JPS6132174A - Electronic device - Google Patents

Abstract

PURPOSE:To obtain an electronic device having the capability of executing various jobs by storing a specific control program respectively to different ROM packs and fitting the ROM pack to the main body freely attachably and detachably. CONSTITUTION:A software control program such as a basic interpreter is stored in the ROM pack EXROM, which is connected to a main bus via an interface IF. The ROM pack EXROM is fitted freely attachably and detachably to the interface IF, and when it is loaded to the interface IF, a fixed address wriring a pass word specifying the ROM pack EXROM is assigned and a pass word is written in advance to a specific address in the assigned address. When the specific condition is satisfied, the main body transits to the control by the specific address of the ROM pack EXROM.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an electronic device that has the functions of an electronic typewriter and has other functions added, and in particular, an external readout device that can be easily attached and detached by an operator depending on the purpose. This invention relates to devices that allow access to power storage devices.

[Prior Art 1] Conventionally, so-called electronic typewriters have been known that have a text memory that can store typed documents and can print out the stored contents. However, this type of electronic typewriter mainly has a printing function and cannot perform other tasks.

Therefore, due to the demand for high added value, there has been a desire for the emergence of electronic equipment that not only satisfies the printing function of electronic typewriters but also can be used for other purposes.

[[(Target]) In view of the above-mentioned points, an object of the present invention is to provide a storage means storing a control program that can be attached to and detached from an electronic typewriter in order to effectively utilize the input/output functions of an electronic typewriter. An object of the present invention is to provide an electronic device in the form of an electronic typewriter that is versatile by being capable of performing not only printing processing but also other processing.

That is, in the electronic device of the present invention, the storage means storing the control program is detachably attached to the device main body, and when the storage means is attached to the device main body, the operation of the device main body is controlled by the control program stored in the storage device. It is something that will be migrated to be executed.

[Example 1 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an example of a schematic configuration of the present invention.

Here, KB is the keyboard and the alphabet A
-Z, an alphanumeric key AN consisting of numbers 0 to 8, a return key [RETURN], a cursor left shift key [←], and a cursor right shift key [→].

The CPU is a central processing unit in the form of a microprocessor, and is configured in the form of a sequential control circuit including, for example, a clock pulse generation circuit, a delay circuit, a gate circuit, and other logic circuits.

PRT is a printing device similar to a serial printer, which inputs keys from the keyboard KB and prints the letters and numbers corresponding to each key input on printing paper under the control of the print control signal CPRT from the central processing unit CPU. Print.

The DIS is a display device such as a dot matrix type liquid crystal display, and under the control of the display control signal CDl5 from the central processing unit CPU, the corresponding characters and numbers are displayed by inputting keys from the keyboard KB. do.

ROM is a read-only memory, and the central processing unit CPU is used for printing device PRT and display device D.
When supplying control signals to each device such as an IS, for example, the third
A group of microinstructions necessary for sequentially notifying the central processing unit CPU of the control procedure shown in the figure is stored.

RAM is a random access memory that can be read and written.
It has storage areas such as a display data memory DISP that stores display data to be displayed on the display device DTS, and a text memory TEX that stores character strings input from the keyboard KB. have Furthermore, the random access memory RAM has various pointers as described below.

XF is an interface section to which a so-called ROM puncture EXROM containing a read-only storage device is electrically and mechanically connected, and is in the form of a connector having terminals such as an address terminal, a chip select terminal, and a lead terminal.

The ROM pack EXROM has a function as an external memory, and is detachable from the interface section IF, that is, the main body of the apparatus, as described above. This ROM pack EXROM
For example, the ROM pack EXRO stores a software control program such as a basic interpreter, and also stores a ROM pack EXRO when installed in the interface section IF.
A fixed address is assigned to write a password for specifying M, and a password is written in advance at a specific address within this assigned address. Then, when this ROM pack EXROM is attached to the interface section IF and the conditions described below are satisfied, the main body of the apparatus shifts to control based on a specific address on the ROM pack EXROM.

BUS connects central processing unit CPU and read-only memory RO
M, random access memory RAM, and ROM
This is a pass line that is electrically connected to the interface section IF to which the hack EXROM is connected and is used to transfer memory addresses and data.

Next, regarding the operation example of the present invention shown in FIG. 1, reference will be made to FIGS. 2 and 8 showing an example of the key operation procedure of the keyboard KB, and FIG. 3 showing an example of a flowchart of the control processing process. explain.

First, in step 1 shown in FIG. 2, when the power is turned on with the ROM pack EXROM installed in the interface section IF, the address assigned to the ROM pack EXROM is specified in step S1. Address, e.g. 4000) 1 to 4
A password is stored at address 00FH, and it is determined whether the password can be read. Here, since the ROM pack EXROM is not installed in the interface section IF, the process moves to step S2.

