JPS5852735A - Input and output terminal equipment - Google Patents

Abstract

PURPOSE:To eliminate the need for transfer, to reduce a load on software, and to facilitate the modification of a message, by selectively displaying messages characteristic to a system. CONSTITUTION:A CRT display device 120 with a keyboard is provided with an ROM-B200 held in readiness for use by previously storing various messages. A CPU100 transfers a message output instruction characteristic to a message to be displayed to a CRT120 with a keyboard thrugh a DMA bus 130. The CTL201 in this CRT120 receives the instruction through a DMA interface 208. According to the indication contents of the instruction, the ROM-B200 is brought under read control. Message information and its output attribute read out of the ROM-B200 are sent to a CRT control part 204, and the message indicated by the instruction is displayed on the CRT screen of a CRT205.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a CRT display unit, a DMA (Dlrsc
The present invention relates to an input/output terminal device for man-machine communication that exchanges data with a data supply source via a path.

Conventionally, in an information processing system in which a CRT display device with a keyboard is connected to a DMA path for man-machine communication 110, most of the information processing systems store message information for display on the main memory within the system.
Under the control of software, a system was adopted in which necessary message information was sequentially output from the III host memory, transferred to the CRT display device with a keyboard via the DMA path, and then output for one display.

FIG. 1 is a block diagram showing an example of a conventional system purchase at this time. In the figure, io is the main processing unit (CPU) that controls the entire system, and IJ is the main processing unit (CPU) that stores various programs (Pa, P+-...) used for processing within the system. A main memory (MM) having a work area of the device 10, Jj is a DMA path (DMA-
This is a CRT display device with a keyboard, which forms a unicorner 110 with a BU8) 13 connected above. When outputting a message, the main processing unit 10 is controlled according to the program.

The message information (Ml) in the execution program (PI) M area of main memory VI 11 is output one after another, and the DMA path 13
After being transferred to the CRT display device 12 with a keyboard, the data is displayed on the CRT screen.

In this method, the above-mentioned CRT display device with a keyboard exists as a mere input/output medium, and all system operation processing is entrusted to software.
Although there is a large degree of freedom as a T display device, the burden on software (2) is extremely large, and the maintenance of messages has been left to the person in charge of each software module.

Because it does not have a fatal impact on system operation, it is not often considered important during design. However, - for acid users in interacting with the system.

Messages are essential and very vital. Therefore the message is.

Even after the system is completed and put into operation, there are many cases where the format of the messages output must be changed. At this time, since all messages are already incorporated as software modules, the software has to be changed four times.Therefore, in the past, when you wanted to change the message output format (or output square U) depending on the usage, you could change it. This has the disadvantage that it cannot be done easily, and there is also the cost involved in changing the software.

The present invention was made in view of the above circumstances.

It is used in a system as an input/output terminal device for man-machine communication that includes a CRT display and exchanges data with a data source via a DMA path. A message specific to the system is displayed on the CRT.
It is fixedly provided in the display unit and taken out and displayed at both stations when a message is output.

To provide an input/output terminal device that eliminates the need for message transfer via a DMA path, reduces the burden on software, and allows messages to be easily changed.

An embodiment of the present invention will be described below with reference to the drawings. Second
The figure is a block diagram conceptually showing an embodiment of the present invention. In the figure, 100 is a main processing unit (hereinafter referred to as CPU) that controls the entire system, and 11θ is a work area of the CPU 100 that stores various programs (PO*P1m...) used for processing within the system. 120 is the DMA path (1) M
A-BUS) 130 is a CRT display device with a keyboard that constitutes man-machine communication I10. Here, the MM 110 does not store all message information to be displayed; instead, a fixed storage section 200 for storing messages that can be exchanged or replaced is provided in the CRT display device 120 with a keyboard. In this storage unit 200.

used within the system. Various message information (Mo=Mt-...) unique to the system is fixedly stored, and is continuously output and controlled by the control section inside the M station as necessary. Therefore, when a message is output, the message hlN(Ml) is.

The data is not transferred via the DMA path 130, but is read and displayed by internal continuous control.

