12 Jun
2009
12 Jun
'09
9:31 p.m.
On 11/06/2009 13:33, Johnny Billquist wrote:
Josh Dersch <derschjo at mail.msu.edu> wrote:
So I moved it
out of the 9th slot on the processor backplane and into
the first slot on Unibus backplane. (And put a grant card in the 9th
slot...) And hey, it works. Toggled in a short "echo" program and
what I type on the terminal keyboard is echoed back, at a blistering
300 baud.
Excellent!
> So... clearly there's something wrong with the SPC slot on the
> processor backplane. A couple more questions: Are you *sure* slot 9 in the processor backplane
really is a Unibus
slot??? More correctly stated: the unibus out in the backplane A and B
don't neccesarily imply that C-F is a Unibus SPC slot.
I haven't checked the 11/40 drawings or manuals, and I assume you have
been reading them some. Please check this.
It's a big mistake to just assume that one slot is like another...
It is, and it's the normal place for the console. My current PDP-11/40
has an M7800-YA (DL-11) in there, as did the 11/40 I used to have.
--
Pete Peter Turnbull
Network Manager
University of York