: #9
RE: Faster factor finder method for 42S
(11-29-2019 02:04 PM)Joe Horn Wrote:  I remember how they were discovered, because it was quite thrilling. I used the 42S's built-in memory hex browser/editor (AKA "debugger") to find where programs were stored, then poked every possible hex value into program memory and exited to normal program mode to see what the corresponding commands were. That's how I created the 42S Hex Table (which also appears in that issue of HPX Exchange) and discovered the "hidden functions" lurking in there. What those functions do, and how to use them, was then a matter of trial and error, turbo-powered by a Jack in the Box cheeseburger. Big Grin

That's a clever way to do it! I wonder why they went undocumented/hidden, though. Has anybody ever found any grievous bugs in any of them?
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RE: Faster factor finder method for 42S - Dave Britten - 11-29-2019 04:27 PM

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