[jsolson]

You're not wrong, but PnP including the configuration basis for PCI which still sits at the config space layer of the latest and greatest PCIe. That's the piece I find so significant. I work with GPUs that mostly communicate over a proprietary C2C connection, but how does the OS find them? PCI enumeration.

[hypercube33]

IRQ conflict stuff still kinda haunts me.

[hyperman1]

I remember. You get a tiny little sliver of sound and then press reset.