JPH04223510A - Information processor - Google Patents

Abstract

PURPOSE:To reduce power consumption for resume processing by compressing all of data when shutting off the main power supply, and by supplying only a storage area that stored the compressed data with power from an auxiliary power supply. CONSTITUTION:Storage means 3-5 for storing data are divided for each area, and turning on and off power supply 8 is made possible for each storage means. Further, a means 2 for data compression and expansion is installed to continue supplying only the storage means that stored compressed data with power from the auxiliary power supply 8 when turning off the main power supply. Furthermore, when turning on the main power supply again, data is expanded to make the execution of resume processing possible.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an information processing device,
More specifically, the present invention relates to an information processing device having a resume processing function for a main storage device or the like.

0002

[Prior Art] Conventionally, information processing devices such as personal computers equipped with a resume processing function have a resume processing program, and when the main power is cut off by a power switch, the above program is automatically started. As a result, the power supply to peripheral devices such as a CRT and the CPU itself is stopped, but the power supply is continued in order to cause the registers and main memory of the CPU to retain their contents. Furthermore, when the power switch is turned "on", the resume processing can be performed again to return to the execution state when the power switch was "off", and it is possible to start from there.

0003

[Problem to be Solved by the Invention] However, in general, electronic devices such as book-sized personal computers that have a resume processing function use batteries as a power source for memory retention, and it is difficult to extend their lifespan. The problem is how to save labor in order to achieve this, and it is not desirable to supply power to all storage devices.

An object of the present invention is to focus on the above-mentioned conventional problems, and to solve the problems, it is an object of the present invention to provide an information processing apparatus that requires a small power supply and can fully utilize the resume function.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention has a resume processing function related to turning off and turning on the main power, and for the resume processing, the storage means is supplied with backup power. In the information processing device, the storage means is divided into areas, a power supply control means is capable of turning off and on the backup and main power sources for each area of the divided storage means, and storage means is provided in the storage means. a data compression/expansion means capable of compressing and decompressing all the data; and a storage means storing the compressed data after compressing all the data by the data compression/expansion means when the main power supply is cut off. When the main power is turned on, the main power is supplied only to the area of the storage means other than the area in which the compressed data is stored, and the compressed data is It is characterized by comprising means for controlling the data to be expanded by the data compression/expansion means and returned to each area of the storage means.

[0006]

[Operation] According to the present invention, when performing resume processing when the main power is cut off, data in the entire area is first compressed and stored in the storage means, and backup power is supplied only to the area where the data is stored. As a result, it is possible to save power, and when the main power is turned on again, all compressed data can be expanded to their original state to support the resume function.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described in detail and specifically below with reference to the drawings.

FIG. 1 shows an example of the configuration of the present invention. Here, 1 is the CPU, 2 is the read-only memory (ROM)
), 3, 4, and 5 are random access memories divided into three areas RAMA, RAMB, and VRAM, and these memories 3, 4, and 5 are configured as a memory map shown in FIG. 2 together with ROM2. . Note that the VRAM 5 is a display video memory for the CRT 6. Reference numeral 7 denotes a power supply control device according to the present invention, which controls the operation of switching the power supply to the battery 8 and supplying it to each part at the time of resume processing or other needs. 9 is a data bus,
10 is a power supply line.

Furthermore, the ROM 2 has a power supply control program and a resume processing program which instruct the power supply control device 7, as well as a well-known data compression program capable of compressing and decompressing data stored in the memories 3, 4 and 5.・It stores the decompression program, and the CPU uses it during resume processing.
1, various operations are performed according to the procedure described later. In this embodiment, it is assumed that the main memory is 64K bits.

Next, referring to FIG. 3, a control operation procedure related to resume processing according to this embodiment will be explained. FIG. 3(a) shows the operation when the power switch is turned "off". In this case, when the main power is cut off, first in step S1 RAMB4, VRAM5 and RAM3
The data stored in RAMB is sequentially compressed and sequentially written from the upper part of RAMB according to the absolute addresses of the memory map shown in FIG. Then, in step S2, the amount of compressed and written data is measured, and in step S3
It is determined whether the data can fit into 4 RAMBs. However, if the judgment is affirmative, that is, if it is judged that writing is possible only in RAMB4, the process moves to step S4, where the power to VRAM5 and RAMA3 is cut off, and then the process moves to step S5, where the conventional resume process is performed. do. If the determination in step S3 is negative, the process directly advances to step S5 and resume processing is performed. however,
Although not shown in the figure, if the determination in step S3 is negative, a step is provided to determine whether the data fits within the area up to the next VRAM5.
Alternatively, only the power source No. 3 may be turned off and the process proceeds to Step S5.

Next, when the power switch is turned on, step S is performed according to the procedure shown in FIG. 3(b).
Memory whose power is cut off at 11, i.e. (a)
If the power supply to the VRAM 5 and RAMA 3 has been cut off in step S4 of the procedure, the power to these is turned on. Then, in the next step S12, RA
While decompressing the compressed data stored in MB4,
The decompressed data is stored in RAMB, VRAM, and RAM in that order.
The data is stored in the MA, and conventional resume processing is performed in step S13. Note that step S of the procedure shown in (a)
3, the compressed data does not fit into RAMB4, so V
It goes without saying that even if the power to RAM5 and RAM3 is left on, it is possible to turn them on again as step S11 of the procedure (b). Power is never turned on.

Furthermore, in the embodiment described above, the ROM2
A logical program including data compression and expansion was stored in the computer, and the operation was performed according to that program. It can also be configured to drive a circuit.

[0013]

As described above, the present invention has a resume processing function related to shutting off and turning on the main power, and supplies backup power to the storage means for the resume processing. In the information processing apparatus, a storage means divided into areas, a power supply control means capable of turning off and on the backup and main power sources for each area of the divided storage means, and all of the storage means stored in the storage means are provided. data compression/expansion means capable of compressing and decompressing data; and when the main power supply is cut off, all the data is compressed by the data compression/expansion means, and the compressed data is stored in the area of the storage means. only supplying said backup power;
When the main power is turned on, the main power is supplied to an area of the storage means other than the area in which the compressed data is stored, and the compressed data is expanded by the data compression/expansion means and the storage means is expanded. By providing control means for returning to each area, it is possible to provide an information processing device that can effectively utilize the resume function with low power consumption.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of the present invention.

FIG. 2 is a configuration diagram of a memory map according to the present invention.

FIG. 3 is a flowchart showing the procedure of a resume processing operation according to the present invention.

[Explanation of symbols]

1 CPU 2 ROM 3 RAMA 4 RAMB 5 VRAM 6 CRT 7 Power control device 8 Batteries 9 Data bus 10 Power supply line

Claims (1)

[Claims] Claim 1. An information processing device having a resume processing function related to shutting off and turning on the main power, and supplying backup power to storage means for the resume processing, wherein the storage is divided into areas. a power control means capable of turning off and on the backup and main power sources for each area of the divided storage means; and a data compression/expansion means capable of compressing and expanding all data stored in the storage means. When the main power supply is cut off, all the data is compressed by the data compression/expansion means, and the backup power supply is supplied only to the area of the storage means in which the compressed data is stored. When the power is turned on, the main power is supplied to areas of the storage means other than those storing the compressed data, and the compressed data is expanded by the data compression/expansion means to each area of the storage means. An information processing device characterized by comprising: means for controlling to return to the original state.