JPH01155437A - Operating system - Google Patents

Abstract

PURPOSE:To execute respective application program normally in spite of regulated operating speed by changing the operating speed of a CPU according to the operating speed information of the CPU recorded on a directory. CONSTITUTION:An area 4a where the operating speed of the CPU is set in advance is provided in the reverse area 4 of an MS-DOS directory. When the application program is read under an MS-DOS, a value representing the speed of the CPU is taken out from the area 4a, and a CPU speed switching driver switches the operating speed of the CPU according to the value. The operating speed set in the area 4a is regulated at 0H-3H. No switching of the operating speed is performed when an operating speed switching value is set at 0H, and the operating speed is switched to 4MHz when it is set at 1H, to 8MHz when it is set at 2H, and to 12MHz when it is set at 3H, and the application program is executed after the operating speed is switched.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an operating system for a personal computer or the like.

(Prior art) Generally, application programs under MS-DO3 run on a specific personal computer, but the hardware in personal computers has made remarkable progress, and the operating speed of the CPU is 4 Mllz, 8 Mff.
The speed is increasing to 12Ml1z.

However, since many application programs are created based on the operating speed of a specific CPU, if the operating speed of the CPU is different from the specified one, the application programs may not be executed properly.

(Problems to be Solved by the Invention) As described above, in conventional operating systems, there is a problem that if the specified speed of the application program is different from the actual operating speed of the CPU, the application program cannot be executed. there were.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide an operating system that can execute application programs regardless of the specified speed of the application programs.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve this object, the present invention loads one of a plurality of application programs stored in a predetermined file according to the contents of the directory, and In an operating system that operates a device that can switch the CPU operating speed with a switching command from In this case, the switching command is given to the 5A position according to the information.

(Function) In the operating system of the present invention, information indicating the operating speed of the CPU specified for each application program is recorded in advance in the directory, and the operating speed of the CPU is changed according to this information. Each application program executes normally no matter what it is.

(Example) Hereinafter, details of an example of the present invention will be described based on the drawings.

FIG. 1 shows an MS-D as an embodiment of the present invention.

FIG. 2 is a diagram showing the structure of a directory of S.

The directory in this example is area 1 indicating the file name.
, area 2 indicating the extension, area 3 indicating file attributes, area 4 reserved for extended functions (hereinafter referred to as the reserved area), area 5 indicating the last update time of the file, It consists of an area 6 indicating the last update date of the file, an area 7 indicating the starting clusters l and Q of the file, and an area 8 indicating the size of the file.

The reserve area 4 is provided with an area 4a in which the operating speed of the CPU is set in advance.

In this area 4a, the operating speed of the CPU is defined by Ol-1 to 3H, such as 0[1-speed irrelevant 1 to 1 = 4 Mlb 2 H = 8 MHz 3H-12 MItz.

FIG. 2 is a diagram showing the system structure under the MS-DO8 of this embodiment.

In the figure, 10 is an application program that operates under this MS-DO8, and 11 is an extended Japanese MS-DO.
8 and 12 are CPU speed switching drivers, 13 is B I O
S (Ba5ic Input 0output 5ys
te Peng).

In this embodiment, the CPU is used for commands under MS-DO8.
A command has been added to support changing the operating speed.

Note that the MS-DO8 of this embodiment is made so as not to depend on hardware, and the 810813 performs the interface with the parts that depend on hardware.

The actual execution of the application program is as follows.

First, the application program is MS-D.

When it is read under S, the value indicating the CPU speed is taken out from the rear 4a, and this is the CPLI speed switching driver 1.
Passed to 2.

The CPU speed switching driver 12 switches the operating speed of the CPU according to this value.

For example, if the value is Ol-1, the operating speed will not be changed and the value is 1.
H is 4M1tz12H is 8M ratio, 31-1 is 12
Switch to M7.

Note that switching the operating speed can be easily realized, for example, by frequency-dividing the reference clock signal of CPtJ.

After switching the operating speed of the CPU, the application program is executed.

Thus, according to this embodiment, even if the prescribed operating speeds of each application program are different, the programs can be executed by one CPU.

Furthermore, even if the operating speed of the CPU changes and existing application programs cannot be executed, MS-
If the operating speed of the CPU is reset using the command under DO8, the application program can be executed.

In this embodiment, the address assigned to the area indicating the operating speed is just an example, and it goes without saying that other addresses may be assigned.

[Effects of the Invention] As explained above, in the operating system of the present invention, since the operating speed of the CPU is switched according to the contents of the directory at the time of loading the application program, the application program can be executed regardless of the specified operating speed. can.

[Brief explanation of the drawing]

FIG. 1 shows an MS-D as an embodiment of the present invention. FIG. 2 is a diagram showing the structure of the S directory, and FIG. 2 is a diagram showing the system structure under MS-DO8 in this embodiment. 1... Area showing the file name, 2... Area showing the extension, 3... Area showing the file attributes, 4...
... Reserve area, 4a... Area showing operation speed, 5... Area showing last update time, 6... Area showing R last update date, 7... Area showing start cluster number, 8 ...An area that shows the file size. Applicant Toshiba Corporation Representative Patent Attorney Sasa Suyama −

Claims (2)

[Claims] (1) In an operating system that loads one of a plurality of application programs stored in a predetermined file according to the contents of a directory and operates a device capable of switching the operating speed of a CPU by an external switching command, Information indicating the operating speed of the CPU corresponding to each application program is recorded in the directory, and when loading any application program, the switching command is given to the device according to the information. operating system. (2) The operating system according to claim 1, wherein information indicating the operating speed of the CPU is recorded in an extended function reserved area in the directory.