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:
Feb. 21, 1995
Filed:
Oct. 26, 1993
Gary L Brasher, Houston, TX (US);
James H Nuckols, Houston, TX (US);
Jeffrey S Watters, Houston, TX (US);
Compaq Computer Corporation, Houston, TX (US);
Abstract
A data field having a variable number of zero-level bits is read by a bus in a digital system, wherein the bus is pumped by writing all logical 'one' bits onto the bus lines just before they are read. The unused bits will then be still in a logical 'one' state, i.e. a known value, rather than floating or at an indeterminate value. A program for performing this operation in a computer uses steps to prevent other operations such as refresh cycles or interrupts from being interposed between the write and read cycles. A CPU may use this method to read a system identifier value upon boot-up, for example.