JPH05100862A - Data processor - Google Patents

Abstract

PURPOSE:To start a system without the occurrence of an error even if a data disk is installed on an external file device whose access priority is high from the external file device, etc., where a system disk is installed in a data processor such as a personal computer. CONSTITUTION:At the time of accessing plural external file devices 17, 18, 20, 22 and 23 accompanied by ON of a power switch 15 by a control part 11 in accordance with prescribed priority managed by an external file device management part 14, a data judgement part 13 judges whether the medium of the external file device being an access object has a system file or not. When it does not have the system file, the external file device having subsequent priority is set to be the access object, and the external device having the system file is retrieved so as to read a system program.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device such as a personal computer to which a floppy disk (FDD) or an IC card can be connected as an external file device.

[0002]

2. Description of the Related Art As described above, in a personal computer to which a plurality of external file devices can be connected, when the system is started up when the power is turned on, each external file device is accessed according to a preset priority order. Then, the startup program is read from the first external file device in the medium mounted state, and the system startup processing is executed.

That is, for example, in addition to a built-in hard disk, a built-in FDD and an external FDD are provided as external file devices, and when the access priority is defined as external FDD → built-in FDD → hard disk, the external When the floppy disk is not mounted on the attached FDD, the startup program is read from the floppy disk mounted on the built-in FDD. Therefore, the system startup program must exist for the first external file device that is in the disk mounted state.

[0004]

However, an external file device having a higher access priority, in this case, an external FDD is attached with a data disk, and an external file device having a lower priority, in this case, a built-in FDD. When the system disk is mounted to the first external file device in the disk mounted state, that is, the external FD
Since the reading process of the system start-up program is executed for the data disk loaded in D, an error occurs and the system cannot be started up.

The present invention has been made in view of the above problems,
For example, even if a data disk is attached to an external file device having a higher access priority than the external file device to which the system disk is attached, the data processing device can start up the system without causing an error. The purpose is to provide.

[0006]

That is, the data processing apparatus according to the present invention is connectable to a plurality of external file devices, and external file access means for accessing the plurality of external file devices according to a predetermined priority order. And a system file determining means for determining whether or not a system file exists in the external file device accessed by the accessing means, and a system program is read from the external file device for which the system file is determined to exist by this determining means. A system file reading means is provided.

[0007]

That is, when a plurality of external file devices are accessed according to a predetermined priority order when the power is turned on, it is determined whether the medium of the external file device to be accessed has a system file, and the system file is saved. If not, the next priority external file device is set as the access target, the external file device having the system file is searched, and the system program is read to set the data file in advance to the external file device having the higher priority. However, the system can be easily started up.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing the system configuration of a data processing apparatus. This data processing apparatus includes a personal computer 1 as its central device.

This personal computer 1 is used as a portable book type personal computer, for example, and has a keyboard 2 and a liquid crystal display unit 3 in a main body case, and an IC card mounting unit 4 on the right side of the keyboard 2 side. ..

On the outer peripheral side surface of the main body case of the personal computer 1, connection terminals for a plurality of peripheral devices are provided, for example, an expansion disk driver 5 and a stationary expansion unit (platform) 6 are connected. The expansion unit 6 is further provided with an expansion disk mounting portion 7.

Here, an IC card 8 can be mounted in the IC card mounting portion 4 of the personal computer 1, and two floppy disks (external FDD) 9a, 9b are mounted in the expansion disk driver 5. Can be mounted, and further, the expansion disk mounting portion 7 of the expansion unit 6
Includes one floppy disk (Platform FD
D) 10 can be mounted.

FIG. 2 is a block diagram showing the configuration of an electronic circuit in the data processing apparatus. The control unit 11 includes an internal RAM 12, a data judgment unit 13, and an external file in addition to the key input unit 2 and the display unit 3. The device management unit 14 is connected, and the power supply signal from the power switch 15 and the reset signal from the reset key 16 are supplied to the control unit 11.

On the other hand, the control section 11 has a first floppy disk control section 17 for performing disk control in the expansion disk driver 5, and a second floppy disk control section in the expansion disk mounting section 7 of the expansion unit 6. A floppy disk control unit 18, a RAM disk driver 20 for writing / reading the built-in RAM disk 19, a ROM disk driver 22 for reading / writing the built-in ROM disk 21, and an IC card 8 in the IC card mounting unit 4. IC card drivers 23 for writing / reading operations are connected as external file devices. Then, the control unit 11
Includes a BIOS (Basic Input Output System) 2 for controlling access to the above external file devices.
4 is provided.

Here, in each of the above-mentioned external file devices, access priorities at the time of system startup upon power-on are preset, and in this embodiment,
The settings are made in the order of the first floppy disk control unit 17-> the second floppy disk control unit 18-> IC card driver 23-> RAM disk driver 20-> ROM disk driver 22.

That is, the access priority is determined in principle in the order of removable file media → not removable and writable → not removable and read-only.

The internal RAM 12 holds, for example, a system program read from an external file device and processing data during program execution.
The control unit 11 controls writing / reading of data to / from the M12 and its addressing control.

The data determination unit 13 determines whether or not a system file exists in the file medium of the external file device to be accessed in the access process corresponding to the above-mentioned access priority order with each external file device when the power is turned on, for example. That is, when the MS-DOS system is used, it is determined whether or not the IO / SYS and MSDOS / SYS exist, and the determination result signal of the system file in the data determination unit 13 is controlled. It is output to the unit 11.

The external file device management unit 14 includes a control unit 1.
1 manages the connection state of each external file device with respect to 1, and identifies the external file device corresponding to the system file used for system startup. The file management information in this external file device management unit 14 is the control unit. It is stored and managed through 11.

