INT 62 u - FGDRIVER v3.03 - "FG_INTJOY" - GET KEYCODES CORRESP TO JOYSTICK POS
        AX = 0050h
        CX = joystick number (0001h or 0002h)
        ES:BX -> variable pointer record (see below)
Notes:  For FGDRIVER v1.10, this function was "FG_PATTERN" (see AX=0072h);
          "FG_INTJOY" was AX=0079h
        If the indicated joystick has not been initialized with AX=0075h, both
          the button code and joystick position will be set to 00h
        If either button is pressed, a button code of 0Dh is returned;
          otherwise, a button code of 00h is returned
SeeAlso: AX=0009h,AX=0044h,AX=0046h,AX=004Dh,AX=0061h

Format of variable pointer record:
Offset  Size    Description
 00h    WORD    segment of BYTE buffer for button code
 02h    WORD    offset of BYTE buffer for button code
 04h    WORD    segment of BYTE buffer for joystick position
 06h    WORD    offset of BYTE buffer for joystick position

.