Int 4A Fn 04  - Ti Professional Pc - Keyboard - Send Command To Keyboard   [b]

   AH = 04h
   AL = command
       00h reset to default states
       01h enable auto-repeat (default)
       02h disable auto-repeat
       03h lock keyboard
       04h unlock keyboard (default)
       05h enable keyclick (requires hardware modification to work)
       06h disable keyclick (default)

Return: nothing

See Also: AH=00h,AH=02h,AH=03h,AH=04h,AH=05h