> I get a 40 pin male .6" crimp header cable, the type that plugs into
> a 40 pin socket. I crimp a 40 wire flat ribbon cable on it. I crimp
> a 40 pin female IDC connector the other end.
>
> Looking at the top of this connector, where will pin 1 of the 40 pin
> socket line up?
>
> IDC connector        40 pin .6" header to DIP socket
>  ======                ===========
> | 1  2 |              | 1       40|
> | 3  4 |              | 2       39|
>
> etc.
>
> With the connectors available to me, I have found that pin 1 of the
> connector on the left mates with pin 40 on the right, so it looks
> like I have to reverse the connections on my artwork on the IDC
> connector.
>
> Am I getting closer to the explanation and the problem guys?
>

Crimp the connectors on opposite sides of the ribbon and #1... lines
up with #1... at least in the northern hemisphere...

Regards/Roger, in Bangkok
Roger N. Shane
Tel/Fax: +66 (2) 291-3826
 E-mail: roger@wnet.net.th
 Postal: P.O. Box 11-303
         Phrakhanong, Bangkok 10110
         Thailand