INT 21 - VIRUS - "USSR-707", "Justice", "Europe 92" - INSTALLATION CHECK

	AX = 4BFFh
Return: BL = FFh if "USSR-707" resident
	DI = 55AAh if "Justice" resident
	AX = 1234h if "Hitchcock.1238" resident
	CF clear if "Europe 92" resident
SeeAlso: AX=4BFEh,AX=4BFFh"Cascade",AX=5252h