Could add one or more (reprograble?) FPGA's for extra? processing power OR reconfiguration ease to such a card ...... I've often wondered why such a card (wit

Could add one or more (reprograble?) FPGA's for extra? processing power OR reconfiguration ease to such a card ...... I've often wondered why such a card (with FPGA) is not available for retro? computer emulation or simulation ??