JPS6057094B2 - remote data communication processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a program-controlled data communication processing device.

In particular, the present invention relates to a remote data communication processing device that automatically operates normally when the power is turned on after the power of the device installed in a remote location is turned off. Conventionally, in this type of device, when the power is turned off, the stored contents of the program area are erased, so even if the power is turned on afterwards, it is necessary to load a new program. The program loading method is so-called down-line loading, in which the program is transferred from a central device and loaded, or from the input/output device or file device of a data communication processing device located in a remote location. There are methods such as program loading. Therefore, using international lines or public data communication networks,
A device connected to a remote data communication processing device installed in a remote location has the drawback that it occupies a valuable transmission line to transfer the program, making it uneconomical. Furthermore, when loading a program from the file device or input/output device of a remote data communication processing device, human intervention is often required, and it is not necessary to load the program when the device is unattended or when a specialized operator is not present. There was a drawback that made it possible. Furthermore, even if down-line loading is performed, it is necessary to perform transmission control on the information transferred from the solid equipment.
The control device and program for supporting this transmission control procedure must be operating normally when the power is turned on again after the power is turned off. Moreover, since this part is a function used only during program loading and is not normally used, it would be uneconomical to provide an expensive device for this purpose. The present invention is intended to improve the above-mentioned drawbacks, and is to perform program loading without human intervention automatically, by a simple instruction from a solid device, or by a program loading instruction from the data communication processing device. The purpose is to provide an economical device that can The present invention includes a line control device that connects to a remote central processing unit via a communication path and controls the communication path, a program-controlled microprocessor, and a main storage device connected to the microprocessor. In the remote data communication processing device, a part of the main storage device is constituted by a non-volatile read-only memory, and a control program for the microprocessor is stored in the read-only memory, and the line control device is configured by a read-only memory. A program storage device storing an initial program of the configured microprocessor is connected to the line H! ] The control device loads the initial program stored in the read-only memory into the microprocessor via the line control device in response to an instruction coming from the central processing unit, power-on of the device, or a program loading instruction. It is characterized by comprising a control means. Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a system in which the present invention is implemented.

Reference numeral 101 denotes a central processing unit, which is, for example, a main control station in data communications, and is installed at the head office in sales inventory processing systems, systems, etc. Reference numeral 103 denotes a data communication processing device installed at a remote location, which is program-controlled so as to be able to perform distributed processing.

These central processing unit 101 and remote data communication processing unit 1
03 is connected to the communication line 102. or via a communication line 104 or the like via a satellite 105. FIG. 2 is a detailed internal view of the remote data communication processing device 103.

Reference numeral 201 is a main memory device, which is composed of readable and writable memory elements.

Generally, it can be divided into a program storage area 202 and a data processing and data storage area 203. The program-controlled processor 204 has a main memory 2
It is controlled by a program stored in 01. The channel device 205 is a device that exists between the processor 204, the file device 208, and the line control device 206, and transfers data between each of these devices and the processor 204. A line adapter 207 connected to the line 102 performs level conversion, serial/parallel conversion, etc., and a plurality of line adapters 207 are connected to one line control device 206. Here, in the conventional device, since the main memory device 201 is constituted by a volatile memory element, the processing device 103
If the power is cut off, the contents stored in the main storage device 201 will become meaningless.

The first feature of the present invention is that a non-volatile read-only memory is used in the area 202 of the main memory 201 where programs are stored.

By using a non-volatile memory element, if the power is turned off and then turned on again, it is possible to automatically and immediately return to normal operation. Therefore, according to this configuration, there is no need to repeatedly load a program from the solid device, the load on the solid device is reduced, and communication channels are not used unnecessarily.
Next, the second feature of the present invention will be explained.

FIG. 3 is a configuration diagram of the remote data processing device 103 according to the embodiment of the present invention. Referring to FIG. 3, a program storage device 301 is connected to the line control device 206. This program storage device 301 is composed of a nonvolatile read-only memory element. Remote data communication processing device 103
A program is loaded from the program storage device 301 when the power is turned on or in response to an initial program loading instruction from the central processing unit 101 via the line 102. In the apparatus shown in FIG. 3, since the program can be loaded only by an instruction from the central processing unit 101, there is no need to transfer all program data from the central processing unit 101. Therefore, it is possible to effectively utilize lines and reduce the load on the central processing unit.
FIG. 4 shows a more detailed configuration example of the line control device 206 and the like.

When a program loading instruction is issued on the line 102 from the central processing unit 101 and the signal line 402 from the line adapter scanning circuit 401 in the line control unit 206 is energized, the signal from the line 102 undergoes level conversion. Vessel 4
03, the AND circuit 405 is energized via the serial/parallel conversion circuit 404, and is led to the decoder 406 and the OR circuit 407. The output of this OR circuit 407 is
It is leading to 5. Now, if the input from the serial/parallel conversion circuit 404 is a program loading instruction, the output line 408 of the decoder 406 is activated, the flip-flop 410 is set via the OR circuit 409, and the AND circuit 4
11 is activated, and AND circuit 405 is deactivated.

Program storage unit 412 in program storage device 301
The signal is transferred to the channel device via the AND circuit 411 and the OR circuit 407, and the program is stored in the main memory
It is stored in 01. When such program storage is completed, the conductor 414 is energized by an instruction from the processor 204, the flip-flop 410 is reset, the AND circuit 405 is activated, and the AND circuit 411 is inactivated, and normal data processing is started. become a state. Also, when loading the program by turning on the power, connect the conductor 4.
13 is activated and sets the flip-flop 410 via the OR circuit 409, program loading can be performed in the same manner as described above.

As explained above, according to the present invention, even when the operation of the remote data communication processing device stops due to a power outage or other reason, the control program is recorded in the read-only memory that will not disappear. Moreover, since the read-only memory is within the device, there is no need to transfer the program over the communication path. Therefore, the communication path can be used more efficiently. Furthermore, the initial program is stored in the read-only memory connected to the line control device, and this is loaded automatically via the line control device when the power is turned on or otherwise started, so it is normally The same control method as for program loading from the line can be used. Therefore, the burden on the central processing unit can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a system to which the present invention is applied.

Claims (1)

[Scope of Claims] 1. A line control device 206 that connects to a remote central processing unit via a communication path and controls the communication path, a program-controlled microprocessor 204, and a main memory connected to this microprocessor. device 201, a part of the main storage device is constituted by a non-volatile read-only memory, and a control program for the microprocessor is stored in the read-only memory, the line control A program storage device 301 configured with a read-only memory and storing an initial program for the microprocessor is connected to the device, and the line control device receives instructions from the central processing unit, power-on of the device, and program loading. A remote data communication device comprising: control means for loading an initial program stored in the read-only memory into the microprocessor via the line control device according to any instruction.