19 Sep
1999
19 Sep
'99
1:39 p.m.
I assume that the board is mis-labelled or some mistake
has
been made, since I removed it from a working qbus system (an 11/73).
Is it possible to put a Unibus board in a qbus system, I know it
won't work, but will it physically fit into the backplane?
Yes, it will fit. If it was in there, well, then, maybe it really
is the Q-bus version. (Or my memory of TCU vs TCQ has faded...)
For that matter, Omnibus boards fit into Unibus and Q-bus backplanes too...
I had trouble setting the clock on this system, maybe
this is
the reason.
If the RT-11 "TIME" command isn't incrementing, that has nothing to
do with the TCU - it's an indication that the line time clock (60Hz
for us) interrupt is somehow disabled.
With the board in, does it respond at its standard addresses of
160770 - 160776? If so, then it's installed in the right sort
of system.
You ought to see the value at 160774 incrementing once per second
if the clock is indeed ticking.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
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