sparc 20

[Eric Dorman eld@mpl.UCSD.EDU]

Greetings,

> To: 9fans@cse.psu.edu
> Subject: Re: sparc 20
> Date: Fri, 09 Aug 1996 22:44:49 -0400
> From: Geoff Collyer <geoff@research.att.com>
> Sender: owner-9fans@cse.psu.edu
> Whatever was in sunmmu.h doesn't seem to have been critical.
> I was able to build a 9ss10 from the CD by doing
>
> 	cd /sys/src/9/ss10
> 	>sunmmu.h
> 	mk
>
> I haven't run the resulting 9ss10, however.

I have been able to build 9ss10 with the above fix and netboot it into
an SS20 from a PC bootserver but it never appears to gain control.  This
may be due to my SS20 having an RT625 HyperSPARC CPU rather than a regular
Sun CPU module, but I really don't know enough about one or the other to
even begin figuring out what's wrong (new cpu vs old cpu?).  The cpus are
apparently different enough to keep NetBSD/SPARC from working, so perhaps
in this instance Plan9 is breaking in a similar fashion.  If someone
has run Plan9 on an SS20, what cpu module did you have?

Thanks,

Eric Dorman
eld@mpl.ucsd.edu