JPH09167349A - Simulation device for information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simulation device for double speed and fourfold speed CD drive device. SOLUTION: A secondary storage 7 is a hard disk device dividing the material of the CD data normally stored in a CD-ROM into plural files and keeping them, and a all-purpose computer 6 controls the regenerative data for editing the order of the files to the image of the required CD-ROM. Further, an interface 8 is constituted of a buffer 9 temporarily storing a command sent from a drive control part 2, a judgement part 10 judging the command, a command sending part 11 analyzing the command and outputting the result to the all- purpose computer 6 and a data transfer part 12 controlling the data transfer of the regenerative data outputted from the all-purpose computer 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simulation device for simulating a drive device (drive device) of an information recording medium in which moving images, still images, sounds, and computer data are recorded in a mixed manner, and more particularly to a compact disc. The present invention relates to a CD-ROM simulation device capable of easily performing a data debugging operation when producing data on a CD-ROM for recording data on a (CD).

[0002]

2. Description of the Related Art Conventionally, there is an information recording medium called CD-ROM in which data such as computer software and game software is recorded on a compact disc (CD) for music. Since a large amount of this CD-ROM is produced using a stamper, debugging data addition, correction, replacement, etc. is performed while confirming the data to be recorded before producing the master disc, to make it completely correct data. It is necessary to produce a master disc after that. And
Real-time data such as images and sounds, and other CDs
-Consider the case of recording the data related to the access time to the ROM, the confirmation of the data to be recorded is a CD-ROM.
It is necessary to perform it in a simulation device that reproduces in the same manner as the state recorded in the above.

From the above, Japanese Patent Laid-Open No. 5-3422
Japanese Patent Laid-Open No. 83-83 discloses that the same state as that recorded in a CD-ROM is stored in a hard disk device (HDD) and a simulation is performed. A conventional CD-ROM reproducing device (hereinafter, also referred to as a CD drive device) generally has a reproducing speed of about 1.4 Mbps, and the minimum unit of reproduced data in this case is 7 sectors.
It is transferred every 1/5 second. Therefore, even in the simulation apparatus, the reproduction cycle of the CD-ROM can be synchronized by setting the communication cycle of the general-purpose computer and the interface to 1/75 second and operating, and the simulation apparatus of the CD drive apparatus is configured. can do.

[0004]

The current CD drive device has been increased in speed to 2 or 4 times speed, and a similar processing capacity is required also in a simulation device composed of a general-purpose computer. However, when using the interrupt of a general-purpose computer for communication, the communication cycle must be further reduced to 1/2 or 1/4 of 1 / 75th of a second, but it is difficult to drastically reduce the processing time of the general-purpose computer. It was not possible to realize a CD drive device simulation device. Therefore, an object of the present invention is to provide a simulation device for a 2x speed or 4x speed CD drive device in which the interruption to a general-purpose computer is fixed to the same 1/75 second cycle as in the conventional case.

[0005]

As means for achieving the above object, an information recording medium drive device for reproducing information recorded on an information recording medium in accordance with a control signal supplied from a drive control section is provided. A simulation device of an information recording medium to be simulated, wherein a secondary storage device that divides and stores information recorded on the information recording medium into a plurality of files, and the file stored in the secondary storage device An information processing device for managing and controlling the file, a buffer for temporarily storing the control signal supplied from the drive control unit, and a plurality of the control signals supplied from the buffer. Is valid, and outputs the valid control signal of the earlier supplied one in accordance with the operation timing of the information processing apparatus. A determination unit, a command transmission unit that interprets the contents of the control signal supplied from the determination unit and outputs the control signal to the information processing device, and a data transfer unit that controls output of information output from the information processing device. And a control signal supplied from the drive control section at a higher speed than the operation timing of the information processing apparatus is processed at the operation timing of the information processing apparatus. It is intended to provide a device.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Even in a simulation device for a 2x or 4x speed CD drive device, the load on the general purpose computer is reduced by fixing the interrupt to the general purpose computer to the same 1/75 second cycle as in the conventional case. . It should be noted that the control commands thinned by the buffering and the prioritization that are performed together do not adversely affect the actual simulation operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the information recording medium simulation apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a game machine using a CD-ROM which is an example of an information recording medium. An operation signal output by operating the operation unit 1 such as a keypad is converted into a command (control signal) by the drive control unit 2 to be a drive device (drive device).
3 is supplied. Then, the drive device 3 reads a signal from the mounted CD-ROM according to the supplied command, and supplies the data read from this CD-ROM to the audiovisual processing unit 4. The image and audio signals processed by the video / audio processing unit 4 are supplied to the monitor unit 5 and displayed and output.

