INFORMATION PROCESSOR AND INFORMATION PROCESSING METHOD

PROBLEM TO BE SOLVED: To allow other equipment to use a bus even before the termination of a command in the case of the command operable without occupying the bus like the case of the given command being initialization operation. SOLUTION: This information processor is provided with a command register 101 storing the command, and a status register 102 storing a value showing whether an ATA bus 20 is in a busy state or not. When the command is written in the command register 101, a status control part 104 sets the value of the status register 102 to the value showing the busy state. A command determining part 105 determines the kind of the command stored in the command register 101. When the kind of the command is a command executable without occupying the ATA bus 20, a command completion setting part 106 sets the value of the status register 102 to a value showing that the ATA bus 20 is not occupied. COPYRIGHT: (C)2007,JPO&INPIT