KR19980017998A - Computer capable of modem reset in case of modem down due to external communication failure - Google Patents

Abstract

The present invention relates to a computer capable of a modem reset when the modem is down due to an external communication failure, and in particular, the modem includes modem reset means for generating a modem reset signal in response to a switch input of a reset switch; Combining means for combining the modem reset signal and the system reset signal; And a modem chip which is reset in response to a reset signal supplied from the combination means when the standby state is checked when the external application waits due to an external failure when the communication application program is executed.

Description

Computer capable of modem reset in case of modem down due to external communication failure

The present invention relates to a computer, and more particularly to a computer capable of modem reset in the event of a modem down due to an external communication failure.

Recently, in order to satisfy this with the rapid growth of the information age, computer versatility and high speed are rapidly progressing. This rapid development of computer technology has caused internationalization of computer communication, and the international computer communication operation program called Internet is widely used. The development of computer communication has caused an explosion in the network connection of a computer, and thus the number of communication network failures is increasing.

As shown in FIG. 1, a computer typically includes a central processing unit 10, a system ROM 20, a system RAM 30, a hard disk driver 40, a floppy disk driver, a printer, a keyboard, a display device, and the like. The external input / output device 50 and the modem 60 are configured by interconnecting the system bus 70. For communication, install a modem (Data Modem, Data / Fax Modem, Voice / Fax Modem, DSVD / Fax Modem, ISDN Modem) connected to a telephone line (TEL) on a computer, and install and use a communication application on the computer operating program. have. Therefore, in order to access a communication network from a computer, an operating program such as DOS, WINDOW, or WIN95 is executed first, and then a communication application is called to connect the communication network.

It is connected to the outside by the execution of communication application program, and the computer in use causes the operation of the computer to be paused due to the failure of communication line, host computer, network server, etc. Dancing often happens.

In the event of such a failure, turn off the power, press the system reset key to perform a hardware reset, or press the Ctrl-key, Alt-key, and Del-key keys on the keyboard at the same time. do. This reset operation does not have a serious effect on the DOS operating program, but on the Windows or Win95 operating program, the running program is broken or data files are lost.

In addition, when booting the communication application again by the reset execution, the central processing unit 10 reads the system program from the system ROM 20, and from the hard disk driver 40 in the boot order set in the system program. By booting the operating program and resides in the system RAM 30, a system boot is performed. In such a booting process, when a large amount of operating programs such as Windows or Win95 are booted, it takes a long time from system reset to reboot.

In particular, if the communication failure is not properly dealt with, it is impossible to communicate due to the failure of the connected party when the paid communication is connected. There was an inconvenience to bear.

An object of the present invention is to solve the problems of the prior art to the external communication failure to exit the system operating program by resetting only the modem when the communication application is down due to an external failure when the communication application is running. It is to provide a computer that can reset the modem when the modem is down.

In order to achieve the above object, the apparatus of the present invention is a computer having a modem, the modem comprising: modem reset means for generating a modem reset signal in response to a switch input of a reset switch; Combining means for combining the modem reset signal and the system reset signal; And a modem chip which is reset in response to a reset signal supplied from the combination means when the standby state is checked when the external application waits due to an external failure when the communication application program is executed.

Another modification of the present invention is a computer having a modem, wherein the modem generates a modem reset signal in response to a switch input of a reset switch in an external response waiting state caused by an external failure when a communication application is executed. Modem reset means for; And switching means connected between the modem chip and the telephone line to switch the line to an open state in response to the modem reset signal.

In addition, another modification of the present invention is a keyboard having a key input for generating a modem reset signal when the external response waiting state due to an external failure when the communication application program is executed; A computer system unit which receives a modem reset key input of the keyboard and generates a modem reset signal; It is characterized in that it is provided with a modem chip that is reset in response to the modem reset signal when it is checked whether the external response waiting state due to an external failure when the communication application program is executed.

In addition, another modification of the present invention is a keyboard having a key input for generating a modem reset signal in the case of waiting for an external response due to an external failure when the communication application program is executed; A computer system unit configured to receive a modem reset key input of the keyboard and generate a program reset signal; Modem reset means for generating a modem reset signal in response to a switch input of the reset switch; Combining means for combining the modem reset signal and the program reset signal; And a modem chip which is checked in response to a modem reset signal of the combination means when the standby state is checked when the communication application program is executed.

1 is a diagram showing the configuration of a computer with a built-in modem.

Figure 2 is a block diagram showing the configuration of a preferred embodiment of a computer built-in modem according to the present invention.

3 to 5 are flowcharts for explaining the operation of the preferred embodiment of the present invention.

6 is a block diagram showing the configuration of another preferred embodiment of a computer-embedded modem according to the present invention.

Figure 7 is a block diagram showing the configuration of another preferred embodiment of a computer built-in modem according to the present invention.

8 is a block diagram showing the configuration of another preferred embodiment of a computer-embedded modem according to the present invention.