FIG. 2 is a block diagram showing an embodiment of the information recording medium simulation apparatus of the present invention. The game machine drive apparatus 3 shown in FIG. Storage device 7 and interface 8
It is a CD simulation device replaced by and. Since the remaining part has the same operation as the structure shown in FIG. 1, the same reference numerals are given.

The secondary storage device 7 is a hard disk in which CD data materials such as moving images, still images, sounds, CG, sound source information, programs, etc., which are normally stored in a CD-ROM, are divided into a plurality of files for storage. It is a device, and the order of files stored in this hard disk device can be changed to the desired C
In order to edit the image in the D-ROM, the general-purpose computer 6 such as a PC-AT compatible machine manages and controls the reproduction data. The interface 8 is incorporated in the system bus of the general-purpose computer 6, and distinguishes this command from a buffer (three-stage buffer) 9 that temporarily stores a command sent from the drive control unit 2 to the drive device 3. Judgment unit 10 and command transmission unit 11 that interprets this command and outputs it to general-purpose computer 6.
And a data transfer unit 12 that controls data transfer of reproduction data output from the general-purpose computer 6.

Then, in order to reduce the load on the general-purpose computer 6 and to realize a simulation device corresponding to the function of the CD drive device of 2 × speed or 4 × speed, data transfer of the command supplied from the drive control unit 2 is performed. With the amount doubled or quadrupled, the communication cycle between the general-purpose computer 6 and the interface 8 is set to the same communication cycle as in the case of 1x speed. About this setting, CD-ROM
A case of a simulation device for simulating a drive device capable of reading from the disk at double speed will be specifically described. The drive device 3 receives a command in a cycle of 1/75 second in the case of normal speed, and receives a command in a cycle of 1/150 in the case of double speed.

Therefore, the operation signal output by operating the operation unit 1 is converted into a command by the drive control unit 2 and supplied to the interface 8 at a cycle of 1/150 second. This command is roughly classified into valid commands such as play, stop, pause, seek, and scan related to the CD operation, and invalid commands that do not require processing (hereinafter referred to as "knop"). Then, since a valid command is issued only when changing the state of the CD, most of the normal commands are nops. Therefore, in the present simulation apparatus, attention is paid to the fact that most of the commands are knots, and the number of commands is halved by preferentially thinning out the knops. As a result, the operation of the double-speed CD-ROM drive device can be simulated with the command interruption to the general-purpose computer fixed to the 1/75 second cycle.

Specifically, as shown in FIG. 3, when a command is supplied to the determination unit 10 of the interface 8 at a cycle of 1/150 second, the first command 1 and the second command 2 are compared. If the command 1 is a knock and the command 2 is a play, the play of the command 2 is executed by the command sending unit 1
It may be sent to the general-purpose computer 6 via 1. Further, the case where valid commands are continuously sent can be solved by providing a save buffer for valid commands before the determination unit 10. Here, a description will be given with reference to FIG. 4 that a three-stage buffer 9 is provided to temporarily store three valid commands so that a maximum of six consecutive commands can be dealt with. In FIG. 4, six valid commands, play 1 to
Play 6 is shown to be sent consecutively, followed by 6 or more knocks.

First, the play 1 is the interface 8 3
When the play 1 is supplied to the stage buffer 9, the play 1 is temporarily stored as it is. And after 1/150 second, play 2 3
When the stage buffer 9 receives the play 1, the play 1 and the play 2 are determined by the determination unit 10, and since both are valid commands, the previously supplied Play 1 is transmitted to the general-purpose computer 6 via the command transmission unit 11. Then, the play 2 is temporarily stored in the three-stage buffer 9 while being erased from the three-stage buffer 9.

Further, when the play 3 is received after 1/150 second, it is not the command interrupt timing to the general-purpose computer 6 of the 1/75 second cycle at this time.
The judgment unit 10 judges only whether it is a knock or not, and plays 3
Is temporarily stored in the three-stage buffer 9 as it is. And
If Play 4 is received 1/150 second later, Play 2,
Play 3 and play 4 are determined by the determination unit 10, the previously supplied Play 2 is transmitted to the command transmission unit 11 and erased from the 3-stage buffer 9, and the Play 4 is temporarily stored in the 3-stage buffer 9 as it is. To be done.

