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:
Jan. 10, 1984
Filed:
Nov. 06, 1979
Jack L Woodell, La Canada, CA (US);
Frederick Electronic Corporation, Frederick, MD (US);
Abstract
A microcoded processor for use in a distributed processing telex exchange to time share process each termination connected to the processor is disclosed. The processor executes selected signaling routines for each termination. The processor contains a sequence file that outputs the address of the next termination to be time share processed. This information controls the transfer of data between the processor and the termination currently being time share processed. Also included in the processor is a constant and a variable data file which contains blocks of data associated with each termination and which contains data needed to execute the selected signaling routine for each termination. A program re-entry file is provided to control the time share execution of each signaling routine since only a predetermined number of microcode instructions are executed in each time share interval. At the end of each time share interval, the program counter contents are stored in the re-entry file location associated with the termination just processed. To enable high-speed processing while cutting down on software overhead, two high-speed cache memories, one for the data from the constant file and one for the data from the variable file, is used. The data for the next termination to be time share processed is loaded into the caches one time share interval ahead of when it is used so that program execution can continue uninterrupted at the end of each time share interval.