JPH04131953A - Remote control method for computer - Google Patents

Abstract

PURPOSE:To attain the remote control of such a computer that contains no network function of a personal computer, etc., by transmitting the key input data on a control computer via a communication circuit as the key input data on a controlled computer and transmitting the display data on the controlled computer to the control computer. CONSTITUTION:The data inputted by a control computer 2 with keys are sent to a MODEM 3 based on a communication program 8, and the signal of this input data is demodulated by the MODEM 3 of the remote side and sent to a key data inserting part 4 of a controlled computer 1. The part 4 transfers the received data to an OS 6 so as to equalize this data to the key input signal of the computer 1. When the state of the computer 1 changes, the display data are outputted to a screen and the MODEM 3 through a display data acquiring part 5. Then the screen of the computer 1 is regenerated into a screen of the computer 2 by the program 8. Thus it is possible to perform the remote control of such a computer that contains no network function of a personal computer, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for remotely controlling a computer, such as a personal computer, which is not equipped with a network function, using a communication line such as a telephone line.

(Prior Art) With the development of the information society, computers are now being widely used in all fields.

Traditionally, computer communication refers to large computers,
Most systems consisted of a relatively large computer, such as a workstation, and a terminal connected to it through a communication line. Generally speaking, personal computer communication is a form in which personal computers do not directly communicate with each other, but data is stored once through a large computer, etc., and then communicated.

Figure 14 shows a block diagram when computers such as conventional personal computers communicate with each other. In Figure 0, 3 is a modem, 8
is a communication program. When computers try to communicate directly with each other, the communication program 8 starts on both sides,
Connect it to a communication line via a modem. In this way, since the communication program is running on both sides,
Naturally, in this state Okazaki cannot run any application program.

(Problem to be solved by the invention) In recent years, there has been a serious shortage of software engineers.

In addition, the level of general users cannot keep up with the computerization of society, and it is difficult to incorporate simple software.
Currently, engineers are required to be dispatched from other software companies. In such cases, it is often sufficient if the computer can be controlled remotely using a communication line, etc. However, in the case of a method using a personal computer, even if communication with the computer is possible, there is no need to remotely control the computer. It was not equipped with network functions, and even simple maintenance required traveling to the site.

In addition, with large computers and recent work stages, it is possible to connect the terminal through a communication line and operate the host side from there, but in order to do this, the operating system of the operated side must support this function. It is essential that you do so.

The present invention was made to solve these problems, and its purpose is to remotely control computers, such as personal computers, that are not equipped with network functions.

(Means for Solving the Problems) A computer remote control method according to the present invention transmits key input data from a controlling computer via a communication line to be used as key input data for a controlled computer, and displays the key input data on a controlled computer. Send data to the controlling computer.

(Operation) In the present invention, for a controlled computer without a network function, the key input data of the controlling computer is used as the key input data of the controlled computer, and the display data of the controlled computer is controlled. Remote control is possible by sending data to a local computer.

(Embodiment 1) Fig. 1 is a basic block diagram of a computer remote control method according to the present invention.
3 is a control side computer, 3 is a modem, 4 is a key data insertion unit, 5 is a display data acquisition unit, and 6 is an operating system (hereinafter referred to as OS).

7 is an application program, and 8 is a communication program. Here, the key input data entered by the control side computer, which explains the operation during remote control, is sent to the modem 3 by the communication program 8, and the modem 3 sends the sent key input data via the communication line. It is modulated into a signal in a format that can be transmitted to a communication line. The signal is demodulated by the remote modem 3 and sent to the key data insertion section 4 of the controlled computer 1. The key data insertion section 4 passes the sent data to the O86 so that it becomes a signal equivalent to the key input signal of the controlled computer 1.

This eO86 can not only function as a standalone O8, but also start the application program 7. The state of the controlled computer 1 changes according to the sent key input data.

The display data is outputted to both the single-sided display and the modem 3 by the single-display data acquisition section 5. The data sent to the modem 3 on the controlled computer side passes through a communication line and is demodulated by the modem 3 on the control computer side, and the screen of the computer l on the controlled side is reproduced on the screen of the computer 2 on the control side using the communication program 8. . In this way, the combination coater located at a remote location is operated, and the controlled computer executes and operates the application program and checks the screen state.

