Appendix C: Memory Allocation 215
Memory Status (
W
)
To view the current memory configuration of the calculator, press
|
W
(
memory
), holding
W
to retain the display.
*
The display will be
four numbers,
dd uu pp-b
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
0
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:
19 46 0-0
The movable boundary between the data storage and common pools is
always between R
dd
and R
dd
+ 1
.
Memory Reallocation
There are 67 registers in memory, worth seven bytes each. Sixty-four of
these registers (R
2
to R
65
) are interconvertible between the data storage and
common pools.
The
m
%
Function
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
%
.
†
The procedure is:
*
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.
Summary of Contents for HP-15C
Page 1: ...HP 15C Owner s Handbook HP Part Number 00015 90001 Edition 2 4 Sep 2011 ...
Page 17: ...Part l HP 15C Fundamentals ...
Page 64: ......
Page 65: ...Part ll HP 15C Programming ...
Page 118: ...118 ...
