Int 16 Fn 09  - Keyboard - Get Keyboard Functionality                      [B]

   AH = 09h

Return: AL = supported keyboard functions (see #0509)
   AH destroyed by many BIOSes

Note:  this function is only available if bit 6 of the second feature byte
     returned by INT 15/AH=C0h is set (see #0433)

See Also: AH=03h,AH=0Ah,AH=10h,AH=11h,AH=12h,AH=20h,AH=21h,AH=22h,INT 15/AH=C0h

Bitfields for supported keyboard functions:
Bit(s) Description (Table 0509)
 7 reserved
 6 INT 16/AH=20h-22h supported (122-key keyboard support)
 5 INT 16/AH=10h-12h supported (enhanced keyboard support)
 4 INT 16/AH=0Ah supported
 3 INT 16/AX=0306h supported
 2 INT 16/AX=0305h supported
 1 INT 16/AX=0304h supported
 0 INT 16/AX=0300h supported

See Also: #0435