I [Figure 2 is a perspective view of the actual state of the computer remote control method according to the present invention.
Reference numeral 2 denotes a control side computer, 3 a modem, and 9 an integrated modem, key data insertion section, and display data acquisition section. Key input data sent from the I-control side computer 2 passes through the modem 3 and the communication line, and is demodulated by the modem section 9.

Key input on the controlled computer 1 can be performed from a separate keyboard, but this data is stored once in the key data insertion section in the control side computer 2.
The key input from the computer is inserted and sent to the computer itself. The display data of the controlled computer is sent to the display data acquisition unit in 9, and is sent there to both the display screen and the modem unit in 9. The display data sent to the modem section 9 is modulated and demodulated by the modem 3 through a communication line. The demodulated display data is reproduced on the screen of the control side computer 2.

FIG. 3 is a block diagram of the embodiment shown in FIG. 2 when key data is inserted. In this embodiment, a signal when a key is pressed on the keyboard of the controlled computer is sent to the key data insertion section. A signal sent through one communication line with this signal as a signal at point A is demodulated by a modem and sent to a key data insertion section, and this signal is used as a signal at six points. Also,
Let the signal sent from the key data insertion section to the computer main body be the signal at point B.

FIG. 14 is a diagram showing signals when key data is inserted in the embodiment of FIG. 3. The signal in this figure shows the signal processing when the keyboard is pressed first and data reception occurs first.1 In the figure, the ready signal is in a low state.
Let DATAI be the data pressed on the keyboard, which indicates that data is ready to be received. DAT
AI is sent to the key data insertion section when the ready signal at point A is in a low state. At this time, the ready signal at point A goes up to indicate that it is not ready to accept the next data. The signal sent from the modem is 6
This signal is also at point C, and is sent to the key data insertion section with the D signal low, and the ready signal remains high until it is ready to receive the primary data. The data from this modem is designated as DATA2. DATA sent from the keyboard and DATA sent from the modem
2 are respectively taken into the key data insertion section and then sent to the computer main body. This signal is the signal at point B. DATA1 is first sent out while the B point D signal is low, indicating that the computer is ready to receive data. As a result, the computer body raises the D signal at point B to notify that it is not ready to receive data, and lowers the ready signal after it is ready. This allows the primary DA
TA2 is sent to the computer main body.

In this way, data from the keyboard and data from the modem are received as exactly the same data from the computer's perspective.

5Z is a diagram showing the horizontal synchronization period of the video signal given to the display data acquisition section of the embodiment of FIG. 2. The horizontal synchronization period is repeated with the horizontal synchronization signal H5 entering every horizontal period H. There is a period called front porch HFP before the horizontal synchronization signal H8, and there is a period before the horizontal synchronization signal H8.
Behind the 8 is a period called Back Porch HBP. Data display period HD from the end of back porch HBP
Normal display data with ISP 0 is represented by the signal level of this data display period.

FIG. 6 is a diagram showing the vertical synchronization period of the video signal given to the display data acquisition section of the embodiment of FIG. 2. During the vertical synchronization period, a vertical synchronization signal vS enters every vertical cycle V. There is a period called VFP before the vertical synchronization signal vS, and a period called VBP after the vertical synchronization signal vS.

There is a data display period VDISP from the end of VBP. During this VDISP period, the horizontal period H is normally 400
repeated times.

j1!7- is a flowchart representing a method of acquiring and transmitting display data from the video signal shown in FIGS. 5 and 6. In general, one frame of data displayed on both sides of the display during the vertical synchronization period is called one frame, and the method is to first sample the data for that one frame, and then send the sampled data as is to the line. be. , one frame is a vertical synchronization period, so it is an interval of 1/60th of a second. However, when data is sent over a communication line, the commonly used lines cannot send signals this fast, so the screen of the controlling computer has a time lag compared to the screen of the controlled side.

FIG. 8 is a flowchart showing a method of acquiring display data from the video signals shown in FIGS. 6 and 7, compressing the data, and transmitting the data.

In this method, after sampling the display data, the sampled data is compressed and the compressed data is sent to the line, thereby reducing the time delay in transmission between both sides of the display. In this case, in order to perform compression, initialization is performed when the first sampled data does not exist.

