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. 04, 1984
Filed:
Sep. 29, 1981
Applicant:
Inventor:
John M Higdon, Lexington, KY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
364900 ; 365 15 ;
Abstract
An arrangement for incorporating a magnetic bubble memory (MBM) into a system having a system processor and a direct access storage (RAM) utilizes digital command words that represent basic MBM data operations. The processor controls the MBM indirectly by assembling strings of command words in RAM which are transferred to a control interface individually by a direct memory access device. The interface then translates the command words into a set of control signals that are applied to the drive system of the MBM. Each string of command words preferably corresponds to a complete memory read or write operation or a major portion thereof.