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. 31, 1994
Filed:
Jul. 10, 1992
William M Johnson, San Jose, CA (US);
Timothy A Olson, Sunnyvale, CA (US);
Drew J Dutton, Santa Monica, CA (US);
Sherman Lee, Palos Verdes Estates, CA (US);
David W Stoenner, El Toro, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
Methods and apparatus are disclosed for transferring data to and from the Local Bus of a reduced instruction set computer (RISC) system, to which a first set of high performance devices, including at least one central processor ('CPU'), is attached, and a Remote Bus, to which a second set of relatively lower performance devices is attached, in a manner that does not limit the RISC processor's performance. According to the preferred embodiment of the invention, a RISC architecture is disclosed that includes a novel data transfer controller ('DTC'), or set of DTCs, suitable for performing the aforesaid data transfer function between the high performance Local Bus and one or more Remote Buses to which complete subsystems or peripherals, typically having different (and lower) performance characteristics, are attached. The resulting RISC arthitecture permits commercially available peripherals and subsystems to be used with high performance RISC processors without limiting RISC system performance.