8 Jun
2005
8 Jun
'05
6:52 a.m.
>>>> "Eric" == Eric Smith
<eric at brouhaha.com> writes:
Eric> Paul wrote:
> Apart from the obvious "if it's hex it
must be Unibus" there isn't
> a surefire way to tell things apart.
Eric> DEC made *many* hex modules that are not Unibus. There are hex
Eric> Omnibus modules for the 8/a, and plenty of hex non-Unibus
Eric> modules in the KL10 (PDP-10) and some early VAXen. There were
Eric> also "extended hex" modules used in the KS10 and other early
Eric> VAXen.
Sure. I should have been more precise. The original question was:
"how can I tell by inspection whether a board is Unibus, Q18, or Q22?"
Given just those three choices, what I said is accurate -- hex can't
be Qnn so it must be Unibus by process of elimination.
paul