Masters Theses


"This paper describes the design of a digital interface between a graphic terminal and the SCC-650 computer. The graphic terminal-computer combination can be used as a stand alone system for small applications or can be used as a satellite processor for a larger system such as the IBM System 360, The interface is designed utilizing DTL NAND type integrated circuits. Its primary functions may be divided into three main categories: (1) to give level conversion, (2) control, and (3) data manipulation. All requests for data transfers are initiated by the computer, the interface then assumes a control mode which handles the data transfer to or from the graphics terminal. Once the transfer is complete, the computer is notified that it may initiate another request. Data is converted from bit serial to parallel word form by the interface during the data transfer. A function keyboard has been implemented which may transfer any one of 2048 different command words to the computer. A software package was written in SCC-650 Assembler which will utilize the graphics terminal as an input/output processor for an electronic circuit design program such as ECAP or CIRCUS, This program will allow a user to draw the exact circuit to be analyzed on the graphics terminal and then ask for specific results to be displayed in either numerical or graphical form, The circuit may then be changed by adding or deleting elements and re-analyzed"--Abstract, page ii.


Tracey, James H.

Committee Member(s)

Tranter, William H.
Alcorn, Herbert R., 1933-2008


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


University of Missouri--Rolla

Publication Date



vi, 72 pages

Note about bibliography

Includes bibliographical references (pages 58-59).


© 1971 George Irvin Rhine, Jr., All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Interface circuits -- Design
Programming software -- Design
Electronic digital computers

Thesis Number

T 2580

Print OCLC #


Electronic OCLC #