EP0365128A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Computer system and method of preserving the state of the system
Assignee: Seiko Epson Corp
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Filing: 1989-09-04
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Granted: —
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Expires: 2009-09-04
Abstract
Abstract The invention provides a computer system in which the state of the system at a particular point can be preserved for subsequent processing. The system comprises detecting means (11) for detecting an event indicating that a process for saving the state of the system is to be started, and system state saving means (12) responsive to an instruction from the detecting means for generating for supply to an external store a data output representing the contents of a main memory, I/O status and CPU status. System state restoring means (14, 15) are operable to read out from the external store data previously stored therein for restoring the contents of the main memory, the I/O status and the CPU status to a previous condition. Post restoration processing means (16) are also provided for controlling processing after the previous condition is restored to provide continuity with processing leading to the previous condition.
Inventors
- 👤 Masaaki Hanaoka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 01:24
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/26; G06F1/30; G06F11/00; G06F11/07; G06F11/14; G06F11/1402; G06F11/1415; G06F11/1441; G06F9/00; G06F9/06; G06F9/44; G06F9/4401; G06F9/4418; Y; Y02; Y02D; Y02D10/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
A computer system having means for preserving the state of the system for future processing, characterised in that the preserving means comprise detecting means (11) for detecting an event indicating a process for saving the system state is to be started, system state saving means (12) responsive to an instruction from the detecting means for generating for supply to an external store a data output representing the contents of a main memory, I/O status and CPU status, and system state restoring means (14, 15) operable to read out from the external store data previously stored therein for restoring the contents of the main memory, I/O status and CPU status to a previous condition.
Claim 2
Dependent Claim
113 words
A computer system having means for preserving the state of the system for future processing, characterised in that the preserving means comprise detecting means (11) for detecting an event indicating a process for saving the system state is to be started, system state saving means (12) responsive to an instruction from the detecting means for generating for supply to an external store a data output representing the contents of a main memory, I/O status and CPU status, and system state restoring means (14, 15) operable to read out from the external store data previously stored therein for restoring the contents of the main memory, I/O status and CPU status to a previous condition.
Claim 3
Dependent Claim
37 words
A system according to claim 1 characterised in that the event indicating a saving process is to be started comprises one of a demand for turn off of a power supply and an instruction from a user.
Claim 4
Dependent Claim
33 words
A system according to claim 1 characterised in that the system state restoring means are operable in response to one of turning on of a power supply and an instruction from a user.
Claim 5
Dependent Claim
61 words
A system according to claim 1, 2 or 3 characterised in that the system state restoring means are operable to select among data representing successive earlier conditions for the contents of the main memory, the I/O status and the CPU status for restoring the contents of the main memory, the I/O status and the CPU status to a selected earlier condition.
Claim 6
Independent Claim
32 words
A system according to any of claims 1 to 4 characterised by means for controlling processing after the previous condition is restored to provide continuity with processing leading to the previous condition.
Claim 7
Independent Claim
94 words
A method of preserving the state of a computer system for subsequent processing characterised by detecting an event indicating a process for saving the state of the computer system is to be started, generating in response to the detection a data output for supply to an external store, which data output represents the contents of a main memory, I/O status and CPU status, and subsequently reading out from the external store data previously stored therein for restoring the contents of the main memory, the I/O status and the CPU status to a previous conditions
Claim 8
Independent Claim
94 words
A method of preserving the state of a computer system for subsequent processing characterised by detecting an event indicating a process for saving the state of the computer system is to be started, generating in response to the detection a data output for supply to an external store, which data output represents the contents of a main memory, I/O status and CPU status, and subsequently reading out from the external store data previously stored therein for restoring the contents of the main memory, the I/O status and the CPU status to a previous conditions
Claim 9
Dependent Claim
235 words
A personal computer system in which a power supply can be turned off by software, characterised by save process start detecting means (11) for detecting a demand for turn off of the power supply or an instruction from a user, system state saving means (12) responsive to an instruction from the save process start detecting means for outputting data in a main memory, the system condition of I/O status and CPU status to an external store, post save processing means (13) for turning off the power supply after the system condition has been fully output to the external store by the system state saving means or for continuing processing in response to the next instruction from the user, system state restoring means (14, 15) for reading out the system condition output at the or a still earlier time to the external store, the system state restoring means being activated after turn on of the power supply or when the user instructs and being arranged to set data into system sources including the main memory, the I/O and the CPU for restoring the system condition, and post restoration processing means (16) for controlling a program after the system condition is restored to continue at the point just after the command suspended by the save processing start means at the or the still earlier time or for carrying out processing according to an instruction from the user.
Claim 10
Dependent Claim
235 words
A personal computer system in which a power supply can be turned off by software, characterised by save process start detecting means (11) for detecting a demand for turn off of the power supply or an instruction from a user, system state saving means (12) responsive to an instruction from the save process start detecting means for outputting data in a main memory, the system condition of I/O status and CPU status to an external store, post save processing means (13) for turning off the power supply after the system condition has been fully output to the external store by the system state saving means or for continuing processing in response to the next instruction from the user, system state restoring means (14, 15) for reading out the system condition output at the or a still earlier time to the external store, the system state restoring means being activated after turn on of the power supply or when the user instructs and being arranged to set data into system sources including the main memory, the I/O and the CPU for restoring the system condition, and post restoration processing means (16) for controlling a program after the system condition is restored to continue at the point just after the command suspended by the save processing start means at the or the still earlier time or for carrying out processing according to an instruction from the user.
References Cited (Backward Citations)
No citation records indexed.
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