INT 2F R - InterWave Game 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. - INSTALLATION CHECK
	AX = CD00h
	DX = 4957h ('IW')
	SI = 5645h ('VE')
Return: AL = FFh if installed
	    DX = 4554h ('ET')
	    SI = 454Bh ('EK')
Range:	AH=CDh-ECh, selected by scanning for an available multiplex number
SeeAlso: AX=CD00h/BX=464Fh,AX=CD01h"InterWave",AX=CD21h"InterWave"
SeeAlso: AX=CD80h"InterWave"