Fujitsu Corporation

Hisayuki Nishimura

Shigeru Hashimoto

Yoshiyasu Sugimura

Yasuyuki Higashiura

Akiko Ono

Naohiro Shibata

Shigeru Honda

Tomochika Shibata

The present invention has an object of providing a recording medium control method, a data management apparatus, and a recording medium for managing data by duplicating the data in each of a plurality of recording media. Two IC cards are loaded into a data management apparatus. In duplicating data in the two loaded IC cards, the two IC cards store their card characteristic numbers for self-identification and the card characteristic number of each other's pair IC card. If the card characteristic number of the pair IC card stored in one IC card matches the card characteristic number of the other IC card, the two IC cards are controllable.

Recording medium control method, data management apparatus, and recording medium

The present invention relates to a circuit mounting unit that can prevent a voltage drop and noise occurrence due to current inflow at the time of a hot insertion or withdrawal operation without mounting a capacitor with large capacitance on the side of a main unit. The circuit mounting unit includes a first voltage control unit that controls to increase gradually a voltage supplied to a load voltage converter from the main unit side to a predetermined voltage when the circuit mounting unit is exchangeably inserted into or pulled out of the main unit without halting electric power supplied from the main unit. The circuit mounting unit is mounted onto a printed wiring board on which various elements such as ICs and LSIs are previously mounted to form a predetermined circuit.

Circuit mounting unit

An interrupt control system in which a main process device executes an interrupt process, having a high process priority. The process priority is registered in a table, corresponding to each interrupt generating source, and an intermediate process device receives an interrupt signal from each interrupt generating source, obtains the corresponding process priority from the table and informs the main process device of the interruption. Accordingly, the process priority can be easily changed, and the system has a small size because the interrupt circuit for the main process device is centralized.

Interrupt control system

Address extension system

Growing community of inventors

Kawasaki, Japan

Hisayuki Nishimura