To set up a custom Fn hotkey in MMBasic, use the following syntax:
OPTION F8 “RUN “+chr$(34)+”myprog” +chr$(34)+chr$(13)+chr$(10)
On my PicoCalc, I configured F6 to launch rgpapp’s Picocalc Commander (PCC) file manager by running the following command:
option F6 "RUN "+chr$(34)+"b:/pcc" +chr$(34)+chr$(13)+chr$(10)
If curious:
chr$(34) = Double Quotes
chr$(13) = Carriage Return
chr$(10) = Line Feed