JPH0464121A - Simulation method for optical disk storage device - Google Patents

Abstract

PURPOSE:To unnecessitate an exclusive computer to simulate a CD-ROM device by discriminating interruption and generating interruption for accessing a disk device after waiting for the lapse of seek time and data read time when the interruption is for accessing an optical disk storage device. CONSTITUTION:In the case of simulation, the interruption vector of a prescribed area 16a is decoded by a CD-ROM simulate program 15 and in the case of access to a flexible or hard disk, those hardwares 17a and 17b are activated. In the case of access to a CD-ROM, the interruption vector is written in the prescribed area of an interruption vector able 16 again, and the hardware 17b for hard disk is activated. Namely, the interruption is discriminated and when the interruption is for accessing the optical disk storage device, the interruption is generated to access the disk device after waiting for the lapse of seek time and data read time. Thus, it is not necessary to provide the exclusive computer for simulating the CD-ROM device.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a simulation method for an optical disk storage device that simulates the operation of an optical disk storage device, which does not require a dedicated computer for simulation and requires less time and effort to create simulation information. The purpose is to receive an interrupt for accessing an optical disk storage device and a disk device, determine which type of access the interrupt is, and when the interrupt is an access to the optical disk storage device, determine the seek time and data read required by the optical disk storage device. The apparatus is configured to wait for an amount of time, generate an interrupt to access a disk device of an optical disk image storing file structure data for the optical disk storage device, read the data, and simulate the optical disk storage device; , when the interrupt is an access to the optical disk storage device, an interrupt is generated to access the optical disk storage device, the optical disk storage device is caused to perform a seek, and the optical disk storage device waits for a time required for reading data. do.

[Industrial application field]

The present invention relates to a simulation method for an optical disk storage device, and more particularly, to a simulation method for an optical disk storage device that simulates the operation of the optical disk storage device.

Optical disk storage devices such as CD-ROM devices that store digital data on compact disks and are used as read-only devices have slower read speeds than other hard disk devices or flexible disk devices.
When handling M data, it is necessary to check the responsiveness of the application program.

[Conventional technology]

Conventionally, in order to check the responsiveness mentioned above, it was actually necessary to check the CD-
A ROM medium was created and an application program was executed.

However, when I looked at the response check results and tried to change the storage location of the data on the CD- and ROM media, the CD-
Since the ROM medium must be recreated, the CD
- It is considered to simulate ROM media.

In this case, a computer that executes a CD-ROM device simulation program is connected to a computer that executes the application program to perform the simulation.

[Problem to be solved by the invention]

Conventional simulation methods require a large-scale computer for simulation, and information necessary for calculating seek time and information for simulation such as the storage location of data files on a CD-ROM medium are required for the simulation target. CD
- There was a problem in that it had to be provided for each ROM medium, and it took a lot of time and effort to create this simulation information.

The present invention has been made in view of the above points, and an object of the present invention is to provide a method for simulating an optical disk storage device that does not require a dedicated computer for simulation and requires less time and effort to create simulation information. .

[Means to solve the problem]

A method for simulating an optical disk storage device of the present invention includes: receiving an interrupt for accessing an optical disk storage device and a disk device, determining which type of access the interrupt is for, and determining whether the interrupt is an access to the optical disk storage device; Wait for the seek time and data read time required by the device, generate an interrupt to access the disk device of the optical disk image that stores data of the file structure standard for optical disk storage devices, read the data, and simulate the optical disk storage device. Do this.

Furthermore, when the interrupt is accessing the optical disk storage device, instead of waiting for the seek time and data read time required by the optical disk storage device, an interrupt is generated to access the optical disk storage device and the optical disk storage device performs the seek, A wait is performed for the data read time required by the optical disk storage device.

[Effect]

In the present invention, if an interrupt is determined and the interrupt is for accessing the optical disk storage device, an interrupt for accessing the disk device is generated after waiting for the seek time and data read time. CD-R
There is no need to provide a dedicated computer to simulate the OM device, and since the optical disk image is stored in the disk device, there is no need to create information for simulating the storage location of the data file, reducing the time and effort required for simulation. It's over.

Further, by having the optical disk storage device perform the seek, there is no need to create simulation information for calculating the seek time, and the effort required for simulation can be further reduced.

〔Example〕

FIG. 1 shows a block diagram of an embodiment of the method of the present invention.

In the same figure, in the computer IO, an application program 11. For example, an operating system (O3) 12 that supports input/output of flexible and hard disk devices such as MS-DO3, and an operating system (O3) 12 that supports input/output of CD-ROM devices such as MSCDEX. CD-R with 14 basic attendance systems (BiO2)
The OM simulation program 15 is executed. 081
2.13 and CD-ROM simulation program 15
Alternatively, the interrupt vector of an interrupt generated by the application program 11 is written to a predetermined area 16a of the lid table 16 for interrupts.

During normal operation, the interrupt vector in this predetermined area 15a is BI
Disk BIO3 handles disk input/output in O314
14a, the flexible disk hardware 17a, the hard disk hardware 17b, and the CD
- Each of the ROM hardware 17c is activated, and these hardware 17a to 17c cause the flexible disk device I8. Hard disk device 19. CD-RO
Each of the M-equipped FIs 120 is accessed.

During simulation, the interrupt vector in the predetermined area 16a is C.
The data is decoded by the D-ROM simulation program 15, and in the case of access to a flexible disk or hard disk, the flexible disk hardware 17a or hard disk hardware 17b is activated by the CD-ROM simulation program 15, and the CD-ROM is decoded by the D-ROM simulation program 15.
- In the case of access to ROM, the interrupt vector table 1 is set by the CD-ROM simulation program 15.
The interrupt vector is written again into the predetermined area of 6, and the hard disk hardware 17b is activated.

