I plugged in a working Microsoft Intellimouse and rebooted the GraphicsMaster.
The serial debug output indicates: PS2 Mouse Detected:
The mouse buttons appear to be working, however, there is no visible cursor for it which makes it quite difficult to work with.
I went into Control Panel -> Mouse Properties but there appears to be nothing about the mouse cursor. I looked at the rest of the settings and don't find it there, either.