HP-25 Subroutines possible?

[Dieter]

(06-25-2017 02:42 AM)teenix Wrote:  This simple method is not practical, but it does create a "subroutine" which adds 1 to memory 2 (3 times).

This illustrates nicely the second point in my previous post: "Doing this without subroutines is quite cumbersome and requires some tricks – as well as additional memory for implementing these instead of a simple subroutine call."

Compare that 23 step version with a simple subroutine solution:

Code:

01 CLX
02 STO 2
03 GSB 08
04 GSB 08
05 GSB 08
06 RCL 2
07 GTO 00
08 1
09 STO+2
10 RTN

Doing this without subroutines requires a substantial overhead that fills up valuable memory. With merely 49 steps this is much more relevant than on a calculator with less limited resources. So it's good to see that HP included subroutines on the 33E/C.

Dieter