KR0140838B1 - Setting and checking ROM version of electronic equipment - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of setting and checking a ROM data of an electronic device. If confirmation is required, it is possible to provide convenience in checking the version of the ROM by simply confirming the version of the current ROM by using data of a specific storage area by simple key manipulation. This is available for all electronics on which the ROM is mounted.

Description

Setting and checking ROM version of electronic equipment

1 is a block diagram of a cash register for carrying out this invention,

2 is a flowchart showing a ROM version setting method of the cash register according to the embodiment of the present invention;

3 is a flowchart showing a ROM version checking method of a cash register according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: keyboard 20: central processing unit

30: power supply unit 40: EPROM

50: RAM 60: display unit

70: printing part

The present invention relates to a method for setting and checking a ROM version of an electronic device. More specifically, the cash register sets a version of the ROM when the ROM is built at the time of manufacture. The present invention relates to a method for setting and checking a ROM version of an electronic device that allows an operation to check a version of a ROM.

In general, electronic devices incorporating a microcomputer or a microprocessor include a ROM for controlling the operation of the microcomputer or the microprocessor, and the ROM includes the microcomputer or the microprocessor. Program data relating to the operation of the processor is allocated and stored at a specific address in a predetermined data storage area.

In the ROM in which the operation program is stored, the stored data is generally produced in an erasable programmable read only memory (hereinafter referred to as 'EPROM') so that the stored state is maintained even when the power is turned off. In order to provide ease of replacement when the ROM is required, the manufacturer has printed a version number for distinguishing the ROM type on the main body, or has a version management method by attaching a sticker. The ROM that is not provided was able to know the version by checking the stored data only by using special equipment.

If an error occurs on the ROM of the electronic device manufactured in this way or if the version is increased, the user checks the version of the current ROM in the above-described manner, corrects it, and replaces it with another ROM that has a higher version of program data. There was considerable difficulty in checking the version of.

In order to overcome this inconvenience, a technique for forming a cover on a main body in which a ROM is located in the case of a terminal connected to an electronic device is disclosed in Korean Patent Publication No. 93-2951. In order to replace the ROM mounted on the terminal of the electronic device, a cover is made at a specific part of the body corresponding to the ROM position on the circuit board mounted in the terminal so that the cover can be replaced by opening the ROM. Therefore, the user has to open the cover to check the ROM version number.

After all, only the method of disassembling the main body or modifying the main body can be used to check the version number of the ROM. In particular, in the case of a cash register or similar office equipment that can not form a cover on a specific part because the internal configuration is complicated, there was a difficult problem in checking the version of the ROM.

The present invention is to solve the above problems, an object of the present invention is to set the ROM version of the electronic device to check the version of the ROM installed in the electronic device only with a simple key operation without disassembling the main body In providing.

Features of the ROM version setting and checking method of the electronic device according to the present invention for achieving the above object, in the ROM version setting and checking method of the electronic device embedded ROM; When a version number is assigned to the ROM, a version number of the ROM inputted from an input means is set, a sum of data within a predetermined range is calculated, and the sum of this data and the version number of the ROM are stored in a version check area. A version setting step; Comparing the sum of the data stored in the version check region and the version number of the ROM with the calculated data by comparing the sum of the ROM version number input by the user and the data of the data storage region of the current ROM and outputting the result as an output means. It consists of a check step.

Then, the version setting step; Inputting a version number of the ROM input from the input means; Calculating a sum of data starting from a designated address of the data area of the ROM and up to another designated address; And storing the version number of the ROM and the calculated total address in the version check region of the ROM.

It is preferable to make the width of the address which adds the start address of the ROM data area of the ROM of the designation address which designates the start above, and the sum of the address which adds the designation of the last address of the data area of the ROM as maximum as possible.

And, the checking step; Inputting a version number of the ROM input from the input means; Designating a start designation address to be checked in the data area of the ROM, and calculating a sum of data starting from a start designation address to a designated end designation address; Reading a sum of a version number and data stored in a version check region of the ROM; And comparing the sum of the read version number and the data with the sum of the input version number and the calculated data and outputting the result to the output means.

Below. A preferred embodiment of the ROM version setting and checking method for an electronic device according to the present invention will be described in detail with reference to the accompanying drawings.

