KR100234741B1 - Device for determining the drive type of a disc reproducer - Google Patents

Abstract

The present invention relates to an apparatus for determining a drive type of a disc player. In particular, the present invention has been made so as to enable smooth data transmission and reception by determining the type of a drive in case of overlapping by detecting a plurality of types of drives connected to the same ATAPI cable. The present invention relates to a disc player in which a host PC 200 and first and second drives 210 and 220 are commonly connected on the same ATAPI cable, and the first and second drives 210 and 220 are connected to each other. Is a recognition name selection unit 211 for setting a drive type, an interface unit 213 for performing data transmission / reception with the host PC 200 and storing a drive type, and whether there is a drive type identical to a temporary drive type at an initial operation. The recognition name checking unit 214 and the drive type set in the recognition name selecting unit 211 are temporarily stored in the interface unit 213, and the same drive type exists in the recognition name checking unit 214. In the case of detecting the microcomputer 212 to change the drive type temporarily stored in the interface unit 213, and in the case of the recognition name check, the cable from the interface unit 213 to the recognition name check unit 2 Each of the multiplexers 215 connected to each other 14 is configured.

Description

Determining drive type of disc player

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player, and more particularly, to an apparatus for determining a drive type of a disc player to enable smooth data transmission and reception by avoiding duplication of recognition names for a plurality of devices using an ATAPI interface.

Generally, disc reproducing apparatuses include a CD-player for reproducing audio data, a CD-ROM player as a data storage medium used in conjunction with a PC.

Recently, DVD-players have been released as high-density reproducing apparatuses. In response, high-density recording / reproducing apparatuses such as DVD-ROMs and recordable DVD-Rs have been studied.

Dual CD-ROMs and DVD-ROMs use a separate SCSI interface to transfer data between the PC and ROM drive. In addition, there is a new interface specification called ATAPI (Advanced Technology Attachment Packet I / F), which can be used by connecting a drive to a PC without a separate card.

These ATAPI CD-ROM drives can connect up to two drives to one ATAPI cable. In this case, each drive needs to be distinguished in order to interface with the host PC without data collision.

For this purpose, one is called the master drive and the other is the slad drive. It is up to the user to determine which drive is the master drive, depending on the setting of the jumper block on the rear of the ATAPI CD-POM drive. It can be set to one of two types: master drive and slab drive.

In the prior art applying the ATAPI interface standard, the host PC 100 and the first and second drives 110 and 120 are commonly connected on the same cable as illustrated in the configuration diagram of FIG. 1.

The first and second drives 110 and 120 may include a recognition name selecting unit 111 for setting a drive type, an interface unit 113 for transmitting and receiving data with the host PC 100 and storing a set drive type. When the power is turned on, the drive type set in the recognition name selection unit 111 is stored in the interface unit 113, and the interface unit 113 is set in a setting type from the host PC 100 and an internal register. When it is determined that the types match, each of the microcomputer 112 executes an ATAPI command transmitted from the host PC 100.

The interface unit 113 includes an ID register for storing a drive type having an identification name (ID) therein as an ATAPI interface circuit.

Referring to the operation of the prior art as follows.

When two drives 110 and 120 employing the ATAPI interface standard are commonly connected to the host PC 100, the user sets a jumper block installed at the rear of the drives 110 and 120, respectively. And slab.

Here, it is assumed that the first drive 110 is set as the master and the second drive 120 is set as the slab.

After that, when the power is turned on, the first and second drives 110 and 120 respectively read the jumper setting of the recognition name selector 111 by the microcomputer 112 and display the drive type set by the user. ) To the internal ID register.

Thereafter, the host PC 100 transmits an ATAPI command to an ATAPI cable. Each time the ATAPI command is transmitted, a drive type for performing the command is set and transmitted. At this time, each of the first and second drives 110 and 120 compares the drive type transmitted from the interface unit 113 with the ATAPI command with its own type set in the ID register.

Accordingly, when the first and second drives 110 and 120 respectively determine that the drive type transmitted with the ATAPI command from the interface unit 113 matches their own type set in the ID register, the microcomputer ( 112 executes the ATAPI command sent from the host PC 100.

For example, when the drive type set in the host PC 100 is a master, the first drive 110 executes an ATAPI command, and in the case of a slab, the second drive 120 executes an ATAPI command.

However, this conventional technique has a problem in that the interface between the host PC and the drive becomes impossible when the type settings of two ATAPI CD-ROM drives are wrong and the setting types match.

In addition, if the types of the ATAPI CD-ROM drive and the boot hard disk match, there is a problem that the host PC does not boot and the system does not operate.

In order to improve the disadvantages of the prior art, the present invention has been devised to enable smooth data transmission and reception by determining its own drive type so that there is no duplication of drive types in the case of overlapping by detecting the type of a plurality of drives connected to the same ATAPI cable. It is an object of the present invention to provide a drive type determination apparatus of a disc player.

