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. 24, 1976
Filed:
Mar. 26, 1975
Garvin Wesley Patterson, Glendale, AZ (US);
Marion G Porter, Phoenix, AZ (US);
Honeywell Information Systems, Inc., Phoenix, AZ (US);
Abstract
An input-output processing system which performs communication and control functions in a larger data processing system includes a processor for address development to paged memory and program instruction execution for I/O command sequences. In generating memory addresses, instructions are provided an address syllable which references a processor register as an index and a displacement. The contents of the register and the displacement define a memory effective address. A scratchpad memory is provided for storing page table words in levels corresponding to priority levels of processes, and stored page table words are accessed according to the least significant bits of the page number of the effective address. A page base address is taken from an accessed page table word and is concatenated with the effective address to define an absolute memory address.