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:
Sep. 12, 1989
Filed:
Sep. 24, 1987
Keith B DuLac, Derby, KS (US);
Dennis E Gates, Wichita, KS (US);
NCR Corporation, Dayton, OH (US);
Abstract
A disk drive controller bus architecture for interfacing disk drives having widely varying data format requirements with small computer systems is comprised of a disk drive parameter storage section, a disk drive parameter compartor/interface section and a set of associated data buses, coupled between a disk drive controller processor and the disk drive. The disk drive parameter storage section contains a set of control registers and a (format option) random access memory which may be written to and read by the control processor and serves to store drive control codes that are selectively coupled over a first of the set of associated data buses for application to the disk drive parameter comparator/interface section. The disk drive parameter comparator/interface section contains multiplexer and format conversion circuitry for interfacing data between the disk, storage/buffer components of the bus architecture itself, and the control processor. This section also contains comparator and auxiliary storage circuitry coupled with a second of the set of associated data buses, for comparing data read from the disk with parameter data stored in and selectively accessed from the disk drive parameter storage section.