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公开(公告)号：DE68928381T2
公开(公告)日：1998-03-26
申请号：DE68928381
申请日：1989-07-14
Applicant: IBM
Abstract: The present invention relates to apparatus for transmitting data between a central processor (12) and one or more remote peripheral devices (30, 32, 34) comprising one or more channels (14) connected between the processor and one or more peripheral device controllers (24, 26, 28) for controlling one or more peripheral devices (30, 32, 34) in response to signals from the channel in accordance with a predetermined communications protocol, and a serial data link adapter (17) connected between one of the channels and one or more of the peripheral device controllers for extending the range of communications between the channels and the controllers. According to the invention, the apparatus is characterised in that the serial data link adapter (17) comprises first and second sub-adapters (16, 20) each communicating with the other across the serial data link and each sub-adapter having transmit and receive sections, in that the transmit section of each of the sub-adapters comprises frame generation means (40A, 40B) responsive to signals received from the channel (14) and the peripheral device controllers respectively, the signals conforming to the predetermined protocol, the frame generation means including means for generating one or more unique start frame characters in response to control signals received by the frame generation means, means for generating predetermined idle characters, the idle characters having an error imune relationship with the start frame characters, such that idle characters having single and double bit errors transmitted on the serial data link will not be recognized as start frame characters, an encoder (50A, 50B) for encoding data for efficient and error free transmission over the data link, a serializer (60A, 60B) for converting the encoded data from parallel format to serial format, and link interface and driver means (110A, 110B) for transmitting serialized encoded data into the serial data link and in that the receive section of each of the sub-adapters comprises a receiver (80A, 80B) for receiving the encoded serialized data, a deserializer (90A, 90B) for converting the serial encoded data to parallel format, a decoder (100A, 100B) for recovering digital data in an error free form, and interface means (110A, 110B) for reconstructing data and control signals in the predetermined protocol for transmission to the one or more peripheral device controllers or to the channel.
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公开(公告)号：DE3678309D1
公开(公告)日：1991-05-02
申请号：DE3678309
申请日：1986-01-24
Applicant: IBM
Inventor： FREDERICKS KENNETH JAMES , GUERRIERO THOMAS WAYNE , MIRACLE GERALD HOLT , WIEGAND MICHAEL ROGER
Abstract: @ Data is transferred between a channel (42) and a control unit (13) in interlocked mode or in data streaming mode over a conventional parallel bus and a serial link that permits the control unit and the channel to be located farther apart than the length of the parallel bus. The serial link carries frames - (30) for the rise of the data transfer tags but not their fall, and these tags on the parallel bus are dropped by two circuits that connect the serial link to the parallel bus. In data streaming mode, one data transfer tag is dropped when the next data transfer tag is received on the serial link. The circuit at the control unit end of the serial link detects a pause in the tags to begin an operation to drop the last data transfer tags and both circuits respond to other conditions to drop the last data transfer tags according to the protocol of the parallel 'bus.
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公开(公告)号：DE69228904T2
公开(公告)日：1999-11-25
申请号：DE69228904
申请日：1992-06-16
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , FREDERICKS KENNETH JAMES , HEFFERON EUGENE PAUL , MERITT ALLAN SAMUEL , MOFFITT GERALD THOMAS
Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.
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公开(公告)号：DE69228904D1
公开(公告)日：1999-05-20
申请号：DE69228904
申请日：1992-06-16
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , FREDERICKS KENNETH JAMES , HEFFERON EUGENE PAUL , MERITT ALLAN SAMUEL , MOFFITT GERALD THOMAS
Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.
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公开(公告)号：MX9204928A
公开(公告)日：1993-03-01
申请号：MX9204928
申请日：1992-08-26
Applicant: IBM
Inventor： BROWN PAUL JOSEPH , FREDERICKS KENNETH JAMES , HEFFERON EUGENE PAUL , MOFFIT GERALD THOMAS , MERITT ALLAN SAMUEL
Abstract: A method for acquiring the node identifier of a node in a data processing input/output (I/O) system having a plurality of nodes. This procedure is part of the initialization of each node in the I/O system and may be used to establish the configuration of the I/O system such that if a connection breaks or a fault occurs between nodes, the configuration can be confirmed after the break or fault is corrected. This prevents data from being sent to the wrong device if lines were connected in a different configuration during the correction of a fault. The node identifier is a worldwide-unique identifier such that only one node is identified by a node identifier. The node identifier contains a validity code that specifies if the node identifier is valid. Also disclosed is a retry procedure for retrying the acquisition of a node identifier if the acquired node identifier is not valid, and a deferral procedure which defers the retry procedure if a link is not available.
