Int 2F Fn 4800  - Pced V2.1 - Installation Check                           [K]

   AX = 4800h

Return: AX = AACDh if installed
       ES = segment of PCED kernel (PCED has multiple code segments)
Program: PCED v2.1 is a command line editor/history/macro facility by
     Cove Software.  It is the commercial version of the freeware CED.

Notes: DOSKEY also responds to this call if installed, returning AX=AA02h.
   unlike DOSKEY, PCED does *not* chain if AL contains an
     unsupported function code.  It IRETs with all registers intact.