Patent US5581794A successfully refreshed from Google Patents.
US5581794A
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Apparatus for generating a channel time-out signal after 16.38 milliseconds
Assignee: Fujitsu IT Holdings Inc
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Filing: 1995-05-01
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Granted: 1996-12-03
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Expires: 2015-05-01
Abstract
Abstract An apparatus and method for processing channel time-out for input/output channels in a data processing system. A counting device is provided which cycles through a count indicative, in a first part, of each of a plurality of channels in the data processing system and, in a second part, a sequence of time indications. A time indication is saved for a particular channel upon the execution of an instruction for that channel and subsequent comparisons are made of the stored time indication and the present time indication to determine if a difference in these two time indications is sufficient to constitute a time-out.
Inventors
- 👤 David H. Lin
- 👤 James E. Brogan
- 👤 Matthew G. Noel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:17
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0751; G06F11/0754; G06F11/0757; G06F2201/00; G06F2201/835
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
An apparatus for generating a time-out signal for a channel of a plurality of input/output channels, comprising: means for registering a time t1 which is a time at which an operation for the channel is initiated plus a predetermined length of time wherein said predetermined length of time is 16.38 milliseconds; means for comparing said time t1 with a time t2 later than said time t1, at which time t2 said operation for the channel is not completed; and means for generating the time-out signal to initiate a time-out if said time t2 is at least as large as said time t1.
Claim 2
Independent Claim
102 words
An apparatus for generating a time-out signal for a channel of a plurality of input/output channels, comprising: means for registering a time t1 which is a time at which an operation for the channel is initiated plus a predetermined length of time wherein said predetermined length of time is 16.38 milliseconds; means for comparing said time t1 with a time t2 later than said time t1, at which time t2 said operation for the channel is not completed; and means for generating the time-out signal to initiate a time-out if said time t2 is at least as large as said time t1.
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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) | 1999-12-03 | 2000-06-03 | 2000-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-03 | 2004-06-03 | 2004-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-03 | 2008-06-03 | 2008-12-03 | $7700.00 | Window Closed / Lapsed |