* [https://zxe.io/software/Z80/ libZ80] Ultra accurate ANSI C implementation
* [[arnold]] uses [[InkZ80]], written in C++ (apart from the author-designed C simulation)
* On OpenCores, there is also an ultra accurate [https://opencores.org/projects/a-z80 A-Z80] Ultra accurate Verilog implementation of the Z80].
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