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emulator: Sonic CD Decompilation
type: standalone
core_classification: game_engine
source: "https://github.com/RSDKModding/RSDKv3-Decompilation"
upstream: "https://github.com/RSDKModding/RSDKv3-Decompilation"
source_commit: "a99e16ad15f4f824c1b9f96a61b3f8576ab648e2"
profiled_date: "2026-10-04"
display_name: "Sonic CD (RSDKv3 Decomp)"
cores: []
systems: [soniccd]
notes: |
Retro Engine v3 decompilation of Sonic CD (2011 Christian Whitehead
mobile/Steam port). Single binary; one data pack per install.
CheckRSDKFile only fopen()s the pack; there is no signature test. If
the file is absent the engine falls back to a loose Data/ tree. When
GameConfig.bin cannot be loaded either way it writes usage.txt
describing the layout it wants.
ref: RSDKv3/Reader.cpp:26-87 (CheckRSDKFile), RSDKv3/RetroEngine.cpp:283-321,
RSDKv3/RetroEngine.cpp:329-366
settings.ini key Dev:DataFile overrides the default "Data.rsdk".
ref: RSDKv3/Userdata.cpp:352-353,467-468, RSDKv3/RetroEngine.hpp:437
Bytecode detection probes two layouts in order after the pack opens:
Data/Scripts/ByteCode/GlobalCode.bin (BYTECODE_MOBILE) or GS000.bin
(BYTECODE_PC). Either lives inside Data.rsdk when the official pack
is present.
ref: RSDKv3/Reader.cpp:54-82
files:
- name: "Data.rsdk"
category: game_data
system: soniccd
required: true
source_ref: "RSDKv3/Userdata.cpp:352 (default name), RSDKv3/Userdata.cpp:467-468 (Dev:DataFile), RSDKv3/RetroEngine.cpp:302-305 (CheckRSDKFile call)"
note: |
Sonic CD assets (RSDK v3 container). Shipped with the official
Sonic CD release (Steam, iOS, Android, Sonic Origins). The engine
opens the file with fopen(); content is validated by trying to
load Data/Scripts/ByteCode/GlobalCode.bin or GS000.bin from
inside, not by hashing the pack.