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Appendix C: Stack Lift Conditions and Termination of Keyboard Entry 248
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Neutral Operations
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Neutral operations are those that do not alter the status of the stack lift, so
that whether or not the stack is lifted depends upon the previous operation.
Note that CHS and EEX
are neutral only during digit entry. When pressed any other time,
CHS and EEX enable the stack
lift. The neutral operations are:
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PRGM
ALPHA
ON
CHS
EEX
USER
g
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