JPH03185541A - Electronic apparatus with check function - Google Patents

Abstract

PURPOSE:To make it possible to use a memory check control means in common by all sorts of machines by commanding the memory check control means to execute only the check of an information memory to be used based upon an output from a specification setting means. CONSTITUTION:The 1st and 2nd setting switches 3, 4 are provided and only the 1st dictionary memory 9 or the 2nd dictionary memory 10 selected by each setting switches 3 or 4 and used for specification is sum-checked by an exclusive sum check subroutine. Thereby, both the dictionary memories 9, 10 selected by respective switches 3, 4 can be surely checked when necessary. Thereby, plural sum check subroutines can be used in common. Since these sum check subroutines are stored in a ROM 8 to be used in common for a system program memory, the ROM chip can be used in common.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electronic device with a check function, and in particular to a memory that checks a plurality of information memories used in a control system even if the combination of information memories differs from model to model. This invention relates to a check control means that can be made common to all models.

[Prior art]

-g, in electronic devices such as personal computers, word processors, and electronic typewriters, a system program memory consisting of a non-volatile ROM (read-only memory) is provided in the control device, and this system program memory includes: A system control program for a control system that makes the electronic device function and a system check control program that performs a sum check on the system control program are stored, and the system check control program performs a sum check on the system control program when the power is turned on.

For example, in an electronic typewriter, the system program memory contains control programs that control the printing and display mechanisms in response to code data input from the keyboard, as well as various functional processing programs that execute numerous functions. A system control program for controlling the entire typewriter and a system check control program for checking the sum of the system control program are stored. When the main switch is operated to turn on the power, a system check control program performs a sum check on the system control program to ensure that the electronic typewriter is always functioning normally.

Incidentally, electronic typewriters are often available in a plurality of models with different usable functions even if the printing mechanism and display mechanism are the same.

For example, a typewriter that can use a spell check function to check the spelling of words is equipped with a dictionary memory that stores dictionary data containing a large number of words in ROM for spell checking, and also performs a sum check on the dictionary data. A memory check control program is provided. In addition, typewriters that can use the word alert function that warns about words that have similar pronunciations and are easily confused are equipped with a dictionary that stores in ROM dictionary data that has many word groups that group together multiple words that are easy to confuse. In addition to providing a memory, a memory check control program for sum-checking the dictionary data is also provided. That is, in order to shorten the processing time of system check and memory check, typewriters are equipped with only a dictionary memory suitable for each model and a memory check control program for the memory.

In typewriter models that can use the spell check function and word alert function, the system control program is sum-checked by the system check control program when the power is turned on, and each dictionary data is also sum-checked by the dedicated memory check control program. I'm trying to check it out.

[Problem to be solved by the invention]

As mentioned above, the contents of the memory check control program are different for each model, so it is not possible to standardize the memory check control program for all models, and it is necessary to prepare a different memory check control program for each model. , there is a problem in that each of them must be incorporated in accordance with the set specifications.

In particular, it is not uncommon to incorporate a system control program, system check program, and memory check program into one system ROM, but in such cases, it is not possible to share the system ROM, and multiple types of systems There is a problem in that a ROM must be prepared and installed according to the specifications.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic device with a check function that allows memory check control means to be shared among all models even if the combinations of a plurality of information memories used in a control system are not the same.

[Means to solve the problem]

An electronic device with a check function according to the present invention includes a system program memory in which a system control program for a control system that makes the electronic device function and a system check control program that checks this system control program are stored in a read-only memory. In an electronic device, a memory check control means includes a plurality of information memories storing a plurality of groups of information used in a control system, a plurality of memory check subroutines for checking each of all the plurality of information memories, and a plurality of specification setting means for selecting an information memory to be used from all the information memories;
A check command means is provided for instructing the memory check control means to execute only a check on the information memory to be used based on the output of the specification setting means.

[Effect]

In the electronic device with a check function according to the present invention, the information memory to be used is selected and set via the specification setting means from among all the plurality of information memories storing plural groups of information used in the control system.

When the electronic device is powered on, the system control program is checked by the system check control program stored in the system program memory. On the other hand, since the check command means instructs the memory check control means to only check the information memory used based on the output of the specification setting means, the memory check control means responds to each instructed information memory. Each is checked using the memory check subroutine.

