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:
Mar. 26, 1991
Filed:
Jun. 30, 1988
Richard W Coyle, Dunstable, MA (US);
Zenja Chao, North Andover, MA (US);
Thomas B Berg, West Lafayette, IN (US);
Wang Laboratories, Inc., Lowell, MA (US);
Abstract
An information processing system comprises a high speed noninterlocked system bus 12 which couples together a plurality of system units including a main memory and a system bus interface (SBI) unit 34. The system bus interface unit is further coupled to an I/O bus 42 having a plurallity of I/O Processors 44, 46 coupled thereto. The system bus interface includes read and write buffer storage for buffering information units being transferred between the system bus and the I/O bus. The I/O bus includes two signal lines which differentiate the condition of an I/O bus SBI BUSY signal line. One of these two signal lines indicates when the SBI read buffer is full while the other signal line indicates when the SBI write buffer is full. The SBI Busy signal line indicates when either of these conditions exist. I/O processors are enabled to differentiate between read and write buffer full conditions, thereby effectively increasing the bandwidth of the I/O bus.