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:
Aug. 17, 1999
Filed:
Mar. 13, 1997
B Arlen Young, Palo Alto, CA (US);
Adapter, Inc., Milpitas, CA (US);
Abstract
A method for queuing hardware control blocks, such as SCBs, for a system including a system processor coupled to a plurality of host adapter devices and a buffer memory controller device by an I/O bus is based on use of an endless new hardware command block queue, and an endless done hardware command block queue. The hardware command blocks for a plurality of devices, where each device includes a device processor, are managed by forming an endless queue for a device in a memory external to the device. A first pointer to the endless queue is maintained in a memory that is not within the memory space of the device processor. A second pointer to the endless queue is maintained in a memory addressable by the device processor. The first and second pointers address the head and tail hardware command block array sites of the endless queue.