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

   AX = C300h
   BX = 4F53h ('OS')
   CX = 4F48h ('OH')
   DX = program identifier (see #2719) or 0666h for any SpaceManager prog

Return: AL = FFh if BX/CX as specified and specified program installed
       BX = 6F73h ('os')
       CX = 6F68h ('oh')
Range: AH=C3h to AH=FFh, selected by scanning for first free multiplex number

Note:  this call is chained if BX,CX, or DX are not as specified above

See Also: AX=C300h/DX=0000h

(Table 2719)
Values for SpaceManager program identifier:
 9000h SMOUNT (SuperMount)
 9001h SELECTC (SelectCompress)
 9002h SUPERX (SuperExchange)
 9003h FORTUNE (FortuneTeller)