Various debugging commands:
DEBUG DUMPVAR <varname>
Prints the value of the specified variable. All array values are dumped.
DEBUG TRACEON
Dumps all source lines as they are executed.
DEBUG TRACEOFF
Switches Off the above.
DEBUG BAS9KON
Switches ON internal debugging output.
DEBUG BAS9KOFF
Switches OFF the above.
DEBUG WORDS
Prints a list of reserved words. Brackets indicates keyboard
shortcuts ie type CTRL+L for LOAD.