Improve serial port detection.

Add port names for serial port registers.
When detecting serial port, ignore top two bits of IIR register.
3 files changed
tree: ae57cfa4bde32747d6682ac7b80dbebc525a05a8
  1. .gitignore
  2. COPYING
  3. COPYING.LESSER
  4. Makefile
  5. README
  6. TODO
  7. src/
  8. tools/
  9. vgasrc/