> Yesterday I could get my hands on a AViiON AV5500 machine. It has:

Cool!

> 1 CPU (What is the CPU? XC88410RC50E or XC88110RC40F)

The XC88110RC40F is a 40MHz 88110.  I don't have anything with one of
those in it.  The 88110 integrated the function of the 88100 (CPU)
and 88100 (CMMU) from the previous generation.
The 88410 is a "secondary cache controller" used with the 88110.

> I installed DG-UX 5.4R3.10 on it today. I have six big binders with
> DG-UX documentation. 

Is any of it hardware-related documentation?

> If I can help with this machine to get somthing to work I am willing to
> help.

Is there any way that you can disassemble the ROM (from the monitor,
perhaps)?

It might help somewhat (at least in our understanding of the hardware)
to get an inventory of the controller chips that are found in the 5500.
I.e., what chip(s) does it use for SCSI, serial, etc., and what kind of
interfaces/bus(ses) does it have.  I have started a page to collect some
of this information and would like to keep filling it out.

I'm hoping to have more NetBSD hacking time soon, so I can actually work
on this instead of just gabbing about it.

Thanks,
-allen