Browse Prior Art Database

Bidirectional Transmission Using Standard SLT Logic

IP.com Disclosure Number: IPCOM000081247D
Original Publication Date: 1974-Apr-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Looney, GW: AUTHOR [+2]

Abstract

Through the use of an OR-DOT logic function block to gate both the driver and receiver for each bit line, a maximum efficiency in the use of cable and logic devices is attained in a data transmission line. This represents a basic improvement over the previous method of using separate "bus and tag" lines.

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Bidirectional Transmission Using Standard SLT Logic

Through the use of an OR-DOT logic function block to gate both the driver and receiver for each bit line, a maximum efficiency in the use of cable and logic devices is attained in a data transmission line. This represents a basic improvement over the previous method of using separate "bus and tag" lines.

Using the standard method, the I/O bus ENTR was tied directly to the receiver for input of data and the Buffer Control Unit (BCU) bus driver was tied directly to the EXIT for output of data, thus requiring either separate cables or limitations to one direction transmission.

As shown, the use of the OR-DOT function for receiving driver logic provides a bidirectional capability rather than a simplex integration scheme for which the Solid Logic Technique (SLT) logic was designed. The incoming data path from the I/O bus is [ENTER-OR DOT-RECEIVER-BUS IN.]. The outgoing data path is [BCU bus - DRIVER-OR DOT-EXIT-I/O Bus].

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