Similarly, the determination unit 10 determines the command to be supplied every 1/150 second, and temporarily stores only the valid command in the three-stage buffer 9, so that the transmission process is reduced to 1 / 75th. Can be done every second. When the knock is received, it is discarded after being judged by the judging unit 10 without being temporarily stored in the three-stage buffer 9, and is transmitted to the command sending unit 11 only when the valid command is no longer accumulated. . Further, regarding the data transfer amount between the general-purpose computer 6 and the data transfer unit 12 of the interface 8 which is set for each command transmission, the DMA counter value in the interface 8 is doubled so that The transfer rate is the same as that of a double speed CD drive.

Further, since it is constructed so that the judgment section 10 makes a judgment by temporarily storing it in the three-stage buffer 9, the transmission time is added by 1/150 second and is delayed, but an actual CD-ROM is used. When reproducing, the state first shifts to the seek state, so if you calculate by including the delay of 1/150 second within the simulated seek time (at least 1/150 second or more exists). Various simulations are possible.

Next, the case where seven consecutive valid commands are generated will be described with reference to FIG. When the three-stage buffer 9 is used, if seven or more consecutive valid commands are received, a command that is missing when transmitted to the command transmission unit 11 occurs. In the case shown in FIG. 5, play 3
Is transmitted to the command transmission unit 11, three valid commands of play 4, play 5, and play 6 are temporarily stored in the three-stage buffer 9, and it becomes impossible to store any more commands. ing. In the case of FIG. 4, there is no problem because the next knock is received, but in this case, since the valid command play 7 is received after 1/150 second, which is not the command interrupt timing, the oldest. The command play 4 is erased, and the next command transmission is play 5.

As described above, in the case where the three-stage buffer 9 cannot be stored and a valid command that is missing occurs,
The solution is to prioritize the oldest valid commands first. This is 150
Even if valid commands are generated one after another at a short interval of one second, the actual CD-ROM read operation takes a long time to seek, so new valid commands are executed before the old valid commands are actually executed. It will move to the command. Therefore, discarding the old valid command does not affect the actual simulation. Further, as described above, in a CD-ROM or the like, a valid command is issued when the state is changed, so most of them are usually nops, and valid commands in succession of 7 or more are rarely issued.

As described above, the simulation apparatus of this embodiment can execute the simulation of the double speed CD-ROM drive by using the general-purpose computer 6 which operates at a period of 1/75 second. Also,
Simulation of 4x speed CD-ROM drive is also 3
By configuring the interface 8 so that the determination is made at the cycle of 1/00 and the temporary storage, the same operation can be realized.

[0020]

Since the simulation apparatus for the information recording medium of the present invention is configured as described above, it is possible to configure the simulation apparatus corresponding to the CD drive apparatus which is accelerated by using a general-purpose computer. As a result, there is an effect that inexpensive verification and debugging and improvement of application software development efficiency can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of a game machine using a CD-ROM.

FIG. 2 is a configuration diagram showing an embodiment of an information recording medium simulation apparatus of the present invention.

FIG. 3 is a block diagram illustrating a processing operation of a determination unit.

FIG. 4 is a diagram for explaining the operation of an embodiment of the information recording medium simulation apparatus of the present invention.

FIG. 5 is a diagram for explaining the operation of an embodiment of the information recording medium simulation apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operation part 2 Drive control part 3 Drive device 4 Video / audio processing part 5 Monitor part 6 Information processing device (general-purpose computer) 7 Secondary storage device 8 Interface 9 Three-stage buffer 10 Judgment part 11 Command sending part 12 Data transfer part

Claims (1)

[Claims] 1. An information recording medium simulation device for simulating an information recording medium driving device for reproducing information recorded on an information recording medium according to a control signal supplied from a drive control section, A secondary storage device that divides and stores information recorded on an information recording medium into a plurality of files, and manages and controls the files in order to edit the files stored in the secondary storage device An information processing device, a buffer for temporarily storing the control signal supplied from the drive control unit, and a determination as to whether or not the plurality of control signals supplied from the buffer are valid, A determination unit that outputs the valid control signal that is supplied first according to the operation timing of the device, and the control signal that is supplied from this determination unit A command transmission unit that interprets contents and outputs the contents to the information processing device, and a data transfer unit that controls output of information output from the information processing device, and the drive control unit operates the information processing device. A simulation apparatus for an information recording medium, characterized in that a control signal supplied at a speed higher than a timing is processed at an operation timing of the information processing apparatus.