Int 13 Fn F9  - Swbios - Installation Check                                [d]

   AH = F9h
   DL = drive number (80h,81h)

Return: CF clear
       DX = configuration word
       bit 15 set if other SWBIOS extensions available
   CF set on error
Program: SWBIOS is a TSR by Ontrack Computer Systems

Note:  Disk Manager also supports these calls

See Also: AH=EEh
Index: Disk Manager