Int 13 Fn 3C  U - Quickcache Ii V4.20 - Enable/disable ???                 [c]

   AH = 3Ch
   AL = new state of ??? (01h enabled, else disabled)

Return: AX = status (0000h successful)

Note:  is affected by the flag reported at offset 05h of the system info
     returned by AH=30h, and sets the flag at offset 07h

See Also: AH=3Bh