Method of using stream buffer to perform operation under normal

Excavating

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

395444, 371 211, 364971, 3649575, 3649645, 364969, G06F 1216, G06F 1318

Patent

active

054524180

ABSTRACT:
The operation of a stream buffer varies depending on whether a normal operation mode or a test mode is selected. In the normal operation mode, the stream buffer is read from only when the data requested by a CPU read has been determined to reside there, and the stream buffer location read from is the location determined to contain the requested data. This determination is made by comparing the address of the read request with addresses of the data stored in the stream buffer. Also, the stream buffer is written with memory data in response to a read that misses the stream buffer, and the location written to is one that has been allocated to receive the incoming memory data. Two different buffer allocation methods are shown, first-in-first-out (FIFO) and least-recently-used (LRU). During the test operation mode, the stream buffer is written to and read from directly by the CPU at locations specified in the write and read requests, without regard to the data presence determination and the allocation that take place in the normal operation mode. The method provides a straightforward way of testing the stream buffer during system operation by bypassing some normal functions during test mode in favor of direct stream buffer access by the CPU.

REFERENCES:
patent: 4292674 (1981-09-01), Scheuneman
patent: 4601034 (1986-07-01), Sridhar
patent: 4621320 (1986-11-01), Holste
patent: 4761731 (1988-08-01), Webb
patent: 4835738 (1989-05-01), Niehaus et al.
patent: 4951254 (1990-08-01), Ontrop et al.
patent: 5003471 (1991-03-01), Gibson
patent: 5133062 (1992-07-01), Joshi et al.
patent: 5146578 (1992-09-01), Zangenehpour
patent: 5241503 (1993-08-01), Cheng
patent: 5261066 (1993-11-01), Jouppi
patent: 5289584 (1994-02-01), Thome et al.
patent: 5301278 (1994-04-01), Bowater et al.
patent: 5337318 (1994-08-01), Tsukakoshi et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method of using stream buffer to perform operation under normal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of using stream buffer to perform operation under normal , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of using stream buffer to perform operation under normal will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1835336

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.