Int 2F Fn C300  U - Spacemanager - Installation Check                      [k]

   AX = C300h
   DX = 0000h

Return: AL = FFh if any SpaceManager programs installed
       BX = 6F73h
       CX = 6F68h
Program: SpaceManager is an enhancement for MS-DOS DoubleSpace by Vertisoft
     Systems, Inc.
Range: AH=C3h to AH=FFh, selected by scanning for first free multiplex number

See Also: AX=C300h/BX=4F53h