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Pluggable Duplexed I/O Port

IP.com Disclosure Number: IPCOM000067568D
Original Publication Date: 1979-Aug-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Cheng, JM [+details]

Abstract

This article describes a pluggable duplexed I/O port for display of byte serialized data, inbound to or outbound from an attached device. The port comprises an outbound path formed from a first stack of m-byte loadable registers (Z1, Z2) and m-displays (D1, D2) coupling the counterpart registers. The port further includes an inbound path formed from a second stack of byte-loadable registers (Z3, Z4), and common controls for accessing the paths, including a first element for regulating the stack lengths and for reading, writing, and clearing the stacks.