JPH06187141A - 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 inputting the data of a processing program through an input/output circuit 10 connected to a computer 2, storing them in a buffer memory 17, then reloading a reloadable read-only memory 14 with the stored data of the processing program, also storing the data of the processing program inputted from the connection line of the computer 2 through a controller 3 in a second buffer memory 22 and reloading the reloadable read-only memory 25 with the stored data of the processing program, the processing program of the controller 3 or a driver 4 is reloaded through the connection line of the computer 2.

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Field 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) (3) Rewriting firmware of driver (FIG. 3) (4) Effect of embodiment (5) Other embodiment Effect of 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 or the like connected to a computer.

[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, in the present invention, a predetermined recording medium is accessed corresponding to write and read control data, and desired recording data is recorded in the recording medium. And a driver 4 for reproducing reproduced data from a recording medium, and connected to the computer 2 to output write / read control data to the driver 4 in response to write / read commands output from the computer 2, and Two
A controller 3 for outputting the recording data input from the device to the driver 4 or outputting the reproduction data to the computer 2.
The controller 3 includes an input / output circuit 10 connected to the computer 2 for inputting recording data and outputting reproduction data, and a recording input via the input / output circuit 10 in response to a write command. The data is stored and output to the driver 4, and the reproduction data output from the driver 4 in response to the read command is stored and the input / output circuit 1
It has a buffer memory 17 for outputting to 0 and a rewritable read-only memory circuit 14 for storing the processing program of the controller 3, and the controller 3 is inputted via the input / output circuit 10 in the rewriting mode for rewriting the processing program. After the data of the processing program to be stored is stored in the buffer memory 17, the rewritable read-only memory circuit 14 is rewritten with the stored data of the processing program.

Further, according to the second aspect of the invention, a predetermined recording medium is accessed corresponding to the write and read control data, desired recording data is recorded on the recording medium, and reproduction data is reproduced from the recording medium. The controller 4 is connected to the driver 4 and the computer 2, and outputs write and read control data to the driver 4 in response to write and read commands output from the computer 2 and also outputs recording data input from the computer 2 to the driver. 4 or a controller 3 for outputting reproduction data to the computer 2, the controller 3 being connected to the computer 2 for inputting recording data and outputting reproduction data. , The recording data input via the first input / output circuit 10 in response to the write command. And a first buffer memory 17 for storing the reproduction data output from the driver 4 in response to a read command and outputting it to the first input / output circuit 10. A second input / output circuit 20 connected to the controller 3 inputs the recording data output from the controller 3 and outputs reproduction data to the controller 3, and a second input / output circuit 20 corresponding to the write control data. The recording data input via the input / output circuit 20 of FIG.
0 to the second buffer memory 22 and the driver 4
And a rewritable read-only memory circuit 25 for storing the processing program, the controller 3 stores the data of the processing program input via the first input / output circuit 10 in the rewriting mode for rewriting the processing program. 1 to the driver 4 via the buffer memory 17, and the driver 4 outputs the second memory in the rewriting mode.
After storing the data of the processing program input through the input / output circuit 20 in the second buffer memory 22, the rewritable read-only memory circuit 25 is rewritten with the stored data of the processing program.

Further, in the present invention, the controller 3
Converts the data of the processing program input in the data format having high redundancy into a data format to be stored in the rewritable read-only memory circuit 25 and outputs the data format to the driver 4.

[0014]

After the data of the processing program input via the input / output circuit 10 is stored in the buffer memory 17, the rewritable read-only memory circuit 14 is rewritten with the stored data of the processing program. Data of the processing program input from the controller 3 via the input / output circuit 20 is transferred to the second buffer memory 2
2, the rewritable read-only memory circuit 25 is rewritten with the stored processing program data, so that the processing program of the read-only memory circuit 14 or 25 can be rewritten via the connection line of the computer 2. .

[0015]

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 / reproduces information on / 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.

That is, 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 so that the floppy disk device is executed. 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 subsequently transferred to the controller 3, whereby this 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 here, 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. Further, in the magneto-optical disk device 1, when rewriting the contents of the ROM 14, a predetermined writing device 35 corresponding to the host computer 2 is connected to the SCSI interface circuit 10.
As a result, the floppy disk corresponding to the specifications can be loaded into the floppy disk device 5 to update the controller arm.