1 is a block diagram of a prior art.

2 is a configuration diagram of a drive type determination device according to the present invention.

3 is a signal flow diagram for determining a drive type in the present invention.

<Explanation of symbols for main parts of drawing>

200: Host PC 210, 220: Drive

211: recognition name selection unit 212: microcomputer

213: interface unit 214: recognition name check unit

215: Multiplexer

The present invention provides a disc player in which a host PC (PC) and a plurality of drives are commonly connected on the same ATAPI cable in order to achieve the above object, wherein the plurality of drives include recognition name selection means for setting a drive type; Interface means for performing data transmission and reception with the host PC and storing the set drive type, recognition name checking means for checking whether there is the same drive type as its own drive type when initialized, and drive type set in the recognition name selecting means if initialized. Is temporarily stored in the interface means, and when the recognition name check means detects that the same drive type exists, the control means for changing the drive type temporarily stored in the interface means, and in the case of the recognition name check, recognizes the ATAPI cable. Personnel check means contact And if the normal operation check, a non-recognized names each constitute a multiplexer for connecting the cable to the ATAPI interface means.

The multiplexer is configured to connect the ATAPI cable to the identification name checking means only in the case of a drive performing the identification name checking.

According to an aspect of the present invention, a method of determining a drive type in a plurality of drives connected to the same ATAPI cable may include: temporarily storing a set drive type and determining whether to occupy a cable of another drive when initialized; If there is no cable occupancy, the step of determining whether there is a drive type that is the same as your drive type, and if there is a drive type that is the same as your drive type above, a drive without a name change function and a drive with a name change function are determined. In case of common connection, change the drive type in the drive that has recognition name change function. If the drive with multiple name change function is commonly connected, change the drive type in the initialized drive first. Number The.

Hereinafter, the present invention will be described in detail with reference to the drawings.

According to an embodiment of the present invention, as shown in FIG. 2, in the disc player in which the host PC 200 and the first and second drives 210 and 220 are commonly connected on the same ATAPI cable, The second drives 210 and 220 may include a recognition name selection unit 211 for setting a drive type, an interface unit 213 for performing data transmission / reception with the host PC 200 and storing a set drive type, and a power supply. When it is turned on, the drive type set in the recognition name selection unit 211 is temporarily stored in the interface unit 213, and the interface unit 213 is a type set from the host PC 200 and a type set in an internal register. If it is determined that this is the case, the microcomputer 212 executing the ATAPI command transmitted from the host PC 200 and the drive type read from the microcomputer 212 are temporarily stored to prioritize the cable. In case of use, the recognition name check unit transmits the temporary stored drive type to check whether the same drive type exists and if the same case is detected, notifies the microcomputer 212 to change the temporary stored type in the interface unit 213. 214 and a multiplexer 215 which connects a cable to the recognition name checking unit 214 in the case of recognition name checking and the cable to the interface unit 213 in the case of normal operation other than the recognition name checking. Configure.

Referring to the operation and effect of the embodiment of the present invention configured as described above are as follows.

When the drive is connected on one ATAPI cable 1) When one ATAPI CD-ROM drive is connected 2) When one ATAPI CD-ROM drive and one hard disk are connected 3) ATAPI CD-ROM There may be two drives connected.

Referring to the recognition name determination process for each of these cases is as follows.

First, when one ATAPI CD-ROM drive having a drive type selection device is connected, that is, only the drive 210 is connected to the host PC 200, when the power is turned on, the drive 210 is a microcomputer. The computer 212 reads the jumper setting of the recognition name selection unit 211 and temporarily stores the drive type set by the user in the ID register inside the interface unit 213, and then stores the temporary drive type in the identification name checking unit 214. Will be stored in.

At this time, the multiplexer 215 connects the ATAPI cable to the recognition name checker 214 to separate the interface 213 from the ATAPI cable, and the recognition name checker 214 is triggered by the microcomputer 212. This will check the busy bit in the ATAPI status register to see if the ATAPI cable is in use.

Accordingly, since there is no other drive and the busy bit of the ATAPI status register is '0', the recognition name checker 214 sets the busy bit of the ATAPI status register to '1' and its temporary drive in the ATAPI drive selection register. Set the type to send on the ATAPI cable.

Therefore, since there is no other drive and there is no response, the recognition name checking unit 2144 notifies the microcomputer 212 of the temporary drive type stored in the interface unit 213, that is, the setting jumper to the recognition name selecting unit 211 as its setting jumper. The drive type is determined.

Meanwhile, a case where two drives are connected on the same ATAPI cable will be described below.

First, the user sets a jumper block installed at the rear of the drives 210 and 220 to set the master and the slab, respectively.

After that, when the power is turned on, the first and second drives 210 and 220 respectively read the jumper setting of the recognition name selector 211 by the microcomputer 212 and indicate the drive type set by the user. The temporary drive type is stored in the ID register of the internal memory and the temporary drive type is stored in the recognition name checker 214.

