KR20010095892A - a method for excuting programs using the Hyperstone CPU - Google Patents

Abstract

PURPOSE: A method for executing a program using a central processing unit of the Hyperstone company is provided to execute a program using a small-sized memory without a code ROM by storing the program in a mask ROM with data and loading the program in a memory and executing the program. CONSTITUTION: A CPU obtains the starting address of a program being stored in a mask ROM through an OS BIOS unit(ST101). The CPU obtains an address and a size of a stored code segment(ST102). The CPU loads the code segment being stored in the mask ROM to a memory through the OS BIOS unit(ST103). The CPU obtains an address and a size of a stored text segment being used in the program stored in the mask ROM through the OS BIOS unit(ST104). The CPU loads the text segment being stored in the mask ROM to the memory through the OS BIOS unit(ST105). The CPU obtains an address and a size of a stored data(Far_bss) segment being used in the program stored in the mask ROM through the OS BIOS unit(ST106). A size of the memory occupied by the code segment, the text segment and the data segment is calculated(ST107). The CPU sets a size of the memory for preventing a memory area from being invaded by the loaded program, and the program loaded to the memory is executed(ST108,ST109).

Description

Executing a program using Hyperstone's central processing unit {a method for excuting programs using the Hyperstone CPU}

The present invention relates to a method for executing a program by using a central processing unit of Hyperstone, and in particular, a separate code ROM for storing a program is unnecessary as the program stored in the mask ROM with data is loaded into the memory and executed. The present invention relates to a method of executing a program using a central processing unit of Hyperstone which can execute a program even with a small amount of memory.

In general, the central processing unit (CPU) performs overall control of data processing such as calculation and input / output, etc. in the system, and the central processing unit of the Hiberstone company always stores a program stored in a code ROM in a memory (RAM). It loads and executes, and the data used by the program is saved in a separate mask.

Figure 3 is a block diagram schematically showing the internal configuration of a child learner, which is an example of a conventional system in which the central processing unit of the Hyperstone Inc. is used, which detachably mounts and uses a software package (ROM PACK) in which a learning program is stored. A diagram showing a baby learner.

As shown in the figure, the software package 110 is equipped with a code rom 111 storing a program and a mask rom 112 storing data used by the program, respectively, and the software package 110 is removable. The system board 120 to be mounted on the memory 120 includes a memory 122 for loading a program stored in the central processing unit 121 and a software package 110 of Hyperstone, and an OS / BIOS unit for loading a program into the memory 122 ( 123 is installed.

In addition, video and audio signals, which are outputs of programs driven by the central processing unit 121 of Hyperstone, are output to the outside through the video and audio output units 124 and 125 mounted on the system board 120, respectively.

Therefore, when the software package 110 is mounted on the system board 120 to drive the infant learner, the central processing unit 121 of the Hiberston company executes the program stored in the code ROM 111 through the OS / BIOS unit 123. The memory 122 is loaded and executed, and the necessary data is retrieved from the mask ROM 112 and used.

However, the central processing unit of the Hyperstone company as described above has a problem in that the production cost of the system is increased according to the characteristics of the coderom in which the program is stored and the maskrom in which the data is stored. In addition, as the program is automatically loaded into the memory by the OS and BIOS unit, there is a problem in that the memory capacity in the system must be increased to drive the program when the size of the program data stored in the code ROM increases.

Accordingly, the present invention has been invented to solve the above problems, and the program is stored in a mask ROM with data, and the program is stored in the ROM as it is loaded and executed. It is an object of the present invention to provide a method for executing a program using a central processing unit of Hyperstone, which can execute a program even in the memory of a computer.

In order to achieve the above object, the present invention provides a system having a central processing unit of the Hiberstone company, wherein the central processing unit of the Hiberstone company is programmed from a mask ROM in which a program and data are stored through an OS / BIOS unit. A first step of obtaining an address and a size at which a start address of the code segment and a code segment, which is an actual program, are stored, and loading the code segment stored in the mask ROM into a memory; When the code segment is loaded into the memory in the first step, the Hiberston's central processing unit obtains the address and size in which the text segment, which is a character used in the program stored in the mask ROM, is stored in the mask ROM through the OS BIOS unit. Loading the stored text segment into memory; In the second step, when the text segment is loaded into the memory, the Hiberston's central processing unit obtains the address and the size where the data segment (Far_bss Segment), which is data used in the program stored in the mask ROM through the OS / BIOS unit, is stored. And a third step of calculating a size of a memory occupied by a program consisting of a text segment and a data segment; A fourth step of setting the size of the available memory and executing the program so that the central processing unit of the Hiberston company does not invade the memory area used by the program when the size of the memory occupied by the program is calculated in the third step; It is characterized by.

