Changes

*[http://z80.info/interrup.htm Interrupt behaviour of the Z80 CPU]

*[https://github.com/hoglet67/Z80Decoder/wiki/Undocumented-Flags Behaviour of the undocumented flags]

*[https://baltazarstudios.com/zilog-z80-undocumented-behavior/ Complete list of Z80 instructions and their bus responses and cycles dumped from real hardware]

*[https://floooh.github.io/2021/12/06/z80-instruction-timing.html Detailed look at Z80 instruction timings with the help of a Z80 netlist simulation]