KR900007279B1 - Floppy Disk Driver Control in Private Switching System - Google Patents

Abstract

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Description

Floppy Disk Driver Control in Private Switching System

1 is a flow chart of a conventional fact exchanger.

2 is a circuit diagram according to the present invention.

3 is a flowchart for controlling a floppy disk driver according to the present invention.

4 is a system operation flow chart according to the present invention.

5 is a flow chart according to the error information storage of the system according to the present invention.

The present invention relates to a program change and modification method when loading a program and install data at initial system boot (Bootiong) and a system condition change in a private exchange system. The present invention relates to a floppy disk drive and a control method in a private exchange that can control data and program changes from a floppy disk by controlling the floppy disk driver (FDD) without affecting it.

In the conventional private exchange, the programs and data necessary for its operation are stored in the Erase Programabe Read Only Memory (EPROM), which is installed and configured in the exchange system to run the system. The exchange service was executed while executing the program by reading the above values.

FIG. 1 is a conventional flowchart, in which (1a) and (1b) do not mean a step of executing a predetermined program, but once data and a program to be converted into a condition of the system in step (1a) are written into EPROM. In the process of (1b), the central processing unit of the exchange accessed this data in the process of (1c) and moved it to the RAM of the working memory area to perform the change. When an error occurs, the information stored in the RAM has been driven and the lamp set in the system has been driven.

However, when the conditions of the system are changed, that is, when data and programs need to be changed or modified, the system has to be dismantled.

In addition, the error that occurs in the system can be stored in the RAM, which is a temporary storage area, but if the system is shut down or restarted (restart), all erased, there was a problem that can not be stored permanently.

Accordingly, an object of the present invention is to provide a method for controlling a floppy disk driver (hereinafter referred to as "FDD") without affecting the native chess service at all.

Another object of the present invention is to provide a method for facilitating operation and addition of a private exchange, since modifications and changes of data and programs are possible without interrupting the exchange service of the private exchange.

Another object of the present invention is to provide a method for facilitating the operation management of the system by permanently storing errors and respective information irrespective of the state of the exchange.

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

2 is a circuit diagram of the present invention, in which the first and second switch central controllers 10 and 20 have a central processing unit 11, a RAM 12, an IPI dome 13 incorporating a control program, and a DMA circuit. (14), a bus drive circuit 15 for output control of the central processing unit 11 and for driving address and information on the data buses 16, 17, and 18; The devices 10 and 20 are configured in redundancy by the information exchange bus 19 to monitor the mutual controllers and exchange information, which is a known circuit.

A bus monitoring and selection circuit 40 for monitoring, selecting, and driving address data control signals of the first and second switch central controllers 10 and 20, and a national subscriber circuit 30 from the trunk lines L1 and 12; Is connected in plurality, and the PCM highway (TX, RX) of the trunk line subscriber circuit 30 is connected to a call exchange circuit 50 and an extension subscriber circuit 60, 70, and the call exchange circuit 50 Tone and various service providing circuits 51 are connected, the bus monitoring and selection circuits 40 are connected to switch system control, address, data buses 200, 300, 400, and to the control, address, data buses 200, 300, 400. The first-4 bus driving circuits 31, 52, 61, and 71 are connected, and the first bus driving circuit 31 drives transmission / reception information with the trunk line subscriber circuit 30, and the second bus driving circuit 52. Drives the transmission and reception information with the tone and various service providing circuits 51, and the third and fourth bus driving circuits 6 1) is configured to drive hardlock the information with the extension subscriber circuits 60-70, and this configuration is also a known configuration circuit.

The FDD controllers 111 and 211 are connected to the first and second switch central processing units 10 and 20, and the FDDs 112 and 212 are connected to the FDD controllers 111 and 211 to manage information by a diskette. Configuration.

3 is a flow chart of the control of the FDD 112, 212 of FIG. 2 according to the present invention, which allows the central processing unit 10 to control the FDD 112 by means of a control program in the iPROM 13. A first step (3a) of checking whether the FDD is in use; a second step (3f) of exchanging a predetermined time after preserving the status data in a predetermined memory when the FDD is being used in the first step (3a); A third process 3b for exiting the control after instructing a floppy disk driver write / read command when the floppy disk driver FDD is not in use in the first process 3a, and the third process 36b. A fourth process (3c) for exchanging a predetermined time from the control of omission of the control), a fifth process (3d) for checking whether the floppy disco driver predetermined operation indicated in the third process (3b) is completed, and the fifth process (5). When the operation is completed in step 3d, the control is terminated. While not giving away the ticket after preserving the state in a memory comprises a sixth step (3e) to the service exchange a certain amount of time.

