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Level 0 Graphic Input Protocol (RFC0336)

IP.com Disclosure Number: IPCOM000003529D
Original Publication Date: 1972-May-05
Included in the Prior Art Database: 2000-Sep-13
Document File: 2 page(s) / 4K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

I.W. Cotton: AUTHOR

Abstract

Level 0 Graphic Input Protocol

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 75% of the total text.

NIC 9929 Ira Cotton

NWG/RFC #336 Mitre

Level 0 Graphic Input Protocol 5 May 1972

Level 0 Graphic Input Protocol

At its meeting on April 16-18 the network Graphics working

group began to consider the definition of levels of protocol

for graphic Input Protocol. The following describes the

Level 0 graphics input protocol.

The philosophy guiding the establishment of this protocol is

the same as suggested in RFC #178, "Network Graphic Attention

Handling." Briefly, all input will be described by type,

origin, and length, followed by the actual data.

Only two types of input are defined at Level 0: text and

simple position.

Text Input

Text input will be conveyed in the following format:

TEXTIN : DEVICE : COUNT: Text String

TEXTIN is a protocol code indicating the nature of this

input string. For the present this code is defined to

be 1.

DEVICE is a code indicating the device from which the

input originated. The following codes are presently

defined:

0 - unspecified device

1 - primary keyboard

2 - tablet

3 - mouse

4 - joystick

5 - lightpen

6 - cursor

7 - keyset

8 - mouse & keyset

NIC 9929

NWG/RFC# 336

Level 0 Graphic Input Protocol

Count is an integer number indicating the number of

characters (bytes) which follow.

Text String is a string of "Count" bytes of characters

in network ASCII.

Position Input

Simple position data will be conveyed in the

following format:

POSIT : DEVICE : COUNT : x : y

POSIT is a protocol code indicating that this string

contains position data. For the present this code is

defined to be 2.

DEVICE is a code indicating the input device on which

this data was generated. The codes are as defined

above.

COUNT is an integer number indicating the number of

bytes of data which follow. This includes data for

both x and y coordinates. Thus,...