In this example, the start designation address is used as the start address of the ROM data area and the end designation address is set as the last address of the ROM data area.

1 is a block diagram of a cash register for carrying out this invention.

This includes a keyboard 10 having a plurality of keys not shown for operating the cash register and an unshown mode changeover switch for setting the mode of the cash register, and a key signal input from the keyboard 10. When the power is supplied from the central processing unit 20 for processing data input and output according to the program determined by the control unit, the power supply unit 30 for controlling the power supply by the control signal provided from the central processing unit 20, and the power supply unit 30 The central processing unit 20 outputs data for executing a predetermined program, an EPROM 40, a RAM 50 storing data generated when an operation is performed in the central processing unit 20 or data necessary for performing an operation, and a central part. The display unit 70 for displaying the data output from the processing unit 20, and the printing unit 80 for printing the data output from the central processing unit 30 There is sex.

Referring first to the operation of the general cash register, there may be various modes provided to the cash register depending on the type of the program mode, the check mode, the settlement mode, the sales mode. First, the user can use this mode by manipulating a mode changeover switch (not shown) according to the necessity, and operate the cash register after placing the switch in the sale mode at the time of selling goods in the store.

First, when a power line (not shown) of the cash register is connected to a plug (not shown), the power supply unit 30 supplies power to the EPROM 40 according to a control signal provided from the central processing unit 20. Accordingly, the EPROM ( By the program provided from 40, the central processing unit 20 starts an operation.

When a user operates a predetermined key for selling or paying for an item, a key signal output from the keyboard 10 is applied to the central processing unit 20, and the central processing unit 20 performs arithmetic processing and Receipt processing to output the water and the total data on the display unit 60 and to print the data for issuing a receipt to the printing unit 70 to print. Therefore, the user issues a receipt to the purchaser whose details and amounts of the goods are printed to the buyer, and the cash register calculates the settlement and the remaining amount of the sold goods in operation and stores them in the RAM 50 as data.

In order to perform such an operation, a cash register must store a program for performing an operation by a predetermined process in the EPROM 40.

In the EPROM 40, the version corresponding to the stored program is determined as described above. The method of setting the ROM version at the time of manufacture of FIG. 2 and the method of checking the ROM version of FIG. 3 for confirming such a version by simple key operation will be described in detail.

First, the method of setting the ROM version at the time of manufacture of the electronic device is described with reference to FIG.

When the producer sets the mode switching switch (not shown) provided in the keyboard 10 of the cash register to the program position, the central processing unit 20 performs step S2 to set the execution mode to the program mode and then step S4. Scan the input key signal.

The central processing unit 20 performs steps S6 and S8 to determine whether the version number and the check key are respectively input. If the version number and the check key are not input, the central processing unit 20 performs the step S10 to correspond to the input key. If the version number and the check key are input, the step S12 is performed to set the data calculation value Total to '0' and then specify the data start address of the EPROM 40.

Where Total means any constant and is for Check Sum. This is a technical term related to a memory such as an EPROM. The total sum of data stored in the memory is stored in an arbitrary constant and used when checking whether the memory of the EPROM or the like is abnormal. That is, when checking whether or not the EPROM A and EPROM are identical or not, the sameness can be determined by checking the value of the checksum without checking the data of each address. Toral herein means a constant set for storing a data value stored in a certain address area for this purpose.

In this case, in the case of a general ROM, the data start address of the EPROM 40 is different from the amount of data that can be stored, and the start address of the data area in which the program is stored is wrong according to the ROM specification. That is, the data storage area of the ROM does not start with, for example, the address '(0000) ₁₆ ', but starts after the storage area for the required essential storage data. Since this data start address is different for each ROM type, the start address value of this data area should be specified.

That is, as a specific example, in the case of the ROM where the entire address can be set from (0000) ₁₆ to (FFFF) ₁₆ , if '(0000) ₁₆ ' is an area for the necessary storage data to be modified, data from '(003B) ₁₆ ' The storage area starts. Therefore, '(003B) ₁₆ ' is the data start address.

Therefore, the central processing unit 20 reads out the data stored at the address designated in step S14 and stores it in the buffer, increases the current address by the buffer in step S16, adds the value to the total value, and then, In S18), it is checked whether or not it is the last address.

If it is determined in step S18 that it is not the last region, the central processing unit re-performs steps S14 and S16 by designating the next address in step S20.

