Coffee GB v2.0.7 is released. Coffee GB is a Gameboy Color emulator written in Java 16 (core) and Kotlin (UI). It's meant to be a development exercise.

Features:
Full support for GB & GBC emulation.
Partial Super Gameboy emulation (borders and palette).
Cycle-exact CPU emulation. Each opcode is split into a few micro-operations (load value from memory, store it to register, etc.) and each micro-operation is run in a separate CPU cycle.
Quite compatible (all the Blargg's tests are passed, although some game still doesn't work)
Rollback-based netplay
MBC1-5 support
Battery saves
Support for zipped ROMs
ROM-based compatibility tests run from Maven

Coffee GB Changelog:
Coffee GB 2.0.7 replaces five ROM-specific multiplayer instruction overlays with deterministic shared link-role election logic. Revenge of the Gator, Shikinjou, Volley Fire, Harvest Moon GB, and Ikari no Yousai 2 now connect using their original ROM bytes. The scheduler makes the same decision during live execution and rollback replay, while ordinary two-player links and Jantaku Boy's four-player adapter behavior remain intact.
This release also preserves the Java-facing presentation-suppression API and deprecated cartridge compatibility entry points, and stabilizes native-package validation against a PID-marker publication race.
Multiplayer compatibility evidence
Harvest Moon GB remains connected after replacing its ROM-specific workaround with the generic link scheduler (PR #617; original regression report #581).
Merged pull requests
#617 Resolve mirrored link role elections generically, by @trekawek
#619 Publish interruption-test PID marker atomically, by @trekawek
Fixed issues
None.
Native package signing evidence
linux-x86-64: unsigned
windows-x86-64: unsigned
macos-x86-64: unsigned
macos-aarch64: unsigned
Known platform limitations
On macOS, game controllers require a compatible system SDL2 installation; keyboard input and emulation remain usable without it.

Download: Coffee GB v2.0.7
Source: Here