The HP-10C Keyboard and
Continuous Memory
The basic program memory and storage register allocation is nine lines
of programming and 10 data storage registers. The calculator
automatically converts one data storage register into seven lines of
program memory, one register at a time, as you need them. Conversion
begins with R
9
and ends with R
0
, giving you a maximum of 79 program
lines. R
0
through R
5
are also used as statistics registers.