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公开(公告)号：DE69532872D1
公开(公告)日：2004-05-19
申请号：DE69532872
申请日：1995-05-16
Applicant: IBM
Inventor： BEERS GREGORY EDWARDS , BREWER JAMES ARTHUR , HABERMEHL PAUL ROBERT , STAFFORD JAMES MICHAEL
IPC: G06F13/00 , H04H20/00 , H04L12/28 , H04L12/403 , H04L12/64
Abstract: A system and method makes use of the line-in, (300,304) line-out (300,306) connectors for each right (203a) and left (203) stereo channels of an audio card (40) to provide a communications network. The distributed computers are connected in a master/slave configuration. All of the slave systems have the line-in ports, and the line-out ports, connected together. The master system line-out is connected to each slave system line-in port, and the slave system line-out ports are connected to the master line-in port, for each channel. A communications protocol is provided wherein the master system allows audio and data information to be simultaneously transferred between the master and slave systems. The master provides a clock signal and performs arbitration in order to facilitate the information transfer. During steady state conditions, the slave systems will immediately transfer the clock signals, and data packets, from their line-in channel to their line-out channel. If either the master or slave systems recognize their address on the packet received on the line-in channel, then the information is decoded and processed by a digital signal processor (DSP) on the audio card. Audio information and data can then be input to the host system (master or slave) for display on the computer screen. A reduction in the magnitude of the control signal output by the slave systems signals the master that a slave is requesting the network. Once the network is granted to a slave, a data packet containing both audio and text information can be output to another computer on the system.
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公开(公告)号：DE3408045A1
公开(公告)日：1984-12-06
申请号：DE3408045
申请日：1984-03-05
Applicant: IBM
Inventor： BREWER JAMES ARTHUR , KUMMER DAVID ALLEN , LANGGOOD JOHN KENNEDY
Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 to which eight other cards controlling various I/O devices can be connected. Seven of the eight I/O connectors are interconnected to a conventional I/O bus. The eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.
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公开(公告)号：GB2139007B
公开(公告)日：1986-10-01
申请号：GB8405863
申请日：1984-03-06
Applicant: IBM
Inventor： BREWER JAMES ARTHUR , KUMMER DAVID ALLEN , LANGGOOD JOHN KENNEDY
Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 to which eight other cards controlling various I/O devices can be connected. Seven of the eight I/O connectors are interconnected to a conventional I/O bus. The eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.
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公开(公告)号：GB2139007A
公开(公告)日：1984-10-31
申请号：GB8405863
申请日：1984-03-06
Applicant: IBM
Inventor： BREWER JAMES ARTHUR , KUMMER DAVID ALLEN , LANGGOOD JOHN KENNEDY
Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 to which eight other cards controlling various I/O devices can be connected. Seven of the eight I/O connectors are interconnected to a conventional I/O bus. The eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.
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公开(公告)号：FR2542556A3
公开(公告)日：1984-09-14
申请号：FR8321050
申请日：1983-12-28
Applicant: IBM
Inventor： BREWER JAMES ARTHUR , KUMMER DAVID ALLEN , LANGGOOD JOHN KENNEDY
Abstract: Printed-circuit board comprising six superposed layers, three of which are signal-flow layers, one is a layer for supplying voltages and the other two are earthing planes. This arrangement makes it possible to mount, on the upper layer which carries the various components of the computer, up to eight connectors J1-J8 to which other printed-circuit boards controlling various input/output devices may be connected. Seven of the connectors J1-J7 are connected to a conventional I/O bus, whereas the eighth, J8, is connected to certain of the lines of the I/O bus and to certain of the lines of the internal bus of the board.
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Patent Agency Ranking
公开(公告)号：BR8401006A
公开(公告)日：1984-10-16
申请号：BR8401006
申请日：1984-03-01
Applicant: IBM
Inventor： BREWER JAMES ARTHUR , KUMMER DAVID ALLEN , LANGGOOD JOHN KENNEDY
Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 to which eight other cards controlling various I/O devices can be connected. Seven of the eight I/O connectors are interconnected to a conventional I/O bus. The eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.
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公开(公告)号：BR8401005A
公开(公告)日：1984-10-16
申请号：BR8401005
申请日：1984-03-01
Applicant: IBM
Inventor： BREWER JAMES ARTHUR , LANGGOOD JOHN KENNEDY , MARKHAM HARVEY ROSSEN
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公开(公告)号：IT8419882D0
公开(公告)日：1984-03-02
申请号：IT1988284
申请日：1984-03-02
Applicant: IBM
Inventor： BREWER JAMES ARTHUR , LANGGOOD JOHN KENNEDY , MARKHAM HARVEY ROSSEN
Abstract: A six-layer printed circuit card has first, third and sixth layers which are signal carrying layers for interconnecting various components forming a personal computer. The second and fifth layers are both ground plane layers and the fourth layer of the card is a voltage plane. The components on the printed circuit card include eight input/output (I/O) connectors J1 - J8 to which eight other cards controlling various I/O devices can be connected. Seven of the eight I/O connectors are interconnected to a conventional I/O bus. The eighth connector J8 is interconnected to some lines of the I/O bus and to some lines of the signal carrying layers which form an internal bus.
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公开(公告)号：GB2360105A
公开(公告)日：2001-09-12
申请号：GB0023896
申请日：2000-09-29
Applicant: IBM
Inventor： BREWER JAMES ARTHUR , GUPTA SANJAY
IPC: H03M7/30
Abstract: A means for increasing the amount of data that can be stored and retrieved within the memory of a data processing system using data compression. Data is generated that is to be stored in the RAM memory, then compressed with a memory controller in the data processing system and then stored in the RAM memory. When the data needs to be retrieved, the compressed data is retrieved from the RAM memory, decompressed within the memory controller and then forwarded.
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公开(公告)号：FR2557754B3
公开(公告)日：1986-01-03
申请号：FR8321051
申请日：1983-12-28
Applicant: IBM
Inventor： BREWER JAMES ARTHUR , LANGGOOD JOHN KENNEDY , MARKHAM HARVEY ROSSEN
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