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by BearOso 859 days ago
It doesn't implement the original hardware. It's not copy of the original chip. Reverse engineering is used to get the behavior of the hardware. They reproduce the inputs and outputs with Verilog and write it to an FPGA.

If it weren't emulation, they would decap the original chip and directly copy the chip, gate-by-gate. It could be done, but it hasn't been done that way anywhere to date.