On the other hand, when the host computer 2 is already connected, the magneto-optical disk device 1 similarly rewrites the contents of the ROM 14 via the SCSI interface circuit 10 so that a predetermined floppy disk can be transferred to the host computer. The controller arm already loaded and stored in the second floppy disk device 5 can be replaced with the controller arm which has been subjected to the debugging processing or the controller arm which has been upgraded.

That is, as shown in FIG. 2, in this rewriting, the central processing unit 8 of the host computer 2 or the writing device 35 makes the floppy disk device 5 SCS.
When the floppy disk storing the I control program is loaded, the operation moves from step SP1 to step SP2 to activate this SCSI control program. This SCSI control program is a processing program for updating the controller arm, and in the central processing unit 8, the two areas of the read buffer and the write buffer are secured in the system memory 7 and stored in the floppy disk in step SP3 following the processing program. Transfer the controller controller to this light buffer.

Subsequently, in the central processing unit 8, the process proceeds to step SP4 and the SCSI interface circuit 1
A command is issued to the controller 3 via 0, thereby setting the controller 3 in the control arm rewriting mode. Further, in the central processing unit 8, subsequently, a command is issued to the controller 3 via the SCSI interface circuit 10, and then the controller software stored in the system memory 7 is executed by the controller 3
The controller software is stored in the buffer memory 17 of the controller 3.

At this time, the central processing unit 12 inspects the checksum added to the controller software so that the controller software can be correctly transferred in the magneto-optical disk device 1. When this transfer is complete, the central processing unit 8
In (1), a command is issued to the controller 3 according to the SCSI control program, the rewriting program stored in the ROM 14 is transferred to the RAM 13, and the controller 3 starts up the rewriting program for the controller firmware.

As a result, in the central processing unit 12, in the subsequent step SP6, the controller software stored in the ROM 14 is rewritten to the controller software stored in the buffer memory 17 according to the algorithm of the rewriting program. It should be noted that the controller software to be newly updated includes a controller firmware rewriting program, and the magneto-optical disk device 1 has a ROM until the controller software is updated.
The rewriting program stored in 14 is 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 manner, the central processing unit 12 then proceeds to step SP7, resets the program according to the rewriting program, and then switches the control target to the ROM 14 to update it. Execute the following processing according to the controller software. That is, the central processing unit 12 proceeds to step SP8, where a response command is issued to the host computer 2 according to the controller software, and when the central processing unit 8 receives this command, it follows the SCSI control program. A command is issued to the controller 3 to switch the operation mode of the controller 3 to the read mode of the ROM 14.

As a result, in the central processing unit 12, the rewritten controller software is transferred to the buffer memory 17 and then sequentially transferred to the host computer 2. Correspondingly, in the central processing unit 8,
This transferred controller software is used in the system memory 7
After the data is stored in the lead buffer of step S9, the process proceeds to step SP9. Here, the central processing unit 8 sequentially compares the controller software stored in the read buffer and the controller software stored in the write buffer in byte units according to the SCSI control program, displays the comparison result on a predetermined display device, and then executes step SP10. To complete the procedure.

Thus, the operator can judge whether or not the controller arm can be correctly updated based on the comparison result, and by doing this, the controller arm can be surely updated by repeating this processing procedure as necessary. You can Further, at this time, in the magneto-optical disk device 1, the checksum is inspected in the central processing unit 12, so that the controller arm can be updated more surely in the magneto-optical disk device 1.

Thus, the SCSI interface circuit 10 in which the host computer 2 and the writing device 35 are connected.
By updating the controller arm via
The controller arm can be easily updated without pulling out the mounting board of the ROM 14, and the controller arm can be easily and surely updated accordingly. Therefore, the controller arm can be updated corresponding to the update of the host computer 2 and the usability of the spectroscopic magnetic disk device 1 can be improved.

In particular, if the controller arm is updated via the SCSI interface circuit 10 as described above,
By releasing this SCSI control program and the like, the user can easily update the controller arm as needed, and the usability can be improved accordingly.

