Int 21 Fn 4BFF - Virus - "ussr-707", "justice", "europe 92" - Installati [v] AX = 4BFFh Return: BL = FFh if "USSR-707" resident DI = 55AAh if "Justice" resident CF clear if "Europe 92" resident See Also: AX=4BFEh,AX=4BFFh"Cascade",AX=5252h