Comment on ao486: x86-compatible Verilog core implementing all features of a 486 SX (2014)Comments−allenrb1moCurious: are these cores (ao486, z386) technically illegal because of Intel/AMD licensing/copyright/etc? Or has everything relevant expired? Surely the patents have but not sure what else comes into play.−anthk28dNo more than any X86 emulator since forever.−varispeed1moYou can't copyright an API (ISA) or schematics (as in the wiring).−wmf1moMaybe the microcode is copyrighted.
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Curious: are these cores (ao486, z386) technically illegal because of Intel/AMD licensing/copyright/etc? Or has everything relevant expired? Surely the patents have but not sure what else comes into play.
No more than any X86 emulator since forever.
You can't copyright an API (ISA) or schematics (as in the wiring).
Maybe the microcode is copyrighted.