The BASIC symbolic debugger facilitates the debugging of
new BASIC programs and the maintenance of existing BASIC programs.
The BASIC debugger requires sys2 privileges and has these general
- Step through execution of programs in single or multiple steps.
- Transfer to a specified line number.
- Break execution at specified line numbers or when specified logical conditions have been
- Display and/or change any variables, including dimensioned variables.
- Trace variables.
- Enter the system debugger.
- Direct output to either the terminal or the printer.
- Display and/or pop the gosub stack.
- Display source code lines.
The BASIC debugger can be entered at execution time when:
- BREAK key is pressed.
- d (debug) option is specified with the TCL run command.
- debug statement is executed in the program.
- Runtime error is encountered (unless the a (abort) option of the TCL
run command is selected).
- abort statement is executed in the program.
When the BASIC debugger is entered, it indicates the source
code line number to be executed next and prompts for commands with
an * asterisk.