Turbo C graphics library

[mccaugh at sunb6.cs.uiuc.edu]

 I don't know that there is a notion of "cursor" (visible or otherwise) in
 graphics mode, as there is in text mode. Graphics mode is more "primitive'
 in that (without primitives) you have to selectively turn on pixels yourself.
 So to get a "visible cursor" at the current position, you would want to turn
 on 1 or more pixels in that vicinity.
 As to "reverse video" in graphics mode, I don't believe that exists (at least
 in a direct way) for CGA or EGA, anyway.