stacks: There is no need to disable NMI if it is already disabled

Don't write to the cmos index port on a mode switch if NMI is already
disabled.  This reduces the number of outb() calls.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
1 file changed
tree: d81323795bbb88b25c5e92c26cb31241e66ab9f8
  1. .gitignore
  2. COPYING
  3. COPYING.LESSER
  4. Makefile
  5. README
  6. docs/
  7. scripts/
  8. src/
  9. vgasrc/