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:
Jul. 12, 1988
Filed:
Apr. 01, 1986
Robert R Trottier, Lowell, MA (US);
David A Reeder, North Billerica, MA (US);
Wang Laboratories, Inc., Lowell, MA (US);
Abstract
A high speed link used to connect peer computer systems. The link includes data lines and control lines connected to a device adapter in the I/O system of each of the peer computer systems and logic in each device adapter. The data lines carry data words in parallel; the control lines include status lines indicating status of each of the peer systems, arbitration lines for indicating which of the peer systems currently desires to transmit data across the link and whether the link is available, and receiver acquisition lines for specifying which of the peer systems is to receive a transmission and whether the specified system is able to receive the transmission. The logic in the device adapter includes status logic responsive to the status lines for inhibiting a transmission when the receiving peer system is not ready, arbitration logic responsive to the arbitration lines for deciding which peer system may have access to the link at any given time, and receiver acquisition logic permitting the transmitting device adapter to specify the receiving system, permitting the receiving device adapter to return its address and acknowledge its selection, and permitting the transmitting device adapter to verify the selection and determine whether the receiving system is able to receive data.