There is quite interesting board with 400k Spartan FPGA designed to be Amiga hardware emulator

http://www.ebay.co.uk/itm/MiniMig-FPGA-Motherboard-Amiga-500-600-Emulator-/160808157843#ht_4215wt_840

I guess my endgame for when ASICalypse comes will be staying with capable retro gaming machine and having it halfpriced thanks to bitcoins


How much hashing power could I squeeze from XC3S400-4PQ208C?
Will 2Mb of onboard memory will be sufficient?
Do I just dump core with hardcoded input data through JTAG?
Is there any streamlined process to prepare cores, preferably with FPGA chips to preselect from?


Thanks