> The NetBSD web page states that NetBSD/sparc runs on sun4 processors, 
> however when downloading the binaries (NetBSD-1.0) the INSTALL file 
> states that it will only run on sun4c machines. This has been backed up 
> by trying it on the sun4 and watching it die.

I'm pretty sure that even current sources won't work all that well.
You can get a binary that will work from theos.com:/pub/netbsd13.gz.
At least I think it will work, it has in the past worked on 4/100, 4/200,
and 4/300.