27 Jan
2015
27 Jan
'15
7:10 p.m.
I just found and installed another m9312. That's the board that houses
the power-on diagnostics, right?
Assuming that's true, I may have a clue: the machine now halts with
177021 showing when I power it on. I can still enter 165200 via the front
panel and CNTRL-START it and it then behaves just like before, with the
corrupted numbers. Does that shed any light?
thx
jake
On Tue, Jan 27, 2015 at 10:00 PM, Jacob Ritorto <jacob.ritorto at gmail.com>
wrote:
I moved the console down a notch and replaced the (2)
11/34 board with the
(3) 11/34a boards. Got a lovely BUS ERROR, couldn't get control of panel
with CNTRL-HLT. So I put the original (2) 11/34 boards back in and it's
running as it was before. Ho Hum.
On Tue, Jan 27, 2015 at 9:20 PM, Jacob Ritorto <jacob.ritorto at gmail.com>
wrote:
Awesome, I'm just going to swap cpu boards
and try again, then. Never
hurts to have floating point, I guess (actually, in the pdp11 world, I bet
there are cases where it hurts :\ )
Thanks Noel!
On Tue, Jan 27, 2015 at 9:03 PM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:
From:
Johnny Billquist
Is noone paying attention to the fact (and my
previous comment)
about
using 0 for CSR and vector???
Err, no. :-)
But seriously, I'm a bit boggled that a diagnostic program would _not_
have
as default the 'standard' vector/address. So I'm kind of assuming that
the
0's are somehow bug results.
From: Jacob Ritorto
I grabbed a set of pdp11/34a boards ... Can I
plug them straight
into
this blackplane that's currently housing my
misbehaving 11/34?
Yes, if the backplane is some flavour of DD11-P (I don't know of any
backplane that supports the 11/34 but not the 11/34A, but I only have
direct
confirmatory documentation on the DD11-P, and it supports both).
My vague recollection is that one can use _either_ the M7265/M7266 (but
as
paired set) _or_ the M8265/M8266 set, but you can't mix and match them.
But
don't depend on that (I'm too tired to dig into this tonight, I'll do so
tomorrow).
Backplane markings are very faded but seem to say
dd11-pk.
Yeah, that's the 11/34 backplane (actually, the DD11-P part - the -PK is
the
version with the wire harness to work in a BA11-L or BA11-K; the -PF is
for
the BA11-F or BA11-P).
Noel