JPH0452817A - Device for restarting program interruption - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a program interruption/resuming device for information processing equipment, and in particular, when the information processing equipment is shared by multiple users, when the power is turned on, the mosquito user The present invention relates to a program interruption/resumption device suitable for restarting a program corresponding to a program.

[Conventional technology]

Information processing devices such as personal computers are increasingly required to have a function of restarting program execution from exactly the same program execution state that was interrupted when the power was turned off, when the power is turned on. With such a program interrupt/resume function, the user does not need to start the program from the beginning when the power is turned on, and can immediately resume the program where it left off. As a result, the effectiveness of information processing operations using information processing equipment is increased.

As one of the conventional techniques related to the program interruption/resumption function as described above, there is, for example, a device described in Japanese Patent Laid-Open No. 169218/1983. This saves and stores the program execution state in a storage device when the WF is powered off, and restores it when the power is turned on. Specifically, when the power off switch is removed, an interrupt signal is output to MPIJ before the power is cut off. MPIJ executes an interrupt processing routine and saves all registers of MPtl to a pre-secured area of the main memory. Furthermore, the I10 registers and states of all peripheral devices are also saved in this area.

That is, in addition to the programs and data being executed, the main memory also stores the status of the MPLI and the air blower. After the above operations are completed, turn off the power.

The main storage device and display memory are backed up by a backup power source such as a battery even when the t# is interrupted, thereby maintaining the program execution state. When the power is turned on, the state of the MPLI and air blower stored in the main memory is checked back, and after completion, execution of the program is resumed. In the above program, 1f was interrupted when the power was turned off, and the same program execution state77) et al.
Program execution can be resumed when turned on.

[The spoon that the invention attempts to solve]

The above-mentioned prior art is commonly used in cases where buried equipment is occupied by the person who built it. That is, when the user turns on the power to the information burying device, the program that is restarted is the program whose execution was interrupted by the most frequent user. L71) L. If multiple users share information processing equipment (for example, a desktop personal computer), if the conventional technology is used as is,
The following problems (1-3) arise.

(1) After user A interrupts the execution of program A (turns off the power), another user B tries to start another program B from the beginning, and tI! Consider the case where A is turned on. At this time, the execution of program A that was interrupted by user A will obviously be resumed. If program A is executing a process of confidential importance, this will be known to user B.

In the worst case, there is a possibility that user B may be inadvertently or intentionally manipulated.

(2) When someone else's program A is restarted as described above, user B will start program B after forcibly or normally ending the execution of the program. That is, program B is loaded into the main memory group F.

Therefore, the execution state of the program that was previously stored in the main memory is lost.

(3) Continuing from the above, if user B interrupts the execution of program B (powers off) and then turns on the power, it is clear that program B will be restarted, and Program A is not what person A expected.

Although the above description assumes a case where there are two users, the same problem obviously occurs when there are three or more users.

An object of the present invention is to provide an apparatus that resumes execution of a program corresponding to a user when a plurality of users share an information processing device at 17 o'clock when the power is turned on.

Another object of the present invention is to provide a device that prevents the saved program execution state from being lost due to the execution of other programs.

Still another object of the present invention is to provide an arrangement that protects the FIk integrity of a program execution layer corresponding to each user.

[Means to solve the problem]

In order to achieve the above objects, the present invention maintains an extensive program execution status 1, that is, the execution status of the most recently interrupted program is stored in the main memory and display memory, and other program execution statuses are stored in the main memory and display memory. are stored in a non-volatile auxiliary storage device.

Further, in the present invention, when the power is turned off, the program execution status 11
When saving and storing (registers of the MPU and peripheral devices) to the main memory, a means is provided for saving and storing the program user's identification information as well.

Furthermore, in the present invention, means is provided for inputting identification information of the user who turned on the power when the power was turned on.

Furthermore, in the present invention, the identification information input when the power is turned on and the identification information of the program user stored in the main storage device and the auxiliary storage device together with the program execution status layer,
:il#4 Next, compare, and if there is a match, move R8 to restore the corresponding program execution state. This restoration method R restores the program execution state 1 stored in the auxiliary storage device, when the main storage I&! And the program execution state 1 stored in the display memory I is saved and stored in the auxiliary memory R&D in advance.

[Effect]

According to the present invention, the user inputs identification information when the power is turned on. Then, the program execution state layer corresponding to the identification information is called from the main memory and display memory, or the auxiliary memory, and execution is resumed. Therefore, execution of the program corresponding to the user who turned on the power can be resumed.

Further, according to the present invention, when calling up the program execution state 1 stored in the auxiliary storage device, that is, when loading it into the main storage device and display memory, the program execution state 1 stored in the main storage device and display memory Other program execution states are saved and saved in the auxiliary storage device. Therefore, the program execution layer is not lost due to execution of other programs.

Furthermore, according to the fIAI of this invention, execution of the corresponding program will not be resumed unless correct identification information is input, and therefore, the confidentiality of the program execution layer can be protected.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 shows the overall structure of this embodiment. At the opening of the park, ROM12, main memory 2, auxiliary memory 'I
t4 (70p disk, hard disk, etc.),
Real time clock 15, peripheral devices 13 (printer, mouse, communication device, etc.), keyboard 14, and display memory 3
is accessed by the MPT 111 via the system bus 20.

Password buffer 1 is for holding passwords input from keyboard 14, and is also accessed by MPtJll via system bus 20. The display 16 displays the contents of the display memory 3.

The switch circuit 7 is a power switch, and turns on/off the power supply to the power line 17 of the main tag. Specifically, when the switch circuit 7 is in the on state, power from the main power source 8 is supplied to the MPU 11, R012, Nesuke storage head 41, peripheral cover 13, keyboard 14, and password buffer 1 via the power line 17. , and the display 16.

At the same time, the sub power source 9 (such as a battery) is charged, and power from the main IE source 8 is also supplied to the main memory fi&2, real time clock 15, and display memory 3 via the power line 18. - 10,000, when the switch circuit 7 is in the off state 1, the power supply line 17J does not supply power from the main power supply 8;
However, power is supplied to the power supply line 11H by the stripping power supply 9. Therefore, even when the power is off, power is supplied to the main storage device 2 and display memory 5 to back up the program execution state 1.At the same time, the real time clock 15 is also backed up, but this retains the clock function. It's for a reason.

FIG. 2 shows an example of the configuration of the switch circuit 7 in FIG. 1. This is to allow the main power supply 8 to continue supplying power even when the power switch is turned off until the saving of the program execution state layer is completed. As shown in the figure, the switch circuit 7 includes a switch 25, a switch 26, a switch 27 . as well as.

It consists of a full-up resistor 28. The switch 25 and the switch 26 are interlocking switches, and when the user turns on/off the switch 25, the switch 26 is also turned on/off at the same time.
It will be turned off. The switch 27 is, for example, a relay switch, and the power off signal 24 (MPt in FIG. 1)
The operation of the switch circuit 7 will be described below. When the user turns on the switch 25, the switch 26 is also turned on, and power from the main power source 8 is immediately supplied to the power line 17. At this time, the power off signal 24 becomes high level, and the switch 27 is also turned on. On the other hand, the user
When the switch 26 is turned off, the switch 26 is also turned off, but the switch 27 is not turned off immediately and continues to supply power to the power supply line 17. The voltage level of the interrupt signal 23 is
The pull-up resistor 25 changes the level from low to high. The MPt) 11 in FIG. 1 receives this as the primary; performs the interrupt processing described below, and after completing the saving of the program execution state 1, sets the IE source off signal 24 (for example, interrupt end signal) to a low level; Rub, resulting in switch 2
7 is turned off, and the power supply to the power line 17 is cut off.

FIG. 3 shows a 70-chart of interrupt processing.

This is stored in the ROM 12J shown in FIG.
7. The processing contents will be explained below using the same 70-chart and FIG.

The contents of the password number buffer 1 are checked to check whether the password is held, that is, whether a password has been previously input.

If the information has been input, the process proceeds to step 33; if not, the process proceeds to step 32 (step 31).

Since the password has not been entered, a message is output on the display 16 to request the user to enter the password (step 32), and the password held in the password buffer 1 is saved in the main storage device 2. The area 221 is saved (step 33).

All registers in MPtJ11 are stored in i!
It is evacuated to area 22 (step 34).

All the registers of the peripheral device 13 and the registers of the real-time clock 1S necessary for restarting the program are saved to the save area 22 of the main storage device 2 (step 35).

The power off signal 24 is output to the switch circuit 7, and the main power supply 8
The power supply is cut off (step 36).

While the power is cut off, power is supplied to the main storage device 2 by the sub power supply 9, and the save area 22 and the user area 21 in which interrupted programs and data are stored are backed up. Furthermore, the display memory 3 is also backed up by the power reduction s9. From the above, the execution state of the interrupted program can be saved and stored with the password of the program user added.

FIGS. 4(a) and 4(b) show flowcharts of the geography executed by the MPL 11 when the source is switched on. This is also stored in the ROMI 2 in FIG. 1, and performs processing for restarting the execution of the program corresponding to the user who turned on the power.

The details of the process will be explained below using the same flowchart and FIG.

The variable t is set to the initial value O. In this embodiment, it is assumed that the user enters the password incorrectly, and the user is allowed to enter the password up to a predetermined number of times (three times). Therefore, the variable t is used as a counter indicating the same number of password inputs (step 41).

The value of variable t is increased by 1 (step 42).

If the value of the variable t, that is, the number of password inputs is within the third time, the process advances to step 45; otherwise, the process advances to step 44 (step 43).

The execution of the program is not restarted, so the program execution state stored in the main storage device 2 (saved area 22 and user area 21) and display memory 3 is saved to the auxiliary storage device 4. After the evacuation is completed, normal 7-system startup (hardware check, system program loading, etc.) is performed (step 44).

A message is output on the display 16 to request the user to input a password. At this point, the user enters the password using the keyboard 14. The entered password is held in password buffer 1 (step 45).

The contents of password buffer 1 are checked to see if a password has been entered. If it has been input, the process goes to step 47; if it has not been input (for example, if only the return key has been input), the process goes to step 44, where:
The time is measured using the real time clock 15, and if the password is not entered within the predetermined time, step 44
It is also possible to proceed to (step 46).

The password stored in the save area 22 of the main storage device 2 is extracted (step 47).

The extracted password is compared with the password held in the password buffer 11, and if they match, the process goes to step 49, and if they do not match, the process goes to step 5o (step 4a).

The passwords matched, so I started 11i! 12 and the program execution form 1 stored in the display memory 5 are the program execution forms 1 corresponding to the user J who turned on t*.

Therefore, all the registers of the MPt) 11, all the registers of the peripheral cover 13, and the register of the real-time clock 15 stored in the save area 22 are returned to their original state, and the program execution state 1 is restored. Then, execution of the interrupted program is resumed (step 49).

The passwords stored in the auxiliary storage device 4 are sequentially
Search, but check to see if there are any unsearched items. If there is a password, the process advances to step 51, but if there is no password, that is, if no password matching the entered password is found, the process returns to step 42 (step 50).

Among the passwords stored in the auxiliary storage device 4, one unsearched password is extracted (step 51).

Compare the extracted password with the password held in password buffer 1, and if they match, proceed to step 53; if they do not match, return to step 50 (step 53). The program execution status 1 stored in the auxiliary storage device 4 is a program execution status layer corresponding to the user who turned on the power.

Before restoring this, the program execution state stored in the main storage device 2 and display memory 5 is saved to the auxiliary storage device 4 (step 53).

The program execution status 1 corresponding to the password is returned to the main storage device 2 and display memory 3, and the program execution status layer is restored in the same manner as step 49, and program execution is resumed (step 54).

As explained above, this embodiment uses a password as user identification information, and can be easily implemented. Also, even if the user enters an incorrect password,
It is possible to re-enter within a predetermined number of times. By the way, instead of the user's responsibility in this embodiment, it is also possible to use the identification information of the program (for example, the program name) in the same way. In this case, the user named - can select a desired program execution layer from among a plurality of program execution layers and resume execution.

Other embodiments of the present invention will be described below with reference to FIGS. 85 to 7. FIG. 5 shows the overall configuration of this embodiment. In this system, the password buffer 1 in FIG. 1 is removed, and power is supplied to the main storage device 2 and display memory 3 via the t* line 17. Also,
New memory card 5 and card interface 6
will be established.

The memory card 5 (consisting of DRAM, SRAM, etc.) can be attached to and detached from the card/ink 7ace 6, and when attached, it supplies power to the main power source 8 via the power line 17. The device maintains 8 volumes of memory using a built-in battery or the like. Card interface 6 provides power via power line 17. The main storage device 2i is like the one shown in FIG. Region 22 is not provided, and switch circuit 7 performs exactly the same operation as described in FIGS. 1 and 21.

In this embodiment, the entire program execution status 1 is saved and stored in the memory card 5 by the interrupt processing executed by MPOll when the power switch is turned off. Also, when the power switch is turned on, the program execution status 1 stored in the attached memory card 5 is restored and program execution is resumed.

A 70-chart of interrupt processing is shown as the sixth factor.

The details of the processing will be explained below using the same flowchart and FIG.

The card Φ interface 6 is accessed to check whether the memory card 5 is installed.

The card interface 6 constantly monitors the installation status of the memory card S. If it is attached, proceed to step 65; otherwise, proceed to step 62 (step 61
) Since the memory card 5 is not installed, a message is output on the display 16 to request the user to install the memory card 5 (step 62).

Contents of main memory j&t2 (programs and data being executed)
The data is saved to the RAM memory card 5 (step 63).

The contents of display memory 3 are saved to memory card 5 (step 64).

MPt) All registers in 11 are saved to memory card 5 (step 65).

All the registers of the peripheral device 13 and the registers of the real-time clock 15 necessary for restarting the program are saved in the memory threat card 5 (step 66).

The power off signal 24 is output to the switch circuit wr7 to cut off the power supply from the main power source 8 (step 67).

Through the above steps, all program execution states are saved to the memory card 5. When the power is turned off or the memory card 5 is removed, the program execution state is maintained by a battery or the like.

FIG. 7 shows the last seven coaches executed by the MPt) 11 when the power is switched on.The contents of the process will be explained below using the same flowchart and FIG. 5.

The card interface 6 is accessed to check whether the memory card 5 is installed.

If it is attached, the process advances to step 72. If not, the program is not restarted and the system is started normally (step 71).

Program execution report 1 stored in memory card 5
, and restarts program execution (step 72).

According to this embodiment, the user can personally manage the memory card 5 in which the program execution letter 1 is stored. Also, there is no need to enter a password when turning on the power.
Inserting the memory card 5 itself corresponds to inputting the user's identification information.

〔Effect of the invention〕

According to the present invention, it is possible to restore the program execution state corresponding to the user identification information input when the power is turned on. Therefore, when a plurality of users share the information escape device, execution of the program corresponding to the user can be resumed when the power is turned on.

[Brief explanation of the drawing]

Figure 1 is a block diagram of one example of the present invention, and Figure 2 is a block diagram of one example of the present invention.
Figure 3 is a flowchart showing the interrupt processing in the embodiment shown in Fig. 1; Fig. 4 is a flowchart showing the processing when the power is turned on in the embodiment shown in Fig. 1; The figure is a block diagram showing another embodiment of the present invention, Figure 1Ii6 is a flowchart showing interrupt processing in the embodiment of Figure 35, and Figure lN7 is the embodiment 1 of Figure 5.
2 is a flowchart showing the processing when the power is turned on. 1... Password buffer, 2... Main memory R13... Display memory, 4... Auxiliary storage,
5...Memory card.

Claims (1)

[Scope of Claims] 1. In a program interruption/resuming device for information processing equipment, which saves and stores the state of a program being executed in a storage device when the power is turned off, and restores the execution state of the program when the power is turned on, comprising: Adding the identification information of the user of the program to the execution state of the program and saving it in the storage device.
a means for storing, a means for inputting identification information of a user who turned on the power when the power is turned on, and a means for inputting the input identification information;
Program interruption/resumption characterized by comprising means for sequentially comparing the identification information of the program user stored in the storage device and restoring the execution state of the corresponding program if there is a match. Device. 2. In claim 1, the inputted identification information is sequentially compared with the identification information of the user of the program stored in the storage device, and if there is no match, the identification information is sent to the user. A program suspending/resuming device comprising: means for requesting input of information; and means for activating the system when the identification information is input a predetermined number of times or more. 3. The program suspending and resuming device according to claim 1, further comprising means for starting the system if the identification information of the user is not input within a predetermined time. 4. The program interruption/resumption device according to claim 1, wherein the identification information of the program is used in place of the identification information of the user. 5. An apparatus for interrupting and resuming a program of an information processing device, provided with a removable storage medium, and means for saving and storing the execution state of the program in the storage medium when the power is turned off, and a means for saving and storing the execution state of the program in the storage medium when the power is turned on. An apparatus for suspending and resuming a program, comprising means for restoring the execution state of the program.