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Interconnection Between One-Byte Channel and Two-Byte Control Unit

IP.com Disclosure Number: IPCOM000047316D
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Meifert, KA [+details]

Abstract

A channel data path that is one byte wide is connected to a control unit data path that is two bytes wide. The interconnecting system has two buffer chains that are each one byte wide and each hold a few bytes of data. When the channel sends data on its one-byte data path, successive bytes are loaded alternately into the two buffer chains and the output of each chain is supplied in parallel to the two one-byte paths to the control units. When the control unit transmits data to the channel, data is loaded in parallel from the two-byte-wide bus of the control unit into the two buffer chains. Data is selected alternately at the output of the two buffer chains and is applied to the one-byte-wide path to the channel. The control unit and the channel are also conventionally connected by one-byte-wide tag lines.