Row6.Bit0 Joy2up LOW when mouse wheel turned towards user
Row6.Bit1 Joy2down LOW when mouse wheel turned towards screen
* Note: The above "1/300s" timing would be the ideal value (the existing [[AMX Mouse]] software reads the joystick port inputs at 300HZ rate). The real [[AMX Mouse]] interface, and this DIY project may not exactly match that timings.
