KR890003984B1 - Document control method in memory typewriter - Google Patents

Abstract

The method for storing the document on the disk comprises a first process for determining the document size by setting the number of maximum utilizable sector of the document management table as a capacity of dynamic RAM (30), a second process for storing the document which is examined as a new document, and a third process for updating already existing document by new data. The typewriter includes a CPU (10) for comparing and deciding the input data, an address latch (20) for latching the address signal of the CPU, a PROM (50) having a process program, and an address decoder (50) for transmitting the selecting signal of the memory and a peripheral controller by receiving the address latch signal.

Description

How to manage documents on a memory typewriter with a floppy disk driver

1 is an overall system diagram for the present invention.

2 is a flowchart of document storage according to the present invention.

3 is a structural diagram of a document management table according to the present invention.

* Explanation of symbols for main parts of the drawings

10: central processing unit 20: address latch

30: Dynamic RAM 40: Program ROM

50: address decoder 60: floppy disk controller

70: floppy disk driver 80: LCD controller

90: LCD 100: keyboard controller

110: keyboard 120: print driver

130: printer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of storing a document created by a memory typewriter equipped with a floppy disk driver (FDD: FLOPPY DISC DRIVER) on a floppy disk. The present invention relates to a method of permanently storing a document by transferring the document to a floppy disk in time.

In general, a memory typewriter stores a written document in RAM, which is a main memory of the memory typewriter, and thus requires a lot of memory.

In particular, since a back-up power source is required to preserve the archived documents, the main memory RAM uses a static RAM, which increases costs and increases the size of the printed circuit board (PCB). there was.

Therefore, in order to solve the above disadvantages and to store many documents, the floppy disk driver is attached to the memory typewriter and the document is written on the floppy disk when the typewriter is finished. Its purpose is to provide a way to use a small size of dynamic RAM, to remove the power for memory backup, and to re-use documents stored on the floppy disk at any time.

Therefore, a central processing unit (hereinafter referred to as CPU) for comparing and judging data input by a program for carrying out the object of the present invention, and an address latch for latching each system-specific address (ADDERS) signal of an output from the CPU; A dynamic RAM as a temporary storage device, a program ROM in which the program of the present invention is incorporated, an address decoder which receives the address latch output signal and outputs signals of each memory and a peripheral controller, and a floppy disk described later. A floppy disk controller (FDC: FLOPPY DISC CONTROLLER) that controls the driver and a floppy disk driver that is controlled by the FDC and can permanently store documents written on a recording medium called a diskette, and an LCD controller to control the LCD described later. LCD to display data and keyboard described below And a printer driver for driving a printer, a keyboard and the keyboard controller to be described later for inputting data and for controlling, the input data characterized in that the printer is configured for printing.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a complete system diagram for the present invention, a CPU 10 for comparing and judging data input by a program, and an address latch 20 for latching each system-specific address signal output from the CPU 10. FIG. And an address decoder for receiving a dynamic RAM 30, which is a temporary storage device, a program ROM 50 in which the program of the present invention is embedded, and the address latch block signal, and outputting a selection signal of each memory and a peripheral controller. 50) and a floppy disk controller 60 for controlling a floppy disk driver, which will be described later, and a floppy disk controller controlled by the floppy disk controller, and can access data on the disk according to the operation (DRJVER) with a floppy disk for data storage called a diskette. A floppy disk driver 70 and an LCD controller 80 for controlling an LCD to be described later and input data rolls. To display the LCD 90, the keyboard controller 100 for controlling a keyboard to be described later, a keyboard 110 for inputting data, a printer driver 120 for driving a printer to be described later, and input data. It consists of a printer 130 for.

2 is a flowchart of creating a new document according to the present invention, and FIG. 3 is a structure diagram of a document management table according to the present invention.

Therefore, when a concrete embodiment of the present invention is described in detail based on the above-described configuration and flowchart, the system is equal to the capacity of the dynamic RAM 30 according to the program stored in the program ROM 40 at the same time the power is applied. The capacity is converted into sectors, set to the "maximum number of sectors used" in the document management table, and the state is waiting for a key input.

After that, data input through the keyboard is temporarily stored in the dynamic RAM 30 which is a work area.

When the user inputs the document end key to finish the creation of the document, the floppy disk controller 60 is selected according to the output signal of the address decoder 50 and at the same time, the CPU 10 checks the document name and checks whether the document is a new document or not on the floppy disk. If the document is a new document, the CPU 10 outputs a WRITE signal to the floppy disk controller 60, and the data bus is temporarily stored in the dynamic RAM 30. Will be transferred onto the floppy disk. After data transfer is complete, set a new document name and document number in the document management table, check and set the starting sector number where the document is stored, and clear and return to the dynamic RAM 30 to prepare for accepting key input again. Do

However, if it is not a new document, check the document name of the document management table to check whether the same document name exists. If it does not exist, it is treated as an error. If the same document name exists, the capacity of the document stored in the dynamic RAM 30 is determined. Compare the size converted by the number of sectors with the size of the "Maximum Used Sectors" in the Document Management table. If the "Maximum Used Sectors" in the Document Management Table is small, an error is processed. When cleared, store the data stored in the dynamic RAM on the floppy disk in the same way as the new document.

As described above, using the method of the present invention, the power for memory backup can be deleted, and the dynamic RAM can be used instead of the static ram as the work area, thereby reducing the cost and the size of the dynamic ram is larger than the size of the static ram. Small size can reduce the size of the printed circuit board.

In addition, since working documents using the same memory as the capacity of one document is kept on a floppy disk, there is an effect of minimizing the memory.

Claims (1)

CPU 10 for comparing and judging data input by a program; address 20 for latching each system-specific address signal output from the CPU; dynamic RAM 30 serving as a temporary storage device; A floppy disk controller for controlling a floppy disk driver, which will be described later, and an address decoder 50 for receiving a program ROM 50 in which a program of the present invention is embedded, the address latch output signal, and outputting a selection signal of each memory and a peripheral controller. 60) and a floppy disk driver 70 controlled by the floppy disk controller and capable of accessing data on the disk according to a drive (DRJVER) with a data storage floppy disk called a diskette and an LCD controller for controlling the LCD to be described later ( 80) and an LCD 90 for displaying input data and a keyboard to be described later. A document management table in a memory typewriter comprising a keyboard controller 100 for inputting data, a keyboard 110 for inputting data, a printer driver 120 for driving a printer to be described later, and a printer 130 for printing input data. Set the "Maximum Used Sectors" to the number of sectors with the same capacity as the dynamic RAM 30, the first step of specifying the size of the document, and confirming whether it is a new document after the end of the document. Document in a memory typewriter equipped with a floppy disk driver characterized by the second step of storing on a floppy disk and the third step of updating the same document with new data if the document already exists. How to manage.

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