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

INT 15h,  84h (132)      Joystick Support                                many

    Reads the current joystick switch settings or reports the current
    joystick resistive inputs.

       On entry:      AH         84h
                      DX         Subservice
                                 00h - Read current switch settings
                                 01h - Read resistive inputs

       Returns:       Carry      Set if error, else cleared
                      If DX = 00h (Read current switch settings):
                                 AL     Bits 7 to 4 contain switch settings
                      If DX = 01h (Read resistive inputs):
                                 AX     A(x) value
                                 BX     A(y) value
                                 CX     B(x) value
                                 DX     B(y) value

  --------------------------------------------------------------------------

       Notes:         This service is available only for the AT, XT dated
                      after 11/08/82, and XT-286.