What's changed
- Expand performance-mode batching across CPU, PPU, DMA, memory access, and peripherals, with additional state/replay regression coverage, diagnostics, and Android performance tooling.
- Fix simultaneous 2P connections in Mach Go Go Go when the machines' timing phases differ. Each player still needs a saved car: complete a solo race and choose きろくする (Record) before entering 2P Battle.
- Prevent competing Coffee GB processes sharing a Saves directory from freezing the host during netplay autosave handoff. All instances sharing Saves should use the updated version.
- Restore GBVisualizer audio when skipping the boot ROM and initialize deterministic post-boot CPU, audio, palette, joypad, and DMA register defaults. Refresh state and replay baselines for these defaults; older SKIP boot-reference recordings may report divergence.
Merged pull requests
- #668: Expand performance-mode batching and regression coverage — @trekawek.
- #670: Fix simultaneous 2P connection in Mach Go Go Go — @trekawek.
- #671: Prevent autosave races from freezing netplay connections — @trekawek.
- #669: Initialize skipped-boot registers and fix GBVisualizer audio — @trekawek.
Fixed issues
- #665: Fix the connection-time host freeze caused by shared-save autosave races, reported with Master Karateka.
- #666: Fix Mach Go Go Go's simultaneous 2P connection failure.
- #667: Restore missing GBVisualizer music with skipped boot.
Mach Go Go Go reaches course selection after the connection fix (#666).
Known platform limitations
On macOS, game controllers require a compatible system SDL2 installation; keyboard input and emulation remain usable without it.
Full changelog: coffee-gb-2.1.3...coffee-gb-2.1.4