20 Nov
2014
20 Nov
'14
11:32 a.m.
From: Ben Sinclair
It doesn't seem to work on mine, so maybe I am
having an interrupt
problem on the DLV11!
Definitely an interrupt problem of some kind! But this is a big step; knowing
we have a specific problem, we can try and track it to its lair.
I have V6 jumpered, V7 jumpered, and V5 on X to 0.
According to the
manual, that's the factory setting. Is that how you have yours setup?
Yes.
So the first question is 'do you have a spare DLV11-J you can swap in'? I'm
assuming the answer is 'no'. :-) Where are you located?
Noel
20 Nov
20 Nov
11:38 a.m.
I'm in Iowa, and unfortunately I don't any spares! I'll check eBay in a bit
and see if there are any good ones up there right now. They seem to come up
pretty frequently!
On Thu, Nov 20, 2014 at 10:32 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:
--
Ben Sinclair
ben at bensinclair.com
From: Ben
Sinclair
It doesn't seem to work on mine, so maybe I
am having an interrupt
problem on the DLV11!
Definitely an interrupt problem of some kind! But this is a big step;
knowing
we have a specific problem, we can try and track it to its lair.
I have V6 jumpered, V7 jumpered, and V5 on X to
0. According to the
manual, that's the factory setting. Is that how you have yours setup?
Yes.
So the first question is 'do you have a spare DLV11-J you can swap in'? I'm
assuming the answer is 'no'. :-) Where are you located?
Noel
11:48 a.m.
I did find a Sigma brand M8043 equivalent on eBay for a decent price (via a
make best offer). Is using non-DEC hardware just adding more variables, or
are they generally okay? I do like that it has dip switches rather than
wire wrapped jumpers!
On Thu, Nov 20, 2014 at 10:38 AM, Ben Sinclair <bensinc at gmail.com> wrote:
I'm in Iowa, and unfortunately I don't any
spares! I'll check eBay in a
bit and see if there are any good ones up there right now. They seem to
come up pretty frequently!
On Thu, Nov 20, 2014 at 10:32 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:
--
Ben Sinclair
ben at bensinclair.com
--
Ben Sinclair
ben at bensinclair.com
From: Ben
Sinclair
It doesn't seem to work on mine, so maybe I
am having an interrupt
problem on the DLV11!
Definitely an interrupt problem of some kind! But this is a big step;
knowing
we have a specific problem, we can try and track it to its lair.
I have V6 jumpered, V7 jumpered, and V5 on X to
0. According to the
manual, that's the factory setting. Is that how you have yours
setup?
Yes.
So the first question is 'do you have a spare DLV11-J you can swap in'?
I'm
assuming the answer is 'no'. :-) Where are you located?
Noel
12:02 p.m.
On Nov 20, 2014, at 10:48 AM, Ben Sinclair <bensinc
at gmail.com> wrote:
I did find a Sigma brand M8043 equivalent on eBay for a decent price (via a
make best offer). Is using non-DEC hardware just adding more variables, or
are they generally okay? I do like that it has dip switches rather than
wire wrapped jumpers!
I've used sigma lookalikes many times, and _never_ had a problem, including booting
emulated TU58 from the port at 776500. Sigma had a very good rep back in the day, along
with emulex and (later) CMD.
I also approve of the dipswitches :-)
2:26 p.m.
----- Original Message -----
From: "Ben Sinclair" <bensinc at
gmail.com>
Subject: Re: PDP-11/23 Debugging
I did find a Sigma brand M8043 equivalent on eBay for a decent price (via a
make best offer). Is using non-DEC hardware just adding more variables, or
are they generally okay? I do like that it has dip switches rather than
wire wrapped jumpers!
Sigma's are just as good as DEC boards... I have one in a system with no problems.
If it's the board that 'efi' is selling, here's a link to the manual
http://bitsavers.trailing-edge.com/pdf/sigmaInformationSystems/400200B_SCD-…
FWIW, the board that I have in my system was purchased from him...
cheers
alex
2:15 p.m.
I don't have one, though I'm looking into getting one to help with a 6502
home-brew project.
On Thu, Nov 20, 2014 at 1:05 PM, tony duell <ard at p850ug1.demon.co.uk> wrote:
--
Ben Sinclair
ben at bensinclair.com
So the first question is 'do you have a spare DLV11-J you can swap in'?
I'm
assuming the answer is 'no'. :-) Where
are you located?
Err, isn't the first question 'Do you have a logic analyser?' I am quite
sure the DLV11-J
printset is available.
-tony 
2:28 p.m.
[Logic analyser]
I don't have one, though I'm looking into
getting one to help with a 6502
home-brew project.
Do you have a simple logic probe? If you disable the LTC interrupt for the moment then the
console
port should be the only thing generating interrupts. You can see if it is asserting bus
request, if the
grant is getting back to it, if it's then trying to do an interrupt cycle, etc
-tony
3506
days inactive
3506
days old
7 comments
5 participants
participants (5)
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ard＠p850ug1.demon.co.uk -
azd30＠telus.net -
bensinc＠gmail.com -
jnc＠mercury.lcs.mit.edu -
roeapeterson＠gmail.com