Title: Cache write capacity

Abstract: An input/output system includes a local memory module including a cache store and a backing store. The system includes a plurality of command modules and a system interface unit having a plurality of ports, each connected to a different one of the command modules and to the local memory module. The cache store provides fast access to blocks of information previously fetched from the backing store in response to memory commands generated by any one of a plurality of command modules during both data transfer and data processing operations. The local memory module includes apparatus operative in response to each memory command to enable the command module to write into cache store the data which is requested to be written into backing store when it is established that such data has been previously stored in cache store.

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Inventors: Calle, Jaime (Glendale, AZ, US)
Chelberg, Lawrence W. (Phoenix, AZ, US)

Application Number: 769617
Filing Date: 1977-02-17
Publication_date: 1978-04-11
Assignee: Honeywell Information Systems Inc. (Waltham, MA)
Primary Class(es): 711/118 711/113
Other Classes:
US Patent Ref:

3588829	Jun, 1971	Boland et al.	364/200.
3588839	Jun, 1971	Belady et al.	364/200.
3806888	Apr, 1974	Brickman et al.	364/200.
3820078	Jun, 1974	Curley et al.	364/200.
3896419	Jul, 1975	Lange et al.	364/200.
3911401	Oct, 1975	Lee	364/200.

Other Refs:
Primary Examiner: Shaw, Gareth D.
Assistant Examiner: Heckler, Thomas M.
Attorney: Driscoll; Faith F., Prasinos; Nicholas, Reiling; Ronald T.