INT 16 - KEYBOARD - GET KEYBOARD FUNCTIONALITY AH = 09h Return: AL = supported keyboard functions (see #00585) 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 #00509) SeeAlso: AH=03h,AH=0Ah,AH=10h,AH=11h,AH=12h,AH=20h,AH=21h,AH=22h,INT 15/AH=C0h