JPS60176347A - Information communication system - Google Patents

Abstract

PURPOSE:To display complicated pictures in individual terminals synchronously by subjecting information, which is inputted from each input device, to a prescribed logical operation in a connecting device and transmitting back it to each system. CONSTITUTION:Input information from an input device 4 is given to an input/ output control part 10 through a switch 5 and is reported to a connecting device 9 through an interface line 7. The connecting device 9 subjects input information to a prescribed logical operation and transmits back the result to the input/ output control part 10. The input/output control part 10 reports this result to a control processing part 1 as if it received directly it from the input device 4. Similarly, the connecting part 9 transmits the operation result to the other microcomputer systems. Consequently, the same contents are outputted to output devices such as display devices in the other systems.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a communication system, and particularly to a communication system suitable for displaying the same screen on the displays of a plurality of microcomputer systems.

[Prior art]

2. Description of the Related Art Conventionally, a so-called electronic whiteboard system is known as a system for displaying and outputting the same screen on a plurality of terminals. However, this type of conventional method does not allow each terminal to create a program to display arbitrary complex figures, and the display is limited to handwritten figures and documents.
It was limited to simple functions such as simply displaying them or erasing specified parts.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a communication system that allows complex screens to be displayed synchronously on each terminal, such as a microcomputer system.

[Summary of the invention]

The present invention connects a plurality of computer systems to a connecting device, sends information input from an input device of any system to the connecting device, performs a predetermined logical operation on the connecting device, and then transmits the results of the logical operation to each device. By sending the information back to the system, each system can display complex screens in synchronization with the running program, as if it were input from its own input device.

[Embodiments of the invention]

FIG. 1 shows an overall block diagram of an embodiment of the present invention. In FIG. 1, 1 is a control processing unit that is the center of the microcomputer system, 2 is an output device such as a display,
3 is an external storage device such as a floppy disk, 4 is an input device such as a keyboard, and 5 and 6 are switch circuits. The control processing section 1 and the input device 4 are connected to an input/output control section 10 via switch circuits 5 and 6. This input/output control section 10
constitutes one microcomputer system,
It is connected to a connecting device 9 via interface lines 7 and 8. Other microcomputer systems are similarly connected to this connecting device 9.

The operation shown in FIG. 1 will be explained below. First, switch 5, 6
is operated as indicated by the dotted arrow (this is called the microcomputer mode), a program for creating appropriate figures, etc. is inputted from the input device 4, and the line 11. switch 5,
It is applied to the control processing unit 1 via line 13, switch 6, and line 15, and is registered in external storage device 3 such as a floppy disk. The same applies to other microcomputer systems. Next, after operating the switches 5 and 6 as indicated by the solid line arrows (this is called the communication mode), each program is run in each microcomputer system.

When inputting information is requested while the program is running, the information is inputted from the input device 4 of the microcomputer system. This input information is given to the input/output control unit 10 via the switch 5 and the interface line 12, and is notified to the connection device 9 via the interface line 7 under the control of the input/output control unit 10. The connecting device 9 performs a predetermined logical operation on the input information, and sends the result back to the input/output control unit O via the interface line 8. Input/output control unit 1
0, the information coming from the connecting device 9 is notified to the control processing section 1 via the interface line 14, switch 6, and line 15 as if the information were directly taken from the input device 4. Similarly, the connecting device 9 transmits the above logical operation results to other microcomputer systems. The control processing section 1 of each microcomputer system runs the same program. Therefore, by receiving information from the input/output control unit 10, information can be read and written to and from the external storage device 3 appropriately in the same environment.

The same content that is the processing result is displayed on an output device 2 such as a display.
Output to.

As the simplest example, suppose that the logical operation of the connection device 9 is a logical sum, and the information is input from an input device of an arbitrary microcomputer system. system"
By running the program in step 2, complex figures and the like are also output to the output device 2 of each system.

FIG. 2 shows in detail the interconnection relationship among the control processing section 1, input device 4, switch circuits 5 and 6, and input/output control section 10 in FIG. 1. In FIG. 2, the control processing unit 1 includes a microprocessor 17, a ROM 18, and a RAM 19.
．． It is composed of an input/output interface 20 and the like, and each part is interconnected by a data bus 21 and an address bus 22.

