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The UKHA-ARCHIVE IS CEASING OPERATIONS 31 DEC 2024

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Re: [xAP] PC Port Question



> You can SEND onto the same port from multiple apps, because there's a
difference between Source Port and Destination Port.
>
> Two apps can both send to the same destination port, but have to have
different source ports to
>run at the same time.
>
> The Destination port is what we care about. For the moment, the source
port is irrelevant.
>

Of course. I'm being thick again ;-)

> AIUI, only one application can Listen on a given source port at any time.
I'd been thinking about this in terms of display apps over the last couple
of days, in particular how a Unix program might want to listen, and drive
several serial devices. In the end, I decided that, in practice, it meant
one listener program per PC (but that could, of course, drive multiple
serial devices with different config.)
>
> The complexity comes when control apps start to listen (in order to take
action) rather than just broadcast. This means one app per PC at the
moment... but I'm working on it ;-)
>

A seperate listner app?
This could then resend the xAP packet to other local ports that other
listeners on the pc could be configured to listen to?

Thanks for info, Mark.


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