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:
May. 07, 1991
Filed:
Jan. 29, 1988
James S Pogorzelski, Georgetown, TX (US);
Craig H Shempert, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An I/O bus expansion interface is disclosed which enables an I/O device having an n-bit data bus to be interfaced to an m times n-bit I/O data bus of a host processor. This I/O bus expansion circuit maximizes the computer processor's performance by providing full I/O data bus bandwidth and allowing overlap of processor execution and I/O bus expansion interface circuit operation. This is accomplished by: (1) prefetching multiple control and/or data fields from the I/O device and presenting that information to the host without delay and (2) burst writing multiple fields from the host to the bus expansion interface circuit, without delay of the host, and thereafter making these fields individually available to the I/O device.