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. 21, 1995
Filed:
Jan. 25, 1994
William T Krein, San Jose, CA (US);
Ronald R Hochsprung, Los Gatos, CA (US);
James D Kelly, Aptos, CA (US);
Apple Computer, Inc., Cupertino, CA (US);
Abstract
Signal transactions are conducted between nodes coupled to a bus, without causing bus deadlock during split transactions. Deadlock avoidance is achieved by rendering a node effectively unavailable at such times to serve as a bus slave for a new bus master. When the 'locking' node serves as a transaction source, deadlock is avoided by deasserting, during a split transaction, a buffer-available signal, which is used normally to indicate receiver buffer availability. Additionally, when the 'locking' node serves as a transaction destination, deadlock is avoided by deasserting a bus-ownership request signal, which is used normally for requesting bus ownership. After completion of the split transactions, such signals may be unmasked.