ARM or x86 with FPGA emulator

[WolfToTheMoon]

http://riscv.org/

http://www.lowrisc.org/

  lowRISC is producing fully open hardware systems. From the processor core   to the development board, our goal is to create a completely open computing   eco-system.  
      Our open-source SoC (System-on-a-Chip)   designs will be based on the 64-bit RISC-V instruction   set architecture. Volume silicon manufacture is planned   as is a low-cost development board