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15C functions that can be cancelled with 'null' (quiz)
10-14-2024, 12:08 PM (This post was last modified: 10-14-2024 12:26 PM by J-F Garnier.)
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J-F Garnier Offline
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15C functions that can be cancelled with 'null' (quiz)
In his presentation at the HHC 2024 meeting, Bob talked about the HP-15C operations that can be cancelled (in run mode) by holding the key down.
Examples from the 15c manual (p.144): "STO A" or "RCL A" , A being a dimensioned matrix.

Bob stated that there are 3 operations. I guess the third operation he had in mind was " x<> ".
A more complete investigation gave me 10 "generic operations" (the first key of a sequence) that can be cancelled with a 'null' display, such as the STO, RCL and x<> operations on a matrix.

All in all I counted 83 key sequences that possibly can be nulled out by holding down the last key.
In this context, a key sequence is what would generate one step in program mode, such as " STO + . 6 ".

Can you find the 10 generic operations and the 83 key sequences ?
Or more, in case I missed a few...

J-F
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15C functions that can be cancelled with 'null' (quiz) - J-F Garnier - 10-14-2024 12:08 PM



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