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. 19, 1988
Filed:
May. 30, 1984
Ming-Luh Kao, Miami, FL (US);
Jong-Keung Cheng, Miami, FL (US);
Racal-Milgo, Inc., Miami, FL (US);
Abstract
A microprocessor-based system is provided with a non-volatile store (such as a PROM) which stores a bootstrap program, a non-volatile store (such as an EPROM) which stores one or more program overlays, and a programmable volatile store (such as a RAM) which can be written into and read from. When the system is powered up, the microprocessor executes the bootstrap program out of the PROM. The bootstrap program includes instructions which copy the program instructions stored in the EPROM into the RAM. The microprocessor then executes the program instructions out of the RAM. Program instructions may be stored in the EPROM in a plurality of overlays, and individual overlays selected by either the bootstrap program or instructions contained in another overlay may be selectively loaded into the RAM for execution. The EPROM is addressed by a programmable counter which appears to the microprocessor as an input/output device to be written into.