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:
Mar. 20, 1979
Filed:
Jun. 22, 1977
Adrianus M De Bijl, Beekbergen, NL;
Hans Cramwinckel, Beekbergen, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An address conversion device for use with computer systems including a central processing unit and peripheral memory storage devices, such as discs, tapes and bubble memories, which serve for secondary data storage and in which binary data elements are stored in sequential addressable storage sectors. Such storage sectors have precise physical locations on the peripheral storage units. The address conversion device includes a first conversion unit which controls the conversion of user program addresses to logical addresses reflecting the logical structure of the data files stored in the peripheral storage units and a second conversion unit which converts the logical addresses to precise physical addresses of sectors of the secondary storage units in the form of electrical signals, such that the secondary storage units can be addressed as if they were random access units. Replacement of one type of secondary storage unit by another requires only a programmed change of quantitative parameters in the program controlling the address conversion device.