Patent US2761655A successfully refreshed from Google Patents.
US4066883A
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Test vehicle for selectively inserting diagnostic signals into a bus-connected data-processing system
Assignee: International Business Machines Corp
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Filing: 1976-11-24
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Granted: 1978-01-03
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Expires: 1996-11-24
Abstract
Abstract A test vehicle capable of being interleaved in a bus-connected data-processing system includes two unidirectional transmission units having outputs connected to opposite ones of bus connecting terminals and inputs connected to such terminals. A direction controller in the vehicle controls the transmission of signals through the unidirectional transmission units. Each of the transmission units has means for receiving diagnostic signals from an external source which also controls the directional controller which in turn controls the transmission units. The direction controller further receives signals from the transmission units for controlling transmission of signals therethrough.
Inventors
- 👤 Delwyn Roche Wheeler, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:20
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/22; G06F11/2205; G06F11/221
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
165 words
A test vehicle for a bus-connected data-processing system for selectively interjecting diagnostic signals on the bus via a pair of terminals adapted to be attached to a bus such that bus signals flow through the test vehicle via said terminals and to the exclusion of data processing signals normally on said bus characterized in that a pair of AND circuits are connected respectively to said terminals for receiving data processing signals therefrom, a pair of combining circuits respectively connected to receive signals from said AND circuits and having outputs connected to said terminals respectively not connected to said respective AND circuits, a pair of diagnostic input connections for receiving diagnostic input signals respectively connected to said combining circuits, and a direction controller receiving signals from said AND circuits and having a diagnostic control connection for receiving control signals and having electrical connections to said AND circuits for enabling one and only one of said AND circuits in accordance with signals received by said direction controller.
Claim 2
Dependent Claim
165 words
A test vehicle for a bus-connected data-processing system for selectively interjecting diagnostic signals on the bus via a pair of terminals adapted to be attached to a bus such that bus signals flow through the test vehicle via said terminals and to the exclusion of data processing signals normally on said bus characterized in that a pair of AND circuits are connected respectively to said terminals for receiving data processing signals therefrom, a pair of combining circuits respectively connected to receive signals from said AND circuits and having outputs connected to said terminals respectively not connected to said respective AND circuits, a pair of diagnostic input connections for receiving diagnostic input signals respectively connected to said combining circuits, and a direction controller receiving signals from said AND circuits and having a diagnostic control connection for receiving control signals and having electrical connections to said AND circuits for enabling one and only one of said AND circuits in accordance with signals received by said direction controller.
Claim 3
Dependent Claim
65 words
The test vehicle set forth in claim 1 further including delay circuit means electrically interposed respectively between said AND circuits and said combining circuits whereby signal outputs of said combining circuits are delayed with respect to the outputs of said AND circuit such that said direction controller can respond to said AND circuit signal prior to either of said combiner circuits supplying an output signal.
Claim 4
Dependent Claim
85 words
The test vehicle set forth in claim 1 wherein said direction controller includes an L latch and an R latch, said R latch being responsive to a signal from a first of said AND circuits to assume an active condition for inhibiting second of said AND circuits, said L latch being responsive to said second AND circuit to assume a set state for inhibiting operation of said first AND circuit, and electrical control connection means for receiving diagnostic signals for resetting both of said latches.
Claim 5
Dependent Claim
70 words
The test vehicle set forth in claim 1 further including a first diagnostic connection for receiving and AND-circuit-enabling signal and supplying same to a first of said AND circuits, and a second diagnostic enabling connection for receiving a second AND-circuit-enabling signal and being connected to a second one of said AND circuits whereby direction of signal transfer through said vehicle is controllable by signals received over said diagnostic enabling connections.
Claim 6
Dependent Claim
81 words
The test vehicle set forth in claim 1 wherein said direction controller includes memory means responsive to signals from said AND circuits and said memory means including control signal output means for selectively inhibiting operation of one of said AND circuits in response to a signal from another one of said AND circuits whereby signal transmissions through said test vehicle occur only in a single direction, and means for resetting said direction controller for enabling a selection of said single direction.
Claim 7
Dependent Claim
100 words
A test vehicle for a bus-connected data-processing system for selectively interjecting diagnostic signals on a bus via a pair of terminals to the exclusion of data processing signals characterized in that said test vehicle has a right transmission unit and a left transmission unit respectively interconnecting said terminals for transmission of signals in mutually exclusive opposite directions, and a direction controller connected to said transmission units for actuating and deactuating same and responsive to signals received from said transmission units for actuating and deactuating said transmission units for limiting signal transmission on said bus to one of said opposite directions.
Claim 8
Dependent Claim
100 words
A test vehicle for a bus-connected data-processing system for selectively interjecting diagnostic signals on a bus via a pair of terminals to the exclusion of data processing signals characterized in that said test vehicle has a right transmission unit and a left transmission unit respectively interconnecting said terminals for transmission of signals in mutually exclusive opposite directions, and a direction controller connected to said transmission units for actuating and deactuating same and responsive to signals received from said transmission units for actuating and deactuating said transmission units for limiting signal transmission on said bus to one of said opposite directions.
Claim 9
Dependent Claim
45 words
The test vehicle set forth in claim 6 further including combining circuit means in each set of transmission units and having a diagnostic input connection whereby diagnostic signals can be mixed with signals received from said terminals for mutually exclusive opposite directions of signal transfer.
Claim 10
Dependent Claim
111 words
A data processing test system including a bus-connected data-processing system, said bus having interjecting points located between two physically adjacent electrically connected units, said electrical connection being via said bus, a diagnostic unit for supplying control signals and diagnostic signals, a test vehicle interjection unit electrically interposed between said interjecting points on said bus and connected to said diagnostic unit for receiving said control signals and said diagnostic signals for selectively transferring said diagnostic signals to said bus, and transmission limiting means in said test vehicle for limiting transmissions in one of two directions on said bus whereby signals including said diagnostic signals are limited on the bus for facilitating analysis.
Claim 11
Dependent Claim
111 words
A data processing test system including a bus-connected data-processing system, said bus having interjecting points located between two physically adjacent electrically connected units, said electrical connection being via said bus, a diagnostic unit for supplying control signals and diagnostic signals, a test vehicle interjection unit electrically interposed between said interjecting points on said bus and connected to said diagnostic unit for receiving said control signals and said diagnostic signals for selectively transferring said diagnostic signals to said bus, and transmission limiting means in said test vehicle for limiting transmissions in one of two directions on said bus whereby signals including said diagnostic signals are limited on the bus for facilitating analysis.
Claim 12
Dependent Claim
45 words
The test system set forth in claim 8 wherein said test vehicle includes a direction controller having memory means memorizing a first received signal from either one of said terminals and having control means inhibiting transmissions in the direction opposite to said first received signal.
Claim 13
Dependent Claim
30 words
The test system set forth in claim 9 further including diagnostic signal mixing means in said test vehicle and being connected to said diagnostic unit for receiving diagnostic signals therefrom.
Claim 14
Dependent Claim
110 words
The test system set forth in claim 9 wherein said test vehicle has a right transmission unit and a left transmission unit coupled between said terminals respectively for transmitting signals in opposing directions, each said transmission unit being connected to said direction controller for supplying signals thereto for limiting transmissions in one of said opposing directions, and each of said transmission units including a signal combiner circuit for receiving diagnostic signals and combining same for signals received from said terminals respectively and for supplying signals to opposite ones of said terminals respectively and including connections to said direction controller for inhibiting transmission of signals in one of said two directions.
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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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |