JPS5977571A - Key changing system of electronic cash register - Google Patents

Abstract

PURPOSE:To change easily the content of a key and to simplify the key operation, by providing plural key code tables in advance, selecting one of the key code tables and writing the key code into a key code storage area. CONSTITUTION:A keyboard control circuit 2 controlling a keyboard 3 via an address bus line 12 and a control bus line 13, RAM4, ROM5, display control circuit 6, printer control circuit 8, and an I/O port 10 connected to the control switch 11 are connected to a microprocessor 1 of an ECR. The RAM4 is provided with a key code storage area corresponding to each function key of the key board 3 and the ROM5 is provided with plural key code tables in advance. When the keyboard 3 keys in ''1'' or memory clear is performed with no key-in, one of the key code tables is selected and written in the key code area, allowing to change easily the content of the key.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to a key changing system for electronic cash registers.

[Technical background of the invention and its problems]

In recent years, electronic cash registers that can change the key date key contents have been developed, but the conventional method is to clear all previously set key codes when initializing the memory, and then input the necessary key codes to each function key. The method used was to manually set the If keys.

However, this method has the disadvantage that key codes must be manually set for each function key, making it extremely troublesome to change the key contents.

[Purpose of the invention]

The present invention has been made in order to eliminate such drawbacks, and an object of the present invention is to provide a key change method for an electronic cash register that allows the key contents to be easily changed.

[JI of invention! ’ [required]

Is this invention a key date? - The addresses of the key code storage areas are determined in accordance with the key arrangement positions of the various function keys on the card, and a key code table in which key codes are set in advance is provided corresponding to each key code storage area. The key code is read from the code table and written into the key code storage area, so that the key contents can be changed only by changing the contents of the key code table.

Further, the present invention provides a plurality of key code tables in advance,
The key contents can be changed by selecting one of the key code tables and writing the key code into the key code storage area.

[Embodiments of the invention]

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

In FIG. 1, 1 is a microprocessor, 2 is a key gate control circuit that controls a keyboard 3, 4 is a RAM (random access memory), and 5 is a ROM (read memory).
(only memory), 6 is a display control circuit that controls the display 7, 8 is a printer control circuit that controls the printer 9, 1
o is an IO port that takes in a signal from the control switch 11. The microprocessor 1, each control circuit 2, 6, 11, RAM 4', ROM
5 and 10yj? - and the port 10 via an address path line 12, a data path line 13, and a control path line 14. As shown in FIG. 2, the key chain 3 has rOJ~r 9 j ,
r 00 J, I-・” numeric key 31° “RF”
's receipt sending key 32, rJFJ's journal sending key 33 - 0080 function keys 34
ti'7 is configured so that numbers 1 to 3480 can be placed. Said R, AM 4 has a departmental totalizer for data registration;
The key date as shown in the three figures of the narrow cylinder of various memories for data processing and one second password for each transaction, one for each successor, etc. Eighty key code storage areas 41 to 480 are formed which are designated by the TIF area by each of the function keys 341 to s4Bg of the key code 3. In other words, the key positions of each function key 341 to 348° of key date 3 (
~ and each key code storage area 41 to 480 are one to one
It corresponds to Furthermore, the key date? Number key 31. Receipt feed key 32° Journal feed key 33
Also, a key code storage area is formed in RAM J, but this area is for each key, ?
J...? 2.

The key code corresponding to 33 is stored fixedly. The ROM 5 includes a memory for storing a program for the microprocessor 1 to control each section based on the key code read out from the RAM 4 by each key operation of the headboard 3. As shown, each key code storage area 41 of the RAM 4
Three key code tables, o and 0, are formed in which key codes are set in advance corresponding to ~4BO.

When the memory is cleared by memory initialization processing, the microprocessor 1 performs processing based on the flowchart of FIG. 5. In other words, if the numeric key 3Ω "1" is keyed in on the key date 3, or if memory clear is performed without any keying in, the key code table of the ROM 5
The contents are read out and the key codes are stored in each of the key code storage areas 41 to 4BO of the RAM 4 (respectively), and memory clearing is performed with the same number of keys 3 and ``2'' being keyed in. When this happens, read out the contents of the key code table (■) of the FtOM 5 and store the key codes in each of the key code storage areas 41 to 480 of the RAM 4, with the numeric key 3 "3" being keyed in. When memory clear is performed, the RO
The contents of the key code table ◎ of M5 are read out and the key codes are stored in each of the key code storage areas 41 to 480 of the RAM 4, respectively.

With such a configuration, when memory clear is performed, R
■ of each key code table of OM 5.

The key code set in one table of ◎ is RA
Each function key 34 of key date 3 is stored in each key code storage area 41 to 480 of M4.
Key codes from 1 to 348o are easily set. In each key code table, in (■l) and O, for example, the key code to be stored in the key code storage area 420 whose address is specified by the function key 342o, the code that means a cancel key, the code that means an open key, and correction. If the code is set in advance to mean a key, the function key 342o can be used as a cancel key or an open key depending on which table (■ or 0) of each key code table is used.

Can be selectively used as a correction key.

Further, by changing the setting position of the key code indicating the cancel key in ■ and ◎ of each key code table, the arrangement position of the cancel key in keypad 3 can be easily changed.

The key contents of each of the function keys 341 to 348o in the key code 3 can be changed by a simple operation. In this case, the key is 8 for 1 hand 3.
Although it is possible to arrange 0 function keys, the number can be easily reduced by setting key codes if necessary.

In the above embodiment, three key code tables are provided in the ROM, and a key code is selectively set in the key code storage area in the RAM from each key code table, but this is not necessarily the case. The present invention is not limited to this, and for example, the number of key code tables may be one, and the ROM may be replaced when changing the key. Further, in the embodiment described above, the number keys are used as a method of selecting one of the three key code tables, but the method is not limited to this, and selection may be made using a switch.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a key changing method for an electronic cash register that allows the key contents to be easily changed.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention. Fig. 1 is a block diagram, Fig. 2 is a key date diagram, Fig. 3 is a diagram showing the key code storage area of the RAM, and Fig. 4 is a diagram showing the key code storage area of the i ROM. FIG. 5, which is a diagram showing the code table, is a flowchart showing the processing when clearing the memory by the microprocessor. l...Microprocessor 1.7...Keyboard,
4...RAM (random access memory), 5
...ROM (read only memory)1. ? 4
1-34BQ...Function key, 41-4BO
・Key code storage area, ■, ■, 0...Key code table O

Claims (2)

[Claims] (1) Ghee 7I? - Registration and cancellation of product sales data by manual numeric keypad and various function keys.
In an electronic cash register that displays information, issues receipts, etc., the key H? The addresses of the key code storage areas are determined in correspondence to the 6 key positions of the f and R function keys on the keyboard, and a key code table in which key codes are preset corresponding to each of the key code storage areas is created. Read the key code from this key code table and write a! to the key code storage area. A key change cyr type for an electronic cash register, characterized in that the key can be changed by reading the key. (2) Keyboard numeric keypad and each: TiR function gee υ Product sales data registration 0, cancellation,
In an electronic cash register for displaying, issuing receipts, etc., the number +1b of the key code storage area is determined in correspondence with the key arrangement position of each fIF function key on the keyboard, and the number +1b of the key code storage area is determined in advance in correspondence with each key code storage area. A plurality of key code tables are provided in which key codes are set, and the key code is rv'f, lJ from a selected one of the key code tables.
A key changing method for an electronic cash register, characterized in that the key is changed by writing the key code in the corresponding area of the key code storage area.