quick omnibus question

[Brent Hilpert]

The two presentations look to be consistent to me, right down to the keyways.

The bitsavers/hack42 view is oriented is as if you held a board vertically with the connectors edge pointing towards you and the components on your right, the two faces are then folded out towards you.
The connectors go up A to D.
This view would also be a view from the bottom of the backplane.

The  8e/Docs 2-page extract is 180 degrees rotated from this.
So the connectors now go down A to D.


On 2017-Jan-22, at 3:15 PM, W2HX wrote:

> Before deleting this, someone much smarter than me should double check to make sure I am right that the file is incorrect. It is a shame because it is very nicely done. It even shows the keyways in the card. But it seems to be backward to me.
> 
> I tried to find contact information for that hack42.nl site to suggest they redo the otherwise useful file, but was not successful.
> Thank you
> Eugene
> 
> 
> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Al Kossow
> Sent: Sunday, January 22, 2017 5:59 PM
> To: cctalk at classiccmp.org
> Subject: Re: quick omnibus question
> 
> 
> 
> On 1/22/17 2:05 PM, W2HX wrote:
> 
>> I hope this email can be found by the next guy searching for the omnibus details so they can avoid wasting time.
>> THIS FILE IS WRONG
>> http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp8/pdp8e/Omnibu
>> s_legenda.pdf
>> 
>> This file shows the Omnibus signal locations CORRECTLY (extracted from 
>> a larger document) 
>> http://w2hx.com/x/VintageComp/PDP-8e/Docs/Omnibus_Card_Edge_Designatio
>> ns.pdf
>> 
>> 
>> 
>> 
> 
> 
> i will delete the file
> here is the original source
> http://www.classiccmp.org/pipermail/cctalk/2015-June/007475.html
>