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公开(公告)号：BR7702817A
公开(公告)日：1978-02-28
申请号：BR7702817
申请日：1977-05-02
Applicant: IBM
Inventor： BOUKNECHT M , BOURKE D , VERGARI L
Abstract: Improvements introduced in a peripheral device control unit with improved counting logic, for use in a data processing system including a central processing unit, a memory unit, a logic input-output control unit and a line general coupling (i/f). (Machine-translation by Google Translate, not legally binding)
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公开(公告)号：BR7800089A
公开(公告)日：1978-10-24
申请号：BR7800089
申请日：1978-01-06
Applicant: IBM
Inventor： VERGARI L , BOUKNECHT M
Abstract: In a data processing system which includes a base central processing unit, channel, and input/output (I/O) interface to which peripheral devices may be attached, a special attachment is disclosed. The attachment made to the base I/O interface includes connector circuitry which is required when the signals on the input/output interface must be repowered to peripheral devices in an expansion input/output unit, power isolation must be provided between a base data processing system and I/O expansion unit, or a remote peripheral device is to be attached to the base data processing system I/O interface. The connector circuit includes logic which responds to the normal I/O interface signals to energize drivers in the connector circuit to achieve repowering of signals on bidirectional signal lines and unidirectional signal lines.
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公开(公告)号：BR7702823A
公开(公告)日：1978-04-04
申请号：BR7702823
申请日：1977-05-02
Applicant: IBM
Inventor： DAVIS M , BOUKNECHT M , VARGARI L
Abstract: A peripheral device control unit with improved input-output coupling logic circuits for use in a data processing system including a central computer unit, a memory unit, input-output control logic circuits and a line general coupling having a plurality of lines for interconnecting the units in parallel. (Machine-translation by Google Translate, not legally binding)
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