JPH0330025A - Portable terminal equipment - Google Patents

Abstract

PURPOSE:To eliminate the need of storing an application program in an external storage device and to suppress the mounting memory to the necessary minimum by providing a control program in which the application program is resident. CONSTITUTION:A BOOT program A is started by a fundamental input/output program 14, and an IO and a resident management program D, etc., are read out onto a main storage device 11 and controlled. In this state, an application program (d) does not exist in the main storage device 11, therefore, the resident management program D reads out the application program (d) through a communication equipment 15 and stores it on the main storage device 11. Even if the application program is ended and a power source is disconnected, it does not occur that the storage contents in the main storage device 11 disappear by a backup power source unit 12, it becomes unnecessary to read out the application program again, and the mounting memory can be suppressed to the necessary minimum.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a mobile terminal device equipped with MS-DOS.

BACKGROUND OF THE INVENTION FIG. 2 shows the structure of a conventional mobile terminal device equipped with MS-DOS. In FIG. 2, 1 is the main storage device, which is an area where programs read from the external storage device 4 are executed, and 10.a. sys,b MSDOS.
SYS, c COMMAND. By resident COM, execution of application program d, management of free space e, and control of external storage device 4, communication device 5, and input/output device 6 are performed through three basic input/output control programs. Here, the power supply device 2 is independent and only supplies power to each device, except for activating the basic input/output control program when the power is turned on. The basic input/output control program 3 is stored in a non-volatile memory and will not disappear even if power is not supplied.

Next, the operation of the above conventional example will be explained. In FIG. 2, power is supplied to all devices by the power supply device 2, and the basic input/output control program 3 is started. The basic input/output control program 3 is stored in the BOO of A from the external storage device 4.
The T program is read and temporarily expanded onto the main memory 1, and control is transferred to the BOOT program. The BOOT program is B's IO. SYS (input/output control program), MSDOS in C. SYS (operating system),
D's COMMAND. COM (man-machine interface) is read from the external storage device A, expanded and made resident on the main memory 1. Then, COMMAND of C of the man-machine interface. COM waits for command input. By inputting the name of the application program file E here, the user can read the application program from the external storage device 4 to the free area e on the main memory 1 and execute it.

When the processing of the application program is completed, the system waits for command input from the man-machine interface again, and the area d used for executing the application program is released and becomes a free area. Therefore, when starting the application program again, the data is read from the external storage device again. Also, if the power supply 2 is disconnected while the application program is running, the contents of the main memory 1 will be erased.
Start up the power supply device 2 again and turn on I'D. SYS
, MSDOS. SYS. COMMAND. It was necessary to read COM and start an application program.

Problems to be Solved by the Invention However, in the above-mentioned conventional mobile terminal device equipped with MS-DOS, since the application program is read and executed from the external storage device, the same application program may be temporarily (during execution of the application program) , exists in both external storage and main storage,
There was a problem that the usage efficiency of the storage device was very poor.

Generally, a mobile terminal device has an external storage device within the terminal body, and in order to reduce the size and weight, the external storage device uses a RAMDISK using semiconductor memory.

The cost of RAMDISK is very high compared to magnetic media. The present invention solves these conventional problems, and aims to provide an excellent MSDOS-equipped mobile terminal that does not require storing application programs in an external storage device.

Means for Solving the Problems In order to achieve the above object, the present invention connects a backup power supply device to the main storage device to prevent storage contents from being erased even if the power supply from the power supply device is stopped.

further i;:COMMAND. A COMcD resident management program is resident therein, and the resident management program is provided with the following four functions, so that the Aburikashin program resides in the main storage and can be restarted. .

(2) Read and store the application program directly from the communication device into the main memory rather than from the external storage. (For storage, acquire the necessary storage area.) ■ After the application program has finished processing, without releasing the storage area acquired in ■, the basic input/output program issues a disconnection signal to the power supply. Turn off the power to the mobile terminal device.

■ If the user requests to turn off the power while the application program is running, the input/output device reads the request, finishes the execution of the application program, and turns off the power to the mobile terminal device in the same way as in ■. .

(2) When the power is turned on, if the application program is already stored on the main memory, the application program is executed; if the application program is not stored yet, the operation (2) is performed.

