US4176341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information transfer apparatus
Assignee: Hitachi Ltd
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Filing: 1977-04-27
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Granted: 1979-11-27
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Expires: 1997-04-27
Abstract
Abstract An information transfer apparatus for connecting between plural channels and input/output control devices in a computer system, comprising a bundle of signal lines with which said channels are connected, said bundle of signal lines including plural signal lines provided respectively for said plural channels so as to effect the time-shared connection between said plural channels and input/output control devices therethrough.
Inventors
- 👤 Michio Miyazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:25
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/14; G06F13/36; G06F13/368; G06F13/378; G06F13/10; G06F13/12; G06F13/122
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
An information transfer apparatus for connecting between plural channels and at least one input/output control device, comprising a plurality of channel out signal lines each connected to a particular channel to be driven by that particular channel to apply a connection request signal identifying the particular channel to the at least one input/output control device and each of said channel out signal lines also being coupled in common with the remaining channels other than said particular channel to indicate to the remaining channels when the particular channel has applied a connection request signal to the at least one input/output control device.
Claim 2
Dependent Claim
101 words
An information transfer apparatus for connecting between plural channels and at least one input/output control device, comprising a plurality of channel out signal lines each connected to a particular channel to be driven by that particular channel to apply a connection request signal identifying the particular channel to the at least one input/output control device and each of said channel out signal lines also being coupled in common with the remaining channels other than said particular channel to indicate to the remaining channels when the particular channel has applied a connection request signal to the at least one input/output control device.
Claim 3
Dependent Claim
47 words
An information transfer apparatus as claimed in claim 1, further comprising a plurality of request signal lines each connected from a particular channel to each of the input/output control devices to apply a connection request signal from any of the input/output control devices to said particular channel.
Claim 4
Dependent Claim
38 words
An information transfer apparatus as claimed in claim 2 wherein each channel includes individual receiver means coupled to each of the individual channel output lines of the other channels to receive connection request signals from said other channels.
Claim 5
Dependent Claim
73 words
An information transfer apparatus as claimed in claim 3, wherein each channel further includes driver means coupled to that channel's own channel out signal line to provide a connection request signal to the channel out signal line, wherein said driver unit is controlled by said receiver means to stop delivery of a connection request if a connection request signal is received by the receiver means from a channel having a higher channel priority.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |