> From: Charles Anthony
> Configuration+Panel+WHITE:
> Hard to read the writing, but I think it is a SCU configuration panel.
Good catch! I'm still trying to get confirmation (THVV couldn't help),
but I think you may well be right.
The picture of the MIT 6180:
http://www.multicians.org/mulimg/h6180-doors-open-big.jpg
shows one of them (on the left), and since we know we have panels we are
certain are 6000-series IOM's, e.g.:
http://ana-3.lcs.mit.edu/~jnc/tech/multics/jpg/22.32.14.jpg
(which not only says 'IOM' in places, but has the switches the Multics
Operator's Manual says an IOM would have). This other panel looks _totally_
different from that, but it's definitely a 6180 panel. So... what else could
it be, if not an SCU?
> Closer examination of the memory size switches should reveal if it is a
> 256K or 4MW model.
We'd need a better picture, alas.
But if we had one, we could also read all the switch labels, and do the thing
above - look for all the switches the Multics Operator's Manual says one
would have, to confirm that it's an SCU...
> Two Thirds Maintenance panel:
> Can't make it out.
See my message about those images:
http://www.classiccmp.org/pipermail/cctalk/2017-July/036539.html
The upper part is identical to the set of three IOMs, except that it is
missing the 'Configuration' sub-panel in the lower right corner. Also, there
some closeups of it allow the labels to be read, and these seem to indicate
that it's an IOM.
Why the 'Configuration' sub-panel isn't there, I have no idea. It doesn't
look like it's simply been removed (it looks like there's no hole in the
panel, there seems to be a blank black plate over the lower part). So
maybe this was a cost-reduced version for use in simple configurations
(one CPU, one memory, etc)?
Noel
