This does not seem to be possible as the Internal customer display takes over control of the DSR line holding it permanently high.

If there is no external wedge device or external keyboard connected, please make sure that the supplied jumper plug is connected into the PS/2 keyboard socket. Otherwise the internal MSR or the Laser scanner of ScanPOS will not work in Windows 2000/XP.

The serial ports can supply 5V and 12V at a maximum of 1 Amp.

The factory can guarantee that compatible spare parts (not same parts) will be still available for 5 years after Robot POS Plus production termination.

Yes, the USB sockets can be disabled in the BIOS.
REBOOT the machine and enter the BIOS by "DEL" during start-up.
Navigate to "Advanced Chipset Features" and select disable "OnChip USB".
Select "Save and Exit Setup" to save the changes, and reboot again.

Yes, the RobotPOS Plus range has the option of three internal plug-in modules for serial ports and digital cashdrawers.1.                   Option 1 - Four serial port version 2.                   Option 2 - Six serial port version 3.                   Option 3 - Four serial ports and two auto sensing (12V or 24V) cashdrawer ports.
        When deciding how many COM ports are required, bear in mind that COM1 is
       nomally reserved for the internal optional customer display (if required) but COM 1
       can also be used externally by changing jumpers internally. COM2 is used internally for the touch controller and is not available externally. COM3/4/5/6 are free and can be configured for 5V or 12V by changing jumpers on the serial port module.