HP 42S: Difference between revisions

1 byte added ,  14:17, 2 February 2022
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== Tricks ==
== Tricks ==
<nowiki>*</nowiki>note: the top row of keys is customarily labeled A-F from left to right.
<nowiki>*</nowiki>note: the top row of keys are customarily labeled A-F from left to right.


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.
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.
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