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Browse Prior Art Database

Telnet Data Entry Terminal option (RFC0732)

IP.com Disclosure Number: IPCOM000003779D
Original Publication Date: 1977-Sep-12
Included in the Prior Art Database: 2000-Sep-13
Document File: 24 page(s) / 55K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J.D. Day: AUTHOR

Abstract

1. Command Name and Code:

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 5% of the total text.

NWG/RFC# 732 DAY 13-Sep-77 18:38 41762

Data Entry Terminal Option

Network Working Group John Day

Request for Comments: 732

NIC: 41762 12 September 1977

Obsoletes: 731

Telnet Data Entry Terminal Option

1. Command Name and Code:

DET 20

2. Command Meanings

IAC WILL DET

The sender of this command REQUESTS or AGREES to send and receive

subcommands to control the Data Entry Terminal.

IAC WONT DET

The sender of this command REFUSES to send and receive subcommands

to control the Data Entry Terminal.

IAC DO DET

The sender of this command REQUESTS or AGREES to send and receive

subcommands to control the Data Entry Terminal.

IAC DONT DET

The sender of this command REFUSES to send and receive subcommands

to control the Data Entry Terminal.

The DET option uses five classes of subcommands 1) to establish the

requirements and capabilities of the application and the terminal, 2)

to format the screen, and to control the 3) edit, 4) erasure, and 5)

transmission functions. The subcommands that perform these functions

are described below.

The Network Virtual Data Entry Terminal (NVDET)

The NVDET consists of a keyboard and a rectangular display. The

keyboard is capable of generating all of the characters of the ASCII

character set. In addition, the keyboard may possess a number of

function keys which when pressed cause a FN subcommand to be sent.

NWG/RFC# 732 DAY 13-Sep-77 18:38 41762

Data Entry Terminal Option

(Although most DET's will support one or more peripheral devices

such as a paper tape reader or a printer, this option does not

consider their support. Support of peripheral devices should be

treated by a is a separate option).

The screen of the data entry terminal is a rectangle M characters by

N lines. The values of M and N are set by negotiating the Output

Line Width and Output Page Size options, respectively. The next

writing position (x,y) on the screen (where x is the character

position and y is the position of the line on the screen) is

indicated by a special display character called the cursor. The

cursor may be moved to any position on the screen without disturbing

any characters already on the screen. Cursor addressing in existing

terminals utilizes several topologies and addressing methods. In

order to make the burden of implementaton as easy as possible this

protocol supports two topologies (the finite plane and the helical

torus) and three addressing methods ((x,y); x and y, and relative

increments). Since the finite plane with absolute addressing is the

least ambiguous and the easiest to translate to and from the others,

it is the default scheme used by the NVDET. The torodial form with

either relative or absolute address...