Accession Number:

AD0857408

Title:

Message Composition Applique.

Descriptive Note:

Final rept. Jan 68-Jan 69,

Corporate Author:

COMPUTING DEVICES OF CANADA LTD OTTAWA (ONTARIO)

Personal Author(s):

• Moulding, David G.
• Stone, Roger N.

Report Date:

1969-01-01

Pagination or Media Count:

387.0

Abstract:

This report presents designs for a component of the input-output system at every MALLARD terminal concerned with written messages. The Message Composition Applique MCA serves as a storage buffer between one or more teletypewriters and the high-speed 2400 baud MALLARD line. The MCA is essentially a small, special-purpose digital computer designed for use by technically unskilled personnel in a forward area environment. The operating procedure is communications-orientated and ensures that messages are prepared in a form suitable for transmission through an automatically switched communications system. The procedure allows editing, correction and verification of a stored message, and automatic insertion of pre-recorded data. Received messages are printed out in order of precedence times of arrival determine printout order within a precedence level. Two levels of message precedence are pre-emptive. The transmission or reception of a message is completely automatic and typically takes a few seconds.

Descriptors:

• *COMMUNICATION AND RADIO SYSTEMS
• *COMPUTERS
• *INPUT OUTPUT DEVICES
• TACTICAL WARFARE
• COMPUTER PROGRAMS
• MEMORY DEVICES
• COMPUTER LOGIC
• INTERFACES
• AUTOMATIC
• SWITCHING CIRCUITS
• TELETYPE SYSTEMS
• DATA TRANSMISSION SYSTEMS
• TYPEWRITERS

Subject Categories:

• Computer Programming and Software
• Computer Hardware
• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE