At 08:47 PM 8/12/98 +0200, you wrote:
>----
>:What I mean is connecting TRG_A to RIGHT inside the DB9 connector. A
>:simple
>:feedback loop. It doesn't require an extra wire in the cable.
>:The idea is that an MSX toggles TRG_A a couple of times and then reads
>:RIGHT to see if it reports exactly the same state (0/1). If it does, a
>:joystick network device is connected to that port.
>:These signals are also sent across the network, but if we make the
>:protocol
>:such that every transfer starts with a signal from TRG_B, this is not a
>:problem.
>----
>
>Since a non-connected computer won't give response, and a non-connected
>cable won't give a response either, this extra wire inside the connector
>isn't really nessacary. So why do this while it limits the possibilities?
>(a transfer can't start with TRG_A anymore). To cut everything short,
>this has no use.
Good point.
So we make detection a task of the protocol, not the hardware.
Bye,
Maarten
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