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

Figure 2 shows a preferred embodiment of a computer built-in modem according to the present invention. In the embodiment of Fig. 2, the modem reset circuit means 61 for hardware generation of a modem reset signal when the program is down due to an external failure when the communication application program is executed, and the modem reset signal and the system reset. A combination means 62 for combining the signals, and a program down state due to an external failure upon execution of the communication application program, and in the case of the down state, reset in response to a reset signal supplied from the combination means. The bus interface unit 64 for interfacing the modem chip 63, the system bus 70 and the modem chip 63, and a line interface unit for interfacing data transmission between the modem chip and the telephone line TEL ( 65).

The modem reset circuit means 61 includes a resistor R1 connected between the power supply voltage VCC and the first node, a modem reset switch SW1 connected between the resistor R1 and the first node, and a ground with the first node. It consists of a buffer (BF1) consisting of a resistor (R2) connected between, the first trigger (N1) and the range trigger (G1 ~ G3) connected between the combination means (62). The combining means 62 is composed of a logical sum gate for logically combining the system reset signal and the modem reset signal. The modem chip 63 converts the parallel data transmitted to the system into the serial data by the DSP chip for the modem and transmits the serial data to the telephone line, receives the serial data transmitted from the telephone line, and converts the received serial data into the parallel data. Transfer the converted parallel data on the system bus. The bus interface unit 64 is connected between the system bus 70 and the modem chip 63 to input data, an address, and a control signal from the system to the modem chip, and transmit the parallel data output from the modem chip 63 to the system. It serves to transmit to the bus 70. The line interface unit 65 is connected between the modem chip 63 and the telephone line TEL to control transmission and reception of serial data. That is, in one embodiment of the present invention further comprises a modem-specific reset switch (SW1) in addition to the system reset switch for resetting the entire system of the computer by pressing the modem reset switch in the case of the aforementioned communication failure By resetting only 63, it can be easily escaped from the communication failure to the previous operating program.

3 to 5 will be described in more detail the operation of one embodiment of the present invention.

Referring to FIG. 3, the system program of the computer checks the power supply (300), and when the power is turned on, the system program of the system RAM is read into the central processing unit, and the central processing unit operates from the hard disk driver according to the system program. In operation 302, a system boot operation is read. The execution routine of the operating program is executed by booting (304) and the power off command is checked (306), and when the power is turned off, the system is shut down (308). Referring to FIG. 4, in the execution routine of the operating program, various applications are executed by user selection. When the user selects a communication application, the application is checked (400) and the communication application is determined from the hard disk driver. The call is executed to execute the communication application routine (402). If the communication application is not selected in step 400, another application is executed according to the user's selection (404). When the application ends, it returns to the system operation program.

Referring to FIG. 5, the communication application routine first checks for an error in the communication port (500), and if there is an error, generates a communication port error (502) and processes a modem error (508). If there is no error in step 500, the modem chip set of the modem board is initialized (504). When an error is checked in the initialization process, a modem chip error is generated (506) and step 508 is performed. If initialization is performed without error in step 504, communication starts (510). If the communication state is checked during communication (512) and there is no error, the communication state is maintained (514). If the communication is terminated (516), the program terminates and returns to the system operating program. In step 512, if an error occurs during communication, the communication line status is checked (518). If there is an error on the line, the carrier is checked (520). If there is no carrier, a line break error is generated (522). Step 516 is performed. In step 518, if there is no error in the line condition, the communication protocol is tested (524). If the abnormality is checked on the communication protocol, the communication protocol is restored (526) and the communication start step 510 is performed again to continue the communication. In step 524, if there is no abnormality in the communication protocol, it waits for an external response (528) and checks whether there is a modem reset command while waiting (530). If not, in step 528, the modem chip is reset (532) and step 520 is performed. Therefore, the same processing as that of the line break error is performed, thereby deviating from the communication application program.

As described above, in the exemplary embodiment of the present invention, when there is no response from the other party for a long time without a line failure or communication protocol failure, the same state as that of a communication application is down due to the inability of the cursor or key input on the screen. In this case, the modem chip is forcibly reset through the modem reset switch of the present invention so that the operating program can be released from the communication application program.

Therefore, in the present invention, it is not necessary to reboot the system, and it is possible to prevent damage to files or data due to the rebooting operation and to prevent time delay waiting for the rebooting process.

6 shows a configuration of another embodiment according to the present invention. In FIG. 6, the same parts as in FIG. 2 described above are denoted by the same reference numerals, and detailed description thereof will be omitted. In another embodiment, a modem reset signal is not applied to the modem chip, but a switch such as a relay RL1 is connected between the subscriber line connected to the line interface unit 65 as compared with the above embodiment. In the circuit for driving the relay, the on-hook signal OH of the line interface unit 65 is applied to the base through the resistor R1, the emitter is connected to the power supply voltage Vcc, and the relay RL1 is connected to the collector. Is connected between the base of the transistor Q1 and the power supply voltage Vcc and the reset switch SW1 connected between the base of the transistor Q1 and the power supply voltage Vcc. R2).