FIG. 319 is a flowchart showing a detailed example of the method of compressing and transmitting data shown in FIG. This example describes the transmission of data for each line displayed during the horizontal synchronization period. One frame is equivalent to one display on both sides, but 1
A line corresponds to one line in the horizontal direction of the screen, and one frame consists of 400 lines in this embodiment.

First, data of all lines for one frame is initialized. Next, it enters a data sample loop and compares each line with the same line in the previous frame to detect any changes. If it is different from the same line in the previous frame, the data for that line is sent.

In this way, the data to be sent is compressed and the one-hour delay can be reduced by not sending it when there is no change.

(Embodiment 2) Figure 3110 is a block diagram showing a display data acquisition unit for acquiring display data. In the figure, 10 is the computer main body on the remote-controlled side, 11 is the video RAM for display (
12 is the data acquisition RAM, 13 is the modem, and 14 is the expansion slot. 1. The normal display is VRAM.
This is done by writing display data to the MII. This display data is taken out by the video output section of the computer main body 10 and displayed on the CRT. RAM1
2 is connected to the expansion slot 14 and configured to have the same address as the VRAM 11. Therefore, VRAM
When data is written to II, it is also written to RAM 12 on the expansion slot side. Therefore, VRAMII
and RAMl2) contents are always exactly the same. The data is sent from the RAM 12 to the modem 13, and the modem 13 sequentially sends it out to the communication line. In this way, display data can be acquired and sent.

FIG. 11 is a block diagram of a display data acquisition unit equipped with a data compression function.
15 is a RAM for data acquisition, 16 is a RAM for data comparison
, 17 is a ratio conversion circuit, and 18 is a moderator. 1 Normal display is performed by writing display data to VRAMI 1.

The RAM 15 is connected within the expansion slot 14 and is connected to the VRAMI
Configure it so that it has the same address as I.

Therefore, the contents of VRAM II and RAM 12 are always exactly the same. The data retrieved from RAM15 is
It is compared with the contents of RAM 16. At this time, if the data match, there is no output from the comparison circuit Ji, L7; if the data do not match, the data is output from the comparison circuit 17 to the modem 18 and RAM 16. modem 18
are sent sequentially to the communication line. The data output to the RAM 16 updates the RAM 16. In this way, it is possible to send only the changed portion of the screen data to the communication line.

(Embodiment 3) Figure 12 is an internal block diagram of the remotely operated computer in which the key data insertion unit and display data acquisition unit reside permanently.The key data insertion unit and display data acquisition unit in Figure 1 are stored in the memory after the computer is started The key input data sent through the 0 communication line, which is assumed to be resident in the R5-232C device driver, is demodulated by the modem and sent to the R5-232C device driver.

The R8-2320 device driver passes the sent key input data to the key data insertion section.
The IOS interrupt destination is changed to the key data insertion section itself, and the keyboard BIOS is called from there. Therefore, from the perspective of the standard CON device driver, there is no difference between data input from the keyboard and key input data transmitted over the communication line.

The display data output from the MS-5YS is sent to the standard CON device driver, where it normally
iO2 is called. However, since the display data acquisition section has changed the interrupt that calls the CRT-BiO8 so that it is itself called, the display data acquisition section acquires the display data.

The data is passed to the CRT-BiO8 and the R5-232C device driver.The R5-23-2C device driver sends the display data to the modem, which modulates the data and sends it out to the communication line.

Figure 13 is an internal block diagram of the remotely operated computer using the replacement CON device driver.
The key input data sent through the 0 communication line, which is the N device driver, is demodulated by the modem and sent to the R8-232C.
Sent to device driver. The R5-232C device driver replaces the sent key input data and CON
Pass to device driver. When the replacement CON device driver receives a key input request from MS-5YS,
Data entered from the keyboard and data sent via the communication line are returned to the MS-8YS in exactly the same way.
Therefore, when viewed from the MS-8YS, there is no difference between the data input from the keyboard and the key input data transmitted via the 5 communication line.

Display data output from MS-3YS is replaced by CON
Sent to device driver - it is CRT-BiO2
and pass it to the R8-232C device driver, R5-23
The 2C device driver sends display data to the modem,
The modem modulates the data and sends it out onto the communication line.

