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Making a Linux-managed network switch
Sometimes the custom 5-port gigabit switch _is_ the solution.
The implementation for the chip initially looked very complicated, there's about 7 different power nets it requires and there are several pretty badly documented communication interfaces. So I decided to open up a switch to check how many of these coupling capacitors and impedance matching planes are actually used in a real design. It's not really possible to use this system on regular computers/servers since you need device trees to configure the kernel for this and most computers don't have kernel-controlled GPIO pins available to hook up a switch.
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