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Patent Agency Ranking
公开(公告)号：DE69312589T2
公开(公告)日：1998-02-19
申请号：DE69312589
申请日：1993-05-07
Applicant: IBM
Inventor： BRICE FRANK WILLIAM , ELLIOTT JOSEPH CHARLES , FREDERICKS KENNETH JAMES , GALBRAITH ROBERT EDWARD , HALMA MARTEN JAN , HOUGH ROGER ELDRED , JOHN SUZANNE MARIE , MALINOWSKI PAUL ANTHONY , MERITT ALLAN SAMUEL , OAKES KENNETH JAMES , RATHJEN JOHN CORD , SACHS MARTIN WILLIAM , STUCKI DAVID EMMETT , WYMAN LESLIE WOOD
Abstract: Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.
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公开(公告)号：DE68928381D1
公开(公告)日：1997-11-20
申请号：DE68928381
申请日：1989-07-14
Applicant: IBM
Abstract: The present invention relates to apparatus for transmitting data between a central processor (12) and one or more remote peripheral devices (30, 32, 34) comprising one or more channels (14) connected between the processor and one or more peripheral device controllers (24, 26, 28) for controlling one or more peripheral devices (30, 32, 34) in response to signals from the channel in accordance with a predetermined communications protocol, and a serial data link adapter (17) connected between one of the channels and one or more of the peripheral device controllers for extending the range of communications between the channels and the controllers. According to the invention, the apparatus is characterised in that the serial data link adapter (17) comprises first and second sub-adapters (16, 20) each communicating with the other across the serial data link and each sub-adapter having transmit and receive sections, in that the transmit section of each of the sub-adapters comprises frame generation means (40A, 40B) responsive to signals received from the channel (14) and the peripheral device controllers respectively, the signals conforming to the predetermined protocol, the frame generation means including means for generating one or more unique start frame characters in response to control signals received by the frame generation means, means for generating predetermined idle characters, the idle characters having an error imune relationship with the start frame characters, such that idle characters having single and double bit errors transmitted on the serial data link will not be recognized as start frame characters, an encoder (50A, 50B) for encoding data for efficient and error free transmission over the data link, a serializer (60A, 60B) for converting the encoded data from parallel format to serial format, and link interface and driver means (110A, 110B) for transmitting serialized encoded data into the serial data link and in that the receive section of each of the sub-adapters comprises a receiver (80A, 80B) for receiving the encoded serialized data, a deserializer (90A, 90B) for converting the serial encoded data to parallel format, a decoder (100A, 100B) for recovering digital data in an error free form, and interface means (110A, 110B) for reconstructing data and control signals in the predetermined protocol for transmission to the one or more peripheral device controllers or to the channel.
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公开(公告)号：DE69312589D1
公开(公告)日：1997-09-04
申请号：DE69312589
申请日：1993-05-07
Applicant: IBM
Inventor： BRICE FRANK WILLIAM , ELLIOTT JOSEPH CHARLES , FREDERICKS KENNETH JAMES , GALBRAITH ROBERT EDWARD , HALMA MARTEN JAN , HOUGH ROGER ELDRED , JOHN SUZANNE MARIE , MALINOWSKI PAUL ANTHONY , MERITT ALLAN SAMUEL , OAKES KENNETH JAMES , RATHJEN JOHN CORD , SACHS MARTIN WILLIAM , STUCKI DAVID EMMETT , WYMAN LESLIE WOOD
Abstract: Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.
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公开(公告)号：DE69113727T2
公开(公告)日：1996-05-30
申请号：DE69113727
申请日：1991-06-13
Applicant: IBM
Inventor： FREDERICKS KENNETH JAMES , LYNCH KENNETH ROBERT
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公开(公告)号：DE69113727D1
公开(公告)日：1995-11-16
申请号：DE69113727
申请日：1991-06-13
Applicant: IBM
Inventor： FREDERICKS KENNETH JAMES , LYNCH KENNETH ROBERT
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