Patent US5359608A successfully refreshed from Google Patents.
US5359608A
Expired / Lapsed
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Apparatus for activation and deactivation of instruction tracing through use of conditional trace field in branch instructions
Assignee: Fujitsu IT Holdings Inc
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Filing: 1992-11-24
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Granted: 1994-10-25
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Expires: 2012-11-24
Abstract
Abstract A conditional trace system in a computer system for controlling the enablement of a trace operation in the computer system, the computer system including a set of instructions for operating said computer, the set of instructions including branch instructions, the branch instruction generating a jump signal whenever the branch instruction performs a branch operation, the conditional trace system comprising a conditional trace field in each branch instruction where the conditional trace field has either a first or second value and a first means responsive to the value of said conditional trace field and the jump signal for selectively enabling and disenabling the trace operation within the computer system.
Inventors
- 👤 John Belz
- 👤 Linda Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:12
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/36; G06F11/362; G06F11/3636; G06F11/30; G06F11/34; G06F11/3466; G06F11/348; G06F11/3476
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
189 words
A conditional trace apparatus in a computer system for controlling the activation of a trace operation in said computer system, said computer system including a set of instructions for operating said computer, said set of instructions including branch instructions, said branch instructions generating a jump signal whenever said branch instructions perform a branch operation, said conditional trace apparatus comprising: a conditional trace field in each said branch instruction, said conditional trace field having either a first or second value; and first means responsive to said value of said conditional trace field and said jump signal for selectively activating and deactivating said trace operation of said computer system, said first means comprising: second means for generating a set signal whenever there is coincidence between said first value of said conditional trace field and said jump signal; third means for generating a first reset signal whenever there is coincidence between said first value of said conditional trace field and the absence of said jump signal; and fourth means for generating a second reset signal whenever there is coincidence between said second value of said conditional trace field and said jump instruction.
Claim 2
Dependent Claim
189 words
A conditional trace apparatus in a computer system for controlling the activation of a trace operation in said computer system, said computer system including a set of instructions for operating said computer, said set of instructions including branch instructions, said branch instructions generating a jump signal whenever said branch instructions perform a branch operation, said conditional trace apparatus comprising: a conditional trace field in each said branch instruction, said conditional trace field having either a first or second value; and first means responsive to said value of said conditional trace field and said jump signal for selectively activating and deactivating said trace operation of said computer system, said first means comprising: second means for generating a set signal whenever there is coincidence between said first value of said conditional trace field and said jump signal; third means for generating a first reset signal whenever there is coincidence between said first value of said conditional trace field and the absence of said jump signal; and fourth means for generating a second reset signal whenever there is coincidence between said second value of said conditional trace field and said jump instruction.
Claim 3
Dependent Claim
61 words
The conditional trace apparatus of claim 1 wherein said first means further comprises: fifth means for generating a trace deactivation signal in response to said set signal generated by said second means and for generating a trace activation signal in response to said first reset signal generated by said third means or said second reset signal generated by said fourth means.
Claim 4
Dependent Claim
45 words
The conditional trace apparatus of claim 2 wherein said first means further comprises: sixth means connected to said fifth means for maintaining said fifth means to generate said trace activation signal until reset by said first or second reset signal for generating said activation signal.
Claim 5
Dependent Claim
48 words
The conditional trace apparatus of claim 3 wherein said first means further comprises: seventh means connected to said fifth means for activating and deactivating said trace function of said computer system in response to said trace activation signal and said trace deactivation signal generated by said fifth means.
Claim 6
Dependent Claim
48 words
The conditional trace apparatus of claim 2 wherein said first means further comprises: seventh means connected to said fifth means for activating and deactivating said trace function of said computer system in response to said trace activation signal and said trace deactivation signal generated by said fifth means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-24 | 1998-04-25 | 1998-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-24 | 2002-04-25 | 2002-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-24 | 2006-04-25 | 2006-10-25 | $7700.00 | Window Closed / Lapsed |