By the way, the data to be stored on the CD-ROM medium is created separately as a plurality of data files 30+ to 30, as shown in FIG.
is IS O9660 format conversion program 31
Each file is sequentially converted into the IS 09660 format, which is a file structure standard for CD-ROMs of the International Organization for Standardization (ISO), and stored in a sequential access hard disk drive 19. It is connected to the hardware 17b.

Incidentally, data files in the 15O9660 format of the hard disk device I9 are sequentially written and stored on the actual CD-ROM medium.

FIG. 3 shows a flowchart of a first embodiment of the method of the invention. This process is started by the occurrence of an interrupt for disk operation, and the interrupt vector in the predetermined area 16a is
The interrupt entrance of the M simulation program is entered (step 40), and it is determined whether the access is to a CDROM device, another flexible disk device, or a hard disk device (step 41).

In the case of accessing the CD-ROM device, it is determined whether the operation is a seek, a data read, or another operation (step 42). In the case of a seek, use the CD-ROM simulation program to move from the current gutter position to the desired head position of the seek destination.1. It calculates the time it takes to move, waits for that time (step 43), and ends the process. If it is determined in step 42 that data is to be read, wait for the time it takes to move the head from the current position to the position where the target data exists.Step 4
4), wait for a time corresponding to the amount of data to be read, and step 45), calculate whether and part of the data of the CD-ROM image on the hard disk should be read, and read the target data from the hard disk. An interrupt is generated to issue (step 46), and the process returns to step 40. Step 4
If step 2 is determined to be another operation, control is transferred to the original disk BIO 314a in the same state as when the CD-ROM simulation program was interrupted.Step 4
7), C by the original disk BIO 314a processing.
The D-ROM device 20 is operated (step 48).
, ends the process.

In addition, if it is determined in step 41 that the access is to a device other than the CD-ROM device, the original disk B is restored in the same state as when the CD-ROM simulation program was interrupted.
The control is transferred to the IO 314a (step 48), and the flexible disk device 18 or the hard disk device 19 is accessed by the original processing of the disk BIO 314a (step 48), and the process ends.

In this way, if an interrupt is identified and the interrupt is for accessing the optical disk storage device, an interrupt is generated to access the disk device after waiting for the seek time and data read time. - There is no need to provide a dedicated computer to simulate the ROM device, and since the optical disk image is stored in the disk device, there is no need to create information for simulating the storage location of data files, reducing the time and effort required for simulation. It's done.

FIG. 4 shows a flowchart of a second embodiment of the method of the invention. This process is started by the occurrence of an interrupt due to a disk operation, and the interrupt vector in the predetermined area 16a is
The interrupt entrance of the M simulation program is entered (step 50), and it is determined whether the access is to a CD-ROM device, another flexible disk device, or a hard disk device (step 51).

In the case of access to the CD-ROM device full, it is determined whether the operation is data read, seek, or other operation (step 52). In the case of data reading, an interrupt is generated to seek to the data reading position and the disk BIO31
4a to cause the CDROM device 20 to execute a seek operation (step 53). When this seek operation is completed, the process waits for a time corresponding to the amount of data to be read (step 54), and calculates which part of the data in the CD-ROM image on the hard disk is to be read and reads the desired data from the hard disk. An interrupt is generated (step 55), and the process returns to step 50.

If it is determined in step 52 that it is a seek or other operation of a CD-ROM device, or if it is determined that it is an access to a flexible disk device or hard disk device, the process proceeds to step 56, where the CD-ROM simulation program is executed. Control is transferred to the original disk BIO 3 in the same state as when it was loaded, and access to the flexible disk device 18, hard disk device 19, or CD-ROM device 20 is performed by the processing of the original BIO 314a (step 57), and the process ends. do.

In this embodiment, since the optical disk storage device 20 performs a pseudo seek operation, there is no need to create simulation information for calculating seek time, further reducing the effort required for simulation. At the same time, the error between the simulation and the actual CD-ROM device access is reduced, making it possible to perform a highly accurate simulation.

〔Effect of the invention〕

As described above, the method for simulating an optical disk storage device of the present invention does not require a dedicated computer for simulation, and does not require much effort to create simulation information, making it extremely useful in practice.

40-5 shows.

7 is step

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of an embodiment of the method of the present invention, and Figure 2 is a CD
- A diagram for explaining the creation of a ROM image data file. FIGS. 3 and 4 are flowcharts of each embodiment of the method of the present invention.

Claims (2)

[Claims] (1) Upon receiving an interrupt to access an optical disk storage device and a disk device, determine which type of access the interrupt is, and if the interrupt is an access to the optical disk storage device, determine the seek time and data read required by the optical disk storage device. The method is characterized in that the method waits for an amount of time, generates an interrupt to access a disk device of an optical disk image that stores file structure data for the optical disk storage device, reads the data, and simulates the optical disk storage device. A simulation method for optical disk storage devices. (2) Upon receiving an interrupt to access an optical disk storage device and a disk device, determine which type of access the interrupt is, and if the interrupt is an access to an optical disk storage device, generate an interrupt to access the optical disk storage device. and causes the optical disk storage device to perform a seek, waits for the data read time required by the optical disk storage device, and generates an interrupt to access the disk device of the optical disk image that stores the data of the file structure for the optical disk storage device. 1. A method for simulating an optical disk storage device, characterized in that the optical disk storage device is simulated by reading data from the optical disk storage device.