Resolved: Re: 11/34 sanity check

Mike Ross tmfdmike at
Sun Apr 26 17:50:51 CDT 2015

That's harsh, JS. Incorrect pin markings are not something that would
be anywhere near the top of my list, or anyone else's I suspect. One
does not casually reverse the installation of cables just to see if
maybe it will work!


On Mon, Apr 27, 2015 at 9:41 AM, js at <js at> wrote:
> On 4/26/2015 12:58 PM, Josh Dersch wrote:
>>> I've seen this, when the 20 pin cable from M7859 to the console panel
>>> is plugged in reversed.
>>> Don't trust the marked pin 1 wire: sometimes DEC manufacturing twisted
>>> the cables.
>>> hope this helps,
>>> Joerg
>> All LEDs "glowing dark"?
>> And sure enough, I flipped the cable around and things are much happier,
>> the front panel is completely responsive and the CPU and bus seem to be
>> working but I'll need to spend some more time with it to test stuff out.
>> That'll learn me to trust Pin-1 markings on DEC stuff :).
>> Thanks all for the suggestions, it's all been very educational...
>> - Josh
> J, to save the time of those posting, it's more or less assumed you've
> already tried the obvious things before asking for help.    Otherwise,
> posters are -- for example -- left having to first question whether a
> machine is even plugged in to the wall or not.
> - J

'No greater love hath a man than he lay down his life for his brother.
Not for millions, not for glory, not for fame.
For one person, in the dark, where no one will ever know or see.'

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