Synchronous signal producing circuit for controlling a data...

Details Synchronous signal producing circuit for controlling a data... Synchronous signal producing circuit for controlling a data...

2005-08-09

2005-08-09

Verbrugge, Kevin (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Shared memory area

C711S149000, C711S152000, C709S213000, C712S034000

Reexamination Certificate

active

06928523

ABSTRACT:
A synchronous signal producing circuit includes an access inhibit region register for designating an access inhibit region for a processor in a shared memory, a comparing circuit for detecting the access by the processor to the access inhibit region designated in the access inhibit region register, and a logic circuit for issuing a P_DC signal setting the processor to a wait state based on a coprocessor instruction execution signal and a result of the comparison by the comparing circuit.

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patent: 5550988 (1996-08-01), Sarangdhar et al.
patent: 6006319 (1999-12-01), Takahashi et al.
patent: 6434689 (2002-08-01), Fleck et al.
patent: 6473821 (2002-10-01), Altmayer et al.
patent: 6557084 (2003-04-01), Freerksen et al.
patent: 05-197551 (1993-08-01), None

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