Electrical computers and digital processing systems: interprogra – Interprogram communication using shared memory
Reexamination Certificate
2002-09-10
2008-05-20
Thomson, William (Department: 2194)
Electrical computers and digital processing systems: interprogra
Interprogram communication using shared memory
C710S007000, C710S036000, C710S051000, C358S001130, C358S001150
Reexamination Certificate
active
07376956
ABSTRACT:
A architecture for a multifunction peripheral to service a plurality of clients simultaneously. A shared memory receives data from the plurality of clients. A channel multiplexer selects data to be routed to a peripheral, a SCSI emulator is used to logically select the peripheral. The data is then forwarded from the multiplexer via the SCSI emulator to a PCI bus, the PCI bus being physically connected with the peripheral's engine. When data needs to be sent from a peripheral to a client, it is forwarded from the PCI bridge to the SCSI emulator and routed via a demultiplexer to the shared memory wherein it is retrieved by the appropriate client. The multifunction peripheral can be interrupted while performing a first task using a first peripheral, switch to a second task needing a second peripheral, and return to the first task when completed.
REFERENCES:
patent: 5548728 (1996-08-01), Danknick
patent: 5600804 (1997-02-01), Ip
patent: 6128689 (2000-10-01), Hassbjer et al.
patent: 6980319 (2005-12-01), Ohta
Hoang Phuong N
Thomson William
Toshiba Tec Kabushiki Kaisha
Tucker Ellis & West LLP
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