JPS6027017A - Setting system for action mode of terminal device - Google Patents

Abstract

PURPOSE:To prevent a setting mistake of action mode for a terminal device of program system having both data input and data display functions, by writing the action mode setting information of the terminal device to a PROM by the data input function. CONSTITUTION:A common bus 10 consists of a control signal group 12, a data bus 13 and an address bus 14. The group 12 includes a reading signal 25 and a writing signal 24 given from a CPU. A write/read control circuit 23 decodes the signal of the bus 14 and recognizes an access given to a PROM circuit from the CPU. These two actions are discriminated from each other by the presence or absence of the signals 24 and 25 and then executed. In both actions the address in a PROM chip 15 is designated by the bus 14, and a chip 15 is activated for said both actions by an enable signal 19 sent from the circuit 23.

Description

[Detailed description of the invention] The present invention relates to a terminal device, particularly a display terminal device.

This invention relates to an operation mode setting method for a keyboard/printer terminal device.

Due to advances in LSI technology, most terminal devices are based on microprocessors, and they also have various operating modes to accommodate the diversification of communication connection forms and other terminal functions. Therefore, it is necessary to initialize the operating mode according to the customer's usage status, and the settings must be retained even when the power is disconnected.

Taking a display terminal device as an example, the schematic structure of the terminal device is as shown in the block diagram shown in FIG. In the figure, a CPU I, a program memory 2. The work memory 3 is a basic element in the microprocessor system. Display control unit 4, display 5. Keyboard control unit 6. The keyboard 7 is an element specific to a display terminal device, and the round communication control section 8 is connected to a communication line 9 and performs a communication function with other devices. Each of the above elements is connected via a common bus 10vc using a microprocessor system.

The display terminal device configured in this way is a CPU
sequentially reads program instructions from the program memory 2 via the common bus 10, and the display controller 4. Keyboard control section 61 controls input/output with communication control section 8 .

Conventionally, the operation mode of the display terminal device having the above configuration is set by pcPUl( /?
- It is done after obtaining by reading.

However, the conventional method of setting operating modes using switches is effective for setting a few limited operating modes, but as the functions of terminal devices become more diverse, the number of selection factors for setting operating modes increases. Along with this, there were disadvantages such as the inability to secure physical space for switches and the possibility of human setting errors due to the increase in the number of switches.

The present invention provides an operational mode for a terminal device using a conventional switch.
It focuses on problems in any setting method, and aims to provide a setting method that does not affect the physical space even if the number of selection elements for operating mode settings increases, and is less likely to cause human setting errors. purpose.

The present invention is an operation mode setting method for a terminal device, characterized in that the program type terminal device has a data input function and a data display function, and is equipped with a FROM having a write circuit and a read circuit. .

Embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows a writing switch in place of the switch group 11 in FIG.
1 shows a block diagram of a FROM circuit having a read function. The common bus IO is composed of a control signal group 12, a data bus 13, and an address bus 14, and the control signal group 12 includes a convolution signal 24 from the CPU and a read signal 5 from the CPU. The write/read control circuit 23 decodes all the signals on the address bus 14 and
It recognizes that the access is from the CPU to the OM circuit, and distinguishes whether it is a write operation or a read operation based on the presence or absence of the convolution signal 24 from the CPU and the read signal 25 from the CPU, During a write operation, the data from the data bus 13 is sent to the (+) input/output gate 17.
The gate switching signal 20 instructs the write signal generation circuit 21 to send the PROM write signal 18 to the M chip 15 via the internal data bus 16 to the PROM write instruction signal 22. Instruct to generate.

During the read operation, (1) P to the crowd gate 17;
The output data from the ROM chip 15 is transferred to the internal data bus 1.
Gate switching signal 8 to output from 6 to data bus 13
Indicate at 20.

In both operations, the address within PROM chip 15 is specified by address bus 14, and PROM chip 15 is activated for a write or read operation by an enable signal 19 from write/read control circuit 23.

Next, a specific example of a method for writing and reading operation mode setting information into and from the FROM chip of the operation mode setting circuit having the above structure will be explained using the drawings.