(Effects of the Invention) As described above, the computer remote control method according to the present invention can remotely control a computer that is not equipped with a network function, such as a personal computer, so there is no need for a software engineer to go to the site. The aim is to save travel time and make effective use of software engineers.

[Brief explanation of the drawing]

Figure 1-1 is a basic block diagram of the computer remote control method according to the present invention, Figure 312 is an actual perspective view of the computer remote control method according to the present invention, and Figure 3 is a block diagram of the embodiment shown in Figure 2 when key data is inserted. , FIG. 4 is a diagram showing the signal at the time of key data insertion in the embodiment shown in FIG. 31!3, and FIG. Figure 1 [Figure 6 is IF2
FIG. 7, which is a diagram showing the vertical synchronization period of the video signal given to the display data acquisition section of the embodiment shown in the figure, shows a method of acquiring and transmitting display data from the video signal shown in FIG. 115 and IF5. IF5 is a flowchart showing a method of acquiring display data from the video signals shown in FIGS. 6 and 711, compressing the data, and transmitting it. FIG. 119 is a flowchart showing a method of compressing and transmitting the data of IF8. Flowchart representing a detailed example of the method, I[1
Figure 0 is a block diagram showing the display data acquisition unit for acquiring display data, IF11 diagram is a block diagram of the display data acquisition unit equipped with a data compression function, and Figure 1112 is the key data insertion unit/display data acquisition unit. Figure 1113 is an internal block diagram of a computer to be remotely operated by a replacement CON device driver, and Figure 1114 is a block diagram when computers such as conventional personal computers communicate with each other. be. In the figure, 1...Controlled computer, 2...Control side computer, 3...Modem, 4...Key data insertion section, 5...Display data acquisition section, 6...Operating system ( Hereinafter, O8), 7...Application program, 8...Communication program, 9...Modem, key data insertion section, and display data acquisition section integrated into one, 10-...Remote operation side computer body,
11- Display video RAM (hereinafter referred to as VRAM), 12
... RAM for data acquisition, 13 ... Modem, 14-
...Expansion slot, 15-...RAM for data acquisition, 1
6... RAM for data comparison, 17... Comparison circuit, 1
8...-Modem. Note that the same reference numerals in each figure indicate the same or corresponding parts. 81 patentees Nakano System IIIM Co., Ltd.! Pole 21m No. 313iI ← Press data reception Fig. 4! ! Figure 8 I! Figure 9-1 Horizontal synchronization period Figure 5 Figure 6 'SO cause Figure 11

Claims (8)

[Claims] (1) A control computer that performs remote control, a modem that modulates and demodulates communication data and is inserted between the communication line and the controlled computer, a modem that is inserted between the communication line and the control computer, and key input data sent from the control computer. It consists of a key data insertion section that inserts the key data into the keyboard press data of the controlled computer, a display data acquisition section that acquires screen display data and passes the acquired data to the modem.
The key input data of the control side computer is transmitted via the communication line and becomes the key input data of the controlled side computer,
A computer remote control method characterized by transmitting display data of a controlled computer to a controlling computer. (2) A computer remote control method according to claim 1, characterized in that the acquired display data is compressed. (3) The computer remote control method according to claim 1, characterized in that the computer remote control method includes a display data acquisition section consisting of a RAM located at the same address as a video RAM that stores screen display data of the controlled computer. Method (4) A computer remote control method according to claim 2, characterized in that the compression of display data is compared with the corresponding portion of the previous screen and only the changed points are transmitted. (5) In the computer remote control method of claim 3, the RAM, the change point detection RAM, the change point detection layer RAM, and the video RAM are arranged at the same address as the video RAM that stores the screen display data of the controlled computer. A computer remote control method characterized by having a display data acquisition section consisting of a comparison section that compares a RAM arranged at the same address, and comparing it with the previous screen and transmitting a change point. (6) In the computer remote control method of claim 1, the key data insertion and display data acquisition unit is arranged by replacing the CON device driver. (7) The computer remote control method according to claim 1, characterized in that the keyboard BIOS interrupt destination is changed and the key data insertion section is inserted between the CON device driver and the keyboard BIOS. (8) The computer remote control method according to claim 1, characterized in that the CRT-BIOS interrupt destination is changed and the display data acquisition section is inserted between the CON device driver and the CRT-BIOS.