Multisystem network, and device and method for access to...

Details Multisystem network, and device and method for access to... Multisystem network, and device and method for access to...

2008-07-29

2008-07-29

Kim, Matt (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Shared memory area

Reexamination Certificate

active

07406570

ABSTRACT:
There are provided a multisystem network, and a device and method for access to a data storage unit in order to allow processors in a plurality of devices to access the data storage unit. The data storage unit has a data storage area divided in a first area for a first device and a second area for a second device. The first and second devices are connected to the data storage unit via a connection circuit. A first processor in the first device can access directly the data storage unit. The connection circuit has provided therein an emulation register corresponding to a register which stores a command or control data used for the first processor in the first device to access the data storage unit. A second processor in the second device accesses the data storage unit via the emulation register and with intervention of the first processor.

REFERENCES:
patent: 4152764 (1979-05-01), Connors et al.
patent: 5548340 (1996-08-01), Bertram
patent: 5579512 (1996-11-01), Goodrum et al.

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