Masking commands for a second processor when a first processor r

Details Masking commands for a second processor when a first processor r Masking commands for a second processor when a first processor r

1984-10-24

1987-12-15

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 1332

Patent

active

047137517

ABSTRACT:
A masking circuit for a multiprocessor system is disclosed. The masking circuit senses the existence and type of commands stored in the command status registers associated with the system processors. Masking begins if it is determined that information needed by one processor is located in the cache memory of another processor and is to be flushed to the main memory, which is accessible by the first processor. The masking circuit masks the command present in the command status register associated with the first processor, for the first processor to access the main memory, until after the information has been flushed from the cache to the main memory. The first processor is thus prevented from accessing the main memory until after the information has been flushed thereto.

REFERENCES:
patent: 4268904 (1981-05-01), Suzuki
patent: 4275440 (1981-06-01), Adams, Jr.
patent: 4394730 (1983-07-01), Suzuki et al.
patent: 4400773 (1983-08-01), Brown
patent: 4494193 (1985-01-01), Brahm

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