JPH0519881A - Electronic equipment - Google Patents

Abstract

PURPOSE:To reproduce a state again even in an incomplete resuming state by performing resuming operation in stages and performing power-source control, device by device. CONSTITUTION:The electronic equipment is equipped with a means which controls power supply to the individual devices when the use of the computer device 1 of the electronic equipment consisting of the devices and the computer device 1 with a built in memory(RAM) 2 is quitted and a means which turns OFF power of the devices, one by one, in stages. Further, the equipment is provided with a means which saves the current operation state of the computer such as the states of the devices and memory contents when power supply is stopped and a means which restores the original operation state when the electric power is supplied again. When the restoring operation is performed, information is written back for only devices which require the restoring operation according to the recording contents. Consequently, the equipment is put back into the original operation state even in the incomplete resuming state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic apparatus which controls the power supply of each device and reproduces the status of a resume.

[0002]

2. Description of the Related Art Conventionally, in electronic equipment such as a computer device, various operation information of the computer immediately before the power is turned off is stored in a memory or the like, and the original state can be restored when the power is turned on again. Some had a resume function.

However, in the above-mentioned conventional example, if an attempt is made to return from the resume by pressing the switch again before the resume is not completely completed, the saving process of various states is interrupted on the way, which is unsatisfactory. Even if you try to recover from a completely resumed state, you may not be able to recover.

[0004]

As described above, the SW operation before the resume is not completely completed interrupts the saving process of various states, which makes it impossible to recover from the incomplete resume state.

[0005]

According to the present invention, the transition to the resume state is detected for each stage, and a record is made on the memory at the completion of each stage. When each step is completed, the information stored at that step may be destroyed, and the power supply to the device is stopped. Then, when the restoring operation is performed, the information is written back only to the device that needs the restoring operation according to the recorded contents. As a result, even if the resume is incomplete, the original operating state can be restored again.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a drawing which best represents the features of the present invention. In FIG. 1, 1 is a CPU which is a central control unit which is the center of control, and 2 is a readable / writable memory for storing various data. A certain RAM, ROM 3 which is a read-only memory in which a program necessary for the CPU 1 to operate is stored, 4 is an SW control device which issues an interrupt request in response to a change in the state of SW 5, 5 is SW (switch), 6 is an interrupt controller that issues an interrupt to the CPU 1 in response to an interrupt request from the device, 7 is a display control circuit that generates a control signal for the display, and 8 is an O of the power supply device 9.
A power supply control device for controlling N / OFF operation, and 9 is a power supply device.

FIG. 2 is a flow chart of a program stored in the ROM 3 at the time of saving the state for realizing the resume function. FIG. 3 is a flow chart of the program for realizing the process at the time of returning to the state. It is a chart.

In the computer device configured as shown in FIG. 1, when the user presses SW5 which is a switch for interrupting the use, the SW control device 4 sends an interrupt request to the interrupt controller 6. Then, the interrupt controller 6 issues a hardware interrupt to the CPU 1. Upon receiving this interrupt, the CPU 1 interrupts the current processing and executes the resume processing program stored in the ROM 3.

This program is executed in step S1 shown in FIG.
First, the register information of the CPU 1 is saved. Then, in step S2, the fact that the saving of the CPU1 is completed is recorded in the RAM2. Similarly, the register information of the interrupt controller 6 is saved in step S3, and its completion is recorded in the RAM 2 in step S4. Then, in step S5, the power supply to the interrupt controller is stopped. Then, in step S6, the register information of the display controller 7 is recorded, in step S7 the completion is recorded on the RAM 2, and in step S8 the power supply is stopped. When the resume of the other device is completed, the power supply to the CPU 1 itself is stopped in step S9 to enter the complete resume state.

When returning from the resume mode, the SW shown in FIG.
When 5 is pressed and a return is instructed, step S1 in FIG.
At 0, power supply to all devices is restarted and initialization processing is performed. Next, at step S11, the device completion information recorded in the RAM 2 is referred to, and which device needs to perform the restoration process is determined. For example, if the resume is completely completed, the process proceeds to step S12. Then, in steps S12 to S15, the recovery process is performed for each device, the record of the resume on the RAM 2 is erased, and the process is passed to the pointer position at the time when the resume is instructed.

[0011]

As described above, by performing the resume in stages and controlling the power supply for each device, it is possible to reproduce the state again even when the resume is incomplete. Become.

[Brief description of drawings]

FIG. 1 is a system block diagram of a computer implementing the present invention.

FIG. 2 is a flowchart of a processing program at the time of state saving that realizes a resume function stored in a ROM.

FIG. 3 is a flowchart of a processing program stored in a ROM at the time of returning from a state for realizing a resume function.

[Explanation of symbols]

 1 CPU 2 RAM 3 ROM 4 SW control circuit 5 SW (switch) 6 Interrupt controller 7 Display control device 8 Power supply control device 9 Power supply device

Claims (1)

Claim: What is claimed is: 1. An electronic device comprising a computer device having a device and a memory built-in, wherein when the use of the computer device is interrupted, a means for controlling power supply to each device, Means to cut off the power supply of each step by step, a means to save the current computer operation status such as the device state and memory contents when the power supply is stopped, and the original power supply when the power supply is started again. An electronic device comprising means for restoring an operating state.