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Browse Prior Art Database

Variable Channel Bandwidth

IP.com Disclosure Number: IPCOM000051175D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10

Publishing Venue

IBM

Related People

Authors:
Braid, RM Crooks, TL Dahl, SS Ovrebo, JD [+details]

Abstract

It is not unusual for an existing computer system to have channel data buses Which consist of two 9-bit unidirectional data buses: Data Bus Out (DBO) and Data Bus In (DBI). These two data buses provide the data path for transferring information to/from the processor from/to the I/O device. The DBO Is used when transferring a byte (9 bits) of data from the processor to the I/O device. The DBI is used for data transfer in the opposite direction. The operations of these two buses are mutually exclusive of each other. The existing I/O device attachments would use this mode of operation.