1 is an internal configuration of an infant learner as an example of a system to which the present invention is applied

Schematic block diagram,

2 is a flowchart illustrating a method of executing a program according to the present invention;

3 is an example of a conventional system in which a central processing unit of Hyperstone Inc. is used.

Block diagram schematically showing the internal structure of the baby learner.

Explanation of symbols for main parts of the drawings

10: Software Package 11: Mask ROM

20: system board 21: central processing unit

22: memory 23: OS, BIOS section

24: video output unit 25: audio output unit

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

1 is a view schematically showing an internal configuration of a baby learner as an example of a system to which the present invention is applied. The software package 10 is equipped with a mask ROM 11 in which a program is stored together with data. The system board 20 on which the package 10 is detachably mounted is equipped with a central processing unit 21 of Hyperstone Inc. and a memory 22 into which a program stored in a software package is loaded.

In addition, the system board 20 is equipped with an OS / BIOS section 23 for loading a program stored in the software package 10 into the memory 22. The OS / BIOS section 23 includes a software package 10. The program for loading the program stored in the mask ROM 11 into the memory is loaded.

On the other hand, video and audio signals, which are outputs of programs driven by the central processing unit 21 of Hyperstone Inc., are output to the outside through the video and audio output units 24 and 25 mounted on the system board 20, respectively.

Next, a method of executing a program according to the present invention applied to a system equipped with a central processing unit of Hyperstone as described above will be described in detail with reference to FIG. 2.

When the software package 10 is mounted on the system board 20 to drive the infant learner, the central processing unit 21 of the Hyperstone company stores the program stored in the mask ROM 11 through the OS / BIOS unit 23. Is loaded into the memory 22 and executed, and necessary data is retrieved from the mask ROM 11 for use.

In other words, the central processing unit 21 of the Hyperstone company obtains the start address of the program stored in the mask ROM 11 through the OS / BIOS unit 23 (ST101), and is a code segment that is an actual program. ) Obtains the stored address and size (ST102). When the address and size of the code segment are obtained in this manner, the central processing unit 21 of the Hyperstone Inc. loads the code segment stored in the mask ROM 11 into the memory 22 via the OS / BIOS unit 23 (ST103).

On the other hand, the code segment is loaded into the memory 22 as described above, and the central processing unit 21 of Hiberston Corporation uses the text segment (the character used in the program stored in the mask ROM 11 through the OS BIOS section 23). Text Segment) gets the address and size stored (ST104). When the address and size of the text segment are obtained in this way, the central processing unit 21 of the Hyperstone Inc. loads the text segment stored in the mask ROM 11 into the memory 22 via the OS / BIOS unit 23 (ST105).

In addition, when the text segment is loaded into the memory 22, the Hiberston CPU 21 is a data segment (Far_bss Segment) which is data used in a program stored in the mask ROM 11 through the OS BIOS section 23. Obtains the stored address and size (ST106), and calculates the size of the memory 22 occupied by the program consisting of the code segment, the text segment, and the data segment (ST107).

When the size of the memory 22 occupied by the code segment, the text segment and the data segment of the program is calculated as described above, the central processing unit 21 of the Hiberston company can use the memory so as not to invade the memory area used by the loaded program. The size of (22) is set and the program loaded into the memory 22 is executed (ST108 to ST109).

As described above, the present invention stores a program together with data in a mask ROM and loads a separate program for loading the program into a memory in OS / BIOS to load and execute the program stored in the mask ROM into a memory. It is possible to reduce the production cost of the system by eliminating the need for a separate code rom, and also have the effect that a program can be executed with a small amount of memory.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined only by the appended claims.

Claims (1)

In the system having the central processing unit 22 of the Hiberstone company, the central processing unit 21 of the Hiberstone company is supplied from the mask ROM 11 in which the program and data are stored through the OS / BIOS unit 23. First steps (ST101 to ST103) of loading the code segment stored in the mask ROM 11 into the memory 22 by obtaining an address and a size at which a program start address and a code segment, which is an actual program, are stored; When the code segment is loaded into the memory 22 in the first step, the text segment (Hiberston's central processing unit 21) is a character used in a program stored in the mask ROM 11 through the OS / BIOS unit 23 ( A second step (ST104 to ST105) of obtaining the address and the size where the text segment is stored and loading the text segment stored in the mask ROM 11 into the memory 22; In the second step, when the text segment is loaded into the memory 22, the Hiberston CPU 21 is data segment which is data used in a program stored in the mask ROM 11 through the OS BIOS section 23 ( A third step (ST106 to ST107) of obtaining the address and the size where the Far_bss Segment) is stored and calculating the size of the memory 22 occupied by the program consisting of the code segment, the text segment and the data segment; When the size of the memory 22 occupied by the program is calculated in the third step, the size of the usable memory 22 is set so that the central processing unit 21 of the Hiberston company does not invade the memory area used by the program. And a fourth step (ST108 to ST109) of executing the program.