Int 21 Fn 87  - European MS-dos 4.0 - "getpid" - Get Process Identifier    [D]

   AH = 87h

Return: AX = PID
   BX = parent process's PID
   CX = Command Subgroup ID (CSID)
Program: European MS-DOS 4.0 was written for Siemens in Germany and then used
     by several other European OEMs; its release falls between mainstream
     versions 3.2 and 3.3
Desc:  determine an identifier by which to access the calling process

Notes: called by MS C v5.1 getpid() function
   this function apparently must return AX=0001h for INT 21/AH=80h to
     succeed
   one possible check for European MS-DOS 4.0 is to issue this call with
     AL=00h and check whether AL is nonzero on return

See Also: AH=30h,AH=62h,AH=80h
Index: installation check;European MS-DOS 4.0