Store queue including a byte order tracking mechanism for mainta

Details Store queue including a byte order tracking mechanism for mainta Store queue including a byte order tracking mechanism for mainta

1994-07-22

1997-01-07

Harvey, Jack B.

395308, 395849, 395853, 395821, 395309, G06F 1314, G06F 1338

Patent

active

055926843

ABSTRACT:
A store queue is provided that forms an interface between a primary bus and a secondary bus and which temporarily stores data to be written via a memory or I/O channel to a peripheral device. The store queue allows partial writes executed on the primary bus to be combined within a common word storage cell of an internal FIFO buffer regardless of whether the consecutive partial writes result in an invalid byte combination. If the data being transferred does not constitute an invalid byte combination, the store queue executes a single write cycle on the secondary bus. If the data contained by the word memory cell constitutes an invalid byte combination, the store queue executes two or more partial writes on the secondary bus to transfer the data in the order it was received. The store queue includes a byte order tracking circuit, such as an accumulation counter, for tracking the order in which the bytes are written from the primary bus. The store queue may further include a configuration register that stores a descriptor that identifies certain address regions as order-protected. If the data stored within a particular memory cell of the store queue corresponds to an address within the protective range, the store queue transfers the data on the secondary bus in the same order as it was received from the primary bus.

REFERENCES:
patent: 4285038 (1981-08-01), Suzuki et al.
patent: 4750154 (1988-06-01), Lefsky et al.
patent: 4935894 (1990-06-01), Ternes et al.
patent: 5034914 (1991-07-01), Osterlund
patent: 5131081 (1992-07-01), MacKenna et al.
patent: 5276849 (1994-01-01), Patel
patent: 5293381 (1994-03-01), Choy
patent: 5357622 (1994-10-01), Parks et al.
patent: 5359611 (1994-10-01), Parks et al.
patent: 5459842 (1995-10-01), Begun et al.

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