21EC INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE FILE
21EC INT 21 - DoubleDOS - GET VIRTUAL SCREEN ADDRESS
21EC INT 21 - OS/286, OS/386 - BLOCK TRANSFER
21EC27 INT 21 - VIRUS - "Halloween.1839" - INSTALLATION CHECK
21EC59 INT 21 - VIRUS - "Terror" - INSTALLATION CHECK