It occurred to me that Karim Forsthofer wrote in gmane.os.netbsd.general:
> Hello netbsd-folks
>
> I would like to know which NetBSD version I should install on a very old
> notebook?  It has a 486 processor, 4MB of RAM and 170MB diskspace. It`s not
> much, but don`t want to run fancy tools on it or X. The only thing that is
> important to me is the SDCC compiler  (sdcc.sourceforge.net) I hope it will
> work with this little RAM.

Don't get me wrong, it's not my habit to suggest using something else,
but..

Maybe you're better off with running the DOS version of SDCC. See
http://www.geocities.com/SiliconValley/Vista/6552/sdcc.html