field maintenance print sets - test-drb@ccmp.vtda.org

12 Aug 1999

I also have several quad wide Qbus cards with plastic handles.  Be carefull
many even look the same at a glance.  I have several Emulex UC08's (Quad
wide Qbus with 2 SCSI ports) and a UC18 (Quad wide Unibus with 2 SCSI ports)
and they look VERY similiar at a glance.  Both have only plastic handles.
The Mentec M90 CPU has plastic handles and the M100 has metal rail /
ejectors.

Dan

...
 >
> >   The easy way to tell a quad pdp11 board from a quad pdp8 board is to
look at
...
 > > the top and see if it's got metal ejector
handles or plastic "flip chip" style
...
 > > handles.  pdp11 boards have a metal spine and
metal ejector handles, pdp8
...
    boards have the plastic handles. 
 This isn't the case. There are several quad height Unibus/pdp-11 cards
 that have plastic handles! Check the field guide or ask on the list! 
For quad and hex cards :

The general-ish rule is that boards that fill the full width of the
standard (for them) cardcage have metal handles, those that don't have
plastic handles.

So Hex height unibus cards have metal handles. Quad height unibus cards
have plastic handles (because they don't fill a hex height slot), but
quad height Q-bus cards have metal handles (becuase Q-bus backplanes are
normally quad height.

PDP8 Omnimbus quad cards have plastic handles. I guess that's becuase
they originally didn't go into guides/a cardcage so the metal ejector
handles aren't any use.

-tony 