Int 2F Fn DD  - Cappacom Programs - API                                    [t]

   AH = DDh
   AL = 00h general installation check

       Return: AL = FFh if any CappaCom programs are resident
   AL = FEh get info

       Return: ES:BX -> TSR info list (see below)
   AL = program identifier
       BH = function
       FDh get version

           Return: BX = version
       FFh installation check

           Return: AL = FFh if installed
               BX = version
               ES = segment of resident code
       others vary by program

Return: AL = status
       bit 7 set on error
       AL = 81h unknown function

Note:  CappaCom was originally SoftCom but changed its name due to a trademark
     conflict
Index: installation check;SoftCom programs
Index: installation check;CappaCom programs

Format of TSR info list:
Offset Size    Description
 00h  9 BYTEs  blank-padded ASCIZ program name
 09h   BYTE    program ID
 0Ah   WORD    program's PSP segment
 0Ch   WORD    program version (major in high byte)
 0Eh   DWORD   pointer to next item in info list or 0000h:0000h
 12h   BYTE    number of interrupts hooked
 13h  5 BYTEs  interrupt numbers hooked by program
 18h  8 BYTEs  reserved