INT E0 - REAL/32 - "P_TERM" - TERMINATE CALLING PROCESS

	CL = 8Fh
	DX = termination code
Return: never if successful
	AX = FFFFh on failure
Note:	this function can not terminate processes whose KEEP flag is set
	if the termination code is FFh, this function can terminate the process
	  even if its SYSTEM flag is on; otherwise, only user processes can
	  terminate themselves
SeeAlso: INT E0/CL=90h,INT 21/AH=4Ch