US5581794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for generating a channel time-out signal after 16.38 milliseconds
Assignee: Fujitsu IT Holdings Inc
•
Filing: 1995-05-01
•
Granted: 1996-12-03
•
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 13:26
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.
References Cited (Backward Citations)
US3723975A
Cited
US3876987A
Cited
US3972023A
Cited
US4327409A
Cited
US4566111A
Cited
US4554461A
Cited
US4618953A
Cited
US4642758A
Cited
US4637015A
Cited
US4766596A
Cited
US4839887A
Cited
US5097470A
Cited
US5134502A
Cited
US5388254A
Cited
US5339405A
Cited
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 |