Davex/doc/help/SetStart

setstart -- examine or set a SYS file's startup path

syntax:  setstart <pathname> [-s <string>]

ex:      setstart /disk1/basic.system
         setstart my.program -s /disk1/foo.bar

Displays or changes the default startup pathname of the
specified SYS file.  Wildcards are allowed.

If the -s parameter is given, the default startup path is
changed to the string you specify.

Example:
        setstart basic.system

would print

        Startup path is "startup"

on an unmodified copy of BASIC.SYSTEM, because STARTUP is
the file BASIC.SYSTEM tries to run when you don't specify
another path.

To make BASIC.SYSTEM run a different file by default, use

         setstart basic.system -s your.prog.name

Possible errors (in addition to ProDOS errors):
  *** not a SYS file
  *** SYS file does not have a startup buffer
  *** path too long for the startup buffer