BUS BRIDGE DEVICE AND DATA TRANSFER CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To give interruption control of built-in storage equipment which has been bridged without reducing a data transfer rate in a bus bridge device. SOLUTION: The bus bridge device 10A is equipped with a first transfer control part 13 to communicate with host equipment 31 on the side of an IEEE 1394; a second transfer control unit 14 to communicate with the built-in storage equipment 32 on the side of an IDE; a storage part 15 to store data read out from the built-in storage equipment 32; a look-ahead control unit 16 for predicting a command issued by host equipment 31 and giving a prediction command to the second transfer control unit 14; and a CPU 17 for giving the interruption control of the built-in storage equipment 32. When the command predicted by the look-ahead control unit 16 coincides with the command actually issued, the look-ahead data stored in the storage part 15 are transferred to the host equipment 31. During this period, the CPU 17 gives the interruption control of the equipment 32 by way of the second transfer control unit 14. COPYRIGHT: (C)2005,JPO&NCIPI