Starting the debug monitor
If the Kernel or a system process panics, or if there is an unhandled processor exception, the Kernel beeps 4 times and enters the debug monitor.
To use the debug monitor:
Plug the mains adaptor into the DC jack.
Connect the machine serial port to your PC and set the PC serial port to 115200 baud, 8 bits, no parity, 1 stop bit, XON/XOFF flow control.
Press the ON key on the machine.
Start a terminal program on the PC (e.g. HyperTerminal.)
Press RETURN on the PC. The machine should reply
Password:
Enter the password "replacement" (all lower case, without the quotes). The machine should now reply
*** DEBUG MONITOR ***
You are now ready to use the debug monitor.