JPS6145548Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a program execution device, and more particularly to a program execution device that has a unique data storage function in a processing system such as a microcomputer that has an instruction execution function.

The system configuration of a conventional microcomputer consists of a central processing unit (hereinafter referred to as CPU) that decodes and executes the instructions of a given program, a storage device for storing the program (hereinafter referred to as program memory), and Consists of a storage device for storing data indicating processing results (hereinafter referred to as data memory), and an input/output device (hereinafter referred to as I/O device) that exchanges information with peripheral devices such as human-powered mechanisms and controlled systems. has been done. However, since the program memory and data memory are provided independently from other devices in this system, it is possible to use the same CPU, I/O device, and data memory by copying the contents of the program memory. For example, a system identical to that microcomputer system can be easily created.

Therefore, in systems that require program secrecy, such as microcomputer systems used in video games, it is easy for others to imitate newly developed game programs and imitate the system. There was a big drawback. Various attempts have been made to avoid this, such as changing the program setting order or encrypting the program code so that the contents of the program memory cannot be copied, but no complete workaround has yet been provided. do not have.

SUMMARY OF THE INVENTION An object of the present invention is to provide a program execution device for a system that allows copying of a program but does not execute the same operation only with the copying program.

That is, the present invention adds a twist to the storage method of data processed by program execution, so that although the program itself can be imitated, it does not allow imitation of the system.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Figure 1 shows the program execution device of the present invention applied to a video game system, the main configuration of which is
CPU1, program memory 2, data memory 3
An I/O device 5, an image data memory 6 for storing the contents of images or characters to be displayed on the television screen, sequentially reads out the contents of the image data memory 6, and sends brightness signals and color signals corresponding to the data to the television. It includes a television interface device 7 that creates a video signal by combining it with a synchronization signal, and a data processor 4 that stores data created by program execution in a special method, and a cathode ray tube 8 is connected to the television interface device 7. By doing so, the game image will be displayed. The CPU 1 sequentially reads programs preset in the program memory 2, and determines the input conditions input from the I/O device 5 based on the combination of instructions, such as the state of the direction change lever, missile launch button, etc.
Accordingly, the data memory 3 is rewritten, compared, etc., and the image data memory 6 is rewritten based on the results. In this series of program processing, the data memory 3 is a memory that stores the processing results of the CPU as data. In the conventional system, only the data memory 3 was set as a storage section for processing data, so that if the program in the program memory 2 was copied, the system could be easily imitated.

In this regard, in this embodiment, as clearly shown in FIG. 1, a data processor 4 is provided outside the data memory 3 as a part of the data storage section. That is, CPU
The processing result of the program executed by the processor 1 is stored in the data memory 3 and the data processor 4. In particular, it is better to use a one-chip microcomputer having an internal program as the data processor 4. If a data storage procedure is programmed into the ROM in the 1-chip microcomputer, when the data sent from CPU 1 satisfies a predetermined condition, the data storage procedure set in the ROM will be programmed into the 1-chip microcomputer. Data is stored in RAM.
Moreover, the ROM of a 1-chip microcomputer
It is extremely difficult to read the internal programs from the outside, and it is impossible to know how data is stored in the RAM within a single-chip microcomputer. Therefore, even if the program in the program memory 2 is copied, it is impossible to imitate the system unless the ROM in the one-chip microcomputer is known. As a result, the same system cannot be duplicated, and the confidentiality of the system is sufficiently maintained.

Note that the data processor 4, for example, determines the state of a predetermined bit of the information output from the CPU 1, writes data to its own memory only when the state is determined, or writes the contents of a specified data address. Output. Further, the data itself may be converted and exchanged with the CPU 1.

This invention is characterized by a different procedure for storing data after CPU processing from conventional methods, and by using the data processor as a data storage unit, the processing procedure is kept confidential. . Therefore, it is fully applicable to systems other than video game machines.

[Brief explanation of drawings]

FIG. 1 is a block diagram of essential parts showing an embodiment of the present invention. 1...CPU, 2...Program memory, 3...
...Data memory, 4...Data processor, 5...
...I/O device, 6... Image data memory, 7...
Television interface device, 8... Cathode ray tube (display section).

Claims (1)

[Scope of utility model registration request] a program memory in which the program is set;
A single chip that includes, on the same chip, a program processing section that executes processing based on the program, a data memory that stores part of the data handled during execution of the processing, and a memory that stores the other part of the data. a microcomputer, and the other part of the data is stored in the memory of the single-chip microcomputer based on a program stored in advance in the program memory of the single-chip microcomputer. Device.