FIG. 5 shows the I used in the data processing device.
The data storage format of the C card 8 is shown. The data storage format of the IC card 8 is constructed in the same manner as the data storage format of the floppy disk. The disk access processing is performed in the same manner as the disk control units 17 and 18 and the memory disk drivers 20 and 22.

In this case, a partition area is artificially provided at the beginning of the data storage area in the IC card 8, and then a directory area, I
A PL (Initial Program Loader) area, an IO / SYS area, and an MSDOS / SYS area are sequentially provided, and have the same format structure as the hard disk. next,
The operation of the data processing device having the above configuration will be described. FIG. 3 is a flowchart showing a system start-up process when the power of the data processing device is turned on. FIG. 4 is a flowchart showing the checking process of the IC card format accompanying the system start-up process of the data processing device.

Here, I for starting up the system
The system file in which the PL (Initial Program Loader) is stored is the IC card 8 mounted in the IC card mounting unit 4, and the other floppy disks 9a, 9 mounted in the expansion disk driver 5 and the expansion disk mounting unit 7.
b, 10, RAM disk 19, ROM disk 2
1 is a data file in which an arithmetic program, various data, etc. are stored.

That is, when the power switch 15 of the data processing device is turned on, first, the control unit 11 performs an initialization process and then an IC card format check process (steps S1 and S2).

That is, the control unit 11 sends the I through the IC card driver 23 based on the connection management data of each external file device managed by the external file device management unit 14.
Whether the memory data of the IC card 8 mounted on the C card mounting unit 4 is accessed to determine whether or not it has a specific format,
In this case, the presence / absence of the “partition area” is determined. When it is determined in the format check of this IC card that the “partition area” is present, the control unit 11 connects the IC card 8 to the hard disk. It is determined that the BIOS is present, and the BIOS is set to access (steps A1 to A3).

In this way, when the access means for the IC card 8 is determined by the format check of the IC card 8, based on the connection management data of the external file device managed by the external file device management unit 14,
Each external file device is sequentially accessed according to a preset access priority (step S3).

In this case, the control unit 11 first causes the floppy disk (external FDD) 9 mounted on the expansion disk driver 5 through the first floppy disk control unit 17.
a and 9b, the floppy disks 9a and 9b are data files, and when the data judging unit 13 judges that the floppy disks 9a and 9b are not system files, the external file device having the next priority,
That is, the disk access to the floppy disk (platform FDD) 10 mounted on the expansion disk mounting portion 7 is performed through the second floppy disk controller 18 (steps S4 and S5).

Then, if the floppy disk accessed through the second floppy disk control unit 18 is a data file and the data judgment unit 13 judges that the floppy disk is not a system file, the external file device which is given the next higher priority, That is, the IC card driver 23
IC card 8 attached to the IC card attachment section 4 through
Is performed as a hard disk (steps S4 and S5).

Here, in the access data from the IC card 8, since the files of IO / SYS and MSDOS / SYS exist, the data judging unit 13 makes the I
When it is determined that the C card 8 is a system file,
The control unit 11 further includes an IP stored in the IC card 8.
L (Initial Program Loader) is read and once internal R
It is written to the AM 12 (steps S4 → S6).

As a result, in the control unit 11, the internal RAM is
The system program is read based on the IPL stored in 12, and the system start-up process is performed (step S7).

Therefore, according to the data processing device having the above-mentioned configuration, the external file device management section 14 manages the plurality of external file devices 17, 18, 20, 22, 23 when the power switch 15 is turned on. When accessing by the control unit 11 according to a predetermined priority order, the data determination unit 13 determines whether or not the medium of the external file device to be accessed has a system file. Since the priority external file device is set as the access target and the system file is retrieved by searching the external file device having the system file, it is easy to set the data file to the external file device having the high priority in advance. The system can be started up.

[0030]

As described above, according to the present invention, a plurality of external file devices can be connected, and external file access means for accessing the plurality of external file devices according to a predetermined priority order, and this access means. A system file judging means for judging whether or not a system file exists in the external file device accessed by the system, and a system file reading means for reading a system program from the external file device judged by the judging means to exist. Since it is configured with, the system can be started up without error even if the data disk is attached to an external file device with a higher access priority than the external file device to which the system disk is attached. Will be possible.

[Brief description of drawings]

FIG. 1 is an external view showing a system configuration of a data processing device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an electronic circuit in the data processing device.

FIG. 3 is a flowchart showing a system start-up process when the power of the data processing device is turned on.

FIG. 4 is a flowchart showing an IC card format check process accompanying the system startup process of the data processing device.

FIG. 5 is a diagram showing a data storage format of an IC card used in the data processing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Personal computer, 2 ... Keyboard, 3 ... Liquid crystal display part, 4 ... IC card mounting part, 5 ... Expansion disk driver, 6 ... Expansion unit (platform), 7 ...
Expansion disk mounting section, 8 ... IC card, 9a, 9b ... Floppy disk (external FDD), 10 ... Floppy disk (platform FDD), 11 ... Control section, 12
... internal RAM, 13 ... data determination section, 14 ... external file device management section, 15 ... power switch, 16 ... reset switch, 17 ... first floppy disk control section, 18 ...
Second floppy disk controller, 19 ... RAM disk,
20 ... RAM disk driver, 21 ... ROM disk, 22 ... ROM disk driver, 23 ... IC card driver, 24 ... BIOS (Basic Input Output System)
.

Claims (1)

[Claims] 1. A data processing device to which a plurality of external file devices can be connected, wherein an external file access means for accessing the plurality of external file devices according to a predetermined priority, and a system for accessing the external file device by the access means. A system file judging means for judging whether or not the file exists, and a system file reading means for reading the system program from the external file device judged by the judging means to have the system file. Data processing device.