I know what a 80 wire 40 pin IDE cable is. Still didnt answer my question or do you just like making things up!
(show me somewhere where it ever says 40X2)
The extra 40 wires don't carry new information, they are just used to separate the "real" 40 signal wires, to reduce interference and other signaling problems associated with higher-speed transfers. So the 40 extra conductors are connected to ground, interspersed between the original 40 conductors of the old cable. Any stray signals that would "cross-talk" between adjacent wires on the 40-conductor cable are "absorbed" by these extra ground wires, improving signal integrity. The extra ground wires can be either all of the even-numbered wires, or all of the odd-numbered wires in the cable.
(show me somewhere where it ever says 40X2)
The extra 40 wires don't carry new information, they are just used to separate the "real" 40 signal wires, to reduce interference and other signaling problems associated with higher-speed transfers. So the 40 extra conductors are connected to ground, interspersed between the original 40 conductors of the old cable. Any stray signals that would "cross-talk" between adjacent wires on the 40-conductor cable are "absorbed" by these extra ground wires, improving signal integrity. The extra ground wires can be either all of the even-numbered wires, or all of the odd-numbered wires in the cable.
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