(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 arm, the host computer 2
After connecting a predetermined writing device 35 corresponding to the above to the SCSI interface circuit 10, a predetermined floppy disk is loaded into the floppy disk device 5, and when the host computer 2 is already connected, this floppy disk is loaded into the floppy disk device 5. By doing so, the firmware can be updated to the firmware that has been subjected to the debugging processing or the firmware that has been upgraded.

That is, as shown in FIG. 3, in this rewriting, when the central processing unit 8 of the host computer 2 or the writing device 35 is loaded into the floppy disk device 5, the floppy disk storing the firmware control SCSI control program is loaded into the step unit. SP1
The process moves from step 1 to step SP12, and this SCSI control program is activated. Then the central processing unit 8
In accordance with the SCSI control program, the rewriting program stored in the floppy disk is transferred to the system memory 7 in the subsequent step SP13,
Move to step SP14.

In the central processing unit 8, S
A command is issued to the controller 3 via the CSI interface circuit 10, the rewriting program stored in the system memory 7 is transferred to the controller 3, and the rewriting program is stored in the buffer memory 17 of the controller 3. Subsequently, the central processing unit 8 moves to step SP15, and the SCSI interface circuit 1
A command is issued to the controller 3 via 0, whereby the rewriting program stored in the buffer memory 17 is transferred to the RAM 13.

As a result, in the central processing unit 8, the controller firmware rewriting program is stored in the work area of the controller 3, and the controller 3 can execute the subsequent processing in accordance with the rewriting program. In the central processing unit 12, when the rewriting program is transferred to the RAM 13, the checksum added to the rewriting program is inspected so that the rewriting program can be correctly transferred.

When this transfer is completed, the central processing unit 8 transfers the drive arm formatted in a predetermined format in accordance with the SCSI control program from the floppy disk to the system memory 7.
In the central processing unit 8, in this series of processing, the processing procedure is displayed on a predetermined display device and the processing is sequentially performed according to the operation of the operator, whereby the file name and the like can be input interactively. The drive arm update process can be executed.

At the next step SP17, the central processing unit 8 issues a command to the controller 3 via the SCSI interface circuit 10, and then transfers the drive arm stored in the system memory 7 to the controller 3, thereby The drive arm is stored in the buffer memory 17 of the controller 3. Then, in the central processing unit 8, the process proceeds to step SP18, where a command is issued to the controller 3 to switch the control target of the central processing unit 12 to the RAM 13, thereby starting the rewriting program of the drive arm.

Thus, in the central processing unit 12, after executing the initialization processing, a command is issued to the driver 4 according to the rewriting program, and the control target of the central processing unit 23 is switched 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 PROM ²
The firmware stored in 5 is updated.

Subsequently, in the central processing unit 12,
In step SP19, a command is issued to the driver 4 according to the rewriting program 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 this case, the firmware data to be rewritten is recorded in a data format having high redundancy with address data and a checksum (in this case, an intelintellec 8 / MDS format, which is code 83). In the magneto-optical disk device 1, firmware is surely rewritable, whereas a rewriting program or the like is recorded in binary code. As a result, in the central processing unit 12, the buffer memory 1 is read according to the rewriting program.
After reading one line of the drive code stored in 7 and converting it to a binary string, the checksum of the address data and the number of data bytes of this binary string is obtained in the form of binary data, and the checksum is checked and the range of the address data The end of data is confirmed.

Further, in the central processing unit 12,
If you check the binary string in this way, the driver 4
Command is issued to the RAM 22 to set the transfer destination address 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 this data string is once stored in the RAM 22,
Then, 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 rewritten with the data string stored in the RAM 22.

In fact, 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 the required area of firmware stored in the above, valuable information different for each magneto-optical disk device 1 of this kind is retained as it is and only necessary data is rewritten. 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 SCSI interface circuit 10
E ² in Fuamu Wear input through the PROM25
The firmware is updated so that 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, it is designed to be able to update the firmware even more reliably. In the central processing unit 12, for all the data in the buffer memory 17,
When the data conversion / transfer processing is completed, the operation completion data is sent to the host computer 2, whereby the magneto-optical disk apparatus 1 moves to step SP20 to complete this processing procedure.

Thus, the SCSI interface circuit 1
By updating firmware via 0, the firmware can be updated easily and surely for the driver as well, and firmware can be updated corresponding to the update of the host computer 2, etc. Accordingly, firmware can be easily updated, and the usability of the spectroscopic magnetic disk device 1 can be improved.

