EmulatorJS frontend 4.2.3, retained from the existing COSOM Chrono runtime.
Original: https://github.com/EmulatorJS/EmulatorJS/tree/v4.2.3
Package: https://registry.npmjs.org/@emulatorjs/emulatorjs/-/emulatorjs-4.2.3.tgz
Retained modifications: automatic CDN version check disabled; remote core fallback removed;
original sources concatenated into emulator.min.js; original CSS copied into emulator.min.css.
The frontend bytes are unchanged from that retained runtime.
Genesis Plus GX core archive retained byte-for-byte from COSOM Sol-Feace player.
Build report: 2025-06-14. Only the single-thread legacy/WebGL1 core is shipped/selected.
Core source: https://github.com/EmulatorJS/Genesis-Plus-GX
Upstream: https://github.com/ekeeke/Genesis-Plus-GX
The segaCD control-layout identifier is reused internally for the identical Genesis A/B/C
input labels in frontend 4.2.3; the actual cartridge runs in genesis_plus_gx without CD BIOS.
No SNES offsets, save detector, cheats or game-memory patches are used.