boot —
system bootstrapping procedures
Unfortunately, on most machines, the system can't reboot itself at power-up or
  after crashes. You might have to restart the system manually. Once the system
  starts, an automatic consistency check of the file systems will be performed,
  and unless this fails, the system will resume multi-user operations.
Typical MIPS based Windows CE Handheld machines attempt to boot Windows CE
  operating system in its own boot ROM. You can't boot the
  NetBSD directly skipping Windows CE. The
  NetBSD bootloaders are provided as application
  programs on Windows CE instead. You can choose
  hpcmips/pbsdboot(8)
  or hpcboot(8). Though the
  bootloaders are application programs, they blow away the entire Windows CE OS
  and its settings when the kernel boots successfully.
Once running, a familiar window will appear. You can choose the machine type,
  kernel file location and kernel boot options with a GUI and push the button
  named “[boot]” to boot
  NetBSD.
The bootloaders have an “auto boot”
  option. If you enable this option, the specified kernel will be loaded
  automatically after a countdown.
  - /netbsd
- system kernel
- /netbsd.gz
- gzip-compressed kernel
- pbsdboot1.exe
- bootloader executable file for Windows CE version 1.01
- pbsdboot.exe
- bootloader executable file for Windows CE
- hpcboot.exe
- new bootloader executable file for Windows CE
There is no general way to launch a bootloader automatically while a few Windows
  CE machine provide an “auto run” mechanism.