Dec boards- what are they?
pkoning at equallogic.com
Tue Jun 7 13:30:11 CDT 2005
>>>>> "John" == John Allain <allain at panix.com> writes:
>> Boards for Omnibus, Unibus, Q-bus, etc are all built to the same
>> basic dimensions, so you cazn't tell that way.
John> In general, a way in which you Can tell would be useful for
John> many of us DECies. Uni-vs-Q and Q22-vs-18 are the two
John> important ones for me.
You have to find the product name that goes with the board.
Apart from the obvious "if it's hex it must be Unibus" there isn't a
surefire way to tell things apart.
Some heuristics may work: single height boards show up in old Unibus
options (e.g., M105). If a dual height board is densely packed with
stuff, it's probably QBus, since dual height Unibus related modules
are also early modules and will have loosely packed small TTL parts on
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