〔Effect of the invention〕

As explained above, according to the electronic device with a check function according to the present invention, the memory check control means includes a plurality of information memories used in a control system and a plurality of memory check subroutines for checking each of these information memories. , a specification setting means, and a check command means for instructing the memory check control means to execute only a check on the information memory used, so even if the combination of information memories used differs for each model, all A common memory check control means can be used for all models. Therefore, there is no need to prepare a memory check control means for each model and incorporate it according to the specifications, but it is sufficient to prepare a common memory check control means and incorporate it in common to all models, which significantly reduces the manufacturing cost of electronic equipment. can be reduced.

〔Example] Embodiments of the present invention will be described below with reference to the drawings.

This embodiment is a case where the present invention is applied to an electronic typewriter which is an electronic device.

The electronic typewriter 1 has a general configuration including a keyboard 2, a type wheel type printing mechanism PM, and a display mechanism having a liquid crystal display.
The overall configuration of the control system will be explained based on the block diagram of FIG.

The electronic typewriter 1 basically includes a keyboard 2, a printing mechanism PM, a display mechanism, a control device C, and the like.

The keyboard 2 includes alphabet keys, numeric keys, symbol keys, and various function keys, and is connected to the input/output interface 5 of the control device C.

The printing mechanism PM has a general configuration including a platen that feeds printing paper, its drive motor, a petal-shaped type wheel and its drive motor, a hammer mechanism that hits the type on the type wheel, a carriage, etc., and has a low human output. Connected to interface 5.

The display mechanism has a general configuration that includes a liquid crystal display and a display controller that includes a character generator that stores a large number of dot patterns such as characters and symbols to output display data to the liquid crystal display. It is connected to the human output interface 5.

The control device C includes a CPU 7 and an input/output interface 5 connected to the CPU 7 via a bus 6 such as a data bus.
, ROMB, ROM9/10 and R as information memory
It is composed of OM20.

Furthermore, the control device C includes a first setting switch 3 for selecting whether to enable spell check processing control.
and a second setting switch 4 for selecting whether to enable word alert processing control, these setting switches 3 and 4 are connected to the input ports of the human output interface 5, respectively, When these processing controls are enabled, "L" level setting signals are output to the respective input ports.

The system program memory in ROM 8 has a printing mechanism P corresponding to the code data input from the keyboard 2.
A control program that controls M and the display mechanism, a spell check processing control program that checks the spelling of words,
The system control program of the control system that makes the typewriter function, which includes various control programs such as a word alert processing control program that warns about words that have similar pronunciations and are likely to be confused with each other, diagnoses the system control program, and each setting switch 3. Based on the setting state of 4
A diagnostic control program for diagnosing (checking) the OM9/OM10 and the like are stored. Note that the spell check process and the word alert process are already existing processes, and detailed explanation thereof will be omitted. This diagnostic control program includes calculations that calculate whether the data stored in each of ROMs 8, 9, and 10 is normal or not by adding the numerical data of each address byte by byte from the start address to the end address. A dedicated sum check subroutine is stored that performs a diagnosis (sum check) by comparing the data with pre-stored sum check data (consisting of 2 bytes).

The first dictionary memory of the ROM 9 stores, for example, data related to approximately 70,000 words classified alphabetically in the same way as a normal dictionary for the purpose of checking the spelling of words.

For example, the word "tO" is stored in the second dictionary memory of ROM10.
, rtoo'', rtWOJ, and other words that have similar pronunciations and are easily confused are grouped together, and a large number of word groups are stored in alphabetical order like a normal dictionary. In addition, instead of these ROMBs 9 and 10, there is a large capacity ROMB 1 that stores all the data of each ROMB 9 and 10.
A chip ROM (eg, 4 megabit storage capacity) may be used.

The RAM 20 stores a first setting flag D that is set when receiving a setting signal of "L" level from the first setting switch 3.
A first setting flag memory 21 that stores PI, a second setting flag memory 22 that stores a second setting flag DF2 that is set when receiving an "L" level setting signal from the second setting switch 4, a printing mechanism PM, Various types of memories necessary for controlling the display mechanism and various types of memories for temporarily storing calculation results calculated by the CPU 7 are provided.

