Paper Info
Title
A microprocessor display controller for combining refresh and storage tube graphics
Abstract
This paper describes a stand alone graphics system utilizing a microprocessor based display controller with the capability of combining refresh with storage tube graphics. This combination is accomplished by utilizing the Write-Thru feature of a Tektronix 4014 display terminal. The display controller is a typical Z-80 microprocessor system interfaced to the 4014 by a standard Tektronix parallel interface. A portion of the Z-80 memory is used as the display buffer, allowing it to be divided into store and non-store (refreshed) segments. The microprocessor performs the conversion from the simple integer X, Y coordinates in the display buffer to actual Tektronix drawing commands. A second Z-80 microprocessor is used to perform graphical transformations and transfer the data from the PDP-11 host to the Z-80 display controller. The operations performed by the second microprocessor include translation, rotation and scaling. These operations are implemented by matrix multiplication of the user data by a user specified transformation matrix. The stand alone capabilities of the graphics system is made complete with interactive devices such as a tablet, analog dials, and function switches interfaced directly to the host computer.
Year
DOI
Venue
1978
10.1145/800248.807381
SIGGRAPH
Keywords
Field
DocType
Microprocessor display controller,Refresh display,Storage tube display,Vector graphics
Graphics,Control theory,Vector graphics,Computer graphics (images),Computer science,Microprocessor,Host (network),Computer display standard,Storage tube,Computer hardware,Parallel port
Conference
Volume
Issue
ISSN
12
3
0097-8930
Citations 
PageRank 
References 
0
0.34
2
Authors
3
Name
Order
Citations
PageRank
Steven G. Satterfield18839.09
Francisco A. Rodriguez200.34
David F. Rogers312755.08