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:
Oct. 03, 2000
Filed:
Jun. 06, 1995
Iwao Yamamoto, Tokyo, JP;
Katsumi Matsuno, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An electronic apparatus includes a CPU, a ROM, a RAM, an input port, a data bus, an address bus, a patching portion address register and a patching interrupt vector register which are connected to the data bus. A comparator compares a coincidence of the address stored in the address register with an address on the address bus and, in response thereto, supplies an interrupt to an interrupt control portion of the CPU. The interrupt control portion of the CPU is also supplied with other interrupts, for other processing. Further, an external storage device, connected to the input port, supplies a program bug patching information to be stored into the RAM. The RAM includes a stack area in which, during interrupt processing, there are saved data written in the address register and the patching interrupt register. Thus, patching of program bugs can be carried out even during an interrupt.