Browse Prior Art Database

Distributed Access to a Terminal Emulation Window

IP.com Disclosure Number: IPCOM000118528D
Original Publication Date: 1997-Mar-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Brown-Douglas, FA: AUTHOR [+3]

Abstract

Disclosed is a method to distribute a system console across a network allowing more than one image to exist.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Distributed Access to a Terminal Emulation Window

      Disclosed is a method to distribute a system console across a
network allowing more than one image to exist.

      The method uses a distributed client-server model over a local
area network where the server is a program that controls access to
the physical console and supports connection requests from multiple
logical consoles (the clients) at any node on the Local Area Network
(LAN).

      The server supports two types of consoles:  a standard console,
which is used with computer systems today, and a multiplexed console.

1.  Standard Consoles

      For standard consoles, the server program allows multiple
clients to connect to it and keeps a table of all connected clients.
Each client consists of a terminal emulation program running  at any
node on the LAN.  The server permits only one client read/write
access to the console (i.e., only one user may type in commands at
his/her node).  The other clients are all given read-only access (the
keyboard input is disabled).

      When the server receives a request from a client for a
read/write connection, it checks its tables to see if one is already
active and if so, refuses the request.  All read-only requests are
accepted.

      When a screen update is received from the host, the server
scans its tables for all connected clients and sends a copy of the
update to each one.  When the read/write client types something in,
the data is sent to the server, which sends it to the host a...