Int 2F Fn AF01  - Windos V2.11 - Turn On Online Mode                       [O]

   AX = AF01h

Return: nothing
Desc:  indicate that the user will not exchange floppy disks, allowing WinDOS
     to cache disk sectors in memory and avoid writing modified sectors
     back out to the floppy disk

See Also: AX=AF00h"WinDOS",AX=AF02h"WinDOS"