HP HP-16C - Section 6: Memory and Storage; Alteration of Register Contents

Section 6: Memory and Storage 65
will leave 94Y registers, only the whole 94 (R, to Ros,, or Rsp ) of
which remain available for actual use as data storage registers.
(The remaining half register will be used in the next conversion to
program memory.)
Viewing the Status of Memory Allocation ([MEM])
A temporary display of the current allocation of memory results
when you press [f][MEM]. (Hold [MEM] to prolong the display.) The
information in the display will be
P—-B r—RRR
B is the number of bytes (program lines) which may be added
to program memory before another seven bytes are allocated
(diminishing available storage register space by seven
bytes). 0 < B<6.
RRR is the total number of storage registers currently available
for data storage. 0 < RRR < 406, with RRR always given in
base 10. (Note the smallest possible register size is four bits,
yielding a maximum number of 406 registers.)
In the situation diagrammed on the preceding page—initial
memory configuration, word size 16—the [MEM] function would
show the following information:
Keystrokes Display
[ON]/[-] 0 h Continuous Memory
reset; word size defaults
to 16 and program
memory is cleared.
(f](MEM] (hold) P-0 r-101 Zero lines to go before
(release) 0 h seven bytes will be
converted to program
memory. 101 storage
registers available.
(g](P/R] 000- Sets calculator to Pro-
gram mode; line 000.
1 001- 1 Records one program
line.