Int 13 Fn 37  U - Quickcache Ii V4.20 - Set Buffered Reads For Specific D  [c]

   AH = 37h
   AL = new state (00h disabled, else enabled)
   DL = drive number (00h = A:)

Return: AX = status (0000h successful)

See Also: AH=2Dh,AH=38h