🚀 go-pugleaf

In <mtu20dxaf4o.fsf@portnoy.mit.edu> nathanw@mit.edu (Nathan J Williams) writes:

>	The part of the 470 that worries me is the apparant lack of
>VME jumpers on slots 1, 2, and 3. Are they simply hidden somewhere, or
>are there constraints on what I can put in those slots? I've been
>using the 3/200 cardcage configuration tables, partly because I
>thought that it was the board interaction that was important, but
>mostly because I haven't been able to find 4/4xx configuration tables.

With a 4/4xx VME chassis, the first few slots are *only* for RAM boards
apparently, which is why they have no jumpers - RAM boards always have x03
and x04 installed in an older VME chassis anyway. The CPU board is meant
to go into slot 4 I think. Try installing your RAM boards into the first
slots, and have the terminator on the board in slot 1 (farthest from the
CPU). I only have an old 12-slot VME chassis here, so I can't give you any
first-hand advice. 

My guess is the backplane layout has the P2 memory bus ordered to the 
left of the CPU board slot rather than to the right as it is with older 
backplanes.

Regards,

Craig.

-- 
        Craig Dewick - craig@zeta.org.au - http://www.zeta.org.au/~craig  
            Professional Train Driver. Located in Sydney, Australia.
          Sun Ripened Kernels - http://www.zeta.org.au/~craig/srk.html
                Surplus and pre-loved Sun Microsystems equipment.