26 Apr
2015
26 Apr
'15
4:22 p.m.
I've seen it done in numerous DEC options. I usually doesn't hurt anything.
Some I check for them, but it depends on what I know about the history of
the gear.
If you don't work on PDP11s every day it would be easy to overlook.
The easiest one to find is the fault light flashes on RL drives.
On Sun, Apr 26, 2015 at 6:08 PM, js at cimmeri.com <js at cimmeri.com> wrote:
They are on mine!! That's the first thing I check! DUHH!
On 4/26/2015 5:50 PM, Mike Ross wrote:
> 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!
>
> Mike
>
> On Mon, Apr 27, 2015 at 9:41 AM, js at cimmeri.com<js at cimmeri.com> 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
>>
>
>
>