Browse Prior Art Database

Virtual Terminal management model (RFC0782) Disclosure Number: IPCOM000003831D
Original Publication Date: 1981-Jan-01
Included in the Prior Art Database: 2019-Feb-14
Document File: 24 page(s) / 26K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Nabielsky: AUTHOR [+1]

Related Documents

10.17487/RFC0782: DOI

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 11% of the total text.

A Virtual Terminal Management Model

RFC 782

prepared for

Defense Communications Agency WWMCCS ADP Directorate Command and Control Technical Center 11440 Isaac Newton Square Reston, Virginia 22090

by Jose Nabielsky Anita P. Skelton

The MITRE Corporation MITRE C(3) Division Washington C(3) Operations 1820 Dolley Madison Boulevard




1.0 INTRODUCTION 1 1.1 The Workstation Environment 1 1.2 Virtual Terminal Management 2 1.3 The Scope 3 1.4 Related Work 4

2.0 THE VTM MODEL 5 2.1 The VTM Model Components 7 2.2 The Virtual Terminal Model 10 2.2.1 Virtual Terminal Connectivity 11 2.2.2 Virtual Terminal Organization 11 The Virtual Keys 12 The Virtual Controller 12 The Virtual Display 12 2.2.3 Virtual Terminal Architecture 13 Communication Variables 13 Virtual Display with File Extension 13 Virtual Display Windows 14 2.3 The Workstation Model 17 2.3.1 The Adaptation Unit 17 2.3.2 The Executive 18





Figure Number

2.1 The Virtual Terminal Model 7 2.2 The Workstation Model 8 2.3 VT 0 (expanded from previous figure) 9 2.4 The Domains 14



Recent advances in micro-electronics have brought us to the age of the inexpensive, yet powerful, microprocessor. Closely resembling the advances of the 1960’s which brought about the transition from batch processing to time-sharing, this technological trend suggests the birth of decentralized architectures where the processing power is shifted closer to the user in the form of intelligent personal workstations. The virtual terminal model described in this document caters to this anticipated personal computing environment.

1.1 The Workstation Environment

A personal workstation is a computing engine which consists of hardware and software dedicated to serve a single user. As part of its architecture, the workstation can invoke the resources of other, physically separate components, effectively extending this personal environment well beyond the bounds of the single workstation.

In this personal environment, processing resources previously shared among multiple users now become dedicated to a single one, with a large part of these resources summoned to provide an effective human-machine interface. As a consequence, modalities of input and output that were unfeasible under the time-shared regime now become a part of a conversational language between user and workstation. Due to the availability of processing cycles, and the closeness of the user devices to these cycles, the workstation can support interactive devices, and dialogue modes using these devices, which could not be afforded before.

The workstation can provide the user with the mechanisms to conduct several concurrent conversations with user-agents located elsewhere in the global architecture. One such mechanism is the partitioning of the workstation physical display into multiple logical displays, with one or more...