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