JPS59202563A - Data transfer system of optical disc - Google Patents

Abstract

PURPOSE:To attain efficiently data transfer of an optical disc system by providing a data buffer in an optical disc connecting device so as to perform the control such as address command of this data buffer from an optical disc controller. CONSTITUTION:The optical disc connecting device 4 connecting the optical disc controller (ODC)3 and an optical disc driver (ODU)5 has a data buffer 9 storing data read/written by the ODU5 in its inside, a control instruction is received by a transmission/receiving circuit 6 via a control instruction bus 19 from the ODC3 and decodes the instruction at a microprocessor 16. Then, the read/write start and an end address of the data buffer are designated from the ODC3 and write/ read is conducted for only a part of data in the data buffer 9, allowing to reduce the data transfer time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an optical disk data transfer method b1. In particular, the present invention relates to an optical disk data transfer system. The present invention relates to an optical disk data transfer method that efficiently performs processing.

[Background of the invention]

Optical disk data transfer is an optical disk drive device (optical disk drive device) that drives an optical disk and reads and writes data.
(hereinafter referred to as ODU) and an optical disk control device (hereinafter referred to as ODC) that controls this.

An optical disk connection device (hereinafter referred to as O8C) has the function of a string switch and modulates and demodulates data between
read/write data is transferred via the However, the data transfer rate of ODU is 131K.
The data transfer rate of ODC is 1M compared to B/S which is slow.
B/S and high speed. If the conventional data transfer method between the channel and the input/output control unit is applied to this optical disk data transfer method as is, there is a large difference in transfer speed between ODC and ODU. It is not possible to efficiently edit data during writing. In other words, in conventional data transfer between a channel and an input/output control device, it is necessary to always write and read data buffers for the entire amount of data.
Since it is not possible to control the writing and reading of data in only a portion of the data buffer, the data transfer time becomes long.

[Purpose of the invention]

An object of the present invention is to provide an optical disk data transfer method that eliminates such conventional drawbacks and can efficiently perform read/write data transfer between an optical disk drive device and an optical disk control device. It's about doing.

[Summary of the invention]

In order to achieve the above object, the optical disk data transfer method of the present invention provides read/write data transfer between an optical disk drive device and an optical disk control device via an optical disk connection device.
In an optical disk system that transfers data, a data buffer for storing read/write data by the optical disk drive device is provided in the optical disk connection device, and the writing/reading of the data starts and ends. The feature is that the address can be arbitrarily set by the optical disk control device.

[Embodiments of the invention]

FIG. 1 is a block diagram of an optical disk system showing an embodiment of the present invention.

In FIG. 1, l is the central processing unit (CPU), 2 is the channel (CH), 3 is the ODC, and ヰ is the O8C.

The convexity is ODU.

When an input/output command is issued from the central processing unit 1, the channel 2 transfers it to 0DC3, and at the same time, when writing, reads write data from the memory of the central processing unit 1 and transfers it.

In the present invention, a data buffer capable of storing read/write data is set in the 08C4, which modulates and demodulates data and has a function as a connection selection device. control including the following can be performed from 0DC3. As a result, it is only necessary to transfer data once each for writing and reading between 0DC3 and 08C4.
Light di.

When writing data to the replacement area on the back side and reading data from the straddle replacement area, 01)C3
By controlling the buffer of 08C4 from 08C4, it is only necessary to designate an arbitrary address of the buffer, read and write data, and transfer data between 08C4 and 0DU5. As a result, the data transfer efficiency between 0DC3 and ODU5 can be improved. ◇ FIG. 2 is a diagram showing the function boot of 0804 in FIG. 1. 08C4 receives the control command sent from 0DC3 via the control command bus 19 through the transmitting/receiving circuit 6. This control command is decoded by the microprocessor 16, and the microprocessor 16 controls each block inside the 08C4. Furthermore, when the execution of the control command from 0DC3 is completed, the microprocessor 16 sends an execution completion report to 0DC3 via the transmitter/receiver circuit 6.
It is reported on the C response bus 20. As a result of the microprocessor 16 decoding the control command received from OD'C3, if it is a control command for 0DU5, the microprocessor 16 transfers the ODU control command to the OD[J control command bus 17 via the transmitting/receiving circuit 12. Load it and send it to 0DU5. The response from ODU5 is sent to the transmitter/receiver circuit 12 via the ODU response bus 18. This ODU response content is decoded by the microphone processor 16 and then reported to the ODU 5 via the transmitter/receiver circuit 6.

Next, the data buffer section 9 will be explained.

The address count circuit 7 includes a microprocessor 16
The read or write start address of the data buffer 9 is set by this. The data selection circuit 8 is 0D
ODC data sent from C3 and ODU passed through read circuit 13° ECC circuit 14 from 0DU5
The selection signal is output from the microprocessor 16 to select either data or data from the microprocessor 16.

Next, the data read from the data buffer 9 is transferred to the write circuit 10. ODU is detected by write error detection circuit ll.
The data is divided into a system that is sent to 0DU5 through the transmitting/receiving circuit 12, a system that is sent to 0DC3 via the ODC response bus 20, and a system that is read by the microprocessor 16.

Here, the write circuit 10 modulates the data read out from the data buffer 9 and sends it to 0 through the transmitter/receiver circuit 12.
This is to be transferred to DU5. The microprocessor 16 manages the amount of data written into or read from the data buffer 9.

