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NETCRT - a character display protocol (RFC0205)

IP.com Disclosure Number: IPCOM000007198D
Original Publication Date: 1971-Aug-06
Included in the Prior Art Database: 2002-Mar-05
Document File: 14 page(s) / 28K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R.T. Braden: AUTHOR

Abstract

The UCLA Campus Computing Network (CCN) node intends to provide Network access to its conversational remote job entry system URSA. The URSA system is display-oriented, supporting only character displays with local buffers (originally IBM 2260 displays, now CCI 301 TV display consoles). This document defines a third-level protocol called NETCRT which allows a Network user in a remote Host to look like a CCI console to URSA. NETCRT is defined in terms of a virtual character display ("VCD") terminal, simulated by a process in the user host.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 15% of the total text.

Network Working Group                                          R. Braden

Request for Comments: 205                                       UCLA/CCN

NIC: 7172                                                  6 August 1971

                 NETCRT - A CHARACTER DISPLAY PROTOCOL

   At the May NWG, meeting, CCN circulated dittoed copies of a proposed

   character-display protocol NETCRT.  Since that time, NETCRT has been

   revised significantly; the current version is now being published as

   an RFC, as promised last May.

   NETCRT was developed because a particular site (RAND) requested

   Network access to URSA, CCN's display-based crje system.  The primary

   use of URSA at UCLA is conversational remote job entry from a display

   terminal: entering and editing program text, submitting programs for

   batch execution, and examining job output; URSA is not a general-

   purpose time-sharing system.

   URSA's text editor is designed for a fast updating character display

   and cannot be used in any reasonable way from a typewriter-like

   console.  Therefore, a simple TELNET protocol is not adequate for

   using the crje function of URSA.  Furthermore, we have assumed that

   other ARPA sites will have their own text editors, well matched to

   their own terminals and systems.  Therefore, CCN has implemented

   NETRJS (see RFC #189), to provide remote job submission and retrieval

   services, before implementing NETCRT.

   There are a number of other functions in URSA besides crje; some of

   these would probably be useful to remote users.  URSA contains a

   comprehensive STATus service, whose constantly-updating displays are

   "windows" into the operation of the machine and the operating system,

   allowing a user to watch the progress of his jobs through the system.

   URSA also includes on-line data set (file) utilities, convenient for

   a user with files stored at CCN.  To obtain access to these

   facilities, a few sites which use CCN heavily may want to implement

   NETCRT.  The schedule for implementation of NETCRT at CCN to allow

   Network access to URSA will depend upon the existence of a user site

   that wants the service and that will write a suitable NETCRT user

   process.  Interested sites are urged to contact the CCN Technical

   Liaison, Bob Braden.

   Even though the implementation schedule for NETCRT is nebulous, we

   are publishing the specs now for several reasons.  First, we would

   like comments and criticisms.  Furthermore, NETCRT contains some

   features which may be useful in the protocol(s) now being developed

   for full graphical displays.

Braden                                                          [Page 1]

RFC 205          NETCRT - A CHARACTER DISPLAY PROTOCOL     6 August 1971

NETCRT PROTOCOL - VERSION 3

A. INTRODUCTION

   The UCLA Campus Computing Network (CCN) node intends to provide

   Network access to its conversational remote job entry system URSA.

   The URSA system is display-oriented, supporting only character

   displays with local buffers (originally IBM 2260 displays, now CCI

   301 TV display consoles).  This document defines a third-level

   protocol called NETCRT which allows a Network user in a remote Host

   to look like a CCI console to URSA.  NETCRT is defined in terms of a

   virtual character display ("VCD") terminal, simulated by a proc...