Syntax:
ADDRESS_R

Runs the program loaded at the 
specified memory address. Useful 
addresses:
6000R AppleSoft BASIC cold start 
(needed at least once).
6003R AppleSoft BASIC warm start 
(it does not destroy the BASIC program
in RAM).
E000R Integer BASIC cold start.
EFECR Integer BASIC "RUN" command (can 
be used as a warm entry point).
8000R SD card OS command prompt.
