A computer without TPM, a "management engine", an Ethernet card with real Firmware in a real ROM, no platform controller, nothing.
...and a completely open BIOS w/o any binary blobs, and UEFI layer.
Almost a 486DX, almost.
> an Ethernet card with real Firmware in a real ROM, no platform controller, nothing. ...and a completely open BIOS w/o any binary blobs
None of which I was talking about. But I am pretty sure that with any motherboard, you can disable onboard Ethernet and install whatever adapter you want instead.