In Stella 7'S2, random access memory RA
Clears the entire M, cursor pointer CP indicates the cursor position, and hent pointer HP indicates the print head position.
After storing "1 key" respectively, in steps S3 and S4, the display data in the display data memory DISP is displayed on the display device DIS while waiting for the next key to be pressed.

Next, when the key [A1 is pressed in hand j@2 and a key signal to that effect is input, it is determined in step S5 whether or not the key input signal is due to pressing of a character key. If it is determined that the character key was pressed, the process proceeds to step S6, where the input key code is stored in the position indicated by the data "1" in the cursor pointer CP in the display data memory DISP.
The cursor pointer CP is incremented by 1 and the process returns to step S3.

Next, the control processing of steps S3 and S4 is repeated, and the display content ``A'' corresponding to step 2 shown in the second sentence is
” is displayed on the display device D15.

Next, in step 3, press one key [B], IC],
When [D] and [E] are pressed in sequence and a key signal to that effect is input, the same control process as in step 2 is executed and the value of the cursor pointer CP becomes "6", and as a result, Display content “A” as shown in step 3 of Figure 2
BCDE” is displayed on the display device DIS.

Finally, in step 4, press the return key (RETURN).
], it is determined in step S5 that it is not a character key, and the key is pressed. to move to. In step S7, display data memory D! Data “A” in SP
BC[lE'' is printed by the printing device PRT, the printing paper is fed, and the print head is returned to the home position.Furthermore, in step S7, the display data memory DISP is cleared, and the cursor pointer CP and hent pointer HP are Store 1゛ in each.

Next, in step 5, the power is turned off (power cut off), and in step 6, a ROM pack EXROM in which a password is written in the first 16 bytes is installed in the interface section IF, and the power is turned on again. 400 of the first 16 bytes of the address assigned to the ROM bank EXROM for storing the password.
0) From address 1 to 400F) It is detected whether or not there is a password at address 1, and if a password is detected, the address 40 next to the address assigned for storing the password is
Jump to address 108 (step S8). and,
In the next step S9, the ROM and EXROM
The main body of the device is controlled by a control program written in, for example, a basic interpreter is executed. In addition,
Since the page and interpreter can be easily realized using conventional techniques, their explanation will be omitted.

Thus, according to the embodiment, the ROM pack EXROI'
1 is assigned a specific address in a certain range, and this ROM
An interface section IF for accessing the pack εXRQ)l is provided, and a ROM pack EXRON with a password written therein is installed in this interface section IF. Then, by turning on the power, the ROM pack EXRO
When the password written on M is detected, control of the main body of the apparatus is transferred to a control program stored in the ROM pack EXROM, and, for example, a basic interpreter is executed. Therefore, ROI! By installing the pack EXROM, it is possible to change the electronic typewriter from basic to computer software that can be executed as a tz verating system.

In this embodiment, the ROM pack EXROII+ contains a program that executes a basic interpreter, but the present invention is not limited to this. [Effects] As explained above, according to the present invention, the storage means storing the control program is made removable from the device main body, and the storage means is attached to the device main body. Since the main body of the device is driven by the control program stored in the storage means, various tasks can be performed according to the control program simply by replacing the storage means in which various control programs are stored. Therefore, a highly versatile electronic device can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a schematic configuration of the present invention. FIG. 2 is an explanatory diagram showing an example of the key operation procedure, and FIG. 3 is a flowchart showing an example of the signal processing process by the key operation. KB... Keyboard, AN... Alphanumeric key 1 FIETtlRN... Return key, CPU... Central processing unit, PRT... Printing device, DIS... Display device, ROM... Read only memory, RAM ...Random access memory, BUS.../
Hessline, XF...interface section, EXROM-ROM0M bar.

Claims (1)

[Claims] 1) An input means for inputting characters, a first storage means for storing characters input from the input means, a processing means for processing the characters, and printing the characters processed by the processing means. an apparatus main body having a printing means for printing, a second storage means storing respective control programs for the input means, the first storage means, the processing means and the printing means; and the input means,
a third storage means storing a control program and a password for at least one of the first storage means, the processing means, and the printing means; and a third storage means storing a password and a control program for at least one of the first storage means, the processing means, and the printing means; a detection means for detecting the password; and when detecting the password, controlling at least one of the input means, the first storage means, the processing means, and the printing means according to a control program stored in the third storage means. An electronic device characterized by comprising: means for instructing the user to do the following: 2) The electronic device according to claim 1, wherein the third storage means is a ROM pack.