The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 1995
Filed:
May. 18, 1992
Dipankar Bhattacharya, Santa Clara, CA (US);
OPTi, Inc., Santa Clara, CA (US);
Abstract
According to the invention, roughly described, the EISA arbitration scheme is used for arbitrating among a plurality of requestors for a system bus, the requestors including the CPU, a refresh controller, EISA devices and ISA/DMA devices. A refresh control signal is asserted if the refresh controller wins the arbitration, and a CAS# before RAS# refresh is performed on local memory in response to the refresh control signal after completion of any CPU access to local memory then taking place. The CPU can continue to access external cache during system bus refresh, and a CPU access to local DRAM is delayed only by the amount of time required for the shorter local DRAM refresh to complete.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile