JPH06187142A - Data processor - Google Patents

Abstract

PURPOSE:To easily update softwares in a data processor such as a magneto- optical disk device connected to a host computer for processing data or the like for instance. CONSTITUTION:By storing the data of a processing program obtained by reproducing a recording medium in a buffer memory 17, then reloading a reloadable read-only memory 14 with the stored data of the processing program, also tentatively transferring the data of the processing program obtained by reproducing the recording medium to a controller 3, then storing the data of the processing program in a second buffer memory 22 and reloading the reloadable read-only memory 25, the processing program of the read-only memory 14 or 25 is reloaded through the recording medium.

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Fields of Industrial Application Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems (FIG. 1) Action (FIG. 1) Example (1) Overall Configuration (FIG. 1) (2) Rewriting Controller Arm ( 2 to 5) (3) Rewriting firmware of driver (FIG. 6) (4) Effects of the embodiment (5) Other embodiments Effects of the invention

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device,
For example, it can be applied to a magneto-optical disk device connected to a computer or the like.

[0003]

2. Description of the Related Art Conventionally, in this type of magneto-optical disk device, it can be used as an external storage device for various computers. That is, in this type of magneto-optical disk device, it is formed of a controller and a driver, and is connected to the host computer through this controller.

Therefore, in the driver, the servo control circuit, the laser control circuit, the reproduction signal processing circuit, etc. are driven in accordance with firmware stored in the memory circuit, thereby responding to the control data input via the controller. The operation is switched to record the input recording data in a predetermined recording area, reproduce the predetermined recording area, and output the reproduction data to the controller.
In the controller, for example, by communicating with the host computer via a SCSI interface (small computer system interface) and processing various commands output from the host computer in accordance with the controller arm stored in the memory circuit,
When necessary, the driver is driven to record the recording data output from the host computer on the magneto-optical disk, and output the reproduction data to the host computer.

Therefore, in the driver, firmware which is a control program corresponding to the characteristics of the servo control circuit, the laser control circuit, the reproduction signal processing circuit, etc. must be stored in the memory circuit, while in the controller, It is necessary to set the controller arm according to the specifications so as to correspond to the host computer.

Therefore, in the magneto-optical disk device,
At the time of manufacture, the adjustment program is stored in the memory circuit of the controller to adjust the driver, etc., so that the firmware of the driver is updated according to the adjustment result and the servo information etc. is set. There is. Further, when this adjustment work is completed, in the magneto-optical disc device, the memory circuit of the controller is rewritten according to the specifications at the time of factory shipment. As a result, in the manufacturing line of this type of magneto-optical disk device, even if the specifications are different, after adjusting the magneto-optical disk device by the same adjustment work, by setting the controller arm according to the specifications, adjustment work, product It is designed to simplify management and the like.

[0007]

However, in this type of controller firmware and firmware, so-called bugs may be found after shipment. Especially when the host computer is updated and the processing speed is increased, a bug that has not been a problem in the past may be found. In such a case, in the magneto-optical disk device of this type, it is necessary to replace the already stored controller firmware and firmware with the controller firmware and firmware that have undergone the debugging process. In addition, the controller firmware and firmware need to be updated even when new versions are added to upgrade the version.

Particularly in a magneto-optical disk device, it is necessary to update the controller frame and firmware in the place where the magneto-optical disk device is installed, and it would be convenient if the updating operation could be simplified. Conceivable. That is, in the case of updating the controller firmware and firmware in this way, in the magneto-optical disk device, a method of preparing and replacing the memory storing the controller firmware and firmware is generally considered, and in this method, once installed. The magneto-optical disk device must be pulled out from the installation location to pull out the memory mounting board, which eventually complicates the work and may cause a work error.

On the other hand, a method of updating the controller arm and firmware through an interface such as RS-232C may be considered, but in this case, it is necessary to separately arrange a connector for this interface. As a result, the entire structure becomes complicated, and the work for connecting this connector is also required, so the work becomes complicated. Further, when updating the controller firmware and firmware via the interface such as RS-232C in this way, it is conceivable that the software for the memory rewriting process is converted to ROM in advance and mounted on the controller and driver. Also, there is a drawback that the configuration of the driver becomes complicated, and it becomes difficult to update the software for rewriting.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose a data processing device capable of easily updating this type of software.

[0011]

In order to solve such a problem, according to the present invention, a predetermined recording medium 40 is accessed corresponding to write and read control data, and desired recording data is recorded in the recording medium 40. And recording medium 4
A driver 4 for reproducing reproduction data from 0 and a computer 2 are connected to output write and read control data to the driver 4 in response to a write and read command output from the computer 2 and also from the computer 2. And a controller 3 that outputs the input recording data to the driver 4 or outputs the reproduction data to the computer 2, and the controller 3 stores the recording data input from the computer 2 in response to a write command. A buffer memory 17 which outputs to the driver 4 and stores the reproduction data output from the driver 4 in response to the read command and outputs it to the computer 2.
And a rewritable read-only memory circuit 14 for storing the processing program of the controller 3, and the driver 4 rewrites and rewrites the recording medium 40 recording the rewriting processing program in the rewriting mode for rewriting the processing program. The program data is output to the controller 3, and in the rewrite mode, the controller 3 can store the data of the rewriting processing program input through the driver 4 in the buffer memory 17, and then rewrite with the stored data of the rewriting processing program. The read-only memory circuit 14 is rewritten.

Further, in the present invention, a predetermined recording medium 40 is accessed corresponding to the write and read control data, desired recording data is recorded on the recording medium 40, and reproduction data is reproduced from the recording medium 40. Connected to the driver 4 and the computer 2
Outputs write and read control data to the driver 4 in response to write and read commands output from the computer, outputs recording data input from the computer 2 to the driver 4, or outputs reproduced data to the computer 2. And a controller 3 which operates in response to a write command.
A first buffer memory 17 for storing the recording data input from the driver 4 and outputting the same to the driver 4 and storing the reproduction data output from the driver 4 in response to the read command and outputting it to the computer 2; Reference numeral 4 denotes a second buffer memory 22 that temporarily stores the record data input from the controller 3 in response to the write control data, temporarily stores the reproduced data in response to the read control data, and outputs the reproduced data to the controller 3. And a rewritable read-only memory circuit 25 that stores the processing program of the driver 4, and the driver 4 rewrites by replaying the recording medium 40 in which the processing program to be rewritten is recorded in the rewriting mode in which the processing program is rewritten. Is output to the controller 3, and the controller 3 In the modified mode can, driver 4
After the data of the rewriting processing program input through the first buffer memory 17 is stored in the first buffer memory 17, the stored data of the rewriting processing program is output to the driver 4, and the driver 4 is input from the controller 3 in the rewriting mode. After the data of the processing program to be rewritten is stored in the second buffer memory 22, the rewritable read-only memory circuit 25 is rewritten with the stored data of the processing program to be rewritten.

Further, in the present invention, the recording medium 40 is
The data of the processing program to be rewritten by the data format with high redundancy is recorded, and the controller 3 stores the data of the processing program represented by the data format with high redundancy in the rewritable read-only memory circuit 25. The data is converted into a data format and output to the driver 4.

Further, in the present invention, the recording medium 40 is
The identification data is recorded in a predetermined recording area, and the controller 3
Switches the operation mode to the rewrite mode on the basis of the identification data when the recording medium 40 is write-protected.

[0015]

After the data of the processing program obtained by reproducing the recording medium 40 is stored in the buffer memory 17, the rewritable read-only memory circuit 14 is rewritten with the stored data of the processing program. The data of the processing program obtained by reproduction is once transferred to the controller 3 and then transferred to the second buffer memory 2
After being stored in 2, the rewritable read-only memory circuit 25 is rewritten with the stored processing program data, whereby the processing program of the read-only memory circuit 14 or 25 can be rewritten via the recording medium.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) Overall Structure In FIG. 1, reference numeral 1 denotes a magneto-optical disk device, which records and reproduces data on and from the magneto-optical disk in response to a command output from the host computer 2. Here, the magneto-optical disk device 1 is formed of a controller 3 and a driver 4, and the host computer 2 issues a predetermined command to the controller 3 as needed.

In other words, in the host computer 2, an external storage device such as a floppy disk device (FDD) 5 is connected, and the processing procedure stored in the memory circuit 6 is executed by the central processing unit (CPU) 8. The execution file, the processing data, etc. input via the device 5 can be expanded in the system memory 7 and processed. At this time, in the host computer 2, a command is issued to the controller 3 via the SCSI interface circuit (SISC) 9 as required, whereby the operation of the magneto-optical disk device 1 can be switched.

That is, in the host computer 2, when a write command is issued together with data such as a file, the recording data stored in the buffer memory 7 is transferred to the controller 3 so that the recording is performed in a predetermined area of the magneto-optical disk. It is designed to record data. On the other hand, in the host computer 2, when a read command is issued together with data such as a file, the reproduction data input through the SCSI interface circuit 9 is taken into the buffer memory 7 after a lapse of a predetermined period, whereby the magneto-optical Data can be read from a desired area of the disk.

On the other hand, in the controller 3,
SCS the command output from the host computer 2.
It is input to the central processing unit (CPU) 12 via the I interface circuit (SISC) 10. Here, the controller 3 is a random access memory circuit (RAM) 1
3 is set in the work area of the central processing unit 12, and the read-only memory (RO
M) 14 stores a controller arm, and this controller armware is executed by the central processing unit 12. As a result, in the central processing unit 12, the optical disk controller (ODC) 15 and the interface circuit (IF) 16 are driven in response to the command output from the host computer 2, and a binary code is sent via the interface circuit 16. The expressed command and address data are output to the driver 4.

As a result, the controller 3 switches the operation of the driver 4 in response to the command output from the host computer 2. That is, the central processing unit 12 is the host computer 2
When a write command is issued from, the corresponding file is searched, and when recording data is recorded on the magneto-optical disk, the recording data output from the host computer 2 is subsequently stored in the buffer memory 17.

Further, in the central processing unit 12,
An error correction processing circuit (ECC) 18 generates an error correction code for this recording data, and the interface circuit 1
Issue command and address via 6 and driver 4
When the response is obtained from the interface circuit 16, the recording data and the error correction code are output from the interface circuit 16. Thus, the controller 3 can record the recording data output from the host computer 2 in a predetermined area of the magneto-optical disk.

On the other hand, the central processing unit 12 retrieves the corresponding file when the read command is issued from the host computer 2, and when reproducing the magneto-optical disk, the central processing unit 12 makes a predetermined operation via the interface circuit 16. Issue the command and address. Further, in the central processing unit 12, when the reproduction data is output from the driver 4 in response to this command, the reproduction data is transmitted via the interface circuit 16 to the buffer memory 1
7 and the error correction circuit 18 performs error correction processing.

Further, in the central processing unit 12,
This reproduction data is output to the host computer 2 via the SCSI interface circuit 10 at a predetermined timing, so that the controller 3 can reproduce the magneto-optical disk in response to the operation of the host computer 2. There is.

On the other hand, in the driver 4, the command, address, etc. issued by the controller 3 are input via the interface circuit (IF) 20. Here, in the interface circuit 20, the random access memory circuit (RAM) 22 is used as a buffer memory to input / output data to / from the controller 3, whereby a command and an address inputted at a predetermined timing are inputted. The data is transferred to the central processing unit 23.

In the central processing unit 23, a ROM 24 having a mask read-only memory circuit configuration that supports basic commands and communication of the interface circuit 20.
And E ² PROM (electrically erasable programmab
le ROM) 25 and access to the E ² PROM corresponding to the command output from the controller 3.
According to firmware stored in 25, the operation of the mechanical section 26, the servo control circuit 27, etc. is controlled to control the entire operation. That is, in the central processing unit 23, E ²
The servo control circuit 27 is driven based on the servo information stored in the PROM 25, so that in the driver 4, the servo control circuit 27 drives the optical pickup 28 to perform tracking control and focusing control.

Further, in the central processing unit 23,
Control data is sent to the servo control circuit 27 as needed by referring to the address input from the controller 3, whereby the optical pickup 28 is moved to the recording track determined by this address. Central processing unit 23
In (1), when the command to which this address is added is a write command, the operation of the laser control circuit 29 is switched to the recording mode, and subsequently input recording data is sequentially taken into the data modulation circuit 30.

In the data modulation circuit 30, the recording data is modulated in a modulation format suitable for writing on a magneto-optical disk, and then output to a laser control circuit 29 and a modulation magnetic field forming circuit (not shown), which is then output. Thus, in the magneto-optical disk device 1, desired recording data can be recorded in a file or the like designated by the host computer 2. On the other hand, when the command added to the address is a read command, in the central processing unit 23, the operation of the laser control circuit 29 is switched to the reproduction mode, and the reproduction signal output from the optical pickup 28 is processed by the reproduction signal processing. The circuit 31 and the data demodulation circuit 32 demodulate and convert into reproduction data, and the reproduction data is output from the interface circuit 20.

As a result, in the magneto-optical disk device 1, the operation is switched according to the command issued from the host computer 2, and desired data can be recorded / reproduced.

(2) Rewriting of controller arm Here, in the magneto-optical disk device 1, at the time of adjustment, RO
After storing the controller arm for adjustment in M14 and adjusting the servo control circuit 27, etc.
By rewriting the contents of 4, the controller firmware according to the specifications is stored so as to correspond to the host computer 2. Magneto-optical disk device 1
In this case, when rewriting the contents of the ROM 14, a rewritable magneto-optical disk is loaded so that the controller arm can be updated via the rewritable magneto-optical disk according to the specifications.

On the other hand, when the host computer 2 is already connected, the rewritable magneto-optical disk is loaded in the magneto-optical disk device 1 in the same manner as in the ROM.
The contents of 14 can be rewritten so that the controller frame already stored can be updated to the controller frame which has been subjected to the debugging process or the controller frame which has been upgraded.

That is, as shown in FIG. 2, in the rewritable magneto-optical disk 40, the write protect tab 4
1 is slid to form the window 42,
As a result, write protection is set.

As shown in FIG. 3, in the rewritable magneto-optical disk 40, L is located next to the disk management area in which data on the structure of the magneto-optical disk is recorded.
Identification data is recorded in a recording area defined by BA (logical block address) 0, and as the identification data, the data representing the rewritable magneto-optical disk and the recording area of the rewritable data are recorded. There is.

That is, as shown in FIG. 4, in this identification data, ASCII (american standard code) is used.
for information interchange) Character string data is recorded, and first a character string representing the manufacturer name (represented by the symbol ***) is recorded, followed by a character indicating that the controller firmware for rewriting is recorded. Row (CONT
ROLLER UPDATE DISK) and a character string (V145) representing the version are recorded, and an identifier is formed by this. Further, in the identification data, the data of the leading LBA (corresponding to LBNn in FIG. 3) in which the controller arm to be rewritten subsequently is recorded and the data of the controller arm length to be rewritten represented by LBA are recorded. Has been done.

Correspondingly, in the magneto-optical disk 40, the controller frame to be rewritten from LBNn corresponding to the identification data is recorded in the form of binary data according to a predetermined format. As a result, the rewritable magneto-optical disk 40 can identify the magneto-optical disk by reproducing the identification data, and can further detect the recording area of the rewritable firmware. .

In the magneto-optical disk device 1, when the magneto-optical disk is loaded, the processing procedure shown in FIG. 5 is executed,
Thus, it is determined whether or not the writing magneto-optical disk 40 is present. When the writing magneto-optical disk 40 is loaded here, the controller firmware rewriting program stored in the read-only memory 14 is executed. That is, in the magneto-optical disk device 1, the magneto-optical disk 40
When is loaded, by moving from step SP1 to step SP2 and executing a predetermined spin-up operation,
The magneto-optical disk 40 is rotationally driven to rise to a predetermined rotational speed.

Subsequently, in the magneto-optical disk device 1,
In step SP3, the driver 4 reproduces the disk management area of the magneto-optical disk, detects whether the window 42 is open, and outputs the detection result to the controller 3. Here, in the central processing unit 12 of the controller 3, the reproduction result of the disk management area and the window 42
Of the rewritable magneto-optical disk 40 based on the detection result of
If it is determined that the magneto-optical disk is not physically formatted correctly or if the write-protected state is not set here, a negative result is obtained, and the process proceeds to step SP4 and the normal magneto-optical disk is determined. Is executed, the process proceeds to step SP5 in response to a command from the host computer 2 or the like, and the process procedure is completed.

On the other hand, when the magneto-optical disk is properly physically formatted and is set in the write-protected state, in the central processing unit 12,
A command is issued to the driver 4 to reproduce the area of LBA0. In response to this, in the driver 4, this LB
The area of A0 is reproduced, and the reproduced data is reproduced by the controller 3
Then, the central processing unit 12 of the controller 3 determines whether or not it is the write magneto-optical disk 40 on the basis of the identifier composed of the reproduction data.

If a negative result is obtained here, in the central processing unit 12, the process proceeds to step SP4, whereas in the case of the write magneto-optical disk 40, step S4.
Move to P6 and assign "CONTR" to the identifier here.
The controller firmware rewriting program is started in accordance with the character string "ALLER UPDATE DISK". The controller firmware rewriting program is stored in advance in the read-only memory 14, and the central processing unit 12 follows the controller firmware rewriting program to proceed to step SP7 and to the read-only memory 14 already. The stored version of the controller arm is compared with the version assigned to the identifier of the magneto-optical disc 40.

If the version assigned to the identifier is older than the version of the controller arm already stored in the read-only memory 14, the central processing unit 12 moves to step SP8 and issues a command to the driver 4. After ejecting the magneto-optical disc 40, the process proceeds to step SP5. As a result, in the magneto-optical disc device 1, the rewriting processing procedure is executed only for necessary firmware.

On the other hand, the read-only memory 14 has already been
If the version assigned to the identifier is newer than the version stored in the controller arm, a positive result is obtained in step SP7, and in the central processing unit 12, the process moves to step SP9 and the first data assigned to the identification data. A command and address data is issued to the driver 4 based on the LBA data and the controller arm length data. As a result, in the central processing unit 12, the firmware for rewriting is sequentially reproduced, and as a result, the data of this firmware that is sequentially input from the driver 4 is stored in the buffer memory 17.
To store.

When the firmware data is stored in the buffer memory 17 in this way, the central processing unit 1
In step 2, the process proceeds to step SP10 to issue a command to the driver 3 to eject the magneto-optical disk 40, so that the magneto-optical disk device 1 does not repeat the rewriting process after the controller arm has been rewritten. Has been done. Then the central processing unit 1
In step 2, the process proceeds to step SP11, in which the checksum of the firmware data stored in the buffer memory 17 is inspected, and it is detected whether or not the data can be reproduced correctly. If an error is detected, step SP11 is selected.
Moving to step 5, the rewriting process is stopped. As a result, in the magneto-optical disk device 1, this operation can be repeated as necessary to reliably update the controller arm.

On the other hand, when a positive result is obtained in step SP11, the central processing unit 12 shifts to step SP12, where the read-only memory rewriting program stored in the read-only memory 14 is transferred to the RAM 13, This read-only memory rewriting program is started up in place of the controller firmware rewriting program.

As a result, in the central processing unit 12, in the subsequent step SP13, the controller software stored in the read-only memory 14 is rewritten into the controller software stored in the buffer memory 17 according to the algorithm of the rewriting program. The newly updated controller software includes a controller firmware rewrite program and a read-only memory rewrite program. In the magneto-optical disk device 1, when the controller software is updated, the controller software is stored in the read-only memory 14 until then. The controller firmware rewriting program and the read only memory rewriting program are also updated at the same time. As a result, in the magneto-optical disk device 1, the controller arm updating process can be repeated many times as necessary.

When the controller software is rewritten in this way, in the central processing unit 12, the process proceeds to step SP14, and after resetting according to the read-only memory rewriting program, the control target is switched to the read-only memory 14. , Step SP5 to complete the procedure.

Thus, by updating the controller arm via the magneto-optical disk 40, the controller arm can be easily updated with the host computer 2 connected without pulling out the mounting board of the read-only memory 14. Therefore, the controller arm can be updated simply and surely. Therefore, the controller arm can be easily updated by a non-specialized operator corresponding to the update of the host computer 2 and the usability of the spectroscopic magnetic disk device 1 can be improved.

Particularly, in the host computer to which the magneto-optical disk device 1 of this kind is connected, the input means may not be connected to the host computer side, and thus the controller arm is updated via the magneto-optical disk 40. By doing so, even when connected to such a host computer, the controller arm can be easily updated. It can also be applied at the time of factory shipment to easily set firmware for each specification.

In particular, if the controller arm is updated via the magneto-optical disk as described above, the controller arm can be easily updated on the user side by releasing the rewriting program, and accordingly, the usability is improved. Can be improved.

(3) Rewriting the firmware of the driver Further, in the magneto-optical disk device 1, when adjusting the servo control circuit 27 and the like in the adjustment process, E ² PRO
By updating a part of firmware stored in M25, servo information and the like are stored in this E ² PROM 25, and thereby the servo control circuit 27 and the like are set to desired characteristics.

In the magneto-optical disk device 1, as in the case of the controller frame, by mounting the magneto-optical disk for rewriting the firmware of the drive,
The firmware stored in the E ² PROM 25 can be rewritten so that the firmware can be easily updated in the adjustment process, and the firmware can be updated while being connected to the host computer 2. Has been done.

Here, in the firmware rewriting magneto-optical disk of the drive used for rewriting,
As in the case of the controller arm, the write protect tab 41 is slid to set write protection, a disk management area is further formed, and identification data and firmware to be rewritten are recorded.

Among them, in the identification data, as in the magneto-optical disk for rewriting the controller arm, A
After the character string representing the manufacturer name is recorded in the form of SCI character string, the character string indicating that the firmware for rewriting the drive is subsequently recorded (DRIVE FI
RM), the character string of the version is recorded, and the identifier is formed by this. Further, in the identification data, the data of the first LBA in which the firmware to be rewritten and the rewriting execution program are subsequently recorded, and the data of the firmware to be rewritten and the length of the rewriting execution program represented by LBA are recorded. There is.

Correspondingly, in the drive firmware rewriting magneto-optical disk 40 of the drive, firmware data to be rewritten and a rewriting execution program are recorded corresponding to the identification data, and thereby the identification data is reproduced. The magneto-optical disk of the lever can be discriminated, and the magneto-optical disk for rewriting of the controller firmware and the magneto-optical disk for rewriting of firmware of the drive can be discriminated.

Further, in the magneto-optical disk 40, of the firmware data to be rewritten, a data format having a high degree of redundancy in which address data and a checksum are added (in this case, intel intellec 8 / MDS)
It is recorded in the format), so that the firmware can be surely rewritten by this, whereas the rewriting execution program is recorded in binary code.

In the magneto-optical disk device 1, when the magneto-optical disk 40 is loaded, the processing procedure shown in FIG. 6 is executed, whereby it is judged whether or not it is the optical disk 40 for rewriting firmware of the drive. When the firmware rewriting magneto-optical disc 40 of the drive is loaded, the firmware rewriting program stored in the read-only memory 14 is started. That is, in the magneto-optical disk device 1, the magneto-optical disk 4
When 0 is loaded, step SP21 to step SP
At 22, the spin-up operation is executed to raise the rotation speed of the magneto-optical disk 40 to a predetermined rotation speed.

Further, in the magneto-optical disk device 1,
In the subsequent step SP23, the disc management area of the magneto-optical disc is reproduced, and it is detected whether the window 42 is open or not, and the detection result is output to the controller 3. Here, in the central processing unit 12 of the controller 3, it is judged whether or not it is the rewritable magneto-optical disk 40 based on the reproduction result of the disk management area and the detection result of the window 42. Here, the magneto-optical disk is correctly formed in the physical format. If not, or if it is not set to the write-protected state, a negative result is obtained, so that the process proceeds to step SP24, where after the process for the normal magneto-optical disk is executed, the command for the host computer 2 etc. is sent. Correspondingly, the process proceeds to step SP25 to complete the processing procedure.

On the other hand, when the magneto-optical disk is correctly physically formatted and is set in the write-protected state, in the central processing unit 12,
A command is issued to the driver 4 to reproduce the area of LBA0. In response to this, in the driver 4, this LB
The reproduction data obtained from the area A0 is output to the controller 3, and the central processing unit 12 of the controller 3 judges whether or not it is the firmware rewritable magneto-optical disk 40 of the driver based on the identifier of the reproduction data. .

If a negative result is obtained here, in the central processing unit 12, the process proceeds to step SP24, whereas in the case of the driver firmware rewritable magneto-optical disk 40, the process proceeds to step SP26, where it is assigned to an identifier. The firmware rewriting program of the read-only memory 14 is started according to the character string of "DRIVE FIRM". In accordance with this firmware rewriting program, the central processing unit 12 then proceeds to step SP27 to compare the firmware version already stored in the E ² PROM 25 with the version assigned to the identifier of the magneto-optical disk 40. To do.

If the version assigned to the identifier is older than the version of firmware stored in the E ² PROM 25, the central processing unit 12 moves to step SP28 and issues a command to the driver 4 to issue an optical signal. After ejecting the magnetic disk 40, the process moves to step SP25, whereby the magneto-optical disk device 1 executes the rewriting procedure only for necessary firmware.

On the other hand, if the version assigned to the identifier is newer than the version of firmware that is already stored in the E ² PROM 25, step SP27.
A positive result is obtained at step S29, and the central processing unit 12 proceeds to step SP29 where the command and address data are sent to the driver 4 based on the data of the first LBA assigned to the identification data and the data of the firmware. To issue. This allows the central processing unit 1
In 2, the rewriting execution program data recorded in the magneto-optical disk 40 is sequentially reproduced, and as a result, the rewriting execution program data sequentially input from the driver 4 is stored in the buffer memory 17.

In this rewriting execution program, the total number of bytes and the checksum are allocated to the header section and recorded in the magneto-optical disk, and the central processing unit 1
In No. 2, when the rewrite execution program is stored in the buffer memory 17, the checksum is inspected to determine whether or not the rewrite execution program can be correctly reproduced. This allows the central processing unit 12
In (1), if the rewriting execution program cannot be correctly reproduced, the magneto-optical disk 40 is ejected, and thereby the firmware can be surely updated.

On the other hand, if the execution program can be reproduced correctly, the central processing unit 12 moves to step SP30 and transfers the rewriting execution program stored in the buffer memory 17 to the RAM 13. Subsequently, the central processing unit 12 shifts to step SP31, issues a command and an address to the driver 4 based on the LBA data recorded in the identification data, whereby the firmware data to be rewritten from the magneto-optical disk 40 is written. It is reproduced and stored in the buffer memory 17.

When the firmware data is stored in the buffer memory 17 in this way, the central processing unit 1
In step 2, the process moves to step SP32 to issue a command to the driver 4 to eject the magneto-optical disk 40, so that the magneto-optical disk device 1 does not repeat the rewriting process after the firmware rewriting is completed. Has been done. Then, in the central processing unit 12, the process proceeds to step SP33, where the control target is R
The mode is switched to AM13, and thereby the drive arm rewriting execution program is started.

As a result, the central processing unit 12 proceeds to step SP34, issues a command to the driver 4 according to this rewriting execution program, and switches the control target of the central processing unit 23 to the ROM 24. As a result, the driver 4 uses the communication and basic commands supported by the ROM 24 to generate the E ² P.
The firmware stored in the ROM 25 is updated.

That is, in the central processing unit 12, the driver 4 is then driven according to the rewriting execution program.
Command is issued to set the E ² PROM 25 in a rewritable state, and then necessary areas of the E ² PROM 25 are sequentially rewritten. In the rewriting of the E ² PROM 25, the central processing unit 12 reads one line of the drive code stored in the buffer memory 17 according to the rewriting execution program and converts it into a binary string, and thereafter, the address data and the number of data bytes of this binary string. The checksum is obtained in the form of binary data, the checksum is checked, and the range of address data, the end of data, etc. are confirmed.

