Int 21 Fn FF04  - Topware Network Os V5.10+ - Get/set Default File Protec  [N]

   AX = FF04h
   CL = function
       00h get protections

       Return: BH = read attribute
           BL = write attribute
       01h set protections
       BH = read attribute
       BL = write attribute

Note:  this function is supported only on Workstations, not on the server

See Also: AX=FF00h"TopWare"