INT 11 - RainbowFAX v1.3 - SFENGINE 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. - ???
	AH = 78h
	AL = subfunction
	    01h set ???
		BX = new state for ???
		    0000h ???
		    else ???
		Return: AX = 0001h
	    02h set ???
		BX = ???
		CX = ???
		Return: AX = 0001h
	    03h set ???
		BX = new state for ???
		    0000h ???
		    else ???
		Return: AX = 0001h
	    else
		Return: AX = FFFFh (invalid subfunction)
SeeAlso: AH=77h,AH=79h,AH=7Ah,AH=7Ch