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Patent Searching and Data


Title:
ONE-CHIP MICROCOMPUTER
Document Type and Number:
Japanese Patent JPS5729123
Kind Code:
A
Abstract:

PURPOSE: To modify and increase additionally the contents of a program upon occasion by connecting the mass-storage RAM of a one-chip microcomputer to an ROM in another body, and by loading system software from the ROM into the RAM.

CONSTITUTION: A one-chip microcomputer A has a small-storage ROM for a program memory, a mass-storage RAM used even for software, a CPU, etc., and its RAM is connected to an ROM in a different body. Once a power source is put to work, system software is loaded from the different-body ROM into the mass-storage RAM, where the software is executed to input information on addresses, etc., from the RAM to the different-body ROM via an address counter. Consequelty, another desired ROM is used at a user side to modify or increase additionally the contents of a program later upon occasion, and a general-purpose system is constituted.


Inventors:
NAKANISHI SACHIHIRO
Application Number:
JP10450380A
Publication Date:
February 17, 1982
Filing Date:
July 29, 1980
Export Citation:
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Assignee:
DENSEI KK
International Classes:
G06F1/00; G06F9/445; G06F15/78; (IPC1-7): G06F1/00; G06F3/00; G06F9/06; G06F13/00; G06F15/06