2026-07-03

Coffee GB v1.7.0

Coffee GB v1.7.0 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 1.7.0 is a major upgrade, bringing significant compatibility and performance improvements:
Full compatibility: All reported game bugs and compatibility issues have been fixed.
Accuracy: The emulator now passes the complete Blargg and Mooneye test suites.
Performance: Gameplay now runs at a rock-solid, stable 60 FPS.
This release also introduces a highly useful feature: you can now rewind gameplay at any time by pressing the Backspace key.
These changes were implemented by the new Claude Fable model. To ensure absolute accuracy for timings and internal hardware dependencies, the model utilized the original DMG schematics and the reference-grade SameBoy emulator as its sources of truth.

Download: Coffee GB v1.7.0
Source: Here

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