Does anyone know of a SBC with only USB 2.0 and SD ports. Preferably with Ethernet over USB. If not, does anybody know of a good processor to start with?
Did you look at Olimex product pages? Are there none that suit you & if not why not?
John
There is https://www.olimex.com/Products/OLinuXino/iMX233/iMX233-OLinuXino-NANO/open-source-hardware (https://www.olimex.com/Products/OLinuXino/iMX233/iMX233-OLinuXino-NANO/open-source-hardware). Not spectacularly powerful, but since you didn't elaborate on your specific use case, this seems to meet the minimum requirements that you have named.