Z80Core: a Z80 core written in Java.

This core is a slightly modified core extracted from JSpeccy, ready to be used in any emulator that needs a Z80 CPU.

This library emulates the full Z80 CPU instruction set, including:

• Undocumented instructions such as SLL.

• Undocumented flags 3 & 5 from F register.

• Hidden register MEMPTR (known as WZ in official Zilog documentation).

• Strict execution order for every instruction.

• Precise timing for all instructions, totally decoupled from the core.

An example that executes the CP/M v2.2 tests ZEXALL & ZEXDOC is included as a use case.

Compile the standard Java test application with:

mvn clean install

Run with:

./exerciser/target/z80exerciser.jar

Note	You’ll need graalvm to compile the native version of the application

Compile the native Java test application with:

mvn clean install -Pnative

Run with:

./exerciser/target/z80exerciser

Z80Core profiling with YourKit

Z80Core has been profiled using Yourkit.
YourKit is kindly supporting open source projects with its full-featured Java Profiler.

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