It was developed on Mac OSX and should compile with only tiny tweaks on Linux as well. The example system is written in C++ and uses the Qt framework and POSIX calls. The core is plain C and could be back-ported to C easily.

It can be heavily customized by replacing the provided standard macros with own definitions. :-) You can add a lot of complications until you hit the clock speed of a real system, though. But will degrade with every complication added. 1Hz/12Hz (250 MHz on a 3 GHz Intel 64 bit CPU). Exact emulation of LDIR and similar opcodes, e.g.In mode 0 the CPU can read a RST opcode or a CALL opcode with 2 subsequent address bytes. Maybe some other emulations are more precise, but in essence more effort only results in more exactly crashing programs. Flag register: some undefined flag bit modifications are not handled perfectly.Wait states may be added in modified macro definitions. The core can be restricted to emulate a 8080 CPU instead.I may add support if there is actual request. Note: some illegal opcodes behave differently on some brands of Z80 CPUs, most notably on CMOS versions. The emulation handles most aspects of the Z80 CPU exactly:

Source of the Z80 emulation, the Z80 system and the system's Rom is available for download at the end of this page. This page describes my Z80 emulation soft core and a simple emulated Z80 system which uses it. Z80 EMUF – Z80 Emulation Core and Example System

Download z 80 cpu