On Wed, 13 Aug 2003 at 01:55:34, Marcel Kilgus wrote:
(ref: <[EMAIL PROTECTED]>)
>
>Roy wood wrote:
>> As a general rule single devices on double headed cables should always
>> be plugged into the last connector. I have never had a satisfactory
>> explanation of this from anyone
>
>I'm far from being a hardware genius, but I guess that as the end of
>the cable is not terminated when there's no drive attached you get
>noise on the data lines due to reflections at the unused cable end.
>Nasta? :-)
I _know_ Nasta has a definitive answer, but yes, that is my
understanding exactly.
There is a similar problem on the QL network. There will always be two
unused network sockets and they should be automagically terminated (330R
I think). Unfortunately the crummy Sinclair sockets often don't. A 330R
soldered in a jack plug does the trick - and did for Phoebus earlier.
The 80 way cable adds a ground line between every signal line.
That was something else that Nasta suggested I did on a design that Lau
and I worked on for someone designing a reaction tester.
Not only did I never get paid by the b******r but I even wasted �60 on
the toothless small claims court.
There is absolutely nothing sensible one can do if the defendant simply
does not respond.
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