Int 2F Fn 48C4  - PCed/flist - Installation Check                          [-]

   AX = 48C4h
   BL = 00h

Return: AX = 0000h if installed
       BX = FLIST resident segment
Program: FLIST is a resident filelist processor included as part of the PCED
     package

Note:  chains if BL <> 00h on entry

See Also: AX=48C0h,AX=48C3h,AX=48C5h