Int 21 Fn FF  - Ced (command Editor) - Installable Commands                [K]

   AH = FFh
   AL = subfunction
       00h add installable command
          BL = mode - bit 0 = 1 callable from DOS prompt
              bit 1 = 1 callable from application
          DS:SI -> CR-terminated command name
          ES:DI -> FAR routine entry point
       01h remove installable command
          DS:SI -> CR-terminated command name
       02h reserved, may be used to test for CED installation

Return: CF clear if successful
   CF set on error
       AX = 01h invalid function
        02h command not found (subfunction 01h only)
        08h insufficient memory (subfunction 00h only)
        0Eh bad data (subfunction 00h only)
   AH = FFh if CED not installed
Program: CED is a shareware DOS command-line enhancer by Christopher J. Dunford

See Also: AX=0A00h