It depends on the size. Big FPGA's are amongst the most expensive chips that you can buy ($10K and up), but small ones are affordable. The amount of logic in an 80's era game computer should be within the gate budget of a small to mid sized FPGA.

See http://www.fpgaarcade.com/ for many examples of this.

Back in '01 (the good old days), we had volume prices of $40 for Xilinx parts which were big enough to get a PowerPC CPU in it.

What were you building?

Surface to air missiles!

Holy crap :)

Remind me to stay on your good side. I suddenly realized there may be bad consequences to 'checking in', such as punching out.

Well for small sized dev boards you can usually find them for about $100-$150. What I don't know is if this would have enough capability to do anything like this with it. I'd imagine the 6502 would be doable, but i don't know about the snes.

The DE0 Nano dev board is $86 on digikey.