JPH0535889B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information processing device, for example, an information processing device in the form of a data terminal device such as a portable personal computer having a battery for memory backup or driving. It is related to.

[Conventional technology]

In this type of information processing equipment, the power switch does not directly turn off the power to the system, but instead notifies the control unit that the power switch has been turned off, and uses its software to turn off the power to the system. There is something configured like this. In other words, in such conventional information processing devices, the control unit is notified by an interrupt signal that the power switch has been turned off, and the control program that specifies the operation of the control unit accepts the interrupt signal and executes the interrupt signal necessary to stop the system. The system was powered off after performing certain operations.

[Problem that the invention seeks to solve]

However, with this configuration, the application program that operates the device is not notified that the power switch has been turned off.
For example, it has been extremely difficult to take sufficient measures when it is desired to continue executing an application program from the time the power was turned off the next time the power is turned on.

[Means for solving problems]

SUMMARY OF THE INVENTION An object of the present invention is to solve this problem and provide an information processing device with high operability by allowing the execution of an application program that was interrupted when the power is turned off to be immediately continued when the power is turned on again. shall be.

Therefore, the present invention includes a power switch, a detection means for detecting the state of the power switch, a power control means capable of stopping the power supply, and a data storage capable of storing data regardless of the stoppage of the power supply by the power supply control means. a storage means; a data processing means for processing data according to an application program;
In the course of the data processing, when the power switch is turned off, the interrupt processing causes the application program to restart when the power is turned on again, according to the interrupt processing registration instructions written in the application program. storing data for continuing data processing in the storage means;
The apparatus is characterized by further comprising a continuation preparation means for instructing the power supply control means to stop supplying power after the storage.

[Effect]

That is, according to the present invention, when the power switch 100 is turned off while an application program is being executed, the power supply is stopped after saving the data necessary to enable execution to continue when the power is turned on again. Therefore, data processing can be continued quickly after the power is turned on again.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

FIG. 2 shows an embodiment of the information processing apparatus of the present invention. Here, 1 is a CPU in the form of a microprocessor that controls each part according to the processing procedures shown in FIGS. 4 to 6, and 2 is a main memory, which is a main memory.
3 is a memory pack which is auxiliary memory. 4 is a system memory in which a control program such as that shown in FIG. 4 is placed, and is composed of a ROM. 5 is a keyboard with keys for entering various data, 6 is a CRT
7 is a power supply control circuit which will be described later in FIG. 3, 8 is a battery as a power source,
9 is a power switch, and B is a bus line connecting each section 1 to 7. It has the same configuration as a battery-powered computer.

FIG. 3 shows an example of the configuration of the power supply control circuit 7 in FIG. 2. Here, 10 is a power cut-off instruction signal from the CPU 1, 11 is a one-shot pulse circuit including a transistor, 12 is a flip-flop for power control, 13 is a flip-flop that receives the power cut-off instruction signal, 14 is a transistor for turning on/off the power, 15 is the power supply for the system
Vcc output, 16 is an interrupt request signal (IRQ) output that notifies the CPU that the power switch 9 has been pressed, and 17 is a power line for backing up the contents of the memory pack 3 when the power is cut off.

In FIG. 3, one shot pulse circuit 11
is always in operation and generates one pulse each time the power switch 9 is pressed, supplies it to the CK input terminal of the power control flip-flop 12, and outputs it as the IRQ signal 16 to the CPU 1.

When the battery 8 is connected to this circuit, the output of the flip-flop 12 becomes "0" and the power supply control transistor 14 is turned off. When the power switch 9 is pressed in this state, a pulse is generated by the one-shot pulse circuit 11, which is sent to the CK input of the flip-flop 12, the output of the flip-flop 12 becomes "1", and the transistor 14 is therefore turned on. , power to the system
Vcc15 is supplied.

Next, when the power switch 9 is pressed again in this state, the pulse generated by the one-shot pulse circuit 11 is supplied to the flip-flop 12, but since its D input is "1", the output does not change, and the output does not change. At this point, the system still has Vcc1
5 is supplied. On the other hand, the pulse is transferred to the CPU 1 as an interrupt request signal IRQ16 to notify that the power switch 9 has been pressed.

When Vcc15 is on and the system is operating, when the power cutoff instruction signal 10 is supplied from the CPU1, the Q output and CL input of the flip-flop 13 become "0", and therefore the output becomes "0". When the transistor 14 turns off, the supply of Vcc 15 is stopped for the first time, and the system is powered off.

In this way, if you use the circuit shown in Figure 3,
It becomes possible to manage or control the power on/off of the system using software.

FIG. 4 shows an example of a power-off processing procedure according to this example, and this procedure is stored in the system memory 4. Further, FIG. 5 shows an example of processing of an application program applicable to this example, and FIG. 6 shows an example of processing at the time of interruption to the application program. The data may be expanded into the main memory 2 from an external storage via the bus line B, or expanded into an appropriate storage area of the memory pack 3. Alternatively, as long as it is fixed, it may be developed in a memory configured by a ROM like the system memory 4.

Processing at power-off in this embodiment will be explained using these figures.

First, when the power switch 9 is pressed while the device shown in the second figure is operating, and the IRQ signal 16 is supplied to the CPU 1, the process shown in the fourth figure is started, and the application program being executed at that time (see FIG. 5) In the process, it is determined whether interrupt processing is registered (step S1). This determination can be made, for example, by referring to the storage area (interrupt processing registration area) of the memory pack 3 shown in FIG. Here, if the determination is affirmative, the interrupt processing routine shown in FIG. 6 is activated (step S3), and this procedure is ended.

On the other hand, if it is not registered, the process jumps to the power shutdown processing procedure and performs the appropriate system termination processing (step S5).
After performing this, a power-off instruction signal is output to the flip-flop 13 shown in the third figure (step S7). This will cut off power to the system.

To register the interrupt processing (Fig. 6), as shown in Fig. 5, before important data processing (step S13) in the application program, for example, register the start address of the storage area that stores the interrupt processing procedure. This can be done by storing it in the interrupt processing registration area (step S11). Then, after processing important data, the registration may be canceled (step S15).

Here, the processes of steps S11 and S15 can be placed before or after data processing desired by the user. This data processing may be, for example, a process in which an operator inputs numerical information etc. using the keyboard 5 when an application program is executed, and related master data etc. are rewritten accordingly.

When the switch 9 is pressed during such important data processing (step S13), the information input by the operator and the data rewritten based on it are stored in the memory pack 3 in the interrupt processing shown in FIG. If necessary, the address of the application program being executed at the time the switch 9 is pressed is registered in the program address storage area (step S21). Memory pack 3 has battery 8
Since it has been backed up by , it can be prepared for continuation when the power is turned on again. After such a continuation process, the power cutoff process shown in FIG. 4 is started (step S23), and the procedure is ended. The manner in which the power of the system is cut off in response to the activation is as described above.

Note that the present invention is not limited to the illustrated configuration, but can be applied extremely effectively and easily to any type of information processing device. For example, in the above example, the power supply control circuit was configured as shown in the third diagram.
Of course, any configuration can be used as long as it is possible to notify the control unit by an interrupt that the power switch has been turned off, and the power to the system can be cut off by software.

Further, in the above example, the battery 8 is shared for memory backup and system drive, but the system may be driven using a commercial power source.

Furthermore, the memory that is backed up is RAM
Although the present invention is in the form of a memory pack composed of the following, it may also be in the form of a device that performs magnetic storage.

〔Effect of the invention〕

As described above, according to the present invention, execution of an application program interrupted when the power is turned off can be immediately continued when the power is turned on again, thereby realizing an information processing apparatus with high operability. Furthermore, the application program can automatically instruct whether or not to save data when the power switch is unexpectedly turned off (data necessary for continued processing when the power is turned on again).

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of the present invention, FIG. 2 is a block diagram showing an embodiment of the information processing apparatus of the present invention, and FIG.
The figure is a circuit diagram showing an example of the configuration of the power supply control circuit in Fig. 2, Fig. 4 is a flowchart showing an example of the power cutoff processing procedure by the device shown in Fig. 2, and Fig. 5 is an application example applicable to this example. FIG. 6 is a flowchart illustrating an example of a suspension processing procedure for an application program. 1...CPU, 2...Main memory, 3...Memory pack, 4...System memory, 5...Keyboard, 6...Display unit, 7...Power control circuit, 8...Battery, 9...Power switch .

Claims (1)

[Scope of Claims] 1. A power switch, a detection means for detecting the state of the power switch, a power control means capable of stopping the power supply, and data storage possible regardless of the stoppage of the power supply by the power supply control means. a data processing means for processing data in accordance with the application program; and an interrupt processing when the off-state of the power switch is detected during the data processing process. In accordance with the instruction to register interrupt processing, data for continuing data processing of the application program when the power is turned on again is stored in the storage means, and after the storage, a command is given for the power supply control means to stop supplying power. An information processing device characterized by comprising: continuation preparation means. 2. The continuation preparation means determines whether interrupt processing is registered in the application program, and if it is registered,
Instructing to stop the power supply after storing the data in the storage means, and when the data is not registered, instructing the power supply to stop without storing the data in the storage means. An information processing device according to claim 1, characterized in that: 3. A claim characterized in that the continuation preparation means cancels the storage process of the data in the storage means in accordance with an instruction to cancel the registration of interrupt processing written in the application program. The information processing device according to item 1 or 2 of the range.