Category: disk I/O enhancements
Flags: Undocumented function
INT 13 - HARD DISK - PS/1 and newer PS/2 - SET CONTROLLER FEATURES REGISTER AH = 23h AL = feature number (see #00266) DL = drive number (80h,81h) ??? Return: CF clear if successful CF set on error AH = status (see #00234 at AH=01h) SeeAlso: AH=21h"PS/1",AH=22h"PS/1",AH=24h"PS/1",AH=25h"PS/1"