FIG. 3 shows a memory map of operating mode setting information in the FROM chip with numbers 0, 1, 2, . N-3, N-2, N
-1 indicates a memory address. 1D indicates the type of operation mode setting information, for example 5.

It is assumed that there is a distinction between communication mode relationship and indication function relationship, and for each type, it is composed of N byte parameters including the entire ID.

Figure 4 explains the writing and reading of the above operating mode setting information.As a characteristic of the FROM chip, in the unwritten state, data at all addresses is expressed in 1-byte hexadecimal representation (FF)16. It is assumed that the bit 11" can be re-written to 10" and the pit 10" cannot be changed to 11". Figure 4 (JlJ is the unwritten FRO
Shows the data content of M chip, all addresses are (FF)
□6. FIG. 4(b) shows the state in which the operation mode setting information f of the type ID=(01)□6 has been written. FIG. 4C shows a state in which the operation mode setting information of type ID-(02)□60 is added and written after the operation mode setting information of type ID-(01)□6. Figure 4(d) shows the ID
-(01)□60 To change the operation mode setting information of the type, rewrite the first ■D-(01)□6 to (00)□6, and after the type of ID-(02), . ID=(0
1) □ Indicates a state in which the operation mode setting information of the 6th type has been newly included.

The above operations are executed by program instructions stored in the program memory 2 in FIG.

FIG. 5 is a flowchart showing an example of a program for incorporating operation parameters, and the input condition is a total of N bytes of the type ID and its parameters. According to this program, N
IDff1 located at the beginning of each byte is checked, and the unused ID (FF) □6 is searched and the ID and parameters are read from that address.
If it is written, discard that ID ID (00)
, 6.

FIG. 6 is a flowchart showing an example of a program for reading operating parameters, and the input condition is the type ID to be searched. According to this program, it checks ID' located at the beginning of every N bytes, and if it finds the same type ID, it reads N bytes f including the ID from there, but before that, unused ID ( When FF)□6 is found, it operates to output a message that the specified type ID was not found.

Furthermore, by using the program for writing and reading operation mode setting information shown in Figures 5 and 6 as a subroutine, it is possible to set the operation mode interactively using a guide screen that combines a keyboard and display. Become.

In addition, in the above embodiment, a PROM chip with specific characteristics is used, and an example of the format in PI (0M) is also shown, but the format is not limited to this, and may be changed as appropriate depending on the characteristics of the PROM chip used. Can be used in any format.

As explained above, according to the present invention, in the operation mode setting method of a terminal device, a setting method is realized in which various operation mode settings do not affect the physical space and human setting errors are less likely to occur. do. Furthermore, as an incidental effect, 1
There is no need to change the circuit when adding operational mode settings for additional functions, and reliability can be expected to be improved compared to mechanical parts such as switches.

[Brief explanation of drawings]

Fig. 1 is a memory map showing the operating mode setting information in the FROM chip of a conventional display terminal device (1), and Fig. 4 shows how the operating mode setting information is written and read. Memory map, FIG. 5 is a flowchart showing an example of a program for writing operation mode setting information, and FIG. 6 is a flowchart showing an example of a program for reading operation mode setting information. 1...CPU, 2... ...Program memory, 3...Work memory, 4...
Display control unit, 5-...Display, 6...
... Keyboard control section, 7 ... Keyboard, 8 ... Communication control section, 9 ... Communication line, 10 ... Common bus, 11. ...Switch group. 11'...FROM with pull-in and read-out functions
Circuit 5.10...Common bus, 12...
Control signal group, 13...f-tabus, 14...
...Address bus, 15...PROM chip, 16...Internal data bus, 17...
Input/output gate, 18...-P ROM write signal, 19... Enable signal, 20...
Gate switching signal, 21...Write signal generation circuit,
22...--PROM write instruction signal, 23...
...1 included/read control circuit, 24...CPL
Write signal from I, 25... Read signal from CPU. ″-; Me 7 Centroid Z Figure 1θ Figure 6 Hai 5 4 Figure

Claims (1)

[Claims] An operation mode setting method for a terminal device, characterized in that the program-type terminal device has a data input function and a data display function, and includes a FROM circuit having a write circuit and a read circuit.