Patent EP0359233A2 successfully refreshed from Google Patents.
EP0359233A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Computer system and method for changing operation speed of system bus
Assignee: Toshiba Corp
•
Filing: 1989-09-13
•
Granted: —
•
Expires: 2009-09-13
Abstract
Abstract A computer system includes a program executing section (11, 17) for executing a program, a instruction generating section (102) for generating a frequency change instruction in response to the execution of the program, and a changing section (104) for changing the frequency of the operation clock of a system bus in response to the frequency change instruction.
Inventors
- 👤 Nobutaka C/O Int. Prop. Div. Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 16:03
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/22; G06F9/28; G06F13/00; G06F13/38; G06F13/42; G06F13/4204; G06F13/4208; G06F13/4217; G06F1/00; G06F1/04; G06F1/08; G06F9/30; G06F9/38; G06F9/3867; G06F9/3869
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
67 words
A computer system in which the operation clock frequency of a system bus can be changed characterized by comprising: program executing means (11, 17) for executing a program; instruction generating means (102) for generating a frequency change instruction in response to the execution of the program; and changing means (104) for changing the operation clock frequency of the system bus in response to the frequency change instruction.
Claim 2
Dependent Claim
67 words
A computer system in which the operation clock frequency of a system bus can be changed characterized by comprising: program executing means (11, 17) for executing a program; instruction generating means (102) for generating a frequency change instruction in response to the execution of the program; and changing means (104) for changing the operation clock frequency of the system bus in response to the frequency change instruction.
Claim 3
Dependent Claim
24 words
A system according to claim 1, characterized in that said program is for setting the system environment and is part of the operating system.
Claim 4
Dependent Claim
82 words
A system according to claim 1, characterized in that said program executing means (11, 17) includes memory means (17) for storing the program; and said instruction generating means (102) includes: register means (238) for holding change control data; refresh instruction generating means (239) for generating a refresh instruction for specifying a refresh process of said memory means (17); and frequency change instruction generating means (112) for generating the frequency change instruction in response to the change control data and the refresh instruction.
Claim 5
Dependent Claim
54 words
A system according to claim 3, characterized in that said program executing means includes: memory means (17, 20) for storing a program; and a CPU (11) for executing the program; said CPU (11) including means for setting the change control data into said register means (238) in response to the execution of the program.
Claim 6
Dependent Claim
24 words
A system according to claim 1, characterized in that said program is an application program and includes an input/output command to an input/output device.
Claim 7
Dependent Claim
73 words
A system according to claim 5, characterized in that said instruction generating means (106) includes: means (250, 252) for generating a setting instruction in response to the input/output instruction; and frequency changing instruction generating means (254) for generating the frequency change instruction in response to the setting instruction and input reset instruction; said input/output device generates the reset instruction at the time of completion of the input/output process corresponding to the input/output command.
Claim 8
Dependent Claim
48 words
A system according to claim 6, characterized in that said program executing means includes: memory means (17, 20) for storing the program; and a CPU (11) for executing the program; said CPU (11) including means for generating an input/output instruction in response to the execution of the program.
Claim 9
Dependent Claim
30 words
A system according to claim 7, characterized in that said input/output device is determined by a routine for setting the system environment, the routine being part of an operating system.
Claim 10
Dependent Claim
48 words
A system according to claim 7, characterized by further comprising wait signal generating means (256) for generating and outputting a wait signal to said CPU (11) in response to the frequency change instruction, said processor (11) interrupting the execution of the program in response to the wait signal.
Claim 11
Dependent Claim
38 words
A system according to claim 1, characterized in that said changing means (104) further comprises means (234, 235, 236, 237, 230, 231) for inhibiting the output of at least one clock before the operation clock frequency is changed.
Claim 12
Independent Claim
54 words
A method for changing the operation clock frequency of a system bus characterized by comprising the steps of: executing a program; generating a frequency change instruction in response to the execution of the program by a processor; and changing the operation clock frequency of the system bus in response to the frequency change instruction.
Claim 13
Independent Claim
54 words
A method for changing the operation clock frequency of a system bus characterized by comprising the steps of: executing a program; generating a frequency change instruction in response to the execution of the program by a processor; and changing the operation clock frequency of the system bus in response to the frequency change instruction.
Claim 14
Dependent Claim
24 words
A method according to claim 11, characterized in that said program is for setting the system environment and is part of the operating system.
Claim 15
Dependent Claim
49 words
A method according to claim 12, characterized in that said step of generating the frequency change instruction includes the steps of: generating a refresh instruction for specifying the refresh process for memory means; and generating a frequency change instruction in response to the change control data and refresh instruction.
Claim 16
Dependent Claim
39 words
A method according to claim 13, characterized in that said step of executing the program includes the steps of: and executing the program stored in memory means; and generating change control data according to the execution of the program.
Claim 17
Dependent Claim
26 words
A method according to claim 11, characterized in that said program is an application program and includes an input/output instruction with respect to an input/output device.
Claim 18
Dependent Claim
59 words
A method according to claim 15, characterized in that said step of generating the frequency change instruction includes the steps of: generating a setting instruction in response to the input/output instruction; generating a reset instruction at the time of completion of the input/output process; and generating the frequency change instruction in response to the setting instruction and reset instruction.
Claim 19
Dependent Claim
34 words
A method according to claim 16, characterized in that said step of executing the program includes the steps of: executing the program; and generating an input/output instruction according to the execution of the program.
Claim 20
Dependent Claim
30 words
A method according to claim 17, characterized in that said input/output device is determined by a routine for setting the system environment, the routine being part of the operating system.
Claim 21
Dependent Claim
53 words
A method according to claim 17, characterized in that said step of generating the frequency change instruction includes a step of generating a wait signal in response to the frequency change instruction, and said program execution step includes a step of interrupting the execution of the program in response to the wait signal.
Claim 22
Dependent Claim
26 words
A method according to claim 11, characterized by further comprising a step of inhibiting the output of clock immediately before the operation clock frequency is changed.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.