PowerBook Screen Tester is a utility I made so people with Active-Matrix displays can test for screen flaws on their PowerBook (170, 180 or 180c). Instead of changing the Desktop pattern like Macworld (August 1993, pg. 91, Test Your Display Flaws) suggested, this will make the entire screen the color you want it to be. (You can’t see if a pixel is stuck in the menu bar and an icon might be in the way using the Desktop pattern way)
From Macworld August 1993 pg. 91, (Test Your Display Flaws,
By: Cary Lu, Macworld Lab testing supervised by Mark Hurlow and Danny Lee):
“To find flawed subpixels, fill the screen with red, green, blue, and black in turn. Then use a magnifying glass to view each pixel…(with the screen red)… A red subpixel stuck dark yields a black pixel; a green subpixel stuck bright yields a yellow pixel; and a blue subpixel stuck bright yields a magenta pixel”
Some of the routines in it were from “Macintosh Programming Secrets”, by: Scott Knaster and Keith Rollin, from Addison Wesley; and from “Macintosh C Programming Primer Volume I (second edition)”, by: Dave Mark and Cartwright Reed, from Addison Wesley. (I recommend both books to people beginning to learn Macintosh C in the Symantec Think C environment). I recommend Macworld to Mac user’s who want to learn more about their machine, and read software reviews.
If you have any comments or suggestions (or a better looking icon) for me, please send them via E-Mail to MacneilS.
P.S. By the way, if you want to know how I saved this TeachText file with the newspaper icon on it and how I was able to put a picture in it; or you want to know how to type correct quotes (notice how I use “, ”, ‘ and ’, instead of using the inch and foot marks (" and ') ). Send some E-Mail asking how, and I will tell you.