In normal operation, the transistor is turned on / off in response to the on-hook signal OH, and the relay is driven. When the modem is reset, the transistor Q1 is turned off by the ON operation of the reset switch SW1. The RL1 is turned off to generate line breaks between the modem and the subscriber line so that the modem chipset 63 can check and process the line breaks. In such another embodiment, the initialization process of the modem chipset 63 may be omitted by being out of the communication state by the line break. In addition, in the modem having a plug and play function, many restrictions are imposed on the reset of the modem chipset 63. However, in another embodiment of the present invention, since the communication failure may be caused by line disconnection, the modem may be related to the type of modem. It is very easy to apply to all modems without.

7 shows a configuration of another preferred embodiment of a computer-embedded modem according to the present invention. In another embodiment, a command such as ATZ is used by using a key or hot key that is not used well on the keyboard by using a program that resides in memory without performing a modem reset by a hardware switch compared to the above embodiments. This is the configuration to initialize the modem by passing it to the system. The modem reset command generated from the keyboard 71 is transmitted to the system 73 through the keyboard controller 72, and the system transmits the modem initialization command to the modem chip 75 through the bus interface 74 through the bus. By delivering. The modem chip is in line disconnection status in response to the modem initialization command to terminate the communication.

8 shows a configuration of another preferred embodiment of a computer-embedded modem according to the present invention. This embodiment is capable of generating both the hardware and software modem reset commands described above. The modem initialization command generated from the keyboard 71 is transmitted to the system 73 through the keyboard controller 72, and the system generates the software modem reset command through the bus interface 74 through the bus. The hardware modem reset command is generated by the modem reset circuit means 61. The generated hardware and software modem reset instruction is combined by the OR gate G4 of the combining means, and the combined modem reset signal is combined by the bus reset signal supplied from the system and the OR gate G5 to form a modem chip ( 75).

As described above, in case of DSP modem chip which is uploaded / downloaded by software after exiting from communication application program, if DSP chip downloads from system memory without downloading code from external ROM, after reset of modem Depending on its operating program, it is used as follows.

On a system using a DOS operating program, exit the program you are using and then run the program again.

If you use Windows 3.1 as an operating program, exit from the program you are using and Windows 3.1, and then re-run Windows 3.1 and the program.

When using Win95 as an operating program, close the Win95 program, restart Win95, and run the program again.

As described above, in the present invention, there is no response from the other party due to the external communication failure, which is not a checkable communication failure during communication using a computer, but the system enters the response waiting state waiting for the other party's response and the system becomes incapable. Often, to overcome this, it is possible to easily escape from this disabled state by initializing or resetting the modem chip or modem board in hardware or software separately from the system reset, and to damage the program or operating program in use. The risk of data loss can be prevented.

Claims (7)

A computer comprising a modem, the modem comprising: modem reset means for generating a modem reset signal in response to a switch input of a reset switch; Combining means for combining the modem reset signal and the system reset signal; And a modem chip which is checked in response to a reset signal supplied by the combination means when it is in a standby state and checks whether an external response is waited by an external failure when the communication application program is executed. Computer capable of modem reset in case of modem down due to communication failure. A computer comprising a modem, the modem comprising: modem reset means for generating a modem reset signal in response to a switch input of a reset switch in an external response waiting state due to an external failure upon execution of a communication application program; And switching means connected between the modem chip and the telephone line to switch the line to an open state in response to the modem reset signal. A keyboard having a key input for generating a modem reset signal when the communication response program is in an external response waiting state due to an external failure when the communication application is executed; A computer system unit which receives a modem reset key input of the keyboard and generates a modem reset signal; When the communication application program is executed, it is checked whether the external response is waiting for an external response due to an external failure, and in the standby state, the modem having an external communication failure, characterized in that the modem chip is reset in response to the modem reset signal. Computer capable of modem reset during downtime. A keyboard having a key input for generating a modem reset signal when the communication response program is in an external response waiting state due to an external failure when the communication application is executed; A computer system unit configured to receive a modem reset key input of the keyboard and generate a program reset signal; Modem reset means for generating a modem reset signal in response to a switch input of the reset switch; Combining means for combining the modem reset signal and the program reset signal; And a modem chip which checks whether an external response is waited due to an external failure when the communication application is executed, and resets in response to the modem reset signal of the combination means. Computer capable of modem reset in case of modem failure due to failure. [5] The modem of claim 4, wherein when the modem chip is downloaded, the system using the DOS operating program exits from the program in use and re-executes the user program. Resettable computer. The communication method according to claim 4, wherein when the modem chip is a downloading method, when using Windows 3.1 as an operating program, an external communication program is executed again after exiting from the program being used and Windows 3.1 and then executing the program with Windows 3.1. Computer capable of modem reset in case of modem failure due to failure. The method of claim 4, wherein when the modem chip is a downloading method, when using Win95 as an operating program, an external communication failure is performed by terminating a program being used by Win95, restarting Win95, and then executing the program again. Computer capable of modem reset in case of modem downtime.