If it's all digital logic, you can do this now with FPGAs. Modern ones would have no trouble implementing something like a 68030, and the tools can synthesize i

If it's all digital logic, you can do this now with FPGAs. Modern ones would have no trouble implementing something like a 68030, and the tools can synthesize it from Verilog. The great thing about FPGAs is that if you have a bug (which never happens to me, but I hear it happens to other people) you can fix it and recompile in minutes.