5 Dec
1999
5 Dec
'99
2:02 p.m.
Tony Duell wrote:
I've not had too many problems using turned-pin
sockets. Of course these
_are_ my machines, and I know to be careful. On the other hand, DEC put
that grant priority plug-module on many Unibus boards, and that's taller
than an IC in a socket. And yes, they do get flipped out sometimes...
I recall another problem, someone had installed a socket in repairing a bipolar memory
array. We started to experience sporadic memory errors. Now in our
application,PDP11/45s running a flight simulator, some of the more performance-hungry
flights routines are mapped to the speedy bipolar region. When the board was swapped
around to a less 'intensive' area the problem went away. Someone eventually found
a
warning in one of the DEC manuals advising that using sockets might result in performance
degradation. I don't believe this would be a problem with non-fastbus memory.
The worst thing is that sometimes DIP switches get
flipped when boards
are inserted or removed. This one causes some _very_ hard-to-trace
Yes, we had similar experiences on fastbus mem arrays with that DIPack in the upper right
corner.
Nick