INT 33 - MS MOUSE v1.0+ - RETURN BUTTON PRESS DATA
        AX = 0005h
        BX = button
            0000h left
            0001h right
            0002h middle (Mouse Systems/Logitech 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/Logitech 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
SeeAlso: AX=0006h,INT 62/AX=007Ch

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