INT 2F - F-PROT v1.x only - F-POPUP.EXE - API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes.
	AX = 4653h ('FS')
	CX = 0004h
	BX = subfunction
	    0000h  installation check
		Return: AX = FFFFh
	    0001h  uninstall
		Return: AX,BX,ES destroyed
	    0002h  disable (v1.08 and below only)
		   display message (v1.14+)
			other registers: ???
	    0003h  enable (v1.08 and below only)
		   display message (v1.14+)
			other registers: ???
			Return: AX = key pressed by user
Program: F-POPUP is part of the shareware F-PROT virusA program which attaches itself to other programs for the purpose of duplicating itself.	Viruses often (but not always) contain harmful code which is triggered by some event, after a certain number of reproductions, or on a specific date.  See also worm./trojan protection
	  package by Fridrik Skulason
SeeAlso: AX=4653h/CX=0003h,AX=4653h/CX=0005h,AX=CA00h
Index:	installation check;F-POPUP|uninstall;F-POPUP