Coffee GB Version 2.0.4

Coffee GB v2.0.4, a Gameboy Color emulator developed in Java and Kotlin, now includes full GB and GBC support, partial Super Gameboy emulation, and cycle-exact CPU emulation. The update enhances on-screen menus and save-state feedback, restores Windows MSI packaging, and improves the Super Color 26-in-1 multicart selection protocol. Native packages were validated for various operating systems, including Linux and macOS. Key features added include rollback-based netplay, battery saves, zipped ROM support, and compatibility tests. Notable fixes include support for gamepads and UI enhancements. MacOS users need a compatible SDL2 setup for game controller functionality.

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Coffee GB v2.0.4 has been released. Coffee GB is a Gameboy Color emulator developed in Java 16 (core) and Kotlin (UI) as a learning project.

Features:
Comprehensive GB & GBC emulation support.
Partial Super Gameboy emulation (borders and palettes).
Cycle-accurate CPU emulation: each opcode is divided into several micro-operations (like loading values from memory, storing them to registers, etc.), with each micro-operation executed in a separate CPU cycle.
Highly compatible (passes all of Blargg’s tests, though some games may still not function).
Rollback-based netplay.
Support for MBC1-5.
Battery save functionality.
Zipped ROMs support.
ROM compatibility tests conducted via Maven.

Coffee GB Changelog:
Summary:
Version 2.0.4 enhances on-screen menus and save-state feedback, reinstates Windows MSI packaging, advances the evidence-based DMG signal model, and corrects the Super Color 26-in-1 multicart selection method. Native packages and the executable JAR have been verified for Linux x86-64, Windows x86-64, macOS x86-64, and macOS ARM64.
Merged pull requests:
#535 — Show save-state timestamps and feedback (@trekawek)
#536 — Stabilize persistence close tests (@trekawek)
#537 — Restore Windows MSI installer (@trekawek)
#539 — Develop evidence-backed signal core reductions (@trekawek)
#540 — Map DMG schematics to Coffee GB and correct bounded behavior (@trekawek)
#541 — Utilize ByteBounce for on-screen menu UI (@trekawek)
#542 — Enhance on-screen pause and state menus (@trekawek)
#543 — Address Windows gamepad RawInput polling issue (@trekawek)
#544 — Fix Super Color 26-in-1 multicart protocol (@trekawek)
#545 — Introduce scrolling for on-screen menu rails (@trekawek)
Fixed issues:
#538 — Super Color 26-in-1 menu entries that displayed a white screen or launched incorrect games now lead to their intended titles.
Platform note:
On macOS, game controllers require a compatible SDL2 installation; keyboard input and emulation will still function without it.