HP 42S: Difference between revisions

HP 42S (edit)

300 bytes added , 14:14, 2 February 2022

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 == Tricks ==
-Master Reset: press Exit(On), Sigma+ and XEQ at the same time will reset the calculator to factory condition.
+<nowiki>*</nowiki>note: the top row of keys is customarily labeled A-F from left to right.
-Machine Reset: press Exit(On) and Sqrt at the same time will trigger a Machine Reset which does not clear memory but interrupts any programs and puts the calculator into a usable state.
+HP-42s has two resets: Master reset which puts the calculator back to "factory condition", clearing all memory with On+A+F and Machine reset with On+C which interrupts any program, clears certain flags and set the calculator into a state ready to receive user input again. As with as with 27S and 17B the self test is triggered with On+D. On the first screen of the self test routine hitting backspace (<-) will put the calculator in debugger. In this state the Up/Down keys, divide/multiply keys, plus/minus keys can be used to increment or decrement the current memory address by 1000,100 and 1 nybble(s) respectively.
-Debugger: press Exit(On) and LOG at the same time will put the calculator into a self test (as with 27S and 17B).