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Memory Status (
To view the current memory configuration of the calculator, press |
W (memory), holding W to retain the display.
four numbers,
where:
dd = the number of the highest-numbered register in the data storage
pool (making the total number of data registers dd + 2 because of R
and R
);
I
uu = the number of uncommitted registers in the common pool;
pp = the number of registers containing program instructions; and
b = the number of bytes left before uu is decremented (to supply seven
more bytes of program memory) and pp is incremented.
The initial status of the HP-15C at power-up is:
The movable boundary between the data storage and common pools is
always between R
Memory Reallocation
There are 67 registers in memory, worth seven bytes each. Sixty-four of
these registers (R
common pools.
The
m %
If you should require more common space (as for programming) or more
data storage space (but not both simultaneously!), you can make the
necessary register reallocation using m %.
*
MEM is nonprogrammable.
†
m (dimension) is so called because it is also used (with A through E or V) to dimension
matrices. Above, however, it is used (with %) to ―dimension‖ the size of the data storage pool.
Appendix C: Memory Allocation
)
W
dd
19
46
and R
.
dd
dd + 1
to R
) are interconvertible between the data storage and
2
65
Function
uu pp-b
0-0
†
The procedure is:
215
*
The display will be
0
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