INT 9D - VIRUS - "INT13" - ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. INT 13h ENTRY POINT Note: this vector is used by the virusA program which attaches itself to other programs for the purpose of duplicating itself. Viruses often (but not always) contain harmful code which is triggered by some event, after a certain number of reproductions, or on a specific date. See also worm. to store the result of a call to INT 2F/AH=13h SeeAlso: INT 2F/AH=13h,INT 9C"VIRUS",INT 9E"VIRUS",INT 9F"VIRUS"