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- Dscrnsav Screen Saver
-
- Dscrnsav is a screen saver program which works on CGA, MDA,
- HGA, EGA, and VGA display adapters in text as well as graphics
- modes. The program is run from the command line by typing
- "dscrnsav" with no parameters. Once resident, there is a fixed
- delay of five minutes with no keyboard activity before blanking.
- The program can be disabled by typing "dscrnsav d" at the
- command line, and re-enabled by typing "dscrnsav".
-
- The program works by periodically shifting the starting
- address of the display buffer instead of blanking the screen.
- This technique has the advantage of being universal to all
- display adapters in text as well as graphics modes. In
- addition, no memory is required to save the current screen and
- the user is able to tell that the screen is active. Dscrnsav
- occupies about 800 bytes of ram when resident.
-
- Dscrnsav should be disabled before running programs which
- do not use the keyboard or that re-program the timer tick rate
- (Flight Simulator). The program and source code are placed in
- the public domain.
-
- David Markovitch
- 1/14/90
-