FIG. 3 shows the internal configuration of the data buffer 9.

The data buffer 9 is divided into a control information section 21 and an error information or data section 22. The control information section 21 includes instructions for 08C4, error information section address, data section address, reading data from 0DU5,
Information on the position on the optical disk where data is to be written and information indicating the amount of data is written to 0DU5. In the error information section, error information that occurs when f-event is written to or read from 0DU5 is written. 0 in the data section
Data to be written or read from ODU is written to DU5.

4 to 7 are flowcharts of the microprogram of the optical disk connection device.

Figures K and 5 show the operation when 0DC3 writes data to 0DU5. 0DC3 is the control information section 21 and data section 2 of the data buffer 9 for 08C4.
After completing the writing of 2, issue an operation start command and write 0.
The interface connection between DC3 and osc4 is severed (steps 31 to 36).

osc4 decodes the control information section 21 and reads 01) U 5
The data write operation starts, but before the start, the
The head position of DU5 is moved to the writing position (steps 37 to 40). After that, if all commands of the control information unit 21 are completed or an error occurs during the write operation and the write operation is interrupted, osc4 is set to 0. A write completion report is sent to DC3 (steps 41 to 51).

Receive write completion report OD C3c, 0Dc3 and o
Connect the sc4 interface and connect the data buffer 9.
Read the error information part of and decipher the error information.
(Steps 52-55). As a result of decoding the error information, if the data in which the error occurred requires rewriting to the replacement area on the optical disk, 0DC3
9th data buffer of 03C4 Rewrite only the control information part, leaving the data part as is (Step 31
~33). Thereafter, a rewrite operation start command is issued to 08C4 again, causing only the data in which the error has occurred to be written to the replacement area.

Next, the case where 0DC3 reads the data of 0DU5 will be described with reference to FIGS. 6, 1, and 7. .

0DC3 reads the data of 0DU5.

Move the head position of 0DU5 to the read position. 0
1) After C3 finishes writing the control information to the control information section 21 of the data buffer 9 to 08C4, it issues a command to start the reading operation by the control information section 21 of the data buffer (steps 61 to 64). 08C4 decodes the control information part 21 and starts a data reading operation from 0DU5, but before starting, the head position of 0DU5 is moved to the reading position (steps 65 to 67).

After that, when all commands of the control information section 21 are finished, the OS
c4 reports completion of reading to 0DC3 (steps 08 to 76). 0DC receives read completion report
3 reads the error information with 08C4 and decodes the error information (steps 77 to 80). Here, 0DC
3 decodes the error information and detects that data has been written to the replacement area on the optical disk.
01) C3 leaves the data section of the data buffer 9 of 03C4 unchanged and only rewrites the control information section 21,
- After that, a rereading operation start command is issued to osc4 (steps 61 to G4). osc4 reads the spare area, rewrites the data in the spare area to the address of the data section specified by the control information section 21, and reports the completion of reading to 0DC3 (steps 68 to 76).
. 0DC3 that received the read completion report is 0804
The error information part of the data reader 5 is read, the error information is decoded, and the f-data part 22 is also read, and the reading operation is completed (steps 77 to 80).

As described above, the number of open data transfers between 0DC3 and the data portion 22 of the data buffer of osc4 only needs to be once when writing data to 0DU5 and when reading a large amount of data from 0DU5. Further, when writing data to or reading data from the spare area on the optical disk, only the control information section 21 of the data buffer of the OS'C4 needs to be rewritten as 0DC3. In this way, the data transfer between ODC and O3C is not performed from the beginning again, and the necessary part (in this embodiment, the control information part)
0DC3 and 08C4 data transfer time can be shortened.

〔Effect of the invention〕

As explained above, according to the present invention, a data buffer is provided in the optical disk connection device, and the address instruction of this data buffer is controlled from the optical disk control device, so that the optical disk system can be improved. Data transfer can be performed efficiently.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of an optical disk system showing an embodiment of the present invention, FIG. 2 is a functional block diagram of an optical disk connection device in the first section I, and FIG.
Buffer configuration diagram, Figure 4. FIGS. 5, 6 and 17 are flowcharts of the operation of a microprogram of an optical disk connection device showing an embodiment of the present invention. 1: CPU, 2: Channel, 3 = Optical disk control device (
ODC), 4: Optical disk connection device (O20), 5
=Optical disk drive unit w (ODU), 9: Data buffer, 16: Microprocessor, 21: Control information section, 2
2: Error or data section. No. 1 Procedural Amendment Form C) Filed in 1982, Patent Application No. 76109 Name of the invention Optical disk data transfer system Supplementary person ++'n and 11 are f Patent applicant' +:F L 510 Seal ceremony 1 day
Contents of column supplement 11 for title of invention subject to amendment

Claims (1)

[Claims] Between the αn optical disk drive device and the optical disk control device,
Read/write via optical disk connection device. In an optical disk system that transfers
A data buffer for storing data read/written by the optical disk drive device is provided in the optical disk connection device, and control information is transferred from the optical disk control device to the data buffer). . An optical disk data transfer method, characterized in that a processor of the optical disk connection device is controlled to arbitrarily set read/write NJ start and end addresses of the data buffer.