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:
Nov. 13, 1990
Filed:
May. 10, 1988
Colin H Cramm, Toronto, Ontario, CA;
Control Data Corporation, Minneapolis, MN (US);
Abstract
It is known to use a miss information holding register in a cache memory organization to store the details of a CPU load request on a cache miss so that the cache may accept subsequent requests pending the receipt of data in respect of the first request. In the subject invention, this organization is modified for use with a virtual addressable cache memory by incrementing a counter which overflows to free the miss information holding register with each untranslatable response signal from the address translation unit relating to the request stored in the miss information holding register. The modified organization also clears the used bit associated with the location in the cache tag memory to which the tag addresses of the request has been stored upon receipt of the first untranslatable response signal from the address translation unit in respect of the request.