JPH0221328A - Purpose-based system forming method - Google Patents

Abstract

PURPOSE:To attain the effective use of a memory by deleting the routines of unnecessary system calls in accordance with each purpose of application and taking out only necessary parts for acquisition of a new system. CONSTITUTION:A process 7 is carried out to update the contents of a flag storing area 6 when a job is through with a system. Thus the flags corresponding to the interruption processing routines 2 so far used in the area 6 are set at 1 together with the flags corresponding the unused routines 2 set at 0 respectively. Thus the used and unused routines 2 can be known from the contents of the area 6 storing such flags. Then a new system disk (B drive) 9 is produced from the present system disk (A drive) 8 based on the contents of the area 6 and the process 7 where the unused routines 2 are not copied but only the necessary parts are taken out for copying. In such a way, many disks 9 are obtained in accordance with each purpose of application.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a computer system, and in particular, in the system disk of a personal computer where there is a high demand for effective use of memory, it is possible to reduce the memory capacity taken up by the system, and to The present invention relates to a method for constructing a purpose-specific system suitable for making effective use of memory.

[Conventional technology]

In conventional computer systems, the trend has been to improve the functionality of the system by adding new functions and increasing the size of the system. However, on the other hand, there was no technology to remove unnecessary parts of the system, nor was there any way to miniaturize the system to suit the purpose. Although this improves the functionality of the system, the memory space available to the user is reduced, and the effective use of memory is not sufficient.

[Problem to be solved by the invention]

The above conventional technology introduces a method of adding routines to provide new functions when building a system according to the purpose of use, and although the functions tailored to the purpose of use are enriched, they are unnecessary. The memory capacity taken up by the 5 system only increased because such parts were still included in the system. In other words, from the user's perspective, the enhancement of functionality improves usability, but as more programs are added to the system, the amount of memory available to the user continues to decrease. As described above, no consideration was given to the user area of the memory, and there was a problem in terms of effective use of the user's memory.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for constructing a system for a specific purpose, which eliminates unnecessary routines within a computer system and enables a user to construct a system suited to his/her purpose of use.

[Means to solve the problem]

The above purpose is to create a work area that holds flags corresponding to each system call, an area that stores the flags of that work area, and a logical OR of the stored flags and the flags of the work area. In addition to providing a program that updates the contents of a flag, there is also a program that sets a flag for the work area that corresponds to a certain system call when that system call is used, and a program that sets a flag for the work area that corresponds to the system call when that system call is used. Eliminate dead system call routines, that is, unused system call routines.

This is achieved by a purpose-specific system construction method that includes a program that copies only the necessary parts to a new disk.

[Effect]

In the purpose-based system construction method described above, when a system call is used when a user is using the system for a certain purpose, the flag corresponding to that system call in the work area that holds flags is set to 1. , and before the user finishes using it, the contents of the flag are determined by ORing the contents of the work area that holds the flag with the contents of the area that stores the flag, and stores the result in the area that stores the flag. If you update and use it several times for the same purpose in this way, unnecessary system calls will be limited and the flag will remain 0, so you can determine the contents of the area that stores the flag obtained in this way. Removed routines related to unnecessary system calls,
Since a new system is created by extracting only the necessary parts of the system, by providing programs and areas that perform such operations, users can build and use the system according to their own purposes. I can do it.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a conceptual diagram showing an embodiment of a method for constructing a purpose-specific system according to the present invention. In FIG.

An example is shown in MS-DOS, where 1 is an interrupt vector table, 2 is an interrupt processing routine, 3 is a flag setting routine, and 4 is an entry point of routine 3 that takes the contents of interrupt vector table 1 and flags the contents. 5 is a work area that holds flags, 6 is an area that stores flags, 7 is a process that updates the contents of area 6 that stores flags, 8 is the current system disk (A drive), 9 is The new system disk (B drive) 10 is a process of extracting and copying only the necessary parts.

First, a routine 3 that sets a flag and a process 4 that takes in the contents of the interrupt vector table 1, counts the contents as the routine 3 that sets a flag, and rewrites the contents of the interrupt vector table 1 as the entry point of the routine 3 that sets a flag. By providing this, the jump destination according to interrupt vector table 1 becomes routine 3, which sets a flag, and
From there, the program jumps to interrupt routine 2. Next, a work area 5 that holds the flag operated by the flag setting routine 3 and an area 6 that stores the contents of the work area 5 that holds the flag are provided. By providing a process 7 that calculates the logical sum of the storage area 6 and updates the contents of the flag storage area 6, the flag is first set when the interrupt processing routine 2 is used by the function of the flag setting routine 3. The flag corresponding to the interrupt processing routine 2 in the work area 5 that holds
is set, and after the work by the system is completed, by executing process 7 that updates the contents of area 6 that stores flags, the interrupt handling routine 2 that has been used so far in area 6 that stores flags is updated. The corresponding flag becomes 1, and the flag corresponding to the unused interrupt routine 2 becomes O. Based on the contents of the area 6 that stores the flags obtained in this way, it is possible to know whether each separate processing routine 2 is used or not. Next, based on the contents of the area 6 that stores this flag, a new system disk (B drive) 9 can be created from the current system disk (A drive) 8, and an unused interrupt processing routine This can be realized by providing a process 7 that extracts and copies only the necessary part without copying the part 2.

A new system disk 9 is created by noting that if the purpose of use of the system is limited, the interrupt processing routine 2 to be used is also almost determined. Therefore, users can create and use multiple system disks 9 according to their own purposes. System disks provided by original manufacturers are versatile and can be used for a variety of tasks. However, considering the case where the work is limited, it takes up more memory than necessary because it includes the necessary internal processing routine. If you create the system disk 9, such problems will disappear. Therefore, it is considered to be advantageous in terms of effective use of memory, which is one of the major issues in the field of computer use.

〔Effect of the invention〕

According to the present invention, unnecessary system call routines can be removed according to the purpose of use in computer system calls, and a new system can be constructed by extracting only the necessary parts, thereby minimizing the memory area taken up by the system. This has the effect of allowing the user to utilize memory effectively.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing an embodiment of a method for constructing a purpose-specific system according to the present invention. 1...Interrupt vector table, 2...Interrupt processing routine, 3...Flag setting routine, 4...
A process of fetching the contents of the interrupt vector table 1 and rewriting the contents into the entry point of the routine 3 that sets a flag, 5... a work area for holding the flag,
6... Area for storing flags, 7... Process for updating the contents of area 6 for storing flags, 8... Current system disk (A drive), 9... New system disk (B drive), 1゜... Process of extracting and copying only the necessary parts.红 1 Figure A Dryer A Food B Dry Life

Claims (1)

[Claims] 1. A system construction method that focuses on the fact that the system calls to be used are limited depending on the purpose of use of a computer system, and removes unnecessary system call routines to create a system tailored to the purpose. By manipulating the flags corresponding to the system calls used when using the system, information on necessary and unnecessary system calls for the purpose of use can be stored, and the results can be used to determine the system calls for the purpose of use. A purpose-specific system construction method that is characterized by extracting only the necessary parts of the system, constructing a new system tailored to the purpose of use, and effectively utilizing memory.