JPH02170296A - Pos terminal - Google Patents

Abstract

PURPOSE:To simplify program correcting work by providing a RAM, which has a rewritable content, for which battery backup is already executed, and the content is never destroyed even when the power source of the title POS terminal is disconnected, for the POS terminal and equipping the POS terminal with a means to rewrite the content of the RAM. CONSTITUTION:A program to be executed by a CPU 1 is stored in a ROM5. Further, besides flag information to indicate whether a correcting part exists in the program in the ROM 5 or not, rewriting information is stored in a battery backup memory (BUM) 6 when a correction exists. Further, the flag information and the rewriting information are originally written in a floppy disk and written through an FDD 8 to the battery backup memory 6 by a battery backup memory 6 writing program in the ROM 5. Thus, the program of the POS terminal can be changed without exchanging hardware by simultaneously using the ROM 5 and the memory 6 having the rewritable content and the battery backup for transferring the program when the POS terminal is started.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a POS terminal in a POS system, and particularly relates to a POS terminal characterized by a 10-gram startup method that determines the operation of a POS terminal that can operate independently. .

(Prior Art) Conventionally, the basic part of a program for this type of POS terminal is stored in a ROM, and the CPU reads and executes the program from the ROM, and in the case of a program that requires a work area, the program is stored in the ROM. Once the entire 10 grams were transferred to the RAM, the program was executed while being read from the RAM.

(Problem to be solved by the invention) In the conventional program startup method described above, the program
The drawback is that if it is necessary to modify the programs stored in the OM, the hardware must be replaced, such as replacing the ROM or replacing the entire board on which the ROM is mounted.

(Means for Solving the Problems) A POS terminal according to the present invention has a program that determines the operation of the POS terminal stored in a ROM,
Once the program is expanded from ROM to RAM, the contents can be rewritten at the POS terminal that operates.
The present invention also includes a RAM that is backed up by a battery and whose contents are not destroyed even if the power of the POS terminal is turned off, and a means for rewriting the contents of the RAM.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a hardware configuration diagram of a POS terminal according to an embodiment of the present invention.

The CPU includes a display device 2, a printer 3, a key input device 4, a ROM 5, and a battery backup memory (BU).
M) 6, RAM 7 and FDD 8 are connected.

The ROM 5 stores programs executed by the CPUI. The battery backup memory (BUM) 6 stores flag information indicating whether or not there is a modified part in the program in the ROM 5, and if there is a modification, rewrite information is stored in the format shown in FIG. 2, for example. . This flag information and rewriting information were originally written on the floppy disk, and then transferred to the ROM via the FDD8.
The data is written to the battery backup memory 6 by the battery backup memory 6 write program located in the battery backup memory 5.

FIG. 2 is a diagram showing the unit of program rewriting information written in the battery backup memory.
Inside, the number of parts to be rewritten in the program will be written. The unit of rewriting information is a rewriting address 11 indicating the beginning of the rewriting location and a rewriting data length 1.
2 and actual rewritten data 13. Note that since the rewrite data length varies depending on the rewrite information, the length of the rewrite information unit itself also varies.

Figure 3 shows a part of the program stored in ROM5.
It is a flowchart of the part that the UI reads and executes.

First, check whether there are any abnormalities in the hardware that makes up the POS terminal, such as the printer 3, RAM 7, and FDD 8. Steps 21 and 22> If there are any abnormalities, display an error message (step 23), and then (Step 24). If there is no abnormality in the hardware, transfer the program stored in ROM 5 to RAM 7. Next, read flag information from backup memory 6 indicating whether program rewriting is necessary. Step 26) ends if rewriting is not necessary, and if rewriting is necessary, reads the rewriting information as shown in Figure 2 from the backup memory 6 and stores it in the RAM.
Rewrite the transferred program on T (Step 2)
8) Finish.

After the execution of the program shown in Fig. 3 is completed, the CPUI reads the program from RAM 7 and executes it. In this example, in order to convert 10 grams, the floppy disk containing the correction information is set in the FDD of the POS terminal. , it is only necessary to run the BUM rewriting program.

(Effects of the Invention) As explained above, the present invention transfers the program when starting the POS terminal not only from the ROM but also by using a rewritable memory with battery backup, thereby eliminating the need for hardware replacement. In, POS
Since the terminal program can be changed, it has the effect of simplifying program modification work.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the hardware configuration of a POS terminal according to an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of program rewriting information stored in the battery backup memory 6 of FIG. 1, and FIG. 2 is a flowchart of a program executed by the CPU of the POS terminal immediately after power is turned on. 1...CPU, 2...Display device, 3...Printer, 4...Key manual device, 5...ROM, 6...B
UM (backup memory), 7...RAM, 8.
...FDD. Figure 3 Figure 3

Claims (1)

[Claims] The program that determines the operation of the POS terminal is the ROM.
The RAM is stored in a POS terminal that operates after the program is expanded from ROM to RAM, and the contents can be rewritten and backed up by a battery, so that the contents will not be destroyed even if the power of the POS terminal is cut off. A POS terminal comprising a means for rewriting the contents of the RAM.