BUS SYSTEM AND WRONG OPERATION PREVENTION DEVICE FOR BUS SYSTEM

摘要

PROBLEM TO BE SOLVED: To mask unauthorized access from a second vicarious operation means (PCI agent) so as to prevent wrong operation of a first vicarious operation means (host agent). SOLUTION: Unauthorized access from a PCI agent 2 is masked after or during execution of a system configuration cycle for a PCI agent 2 by a host agent 1 so as to prevent wrong operation of the host agent 1 by unauthorized access from the PCI agent 2.