ZXGATE's ACE implementaion was written to match the original as closely as possible. Part from some changes made to make the design fully synchronous the VHDL source code is very close to the original schematics. The only addition is a PS/2 keyboard interface. It has been tested successfully on a BurchED B5-SPARTAN2+ FPGA development board using Leonardo Spectrum synthesis. Requires external RAM.
Download and synthesize it in the same way as for ZX01 but use the module name "ace" instead of "zx".