I/O SYSTEM OF A DATA PROCESSING SYSTEM

I/O SYSTEM OF A DATA PROCESSING SYSTEM

A system structured to transfer control information between an I/O interface adapter (IFA) and an I/O processor, and I/O data between an IFA and a channel data buffer (CDB) has separate interfaces for these transfers. The control interface includes a multi-mode, bidirectional control data bus, a con...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: RUSH, ROBERT GLOVER, JAMES, PETER N, ULSH, GREGORY STEVEN, WOLSKI, MARK JAMES, JACKOWSKI, STEFAN PETER, MOYER, JAMES THEODORE, HESTER, RICHARD LEE
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:A system structured to transfer control information between an I/O interface adapter (IFA) and an I/O processor, and I/O data between an IFA and a channel data buffer (CDB) has separate interfaces for these transfers. The control interface includes a multi-mode, bidirectional control data bus, a control mode bus for establishing the mode of the bus, and a check interface on which the IFA provides error information. The data interface includes a multi-mode, bidirectional data transfer bus, respective SYNC and ACCEPT lines for transferring time-phased control signals to establish the mode of the data transfer bus, and a parity line to indicate to the IFA the parity of the SYNC and ACCEPT lines.