In addition, the basic input/output control program changes the control immediately after the power is turned on from the conventional method, and determines whether or not the resident management program is stored in the main storage, and if it is stored, Control is transferred directly to the resident management program, and if it is not stored, the BOOT program is started as before, and the IO. SYS. MSDOS. SYS
Load COMMAND. Instead of COM, the resident management program is read out and stored in the main memory, and then control is transferred to the resident management program.

Effects The present invention has the following effects due to the above structure.

■ When the power is turned on from the initial state, there is no resident management program in the main storage.

Therefore, the basic input/output program is BOOT as before.
The program is started and the IO. SYS
, MSDOS. SYS and the resident management program are read and control is transferred to the resident management program.

■ In this state, the application program does not exist in the main memory. Therefore, the resident management program
Reads the application program from the communication device,
Store directly on main memory.

■ When the application program ends and the user requests power off, the application program ends and the power is turned off. At this time, since the backup power supply device supplies power to the main storage device, the contents stored in the main storage device will not be erased.

Therefore, when the power is turned on again, the application program can be started without having to read it again.

Embodiment FIG. 1 shows the structure of an embodiment of the present invention. In FIG. 1, reference numeral 11 is a main storage device, which is usually an IO.
MSDOS of SYS, b. A resident management program SYS, C and an application program d reside permanently.

In addition, the storage contents of 11 and 13 are always retained by the backup power supply device 12. 13 is an external storage device,
Mainly stores data files. 14 is a basic input/output control program that controls all hardware and MS-
Start DOS. Reference numeral 15 denotes a communication device that sends and receives data to and from external workstations and downloads application programs. 16 is an input/output device that outputs messages and inputs data required by the application program. A power supply device 17 supplies power to the main storage device 1, the communication device 15, and the input/output device 16, and determines the end of the application program based on a cutoff signal 19 and turns off the power.

Next, the operation of the above embodiment will be explained.

■ Downloading the Abbreviation Program When the power supply device 17 is activated, the activation signal 18 activates the basic main input/output control program 14 . The basic input/output control program 14 checks the state of the main storage device 11 (whether a resident management program exists or not), and if it does not exist, calls the BOOT program of A from the external storage device 13 and performs the IO of B. ．． MSDOS of SYS-C. SYS and the resident management program D are expanded to the main storage device 11. Thereafter, control is transferred to the resident management program C. The resident management program checks the existence of the application program d, and if it does not exist, starts the communication device 15,
Download the program. At the time of downloading, a part of the header of the MSDOS executable file (application program) is interpreted, and a main memory for executing the application program is secured. When the download is finished, the resident management program D stores the start address of the application program, performs the initial processing necessary to start the application program d, and issues a disconnection signal 19 to the power supply 17 through the basic input/output control program. , disconnect the power.

(i) Startup of third party program After power is turned on, resident management program C transfers control to the start address of application program d stored at the time of download completion, and starts application program d.

■ Termination of application program d.

When an OFF request 1o is issued from the input/output device 16 while an application program is being executed, the basic input/output control program 14 notifies the resident management program C that the OFF request has been made. The resident management program D terminates the processing of the application program d, issues a disconnection signal 19 through the basic input/output control program 14, and turns off the power.

■ Restarting application program d Starting up immediately after downloading the program You can restart in the same way as ■.

In this way, according to the embodiment described above, since the resident management program D remembers the start address of the application program d when the program is downloaded, it is possible to start the application program d without calling it again when the program is restarted. It has the advantage of Furthermore, since there is no need to store the application program d in the external storage device 13, the memory of the mobile terminal can be kept to the minimum necessary.

Effects of the Invention As is clear from the above-mentioned embodiments, the present invention allows the application program to be stored directly in the main memory, eliminating the need to store the application program in the external storage and making the implementation easier. The amount of memory required can be kept to the minimum necessary.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a mobile terminal equipped with MS DOS according to an embodiment of the present invention, and FIG. 2 is a schematic block diagram of a conventional terminal. 11...Main storage device, 13...External storage device, 14...Basic input/output control program,
7...Power supply device, 8...Start signal, 9
......Disconnection signal, 10...OFF request signal, A...BOOT program, B...
・10. SYSSC...MSDOS. SYS,
D... Resident management program, E... Data file, a - .= I O . S Y
S, b −= − M S D O S . SYS
, c... Resident management program, d...
Abbreviation program 1, e...Free space.

Claims (1)

[Claims] A mobile terminal device is provided with a control program that makes an application program resident, and can be restarted without reading the application program from an external storage device again after execution of the application program is finished.