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.

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