INT 21 - VIRUS - "Hitchcock", "Dark Avenger-1028", "1193" - INSTALLATION CHECK AX = 4BFEh Return: AX = 1234h if "Hitchcock" resident AX = ABCDh if "1193"/"Copyright" resident DI = 55BBh if "Dark Avenger-1028" resident SeeAlso: AX=4BFFh"Justice"