There's an FPGA soft core called nextz80 that's supposed to do 4x more per clock cycle than a normal z80.
"Works at up to 40MHZ on Spartan XC3S700AN speed grade -4) - performances similar or better than a real Z80 running at 160Mhz."
https://opencores.org/projects/nextz80
There's an FPGA soft core called nextz80 that's supposed to do 4x more per clock cycle than a normal z80.
"Works at up to 40MHZ on Spartan XC3S700AN speed grade -4) - performances similar or better than a real Z80 running at 160Mhz."
https://opencores.org/projects/nextz80