VGA: Simplify scrolling implementation.

Check for nblines==0 in calling function.
Eliminate full screen clearing optimization.
2 files changed
tree: 72514fba89cc830ec328edeea0b09fa0b444fd42
  1. .gitignore
  2. COPYING
  3. COPYING.LESSER
  4. Makefile
  5. README
  6. TODO
  7. src/
  8. tools/
  9. vgasrc/