That is, in the case of this embodiment, the data of firmware is recorded according to a predetermined data format having high redundancy with address data and a checksum added, and in the central processing unit 12, One line of this drive code is read and data is sequentially converted. Central processing unit 1
In No. 2, when the binary string is confirmed in this way, a command is issued to the driver 4, the transfer destination address is stored in the RAM 22, and then the data string converted into binary data is sequentially transferred. As a result, in the central processing unit 12, after storing this data string in the RAM 22, the address of the rewriting destination E ² PROM 25 is transferred and a write command with a byte count is issued to the driver 4.

As a result, in the central processing unit 23, the designated area of the E ² PROM 25 is sequentially rewritten with the data string stored in the RAM 22, whereby the firmware is updated only for the necessary data in the magneto-optical disk device 1. It is designed to do.

In practice, the firmware stored in the E ² PROM 25 has different characteristics for each magneto-optical disk device 1 since it also includes servo information. Therefore, in this embodiment, the E ² PROM 25 is used.
By rewriting only a necessary area of firmware stored in the above, the valuable information which is different for each magneto-optical disk device 1 of this kind is retained as it is. When the transfer of this data string is completed, the central processing unit 12 subsequently issues a verify command to the driver 4 to determine whether or not the data could be rewritten correctly.

If the data cannot be rewritten correctly, the central processing unit 12 repeats the data conversion / transfer processing, whereas if the data can be rewritten correctly, the data conversion / transfer processing for the subsequent data in the buffer memory 17 is performed. repeat. As a result, in the magneto-optical disk device 1, the firmware is input from the magneto-optical disk 40 to update the E ² PROM 25, and the firmware can be updated easily and surely for the driver.

This transferred data string is stored in the E ² PROM ²
When recording in 5, in the central processing unit 23, E
^{2 The} checksum is checked on the PROM 25. Therefore, in this embodiment, the checksum data is added to the data required for updating firmware, and the data is transferred.
In, the firmware is surely updated. In the central processing unit 12, when the data conversion and transfer processing is completed for all the data in the buffer memory 17, a command is sent to the driver 4 to reset the central processing unit 23, and then step S
Then, the process goes to P25 to complete this procedure.

Thus, by updating the firmware via the magneto-optical disk 40, the firmware can be updated easily and surely for the driver as in the case of the controller, and the host computer 2 can be updated. The firmware can be updated by the user, and the firmware can be easily updated by the user as needed, and the usability of the spectroscopic magnetic disk device 1 can be improved.

(4) Effects of the Embodiments According to the above configuration, the firmware of the controller 3 and the driver 4 is updated via the magneto-optical disk, so that the controller firmware can be easily pulled out without individually pulling out the mounting board. The controller arm can be updated easily and surely. As a result, the firmware can be updated in response to the update of the host computer 2, and the firmware can be easily updated by the user if necessary, and the usability of the spectroscopic magnetic disk device 1 can be improved. it can.

(5) Other Embodiments In the above embodiment, the flash ROM is used in the controller and the E ² PROM is used in the driver.
I described the case of storing the program using
The present invention is not limited to this, and conversely, the controller and the driver may store the programs by using the E ² PROM and the flash ROM, respectively, and further, instead of this, various rewritable read-only memories may be stored. May be widely applied. In this case, in the driver, the servo information is temporarily saved in the controller or the like, so that the program can be updated without damaging valuable information that is different for each magneto-optical disk device.

Further, in the above-described embodiment, the case where the rewritable magneto-optical disk is set to the rewritable prohibition is used, but the present invention is not limited to this, and the rewritable prohibition setting may be omitted. Good.

Further, in the above embodiment, LBA0
Although the case where the identification data is recorded in the area is described, the present invention is not limited to this, and the identification data can be recorded in various areas as necessary.

Further, in the above-mentioned embodiment, the case where the start position and the length of the firmware are assigned to the identification data and recorded is described. However, the present invention is not limited to this, and this information may be omitted to preliminarily. You may make it record on the set predetermined recording area.

Further, in the above-mentioned embodiment, the case where the firmware data is recorded in accordance with the predetermined format to which the address data and the checksum are added has been described, but the present invention is not limited to this and, for example, binary data, Various data formats can be widely applied as needed.

Further, in the above embodiment, LBA0
The case of discriminating the rewritable magneto-optical disk on the basis of the identification data recorded in the area is described, but the present invention is not limited to this, and the identification data may be recorded in the data management area. Alternatively, it may be recorded in an area or the like allocated for testing.