(4) Effects of the Embodiments According to the above configuration, the SCSI interface circuit 1
By updating firmware of the controller 3 and the driver 4 via 0, the controller firmware can be easily updated without pulling out the mounting board one by one, and the controller firmware can be updated easily and surely. You can 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 program by using the E ² PROM 25 and the flash ROM, respectively. Alternatively, various rewritable read-only memories may be widely used. You may apply. In this case, in the driver
By temporarily saving the servo information to the controller or the like, the program can be updated without damaging valuable information that differs for each magneto-optical disk device.

Further, in the above embodiment, the case where the rewriting software is supplied via the floppy disk has been described, but the present invention is not limited to this, and a hard disk device which is an external storage device of the host computer, and further separately. Rewriting software may be supplied via the provided magneto-optical disk device, or may be supplied using a communication line.

Further, in the above-mentioned embodiment, the case where desired data is input / output to / from the host computer via the SCSI interface has been described, but the present invention is not limited to this, and for example, ISA, EISA, etc. It can be widely applied to the case of inputting / outputting data via various interfaces.

Further, in the above-mentioned embodiments, the case where the controller and the driver are controlled by the individual central processing units has been described. However, 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 embodiment, the case where the rewriting program is updated at the same time when the controller arm is updated has been described, but the present invention is not limited to this, and the rewriting program is required to be stored in the mask ROM or the like. You may make it update only a program.

Further, in the above-mentioned embodiment, the case where the present invention is applied to the magneto-optical disk device to update the control program has been described. It can be widely applied to devices.

[0062]

As described above, according to the present invention, after the data of the processing program input through the input / output circuit of the recording data and the reproduction data is stored in the buffer memory, it is rewritten with the data of the stored processing program. By rewriting the possible read-only memory circuit, or after storing the data of the processing program input from the controller through the input / output circuit of the recording data and the reproduction data in a predetermined buffer memory, the stored processing program data is used. By rewriting the rewritable read-only memory circuit, the processing programs of the controller and the driver can be rewritten via the connection line with the host computer, whereby this kind of software can be easily updated. 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 flowchart for explaining the rewriting of the controller arm.

FIG. 3 is a flowchart for explaining 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 (3)

[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, Alternatively, the controller includes a controller for outputting the reproduction data to the computer, the controller corresponding to the input / output circuit connected to the computer for inputting the recording data and outputting the reproduction data, and the write command. The recorded data input via the input / output circuit. A buffer memory that stores the data and outputs it to the driver, stores the reproduction data output from the driver in response to the read command, and outputs it to the input / output circuit, and a rewritable memory that stores the processing program of the controller. In the rewrite mode in which the processing program is rewritten, the controller stores data of the processing program input via the input / output circuit in the buffer memory and then stores the stored processing. A data processing device, characterized in that the rewritable read-only memory circuit is rewritten with program data. 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 the controller, 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 record data input from the computer to the driver. Or a controller for outputting the reproduction data to the computer, the controller being connected to the computer for inputting the recording data and outputting the reproduction data; Input via the first input / output circuit in response to the write command A first buffer memory for storing the recording data and outputting it to the driver, and storing the reproduction data outputted from the driver in response to the read command and outputting it to the first input / output circuit. And a second input / output circuit connected to the controller for inputting the recording data output from the controller and outputting the reproduction data to the controller, and the control data for writing. In response to the above, the recording data input via the second input / output circuit is temporarily stored,
A second buffer memory that temporarily stores the reproduction data corresponding to the read control data and outputs it to the second input / output circuit, and a rewritable read-only memory circuit that stores the processing program of the driver are provided. In the rewrite mode in which the processing program is rewritten, the controller outputs the data of the processing program input through the first input / output circuit to the driver through the first buffer memory, and the driver Stores the data of the processing program input through the second input / output circuit in the second buffer memory in the rewrite mode, and then rewrites the rewritable read-only data with the stored data of the processing program. A data processing device characterized by rewriting a memory circuit. 3. The controller converts the data of the processing program input in a data format with high redundancy into a data format to be stored in the rewritable read-only memory circuit and outputs the data format to the driver. The data processing device according to claim 2, wherein