Attempting to Resurrect Sun3/50 w/ NetBSD

I have inherited a diskless Sun 3/50M 4MB RAM.  I have read the general 
diskless How-to and the sun3 specific one.

My problem is that Sun3 attempts to boot over the ethernet  le (0,0,0) 
to no avail.  I cannot get back to the Prom monitor at all.  I've looked 
all over the place for monitor command list etc to no avail.  Can anyone 
send me a cheat sheet showning basic PROM commands.  Is there a 
self-test command etc?  Once it begins running its RARP how can I abort 
that and get back to the > prompt?

My machine appears to be attempting to get an IP address for its MAC 
address using RARP.  I have a RARPD server running
on a 386I machine runnning NetBSD3.1.  Nothing is happening.  No 
indications from RARPD -a -d showing anything from the SUN3 and nothing 
but a rolling |/-|\ pattern on the Sun.  I'm ignorant on a lot of this 
stuff, but I'm persistent.

Can anyone familiar with Sun3/50 respond with some coaching?  Even 
better if you have succeeded in booting NetBSDx.x on this machine/RAM 
config.

Thanks
David
Electron Sciences
Birmingham, AL

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