Date   : Mon, 26 Mar 2007 08:06:36 +0100
From   : info@... (Sprow)
Subject: BBC IDE interfaces in stock again

In article <s1JoJhAIvzBGFw8$@jasper.org.uk>,
   Mike Tomlinson <mike@...> wrote:
> In article <070325032219@...>, Jonathan Graham Harston
> <jgh@...> writes
>
> >Yes, see http//mdfs.net/Info/Comp/BBC/IDE/16bit/patch.txt
>
> "1: 1MHz connector"
>
> "Not an error, but a warning. You must not use a right-angle IDC
> header for the 1MHz connector. You must use a straight connector
> with the notch on the side towards the edge of the board."
>
> What's the reason for this?

Infact you can by fitting it in the through connector holes (don't forget to
fit the bus terminating resistors!), but polarised right angled connectors
are usually bent the opposite way round to that which is required.

There are 5 solutions to this warning
 - use a non polarised box header
 - use a non polarised IDC female on the ribbon
 - pull the pins out with pliers and put them in the other way round
 - cut a second notch in the plastic
 - trawl the catalogues for reverse bend ones

Sprow.