Method for outputting transparent text

Details Method for outputting transparent text Method for outputting transparent text

1992-12-08

1994-04-05

Oberley, Alvin E.

Computer graphics processing and selective visual display system

Display peripheral interface input device

345141, G09G 128

Patent

active

053009460

ABSTRACT:
The outputting of transparent text to a video display is improved by decreasing the time it takes to output the text. The time savings are realized by eliminating the "OUT" instruction that is particularly time consuming. This invention is especially well-adapted for use with a video graphics array (VGA) type video adapter.

REFERENCES:
Barden, W. "Color Computer Assembly Language Programming" Tandy .COPYRGT.1983 pp. 31, 39-41.
Ferraro, R. "Programmer's Guide To The EGA and VGA Cards". Addison-Wesley. 1988 pp. 14, 17, 229-231.
IBM Personal System/2 and Personal Computer Bios Interface Technical Reference. 1987 (1st Ed) pp. 4-95, 4-96, and 4-99.
M. Abrash, "Write Mode 3 of the VGA"; 1988 Programmer's Journal 6.1: 16-23, 1988.
M. Abrash, "Faster Circles for the VGA"; 1990 Programmer's Journal 8.2: 18-31, 1990.

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