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:
Apr. 06, 2004
Filed:
Dec. 13, 1999
Takeshi Imai, Hamura, JP;
Hiroki Sato, Fussa, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A signal processor executes a required process based on a program stored in a RAM connected to the signal processor. The program is transferred from a ROM connected to a CPU, as requested. When the CPU determines based on the status of the RAM that the contents of a particular one of instructions which compose a particular program among the programs stored in the ROM should be changed, the CPU changes the contents of the instruction and transfers the changed instruction to the RAM. When a first one of a plurality of programs stored in the RAM is replaced with a second program transferred from the ROM, and the areas of the RAM used by the first and second programs are different, the CPU also changes the contents of instructions of other programs which are not required to be replaced.