On Dec 12, 2017 3:41 AM, "Mattis Lind via cctech"
wrote:
>
> There has been plenty of good suggestions already.
>
> If I were you I would:
>
> 1. Check voltages from the PSU as mentioned previously.
> 2. Check AC LO / DC LO signals as Bill mentioned.
> 3. Strip out every card on the bus except of
There has been plenty of good suggestions already.
If I were you I would:
1. Check voltages from the PSU as mentioned previously.
2. Check AC LO / DC LO signals as Bill mentioned.
3. Strip out every card on the bus except of the terminator boards and the
M7859 programmers console.
4. Put the cons
> >>
> >> Any suggestions as to what to try first? I may have the bus grant in
backwards. I have other boards I can try.
> >>
For an 11/34A can one test for DC LO / AC LO? If so and you don't get the
correct reading that's a show stopper right there. Remove all but the
essential cards, termina
Ray Fantini knows the 11/34 very well
https://www.youtube.com/watch?v=pU8DOKVxDJ8
He helped me with UNIBUS diagnosis.
I am sure you have seen this:
http://bitsavers.org/pdf/dec/pdp11/1134/
I would definitely start with the power supply and work my way through the
voltage regulators, etc. If you
> From: Henk Gooijen
> the M7859 is sort of a UNIBUS device. The (front panel) console only
> communicates with the M7859.
Not quite; it does _mostly_ 'do its thing' over the UNIBUS, but there are
also two special lines carried across the DD11-P backplane to the CPU, 'Halt
Request' an
I am reviving an 11/34. Cards are:
Back/Fans [M8266] Front of machine where keypad is.
[M8265]
[M9312] [M7859]
[M7762]
[OPEN] [M7860]
[M7840]
Bus grant in third from front slot
[M9302] [
I also have an 11/04 that I went and drug out. It is configured like this:
11/04:
AAA BBB CCC DDD EEE FFF
(Rear/Fans/Power Supply) 1 [M7263] (Front/Keypad/DC ON)
2 [M7847] ...
. If that is not the
case, there is definitely something wrong.
Van: cctech namens John Welch via cctech
Verzonden: Saturday, December 9, 2017 12:49:01 AM
Aan: Jerry Weiss; cct...@classiccmp.org
Onderwerp: Re: Revive 11/34
I also have an 11/04 that I went and drug out. It is configured like
) on. If that is not the
case, there is definitely something wrong.
Van: cctech namens John Welch via cctech
Verzonden: Saturday, December 9, 2017 12:49:01 AM
Aan: Jerry Weiss; cct...@classiccmp.org
Onderwerp: Re: Revive 11/34
I also have an 11/04 that I went
> Aan: cct...@classiccmp.org
> Onderwerp: Revive 11/34
>
>
>
> I am reviving an 11/34. Cards are:
>
> Back/Fans [M8266] Front of machine where keypad is.
>
> [M8265]
>
> [M9312] [M7859]
>
>
> On Dec 9, 2017, at 8:23 AM, Noel Chiappa via cctalk
> wrote:
>
>
>> From: Jerry Weiss
>
> And the same for Jerry...
>
>> It won't seat evenly if reversed. At least that is what my scraped
>> knuckles remember.
>
> Nope, they go in quite fine the wrong way around; I just checked.
>
> Mak
, 2017 5:15:18 PM
Aan: cctalk@classiccmp.org
CC: j...@mercury.lcs.mit.edu
Onderwerp: Re: Revive 11/34
> From: John Welch
> Can you give me a refresher on how to tell which slots are cut? I
> remember having to turn the chassis over and looking for a particular
> wire
Yeah;
> From: John Welch
> Can you give me a refresher on how to tell which slots are cut? I
> remember having to turn the chassis over and looking for a particular
> wire
Yeah; you can use the G7273 as a 'crib', since it has the NPG jumper on it.
That jumper goes from CA1 to CB1: comp
> From: Henk Gooijen
A few comments to you about Henk's points:
> Standing in front of the 11/34 processor box (looking at the console),
> slot number 1 is at the right side.
That's for the 10-1/2" box; the 5-1/4" is different. Which is this?
> Each slot has 6 positions. Positio
> From: John Welch
> Any suggestions as to what to try first?
I would _definitely_ start by pulling _all_ the cards you can, to get down to
the simplest possible configuration. Once that works, start adding things
back in, one at a time.
If that configuration doesn't work, first try the
> On 12/8/2017 3:50 PM, Jerry Weiss wrote:
>> On Dec 8, 2017, at 2:25 PM, John Welch via cctech
>> wrote:
>>
>>> I am reviving an 11/34. Cards are:
>>>
>>> Back/Fans [M8266] Front of machine where keypad is.
>>> [M8265]
>>> [M9312] [M7859]
>>> [M77
On Dec 8, 2017, at 2:25 PM, John Welch via cctech wrote:
>
> I am reviving an 11/34. Cards are:
>
> Back/Fans [M8266] Front of machine where keypad is.
>
> [M8265]
>
> [M9312] [M7859]
>
> [M7762]
>
> [OPEN] [M7860]
>
>
Van: John Welch via cctech<mailto:cct...@classiccmp.org>
Verzonden: vrijdag 8 december 2017 21:25
Aan: cct...@classiccmp.org<mailto:cct...@classiccmp.org>
Onderwerp: Revive 11/34
I am reviving an 11/34. Cards are:
Back/Fans [M8266] Front of machine where keypad is.
18 matches
Mail list logo