Further, in the above-described embodiment, the case where the identifier and the data in the recording area are recorded as the identification data has been described, but the present invention is not limited to this, and, for example, a version of old firmware to be rewritten can be used. It can be widely applied when recording and processing by judging whether or not it is necessary to rewrite with reference to this version, and when recording various data as necessary and improving usability. .

Further, in the above-mentioned embodiment, the case where the controller and the driver are controlled by the individual central processing units has been described, but the present invention is not limited to this, and is widely applicable to the case where they are controlled by one central processing unit. Can be applied.

Further, in the above-mentioned embodiment, the case where the rewriting program is updated at the same time when the controller arm is updated has been described. However, the present invention is not limited to this, and the rewriting program needs to be stored in a mask ROM or the like. You may make it update only a program.

Further, in the above-mentioned embodiments, the case where the present invention is applied to the magneto-optical disk device to update the control program has been described. However, the present invention is not limited to this, and data processing for recording and reproducing desired data. It can be widely applied to devices.

[0083]

As described above, according to the present invention, after the data of the processing program input through the recording medium is stored in the buffer memory, the rewritable read of the controller or the driver is performed by the stored processing program data. By rewriting the only memory circuit, the processing program of the controller or the driver can be rewritten only by mounting the magneto-optical disk, and thus a data processing device capable of easily updating this kind of software can be obtained. .

[Brief description of drawings]

FIG. 1 is a block diagram showing a magneto-optical disk device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the magneto-optical disk.

FIG. 3 is a schematic diagram showing the structure.

FIG. 4 is a schematic diagram showing identification data.

FIG. 5 is a flowchart for explaining rewriting of the controller arm.

FIG. 6 is a flowchart for explaining the rewriting of firmware of the driver.

[Explanation of symbols]

1 ... Magneto-optical disk device, 2 ... Host computer, 3 ... Controller, 4 ... Driver, 5 ... Floppy disk device, 8, 12, 23 ... Central processing unit, 10 ... SCSI interface circuit, 13 Two
2 ... Random access memory, 14, 24 ... Read-only memory, 17 ... Buffer memory, 25 ... E ²
PROM.

Claims (4)

[Claims] 1. A driver for accessing a predetermined recording medium corresponding to write and read control data, recording desired recording data on the recording medium, and reproducing reproduced data from the recording medium, and a computer. Connected to, and outputs the write and read control data to the driver in response to the write and read commands output from the computer, and outputs the recording data input from the computer to the driver, Or a controller for outputting the reproduction data to the computer, wherein the controller stores the recording data input from the computer in response to the writing command, outputs the recording data to the driver, and outputs the reading command. The playback data output from the above driver corresponding to And a rewritable read-only memory circuit that stores the processing program of the controller, the driver stores the processing program to be rewritten in the rewriting mode in which the processing program is rewritten. The recorded recording medium is reproduced to output the data of the rewriting processing program to the controller, and the controller stores the data of the rewriting processing program input through the driver in the buffer memory in the rewriting mode. After that, the rewritable read-only memory circuit is rewritten with the stored data of the rewriting processing program. 2. A driver for accessing a predetermined recording medium corresponding to write and read control data, recording desired recording data on the recording medium, and reproducing reproduced data from the recording medium, and a computer. Connected to, and outputs the write and read control data to the driver in response to the write and read commands output from the computer, and outputs the recording data input from the computer to the driver, Or a controller for outputting the reproduction data to the computer, wherein the controller stores the recording data input from the computer in response to the writing command, outputs the recording data to the driver, and outputs the reading command. The playback data output from the above driver corresponding to A first buffer memory that stores the data and outputs the data to the computer. The driver temporarily stores the recording data input from the controller in correspondence with the control data for the writing, and the control data for the reading. Corresponding to, the second buffer memory for temporarily storing the reproduction data and outputting it to the controller, and a rewritable read-only memory circuit for storing the processing program of the driver. In the rewriting mode in which the rewriting processing program is rewritten, the recording medium in which the rewriting processing program is recorded is output to output the data of the rewriting processing program to the controller, and the controller inputs the data via the driver in the rewriting mode. Rewriting process professional RAM data is stored in the first buffer memory, and then the stored rewriting processing program data is output to the driver, and the driver outputs the rewriting processing program input from the controller in the rewriting mode. A data processing device, characterized in that after the data is stored in the second buffer memory, the rewritable read-only memory circuit is rewritten with the stored data of the rewriting processing program. 3. The recording medium records the data of the rewriting processing program in a data format having a high redundancy, and the controller records the data of the rewriting processing program expressed in the data format having a high redundancy. 3. The data processing device according to claim 2, wherein the data format is converted into a data format to be stored in the rewritable read-only memory circuit and output to the driver. 4. The recording medium records identification data in a predetermined recording area, and when the recording medium is write-protected, the controller rewrites the operation mode based on the identification data. The data processing device according to claim 1, wherein the data processing device is switched to a mode.