Next, the diagnostic command control routine carried out by the control device C of the typewriter I will be described with reference to the flowchart of FIG.

When the typewriter l is powered on, system initial processing is executed, and after that, control of subroutines in the main routine is started.
The setting signal from 4 is read (310), and the setting flag DPI corresponding to the rl and J level setting signals according to the specifications is read.
- DF2 are respectively set (Sll). Next, the system control program in the ROMB is sum-checked based on the sum-check subroutine (Si2), and if the added data and the sum-check data do not match, that is, the system control program is not normal (
S13), "System error J" is displayed on the display (514), the CPU 7 is commanded to stop the system (S15), and this control is ended.

On the other hand, when the program data in the ROM 8 is normal and the first setting flag DFl in the first setting flag memory 21 is set (313: Yes, S16: Yes).
), the first dictionary data for spell tick in ROM 9 is sum-checked (S17), and as a result, if the added data and the sum-check data do not match, that is, if the first dictionary data is not normal (318: No), ""Defective Spelltic Dictionary" is displayed (S19
), this control ends through S15. When the first setting flag DPI is reset (S16: No) and when the first dictionary data is normal (318: Yes), S
Move to 20.

Next, the second setting flag DF of the second setting flag memory 22
2 is set (S20: Yes), R
The second dictionary data for word alert of OM10 is sum-checked (S21), and as a result, if the added data and the sum-check data do not match, that is, if the second dictionary data is not normal (S22: No), "Word Alert" is displayed on the display. "Defective dictionary" is displayed (S23
), this control ends through S15. When the second setting flag DF2 is reset (S20: No) and when the second dictionary data is normal (S22: Yes),
Return to main routine. Thereafter, initial settings of the printing mechanism PM and the like are executed based on various control programs.

As explained above, a first dictionary memory storing first dictionary data for spell checking used in the control system of electronic typewriter l and a second dictionary memory storing second dictionary data for word alert are provided, and each dictionary A dedicated sum check subroutine for sum checking each data is provided in the system program memory, and the first setting switch 3
and a second setting switch 4, each setting switch 3 and 4.
Since only the first dictionary memory or the second dictionary memory selected by and used according to the specifications is sum-checked by a dedicated sum-check subroutine, it is not necessary to check the sum of any dictionary memory selected by each setting switch 3 or 4. It is possible to reliably check according to the sum check, and it is possible to use a plurality of sum check subroutines in common.

Furthermore, since these sum check subroutines are stored in the ROM 8, which is common to the system program memory, this ROM chip can be shared.

In addition, it is also possible to store the data of each ROM 8, 9, and 10 in one ROM chip with a large capacity and share this ROM, so when multiple models are manufactured on the same production line, Only a part of the assembly work needs to be changed, and the assembly work as a whole is simplified.

Incidentally, the setting switches 3 and 4 may be constructed from solder points provided on a printed circuit board.

It goes without saying that the present invention can be applied to word processors and other various electronic devices.

[Brief explanation of drawings]

Figure 1 is a functional block diagram showing the configuration of the present invention, Figures 2-
FIG. 3 shows an embodiment of the present invention, FIG. 2 is a block diagram of a control system of an electronic typewriter, and FIG. 3 is a schematic flowchart of a diagnostic control routine. 1...Electronic typewriter, 3...1st setting switch, 4...2nd setting switch, 8...ROM (system program memory), 9...ROM (first dictionary memory), 10...ROM (first setting switch). 2 dictionary memory),
C...control device.

Claims (1)

[Claims] (1) Lead the system control program for the control system that makes electronic equipment function and the system check control program that checks this system control program.
In an electronic device equipped with a system program memory stored in a only memory, a plurality of information memories storing a plurality of groups of information used in the control system, and a plurality of memory checks for checking each of all the plurality of information memories. memory check control means having a subroutine; specification setting means for selecting an information memory to be used from all of the plurality of information memories; and executing only a check on the information memory to be used based on the output of the specification setting means. 1. An electronic device with a check function, further comprising check command means for instructing the memory check control means to: