OPTION BREAK nn
Set the value of the break key to ‘nn’. This key is used to interrupt a running program.
The value of the break key is set to Ctrl-C key at start up but it can be set to any keyboard key using this command (for example, OPTION BREAK 156 will set the break key to the F12 key). Setting this option to an invalid key value (for example, 255) will disable the break function entirely.