FIG. 3 is a block diagram showing the components of the portion of the CRT display device with keyboard 120 according to the present invention. In the figure, 200 is a fixed storage unit (hereinafter referred to as ROM-B) for storing messages shown in FIG. There is. This ROM-B 200 contains message information @(MO,
Ml,...) are fixedly stored in advance. 2o 1 Haki; K - A microprocessor that controls the entire Mffi, including the data transfer fee with the outside and the data transfer fee between internal modules in the CRT display%@120. The organization's system (company) department (hereinafter referred to as CTL), 2
02 is a fixed storage unit (hereinafter referred to as ROM-A) in which a microprogram for controlling the CTL 201 is stored.

203 is a work RAM of the above-mentioned CTL 2oz. 2
04 is a CRT control unit (CRTC).

205 is a CRT display section, and 206 is a keyboard.

207 is a keyboard interface circuit (KB-INF
), 208 is a DMA interface circuit (DMA-IN
F).

Now, the operation in the embodiment will be explained. The CRT display device 120 with a keyboard is provided with a ROM-B 2oo that is ready for use at the start of system operation q, in which messages for each building handled in the system are stored in advance. Each message registered in this ROM-8200 has a message number and its output attribute (
(display position, line break 9 display period, etc.) are determined by -. Therefore, the CP according to the program stored in MMIIO
When executing the processing operation of UJOt7, the CPU 10
When a message output command specific to a message to be displayed from 0 to 1 is sent, this message output command is
CRT display V device 12 with keyboard via path 130
Transferred to 0. CR7 display device with keyboard 1tzz
The CTL 201 of the o gate is the DMA interface circuit 20.
When this command is received through 8, ROM-B;to follows the instruction contents of the command.

The message information and output attributes successively generated from this ROM-8200 are sent to the CRT control unit 20.
Send to 4. As a result, under the control of the CRT control unit 204, the message instructed by the hrJ command is displayed on the CRT screen of the CRT display unit 205.

In this way, according to the message output command from the CPU ioo, the internal processing operation of the CRT display device 120 with a keyboard (the continuous output operation of ROM-B'200) can display the message at both stations according to the command. By adopting the configuration for outputting messages, all message transfer operations via the DMA bus 130 are no longer necessary, and the DMA
The load placed on the bus 130 and CPUJ017' is significantly reduced. Father, since messages are not stored in MMIIO, the capacity is reduced to 1MMll0.

Alternatively, the programming capacity can be increased by using it as another program storage area. Disconnect the message from the software module and display it on a CRT with keyboard. Exchangeable (replaceable) ROM in 1120 (
By providing this in the ROM-8200, it is possible to easily change the message without changing the software, and at the same time, it is possible to reduce the cost of changing the message. Moreover, since requests for changing the boat from Message can be handled in the form of replacing the hardware (ROM-8), the cost burden can be clarified.

In the above-mentioned embodiment, the ROM-B200 is configured separately from the ROM-1202 so as to be replaceable.
It is not limited to this.

The ROM-8200 and the ROM-201 may be integrally formed using a replaceable ROM, for example.

As described in detail above, according to the present invention, an input/output terminal Vik i for man-machine communication, which is equipped with a CRT display unit and exchanges data with a data supplier via a DMA path, is provided. , used within the system. Messages specific to the system are fixedly provided in the primary CRT display unit and are selectively retrieved and displayed when outputting messages.
Message transfer via the DMA path and its control are no longer required, which reduces the burden on the DMA path and software processing unit, and also allows for the implementation of a configuration that is extremely advantageous in practice, allowing messages to be easily changed. Output terminal equipment can be provided.

[Brief explanation of the drawing]

Fig. M1 is a block diagram showing a conventional configuration, Fig. 2 is a block diagram conceptually showing an embodiment of the present invention, and Fig. @3 is a block diagram showing the structure of the main part of the above embodiment. 100... Main processing unit @ (CPU) - 110... Main entry i is device (MM), 220... CRT with keyboard
Display device, 130...DMA bus (DMA-BU8)
,. 200...Fixed storage unit for storing messages (ROM-
B), 201...machine control section (c'rr,),, to, t
...Fixed storage unit (ROM), 203...RAM
, 205...CRT display section.

Claims (1)

[Claims] A CRT display is installed on the display unit and exchanges information with the data source via the DMA path. At the input/output terminal n position for &n communication, iiJ CR
A message storage section in which predetermined message information for display is fixedly stored in the T display Wffi section, and a message output control unit that selectively reads out and controls the display output of the message information stored in this message storage section. An input/output terminal device comprising: means.