HP35s RPN Series #1 Stack

[Voldemar]

I wrote a little programm. It is important to place my programm at the top of programms.
PRGM TOP
X001 LBL X
X002 CLSTK
X003 RTN
If programm point in my calculator is on programm top (99 percent of the cases), I can press R/S button (one keystroke) and all stacks are clear. If programm point in my calculator is not on programm top, R/S button pressing launches another programm, but this is rare.