Theoretically it might be _possible_ with enough hacking but not realistically so.
You can't boot directly into NetBSD on a 68k Mac. The Mac OS has to boot first then the Booter application boots NetBSD. Once NetBSD is installed you can setup the Booter to run and boot the system automatically but you will need a mouse and keyboard to do the install and setup the Booter.

On 3/16/2000 at 00:13, Thilo.Manske@HEH.Uni-Oldenburg.DE (Thilo Manske) wrote:

> Is it possible to install NetBSD on a Performa 450 (AFAIK aka LCIII)
> without an adb keyboard or mouse?
> (I have no ADB-devices, but serial cables and other (non-MAC) computers
> with scsi interfaces are available).
> 
> And if not: Is it possible to do it with just a keyboard (I may
> get one) but no mouse?
> 
> Sorry, I know next to nothing about Macintosh computers...
> -- 
> Dies ist Thilos Unix Signature! Viel Spass damit.
> 
>