At this time, the multiplexer 215 connects the ATAPI cable to the recognition name checker 214 to separate the interface 213 from the ATAPI cable, and the recognition name checker 214 is triggered by the microcomputer 214. This will check the busy bit in the ATAPI status register to see if the ATAPI cable is in use.

Accordingly, if the busy bit of the ATAPI status register is '0' and the ATAPI cable is not in use by another drive, the recognition name check unit 214 sets the busy bit of the ATAPI status register to '1'.

This indicates that the ATAPI cable is currently in use to prevent other devices from using the ATAPI cable at the same time, as well as to prevent access by the host PC 200 before the drive type is determined again if the same drive type exists. .

In addition, the recognition name check unit 214 of another drive connected to the same ATAPI cable is prevented from operating to prevent a malfunction caused by the operation of the plurality of recognition name check units.

Here, assuming that the drive 210 occupies the ATAPI cable, the drive 220 is a state in which the ATAPI cable is connected to the interface unit 213 by the multiplexer 215.

The drive 210 then sets the temporary drive type in the recognition name checker 214 in the ATAPI drive selection register and transmits an ATAPI Soft Reset command to the ATAPI cable, which matches the drive type on the ATAPI cable. A CD-ROM drive or hard disk is present to determine if there is a response.

Accordingly, the identification name checker 214 notifies the microcomputer 212 that there is no duplicate drive type on the same ATAPI cable if there is no response, and determines the temporary drive type stored in the interface unit 213 as its drive type. Do it.

If there is a response, the recognition name check unit 214, which recognizes that the same drive type as its own type exists on the ATAPI cable, informs the microcomputer 212 of the temporary drive type stored in the interface unit 213. It is decided to save the opposite type.

If the response is 'EB14h', the drive 220 is a CD-ROM drive employing the ATAPI interface standard. If the response is '01h', the drive 220 is a hard disk.

In other words, if one ATAPI CD-ROM drive and one existing hard disk are connected to the same type, ATAPI Soft Reset command is sent on the ATAPI cable to check the same drive type. When the response is made, there is a response of '01h'.

As a result, drive type redundancy has occurred, and the type of a hard disk, which is an existing drive, cannot be changed. Therefore, the drive type of the hard disk is determined by a jumper block. The drive determines the drive type opposite to the setting jumper of the recognition name selector 211.

When two ATAPI CD-ROM drives with a drive type selection function are set to the same drive type and connected, ATAPI is preferentially used in a drive in which the microcomputer 212 is first initialized and operated when power is applied. You will use a cable to check that you have the same drive type.

Accordingly, if the value 'EB14h' is answered, the drive type is recognized as a duplicate of the drive type, and the drive type is determined as opposed to the drive type set in the recognition name selection unit 211 and stored in the interface unit 213.

In other words, if two ATAPI CD-ROM drives are connected to the same drive type and connected, the drive whose power is turned on and the initialization operation first occurs will change its drive type. The type is determined.

If the same type of drive is not connected to the ATAPI cable through the above process or the same type is present, the process of determining the reverse drive type is completed.

After that, the AT210 cable is connected to the interface unit 213 by the multiplexer 215 of the drives 210 and 220.

Thereafter, the host PC 200 transmits an ATAPI command to the ATAPI cable. Each time the ATAPI command is transmitted, a drive type for performing the command is set and transmitted.

At this time, each of the first and second drives 210 and 220 compares the drive type transmitted from the interface unit 213 with the ATAPI command with its own type set in the ID register.

Accordingly, each of the first and second drives 210 and 220 is a microcomputer when the interface unit 213 determines that the drive type transmitted with the ATAPI command matches its own type set in the ID register. The ATPC command transmitted from the host PC 100 is executed.

As described in detail above, in the present invention, when a plurality of devices are connected to a host PC, the present invention detects the first drive and changes its own drive type so that the drive types are not duplicated. There is an effect that can smoothly.

Claims (3)

In a disc player in which a host PC and a plurality of disk drives are commonly connected to the same ATAPI cable, the plurality of drives perform recognition data selection means for setting a drive type, and data transmission and reception with the host PC. Interface means for storing the drive type, recognition name checking means for checking whether there is a same drive type as the temporary drive type at the beginning of operation, and temporarily storing the drive type set in the recognition name selecting means at the initial operation in the interface means. And the control means for changing the drive type temporarily stored in the interface means when the recognition name checking means detects that the same drive type exists, and the ATAPI cable connected to the interface means only for the recognition name checking. Multiple to switch by means Drive type determination apparatus of the disc player, characterized in that the respective configuration with each other. The apparatus of claim 1, wherein the recognition name checking means is configured to perform the operation of detecting the same drive type only in the case of a drive that has been initialized first. The apparatus of claim 1, wherein the multiplexer is configured so that only the drive that performs the identification name checking connects the ATAPI cable to the identification name checking means.