{"slug": "sonic-cd-mega-cd-little-planet-sonic-cd-recompiled-from-a-matching-disassembly", "title": "Sonic CD (Mega-CD): Little Planet: Sonic CD recompiled from a matching disassembly", "summary": "A project called Little Planet has recompiled Sonic CD from a byte-identical disassembly of the Mega-CD game, using a static recompiler to translate 68000 assembly into C, with commit metadata crediting \"Co-Authored-By: Claude Opus 5.5\" and \"Co-Authored-By: Claude Sonnet 5.5\" as co-authors on tasks including audio driver handling and widescreen menu adjustments. The port implements Mega-CD hardware — 68000 CPUs, Z80, VDP and audio chips — via high-level emulation replacing the original BIOS, and adds True16:9 widescreen, a 4K 60 fps remastered opening and CRT filters. The README names the Japanese release (G-6021, SHA-1 5b0ac16233028bcd8691c71b0a749b8d485dae7c) as the primary tested version, requires users to supply their own disc image, and reports no independent confirmation of the result.", "body_md": "## Evidence at a glance\n\nBased on the linked sources. The author's reported result and independent confirmation are separate checks.\n\n- AI involvement\n- Reported models: Claude. Tools: SDL3, FFmpeg, Python 3. The writeup below describes the work attributed to AI.\n- Reported result\n- Works. This is the directory's source-based outcome classification.\n- Independent confirmation\n- Not reported.\n- Human work and limitations\n- The project uses a static recompiler to turn 68000 assembly into C. The commit logs explicitly credit AI models as co-authors for specific implementation tasks, such as audio driver handling and widescreen menu adjustments.\n\n### Original sources\n\n## What was done\n\nLittle Planet is a Sonic CD port built from a byte-identical disassembly and static recompiler. It features True16:9 widescreen, a remastered opening, and high-level HLE implementation of Mega-CD hardware, requiring a user-provided disc image.\n\nLittle Planet is a Sonic CD recompilation project that provides a disassembly of the game's code, which reassembles byte-identical to the original disc. A static recompiler translates this code into C, which is then executed and verified frame-by-frame against an interpreter. The project implements the Mega-CD hardware, including the 68000 CPUs, Z80, VDP, and audio chips, using a high-level implementation (HLE) to replace the original BIOS. The README documents that the Japanese release (G-6021, SHA-1 5b0ac16233028bcd8691c71b0a749b8d485dae7c) is the primary tested version, while others may boot but remain untested. Development commits in the project repository include the strings 'Co-Authored-By: Claude Opus 5.5 [\\[email protected\\]](https://reversedwithai.com/cdn-cgi/l/email-protection#6f01001d0a1f03162f0e011b071d001f060c410c0002)' and 'Co-Authored-By: Claude Sonnet 5.5 [\\[email protected\\]](https://reversedwithai.com/cdn-cgi/l/email-protection#4c22233e293c20350c2d2238243e233c252f622f2321)' in their metadata. The port supports True16:9 widescreen, a 4K 60 fps remastered opening, and various CRT filters. Users must provide their own disc image, as no game data is included. The project is available at [https://raw.githubusercontent.com/carlosrmz009/littleplanet/HEAD/README.md](https://raw.githubusercontent.com/carlosrmz009/littleplanet/HEAD/README.md).\n\n## Reproduce it\n\n```\nBuild the project using the provided scripts (build_linux.sh, build_mac.sh, or build.bat) and run the resulting binary with a path to a valid Sonic CD disc image (e.g., ./build/littleplanet path/to/sonic.cue).\n```\n\n", "url": "https://wpnews.pro/news/sonic-cd-mega-cd-little-planet-sonic-cd-recompiled-from-a-matching-disassembly", "canonical_source": "https://reversedwithai.com/p/sonic-cd-mega-cd-1ee8d044", "published_at": "2026-10-23 06:46:11+00:00", "updated_at": "2026-10-23 07:41:34.701562+00:00", "lang": "en", "topics": ["artificial-intelligence"], "entities": ["Little Planet", "Sonic CD", "Mega-CD", "Claude", "Claude Sonnet 5.5", "SDL3", "FFmpeg", "Python 3"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/sonic-cd-mega-cd-little-planet-sonic-cd-recompiled-from-a-matching-disassembly", "markdown": "https://wpnews.pro/news/sonic-cd-mega-cd-little-planet-sonic-cd-recompiled-from-a-matching-disassembly.md", "text": "https://wpnews.pro/news/sonic-cd-mega-cd-little-planet-sonic-cd-recompiled-from-a-matching-disassembly.txt", "jsonld": "https://wpnews.pro/news/sonic-cd-mega-cd-little-planet-sonic-cd-recompiled-from-a-matching-disassembly.jsonld"}}