Sets the video mode to Text output. There are 4 modes (0,1,2 and 3).
0 - 80x25 normal
1 - 80x25 pc-8 (IBM style graphics chars)
2 - 80x12 normal
3 - 80x12 pc-8
Changing screen mode clears the screen and set the cursor to the top-left.
SCREENMODE 2
See Also: Gaphics Functions