Those do exist, e.g. the Vortex86 SoC[1] comes to mind. Not sure if the AMD Geode GX/LX series[2] counts, since they IIRC have an external support chip. Some y

Those do exist, e.g. the Vortex86 SoC[1] comes to mind. Not sure if the AMD Geode GX/LX series[2] counts, since they IIRC have an external support chip. Some years back I used to work with router boards and industrial PCs that used them. I still have an industrial PC sitting on a shelf with an Eurocard[3] sized SBC and the ISA bus connected to a DIN41612[4] back plane. The Geode implement a large subset of the i586 ISA tough (the LX also have an AES extension), but some other instructions are missing. I'm also not sure if they still make them any more, but given how many industrial products they're in, I'd bet there are warehouses full of them somewhere, until the last support contract expires. [1] https://en.wikipedia.org/wiki/Vortex86 https://en.wikipedia.org/wiki/Vortex86 [2] https://en.wikipedia.org/wiki/AMD_Geode#Geode_LX https://en.wikipedia.org/wiki/AMD_Geode#Geode_LX [3] https://en.wikipedia.org/wiki/Eurocard_(printed_circuit_board) https://en.wikipedia.org/wiki/Eurocard_(printed_circuit_boar... [4] https://de.wikipedia.org/wiki/Datei:DIN41612-c-federleiste-c2-messerleiste.PNG https://de.wikipedia.org/wiki/Datei:DIN41612-c-federleiste-c...