- fix NetBSD not booting from cdrom. AH was not set to 0 after a   successful read through int13/AH=2 when emulation floppy from cdrom.
- fix NetBSD not booting from cdrom. AH was not set to 0 after a
  successful read through int13/AH=2 when emulation floppy from cdrom.

dbrashear/bochs,dbrashear/bochs,dariaphoebe/bochs,dbrashear/bochs,dariaphoebe/bochs,dariaphoebe/bochs,dariaphoebe/bochs,dbrashear/bochs,dariaphoebe/bochs,dbrashear/bochs