Method and apparatus for reducing buffer storage in a read-modif

Details Method and apparatus for reducing buffer storage in a read-modif Method and apparatus for reducing buffer storage in a read-modif

1990-09-14

1993-08-10

Dixon, Joseph L.

Boots, shoes, and leggings

364DIG1, G06F 1314

Patent

active

052356930

ABSTRACT:
A method and apparatus for a read-modify-write operation in a digital computer memory system that reduces memory data path buffer storage requirements. The method latches new write data and associated mask fields into a data output buffer and then uses the latched mask fields to merge read data with the new data in the output buffer. The mask fields determine which portion of the read data is to be replaced with new data. Appropriate check bits for an error correction code (ECC) are generated and added to the modified data in the output buffer to produce a new data output which is released from the output buffer into the memory at the selected address.

REFERENCES:
patent: 4648029 (1987-03-01), Cooper et al.
patent: 4797853 (1989-01-01), Savage et al.
patent: 4888773 (1989-12-01), Arlington et al.
patent: 5003465 (1991-03-01), Chisholm et al.
patent: 5014187 (1991-05-01), Debize et al.

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