A Z80 : References

This design would not be possible without Ken Shirriff who reverse-engineered some major portions of Z80 from the picture of a die. These are the portions of the A-Z80 design that are based on his work:

The design was also guided by the following:

... and the wealth of information (start at http://www.z80.info), source code of various emulators and several existing Verilog FPGA implementations.