Click above to get retro games delivered to your door ever month!

        Return button press data

        Entry:
          AX = 0005h
          BX = button
              0 left
              1 right
              2 middle (Mouse Systems mouse)

        Return:
          AX = button states
               bit 0 left button pressed if 1
               bit 1 right button pressed if 1
               bit 2 middle button pressed if 1 (Mouse Systems mouse)
          BX = number of times specified button has been pressed since last call
          CX = column at time specified button was last pressed
          DX = row at time specified button was last pressed