JPS58154056A - Terminal device - Google Patents

Abstract

PURPOSE:To prevent the incapability of control which is carried out by a host, by providing an input monitor device to a terminal device connected to the host and switching automatically the operation to a receiving mode when the input given from an operator is interrupted for a period longer than the prescribed time. CONSTITUTION:A terminal device 2 is connected to a host (not shown in the diagram) via a terminal controller 1. The screen is stored 4 via an interface control circuit 3 during reception from the host. Thus a character pattern is generated 5, and the characters are displayed 7 with a display control 6. In case an operator is under an input state from an input device 8 via an input controller 9, the circuit 3 reports the input state with a signal (i). Thus it is impossible to receive a command from the host. In case the operator is absent from his or her seat under an input mode and the input is interrupted for a fixed period, an input monitor device 10 supplies a signal (k) to enable the reception from the host. This can avoid the incapability of reception due to a misoperation of the operator and then prevents the generation of a fault.

Description

[Detailed description of the invention] object of invention The present invention relates to an online terminal device.

Conventional technology Conventionally, online terminal systems are used in a conversational manner, sending input information from the terminal device to the host and receiving replies from the host, so when receiving commands from the host, the terminal side is in write mode. If so, the buzzer on the terminal device is sounded to notify the operator that the command from the host has been received, and a business response is sent to the host. At this time α) If the operator forgets to reset the write mode and leaves the terminal device unattended.

Host write/read (lI'RIrE/REA
D) If you are a subordinate and use it like a system console, it will cause a system failure.

h) In order to prevent system failures such as * '), a method has been adopted that supports forced writing by the host and allows forcible writing/reading from the host even when the terminal is in write mode. Even when the operator is using the key manually, the host can enter the command line, so there is a risk that the key manually powered screen may be destroyed.

In order to compensate for the above-mentioned problems, a forced write method that takes into consideration the operator's input consciousness is required.

Purpose of the Invention The purpose of the present invention is to provide a function that automatically resets the write mode if no key is pressed for a certain period of time, even if the operator does not reset the write mode. The purpose is to enable operation.

While the terminal is in write mode, it sends a bus response to the host and refuses to receive commands, so if the operator forgets to reset the write mode, the write/write from the host
This will lead to a system failure in which read operations are not possible. Therefore,
The solution is α) How to force write/read from the host even when the terminal is in write mode.

b) A method for automatically canceling write mode on the terminal side unless the key is pressed for a certain period of time.

There are two methods.1 Method h), which takes into consideration the operator's input awareness, is more appropriate for supporting normal online business.

Examples of the invention The following two embodiments of the present invention are shown in FIG. ii! I will clarify.

The online terminal system consists of a terminal control device 1 and a terminal device 2, as shown in FIG.

The terminal device 2 has an interface control circuit 59 with the terminal control device 1; a screen memory 42 for storing display information; a character pattern generator 51 that generates a display character pattern according to the information in the screen memory 4; displays according to the character pattern. It has a display control circuit 6 and a display device 7, and in terms of input, an input device 8. It consists of an input control device 9 and an input monitoring device 10 according to the invention.

Now, the operation when the terminal device 2 is in a write/readable state from the host will be described below.

1) When the terminal control device ft receives a command from the host, it checks with the interface control circuit 3 of the terminal device 2 whether the command can be received via the interface b, and if it is in a state where the command can be received, it sends the command to the host. Return a positive response.

2) Upon receiving the acknowledgment, the host sends the terminal device 2
・Transfer data to.

5) Terminal device 2r! The data received via the interface control circuit 3 is stored in the screen memory 4, and the received data is displayed on the display device 7 via the one character pattern generator 5.

If the input device in the terminal family fj12 [1B] receives a silight command from the host while the operator is inputting (the same applies if you input directly and then forget to reset the input state), the command is 1. ) This is because the interface control circuit 5 has already been notified by the input control device 9 that input is currently in progress via the control signal number.

In order to return a business response when receiving an inquiry from the terminal control value all about whether commands can be received, the terminal control value
1 sends a buzzer ringing command to the terminal device 2 and also sends the host)
Give a business response.

2) However, the input monitoring device 10 monitors the signal j that indicates the input status from the input control device 9, and if the input device 8 is not operating for a certain period of time or more, it issues an input state cancellation command k to the input control device 9. Issue to.

5) When the input control device 9 enters the input state release command 5*, it notifies the interface control circuit S that it is now ready to receive commands, and the interface control circuit 5 becomes ready to receive commands from the host. Become.

If the host side retries issuing the command at regular intervals, data can be transferred to the terminal device 2 at the time the input monitoring device 10 in the terminal device 2 issues the input state release command.

In this way, by adding the input monitoring device 10 to the terminal device 2, data transfer between the host and the terminal device 2 can be performed even if the terminal operator forgets to reset the write mode and leaves the device. You can have compassion to prevent this from happening.

Effects of the Invention According to the present invention, by having a function that automatically resets the writing mode if no key is pressed for a certain period of time, the operator forgets to reset the writing mode and leaves the terminal device. However, since the write mode is automatically reset after a certain period of time has elapsed, there is no case where the host cannot write/read, and system failures can be prevented.

[Brief explanation of drawings]

The figure is a block diagram of one embodiment of the present invention. 1... Terminal control device, 2... Terminal device. S.-Interface control circuit. 4...Screen memory. 5...Character pattern generator. 6...Display control circuit, 7...Display device, 8...
Input device, 9... Input control device. )...Input monitoring device. 1d

Claims (1)

[Claims] 1. An online terminal device including an external input device and an output device for displaying input data from the external input device and data received from a d host. A terminal device characterized in that an input monitoring device is added to monitor an operator's input consciousness and enable transmission/reception operations with a host even if the operator forgets to cancel the input state.