FIG. 4 is a system flow diagram of FIG. 2 according to the present invention. FIG. 4 is a flow chart for accessing and controlling data on diskettes of FDDs 112 and 212 under the control of FIG. 3. The system is powered on after loading programs and data onto floppy diskettes. In the first steps (4a-4d) to instruct the data and program read to the FDD, the second step (4e) to check whether the operation is completed after the operation command of the first step and the second step (4e) When the operation is completed, the control disk is transferred to the read program to check whether modifications are required in the third step (4f, 4g) and when the modification is necessary in the process (4g) of the third step (4f, 4g). The fourth step (4h, 4i) of modifying and reading the correction portion stored in the memory.

5 is a flow chart of storing error data generated from the floppy disks of the FDDs 112 and 212 according to the system error information storage according to the present invention. An analysis process 5a for analyzing the error information, an error reading process 5b for reading the error file from the diskette, and a calculation process for checking the contents of the read error file and suggesting an address for storing the error contents which occurred this time (5c). And a writing process 5c for storing the modified file in the above process on a floppy diskette.

Referring to FIG. 2-5, the embodiment of the present invention will be described in detail. Among the first and second switch central processing units 10 and 20, the first switch central processing unit 10 is the trunk line subscriber of the exchange. The exchange service is executed while controlling through the system data, the address buses 300 and 400, and the control signal line 200 connected to the circuit 30, the station subscriber circuits 60-70, and the call exchange circuit 50.

When the redundant first exchanger central processing unit 10 is operated as shown in FIG. 2, the second exchanger central processing unit 20 is placed in a standby state, so that the entire system control right is controlled by the first exchanger central processing unit 10. do.

One of the first and second switch central processing units (10, 20) is selected during operation, i.e., through the bus monitoring and selection circuit 40, the system address and the data bus (300, 400) and the control bus (200) When the FDD 112 is driven while executing the exchange service of the trunk line subscriber, the central processing unit 11 checks whether the FDD 112 reads and writes data in step 3a as shown in FIG. Therefore, when the FDD 112 is in use in step (3a), the bus service is monitored for the exchange service after temporarily storing the exchange service control program data on the FDD 112 in the process (3f) in the RAM 12. And outputting data through the selection circuit 40 to provide the exchange service with the subscriber circuits 30, 60-70 by the call switching circuit 50.

When the FDD 112 is not in use in the process (3a), the central processing unit 11 accesses the FDD controller 111 by the control program of the FDD 112 of the IPIBOUM 13 in the process (3b). When the FDD controller 111 drives the DMA circuit 14, the DMA circuit 14 receives all control rights to directly transfer information data between the RAM 12 and the FDD 112.

At this time, the use of the bus is used for a while as long as it does not interfere with each subscriber's exchange service, and after the FDD 112 is driven, the exchange service that exits the FDD control program is continued.

The central processing unit 11 continues to perform the exchange service in the process of the FDD 112 exchanging data on the diskette (3c), and then in the process (3d), the central processing unit 11 performs the process in (3b). It is checked whether the FDD 112 has completed as many commands as the commanded.

When the FDD 112 is completed in the process (3d), the FDD controller 111 gives a signal to the central processing unit 11, the central processing unit 11 recognizes this to drive the DMA circuit 14 Stop and complete the drive control of the FDD 112.

On the other hand, when the operation is not completed in step 3d, the exchange service continues for a predetermined time after storing the data on the diskette according to the writing / reading of the FDD 112 in the RAM 12 in step 3e. That is, when the use of the FDD 112 occurs during system operation, first, the state of the FDD 112 is checked first, and if it is in use, it is periodically checked while continuing the exchange service. If it is not in use, it instructs the FDD controller 111 to perform an operation to exit and checks whether the operation of the FDD 112 is completed while providing an exchange service.

If it is not completed in the step, it is checked after a certain time. However, if the process is completed, the exchange service is provided, and the FDD 112 can be controlled without affecting the chess service requiring real time operation as described above.

When receiving and operating data from outside, insert the diskette into FDD 112 to load the control program and data to the floppy disk used by the system in step (4a), and turn on and run the system in step (4b). Booting is performed so that the program is processed in the central processing unit 11 and the FDD 112 is controlled in step 4d.

At this time, the necessary portion of the floppy disk is read and stored on the RAM 12, and the control right of the program is left. That is, the process of step (4d) continues to check whether the operation of the FDD 112 indicated in step (4e) is completed by the process of step (4e) and transfers control to the program read in step (4f) when it is completed. The system will then be chess-serviced and the data on the floppy disks read will not be used until the next operation occurs. At this time, if the program needs to be modified in step 49 or the function of the changer is needed, the process is modified in step 4h, and the newly changed program or data is pulled onto the FDD 112 after the third change. The necessary parts are loaded by the process of FIG. Therefore, new services can be provided without bringing down the system.

In addition, a method of controlling a program change so that a system down does not occur is possible in the following configuration. On the floppy disk where the program is recorded during the initial system booting (if the system program consists of A, B, C, and D programs), the A, B, C, and D files and the file that manages them all together It consists of a file of FIG.

In the general management file, the size of A, B, C, and D programs, their creation date and time, and whether they have been modified are recorded. When the program is changed in the central processing unit 11 of the exchanger, the general management file is read first. Find out which part of the program you need to change. Next, the central processing unit prohibits access to the program to be changed at present, reads the necessary program file from the floppy disk, loads it into the RAM 12, and starts access to the program.

The A, B, C, and D program files are functionally divided files, and even if one of them is not executed for a while, the basic operation of the exchange, that is, call processing is possible without being interrupted.

The FDD 12 processes the information and error data generated in the system and stores the information in the RAM 12, and when writing the data to the disk of the FDD 112, first, an error generated in each part of FIG. Alternatively, the CPU 11 analyzes the data to be stored in the process (5a). For example, when the central processing unit 11 instructs a predetermined circuit with an instruction, it receives an unprocessed state as data and compares it with a reference value to analyze the error.

When the analysis is completed in the step (5a), the file to be stored from the FDD 112 to store the analyzed data is read in the process of (5b) in the manner of FIG. 3 and the number of errors is checked in the process (5c). After calculating the address to store the contents, the error contents and time are stored at the address specified in step (5d), the frame edited on the RAM (12) in step (5e) is written back to the floppy disk in the method of FIG. Complete the task.

That is, when an error or information to be stored occurs, the file is stored and read from the FDD 112 after analysis. If there is no file to read, create a new file and store it as an error.If the file exists, read the number of its contents, calculate the address to store it, store the information in the location, and then save the file in the FDD 112 again. Save it to a floppy disk. In this way, errors and information recorded on the floppy disk can be permanently stored, so that the contents can be analyzed with the floppy disk even if it is not there at that time.

As described above, the present invention enables the private exchange to control the FDD without affecting its native exchange service at all, and to modify and change data and programs without interruption of the fact exchange chess service, thereby operating and functioning the private exchange. In addition to facilitating the addition, there is an advantage that the operation and management of the system can be easily maintained by permanently storing the error and each information irrespective of the exchange counterpart.

Claims (1)

A method of controlling a floppy disk driver (FDD) in a private exchange, the first process (3a) of checking whether the floppy disk driver (FDD) is in use or the floppy disk driver in the first process (3a) A second process (3f) of exchanging the present state data for a predetermined time after the FDD is in use and a floppy when the floppy disk driver (FDD) is not in use in the process (3a); A third process (3b) exiting the control after instructing a disk driver write / read command, a fourth process (3c) for exchanging a predetermined time from the control left out of the third process (3b), and the third process A fifth step (3d) of checking whether the floppy disk driver predetermined operation instructed in step (3b) is completed, and ending control when the operation is completed in the fifth step (3d), and transferring control right;After a predetermined time stored in the memory exchange service sixth method of controlling a floppy disk drive in the private branch exchange, characterized by constituted by any process (3e) to.

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