Input/output control unit] 0 is microprocessor 23, ROM
24, a RAM 25, a parallel input/output interface 26, a serial input/output interface 29, a modem 30, etc., and each part except the modem 30 is interconnected by a data bus 27 and an address bus 28.

Reference numeral 16 denotes a mode instruction line for switching the operation of the switch circuit 5.6 to the microcomputer mode/communication mode, which comes from, for example, the system console.

When the mode instruction line 16 indicates the microcomputer mode, the input device 4 is connected to the control processing unit 1 via the switch 5゜6, and input information from the input device 4 is directly taken into the control processing unit 1. ,It is processed. On the other hand, when the mode instruction line 16 indicates the communication mode, the input device 4 is connected to the input/output control section 10 via the switch 5, and the input/output control section 10 is connected to the control processing section 1 via the switch 6.
connected to. In this case, the input information from the input device @4 enters the parallel input/output interface 26 of the input/output control unit 10 via the switch 5, receives predetermined output control in the input/output control unit 10, and then is transferred to the serial input/output interface 26 of the input/output control unit 10. The data is serially outputted from the output interface 29 and sent to the connection device 9 via the modem 30 via the interface line 7. Information from the connection device 9 is input to the serial input/output interface 29 through the interface line 8 and the modem 30 , and after receiving predetermined input control from the input/output control section 10 , the information is sent from the parallel input/output interface 26 to the switch circuit 6 . The signal is given to the control processing section 1 via.

FIG. 3 is a detailed diagram of the switch circuit 5. In Figure 3, 3
2 is a 3-state gate h that is enabled when the trigger is off, and 33 is a 3-state gate that is enabled when the trigger is on. Now, when mode instruction line I6 is off and the microcomputer mode is selected, gates 1 to 32 are on, gate 33 is off, and line 11 is connected to line 13. When the mode instruction line 16 is on and the communication mode is on, the gate 32 is off, the gate 33 is on, and the line 11 is connected to the line 12.

FIG. 4 is a detailed diagram of the switch circuit 6. In Figure 4, 3
2 and 33 are three-state gates as in FIG. 3, and 34 is an or game 1-. When the line 16 is off in the microcomputer mode, the gate 32 is on and the gate 33 is off, so the line 13 is connected to the line 15 via the gate 32 and the OR gate 34. When the line 16 is on in the communication mode, the gate 32 is turned off and the gate 33 is turned on, so the line 14 is connected to the line 15 via the gates 1 to 33 and the OR gate 34.

FIG. 5 is a detailed diagram of the connecting device 9. Namely.

The connecting device 9 includes a microprocessor 35, a ROM 36,
RAM 37 and multiple sets of serial input/output interfaces 3
8 and a modem 41. Each set of serial input/output interface 38 and modem 4I corresponds to a microcomputer system connected to the connection device 9.

Note that 39 is a data bus, and 40 is an address bus.

The operation of the connecting device 9 is as follows: Information from an arbitrary input interface line 7 is received by the corresponding serial input/output interface 38 via the corresponding modem 41, and after a predetermined logical operation is performed by the microprocessor 35, the result is It is to send out to each output interface line 8 via each serial input/output interface 38 and modem 41.

In the above embodiments, a plurality of microcomputer systems are connected to the connection device.

Generally, the same applies when connecting a computer system.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to run multiple computer systems in the same environment that appropriately read and write information from and to an external storage device according to various inputs from an input device, and output the processing results to an output device. This makes it possible to process even complex drawings in each system in synchronization and display the same content on each system, which is effective for meetings between remote locations, education, and explanation of materials.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention, and FIG.
3 and 4 are detailed diagrams of the switch circuit in FIG. 1, and FIG. FIG. 3 is a detailed diagram of the connecting device. DESCRIPTION OF SYMBOLS 1... Control processing unit, 2... Output device, 3... External storage device, 4... Input device, 5, 6... Switch circuit, 9... Connection device, 10... Input/output control unit . Figure 3 Figure 4 et al.

Claims (1)

[Claims] (1) Consisting of a plurality of computer systems and a connection device that connects them, information input from an input device of any computer system is sent to the connection device, and after performing a predetermined logical operation with the connection device, An information communication method characterized in that each computer system communicates the same content by sending back the logical operation result from the connecting device to each computer system.