Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Patent
1997-10-31
2000-02-29
Peikari, B. James
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
711170, 711221, G06F 1202
Patent
active
060322349
ABSTRACT:
In a multiprocessor system where a shared expansion memory and a number of loosely coupled clusters are provided, each cluster comprises at least one CPU and a main memory connected to a system bus, and an address memory. During system initialization, a configuration table is created in the main memory, and an expansion memory location is accessed and status of the access is received. If the access status indicates that the access is successful, the address of the memory location is written into the address memory. Otherwise, an inaccessibility indication is stored in the configuration table to prevent the operating system from accessing that expansion memory location. During read/write operation, when an address of the expansion memory is received from the system bus, the address memory is searched for an address corresponding to the received address. If the received address has a corresponding address in the address memeory, data is tranferred between the expansion memory and the system bus. If an error is detected when accessing an expansion memory locatio during the read/write operation, the address of that location is removed from the address memory and the system is restarted for initialization.
REFERENCES:
patent: 3970999 (1976-07-01), Elward
patent: 4280176 (1981-07-01), Tan
patent: 4430727 (1984-02-01), Moore et al.
patent: 4980850 (1990-12-01), Morgan
patent: 5175836 (1992-12-01), Morgan
patent: 5235687 (1993-08-01), Bacot et al.
patent: 5459854 (1995-10-01), Sherer et al.
patent: 5485590 (1996-01-01), Hyatt et al.
patent: 5577221 (1996-11-01), Liu et al.
patent: 5704055 (1997-12-01), George et al.
"PX 7800 Central processing Unit", NEC Technical Report, vol. 48, No. 9, 1995, pp. 28-36.
NEC Corporation
Peikari B. James
LandOfFree
Clustered multiprocessor system having main memory mapping share does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Clustered multiprocessor system having main memory mapping share, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clustered multiprocessor system having main memory mapping share will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-692958