WP 34S --> WP 31S
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04-03-2014, 09:34 AM
(This post was last modified: 04-03-2014 11:08 AM by walter b.)
Post: #238
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RE: WP 34S --> WP 31S
That's what I've written in the manual about UNDO:
If you have erroneously called a wrong command, just press UNDO to undo it. This command will restore the stack and all other registers exactly as they were before the last command was executed. Now we only have to talk about what is a command and what's not. The usual monadic, dyadic, etc. functions are easy. A plain numeric entry (pressing some digits, even including radix marks and EEX) isn't a command IMHO. Addenda: What about <- ? Shall be no command unless executed as CLx. Sigma+ ? Shall be reversible by UNDO though there's no pressing need since Sigma- exists. ENTER, FILL, CLALL, RESET ? Shall be commands. d:-) |
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