3 Jun
2005
3 Jun
'05
4:39 p.m.
Teradyne-built items; I don't recognize the bus --
two edge connectors,
each wider than qbus. It doesn't look like the unibus cards I've seen.
Unibus and Qbus use the same double-sided 36 pin (18 pin per side) 0.125"
pitch connectors. Q bus boards are normally dual or quad, Unibus are
normally quad or hrx.
(The converse is not true. A quad board could be just about anything, the
11/44 CPU boards are hex height, but must go into the right slots, not
just into any Unibus slot, etc)
The first small cabinet (9764, I think?) contains three RA81 drives;
one is labeled 'bad hda'.
I hope you locked the positioners on those drives (white lever on top of
the HDA) before moving them, otherwise you have 3 bad HDAs now.
I haven't had the CPU out on its rails yet, so I
don't know what's
inside. I'm going to have to work on power outlets before I can
even try to run this beast. (And yes, I intend to look through the
archives for tips on proper pre- and first-power-up etiquette before I
blow anything up)
The 11/44 PSU is the second most complicated I've ever worked on (it was
the most complicated until I worked on an HP9845..) It's also got some
lethal features, like 400V DC, straight from the mains, on barrier strip
terminals inside. Please ask here (or me directly) before diving inside
the PSU.
-tony