That is, as the central processing unit 20 determines that the final address is the last address as the steps S14, S16, S18, and S20 are repeatedly performed, the processor 20 performs the step S22 and inputs it in the step S4. The stored version number is stored in the version check area of the EPROM 40, and step S24 is further performed to store the current data sum, that is, the total value, in the version check area of the EPROM 40.

How to check the version of the ROM set as described above will be described by applying to the cash register as shown in FIG.

When the user sets the mode change switch (not shown) provided in the keyboard 10 of the cash register to the check position to replace or replace the EPROM mounted on the cash register, the central processing unit 20 performs step S32. After setting the execution mode to the check mode to perform the step (S34) to scan the input key signal.

In step S36 and step S38, if it is determined that the version number and the check key are not input, the central processing unit 20 performs step S40 to perform a function corresponding to the input key. If it is determined in step S36 and step S38 that the version number and the check key are input, the central processing unit 20 performs step S42 to set the data sum to '0' and then the data of the EPROM 40. Specify the start address. (S44)

Therefore, the central processing unit 20 reads out the data stored at the designated address and stores it in the buffer in step S46, increases the current address in step S48, adds the corresponding data value to the total value, and then executes the step ( In S50), check whether or not the last address is applied.

If it is determined in step S50 that the data is not the last area in which the data is stored, the central processing unit re-performs steps S46 and S48 by specifying the next address in step S52.

In other words, as it is determined that the step S46, step S48, step S50, and step S52 are repeated, the central processing unit 2 performs the step S54 when it is determined that it is the last address. The version number and the total value stored in the program are read out, and it is judged in step S56 whether the version number read out in this version check area is the same as the version number checked in step S36.

If it is determined in step S58 that the same value is determined in the step S58, the CPU 20 compares whether the total value read in the version check region in step S60 is equal to the total value calculated by performing the operations S46, S48, S50, and S52. After that, it is determined in step S62 whether they are the same.

If the version number and Total value which are compared with each other in step S58 and step S62 are different, the central processing unit 20 determines that the input version is different and performs step S66 to read the version number and Total and The version number and the calculated Total value are printed in the printing unit 70. If each Total value is the same in step S62, it is determined that the version entered by the user through the key is correct. Prints the version number and Total read from the version check region.

Therefore, the user sets the mode of the current cash register to the inspection mode by using the mode change switch, inputs the version number that the user thinks, and operates the check key that can be set, and then automatically prints the version number. You can easily check the version of the EPROM.

As described above, according to the method for setting and checking the ROM version of the electronic device according to the present invention, when the version number and the data sum are stored and used in the version check area of the ROM mounted at the time of manufacturing the electronic device, the ROM is operated by a simple key operation. If you need to check the version of this version, you can check the data in this version check area so that you can provide convenience when replacing or checking the version.

Although the detailed description of the present invention describes a method of setting and checking a version of a ROM mounted only on a cash register as an electronic device, it can be utilized in all electronic apparatuses equipped with a ROM according to the intention of the manufacturer.

As a specific example, a version check area of a ROM mounted in an office device such as a facsimile machine, a copier, a telephone, etc. may be set, and check data may be stored in this area so that the current ROM version can be checked by simple key operation. .

Claims (3)

In a method of setting and checking a ROM version of an electronic device incorporating a ROM, when a version number is assigned to the ROM, a version number of the ROM input from an input means is set, and a sum of data in a predetermined range is calculated to determine the data. A version setting step of storing the sum and the version number of the ROM in a version check region; A check step of comparing the sum of data stored in the version check region and the version number of the ROM with a calculated value of a ROM number input by a user and a data sum of a predetermined range of the current ROM, and outputting the result as an output means. How to set up and check the ROM version of the electronic device. The method of claim 1, wherein the version setting step; Inputting a version number of the ROM input from the input means; Calculating a data sum of a data storage area of the ROM; And storing the version number of the ROM and the calculated data sum in the version check region of the ROM. The method of claim 1, wherein the checking step; Inputting a version number of the ROM input from the input means; Calculating a data sum of a data storage area of the ROM; Reading a version number and a data sum stored in a version check region of the ROM; And comparing the read version number and the data sum with the input version number and the calculated data sum, and outputting the comparison result to the output means.