Date   : Sat, 03 Feb 2007 13:16:50 +0000
From   : joel@... (Joel Rowbottom)
Subject: PL1 on Acorn Teletext Adaptor Board

--On 03 February 2007 13:11 +0000 David Hunt <dm.hunt@...> wrote:

>> Anyone know what this was for please?
>
> Just a guess, looking at mine, that it could take a connector as a
> pass-through to allow a chain of devices. I've not seen a second socket or
> cable fitted to one, as such it has always had to sit on the end of the
> bus in my systems. I guess you'd have to disable the termination
> resistors if it wasn't the last device in the chain...

I wondered about that, but it's substantially longer than a 1MHz bus 
connector, or even a TUBE port.