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Decompilation of Castlevania: Symphony of the Night (PSX+Saturn)
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Luciano Ciccariello 3649d507c1
Decompress image assets found in the stage files as PNGs (#1868) 
Instead of outputting a `D_80123456.dec` from an extracted compressed
asset, now a PNG is written from the decompressed data from the
specified YAML entry. The asset tool will synchronize with splat to
retrieve the symbol names for graphics and palettes. The new splat
extension `cmpgfx` will also be able to detect unused graphics by
failing with a hint on how to tweak the YAML. That way I found some
unused placeholders under the name `stage_placeholder` and some kind of
beta graphics from the prologue stage.
2024-11-03 08:51:42 +00:00
.github/workflows Run progress dry-run on PRs 2024-11-02 00:33:56 +00:00
.vscode Custom debugging module (#108) 2023-08-10 18:55:24 +01:00
bin Use allegrex assembler for PSP (#1424) 2024-07-22 15:36:28 -04:00
cmake Texture render support (#934) 2024-01-01 23:31:56 +00:00
config Decompress image assets found in the stage files as PNGs (#1868) 2024-11-03 08:51:42 +00:00
disks Change how game assets are managed 2023-02-21 23:25:31 +00:00
docs Use built-in abs function (#1151) 2024-05-19 19:16:56 +01:00
include Decompile no0 Ouija Table components sub-entity (#1867) 2024-11-02 17:40:36 -07:00
src Decompress image assets found in the stage files as PNGs (#1868) 2024-11-03 08:51:42 +00:00
tools Decompress image assets found in the stage files as PNGs (#1868) 2024-11-03 08:51:42 +00:00
.clang-format Update clang-format as self-contained binary (#1257) 2024-06-04 21:07:50 +01:00
.gitignore Asset cutscene two stages (#1738) 2024-10-06 13:10:06 +01:00
.gitmodules Update splat to 0.24.4 (#1112) 2024-06-12 18:50:32 +01:00
CMakeLists.txt Replace g_HeartDropArray with PrizeDrops (#1787) 2024-10-14 01:06:52 +01:00
CNAME Create CNAME 2022-10-18 23:52:54 +01:00
CONTRIBUTING.md Update CONTRIBUTING.md (#721) 2023-10-31 20:34:50 +00:00
diff_settings.py MAR duplicates (#1618) 2024-09-16 18:19:29 +01:00
Dockerfile Add bsdmainutils to requirements (#1667) 2024-09-24 16:54:32 -07:00
go.work New asset manager (#1343) 2024-07-02 21:38:36 +01:00
go.work.sum Asset tool refactor (#1844) 2024-10-29 08:38:05 +00:00
LICENSE Add AGPL license (#1565) 2024-09-06 16:14:55 -04:00
Makefile Decompress image assets found in the stage files as PNGs (#1868) 2024-11-03 08:51:42 +00:00
Makefile.psp.mk Decompile PSP DRA file 63C90.c (#1861) 2024-11-01 20:20:37 +00:00
Makefile.psx.mk Decompile PSP DRA file 63C90.c (#1861) 2024-11-01 20:20:37 +00:00
Makefile.saturn.mk Rewrite Saturn make rules (#660) 2023-10-03 21:42:08 +01:00
README.md Adding tt_002 (Faerie) overlay (#1801) 2024-10-17 14:02:53 -07:00
weapon0.ld Import w_037 data and normalize weapon palette (#1777) 2024-10-11 18:36:59 +01:00
weapon1.ld Enhance Makefile for WEAPON0.BIN (#466) 2023-08-14 02:03:54 +01:00

README.md

Castlevania: Symphony of the Night Decompilation

A work-in-progress decompilation of Castlevania Symphony of the Night for Sony PlayStation 1, Sony PlayStation Portable and Sega Saturn. It aims to recreate the source code from the existing binaries using static and/or dynamic analysis. The code compiles byte-for-byte to the same binaries of the game, effectively being a matching decompilation.

It currently supports the following versions of the game:

  • us the reference build with the serial number SLUS-00067
  • hd an unreleased PS1 Japanese build found in Castlevania: Dracula X Chronicles game data
  • pspeu European build from Castlevania: Dracula X Chronicles
  • saturn the port created by an external development team

This repo does not include any assets or assembly code necessary for compiling the binaries. A prior copy of the game is required to extract the required assets.

Bins decomp progress

File name Code coverage Decomp functions Description
SLUS_000.67 code coverage SLUS_000.67 decompiled functions Shared libraries
DRA.BIN code coverage DRA.BIN decompiled functions Game engine
BIN/RIC.BIN code coverage RIC.BIN decompiled functions Playable Richter
BIN/WEAPON0.BIN code coverage WEAPON0.BIN decompiled functions Equippables
ST/CEN/CEN.BIN code coverage CEN.BIN decompiled functions Center
ST/DRE/DRE.BIN code coverage DRE.BIN decompiled functions Nightmare
ST/MAD/MAD.BIN code coverage MAD.BIN decompiled functions Debug Room
ST/NO0/NO0.BIN code coverage NO0.BIN decompiled functions Marble Gallery
ST/NO3/NO3.BIN code coverage NO3.BIN decompiled functions Entrance (first visit)
ST/NP3/NP3.BIN code coverage NP3.BIN decompiled functions Entrance
ST/NZ0/NZ0.BIN code coverage NZ0.BIN decompiled functions Alchemy Laboratory
ST/SEL/SEL.BIN code coverage SEL.BIN decompiled functions Title screen
ST/ST0/ST0.BIN code coverage ST0.BIN decompiled functions Final Stage: Bloodlines
ST/WRP/WRP.BIN code coverage WRP.BIN decompiled functions Warp Room
ST/RWRP/RWRP.BIN code coverage RWRP.BIN decompiled functions Warp Room (reverse)
BOSS/MAR/MAR.BIN code coverage MAR.BIN decompiled functions Maria cutscene
BOSS/RBO3/RBO3.BIN code coverage RBO3.BIN decompiled functions Medusa boss
SERVANT/TT_000.BIN code coverage TT_000.BIN decompiled functions Bat Familiar
SERVANT/TT_001.BIN code coverage TT_001.BIN decompiled functions Ghost Familiar
SERVANT/TT_002.BIN code coverage TT_002.BIN decompiled functions Faerie Familiar

Code coverage means how many bytes of code have been successfully converted from assembly into C code, while decomp function is how many functions have been successfully decompiled.

Useful links

Decompiling a game is a mastodontic task. If you have some basic programming skills, please join us in this journey. Any contribution will be very appreciated!

Join to our Discord server

Special thanks

This project is possible thanks to the hard work of tools provided by the Decompilation community:

  • mips2c from @matt-kempster to decompile MIPS assembly into C. This has proven to be more accurate than Hexrays IDA and Ghidra.
  • splat from @ethteck to disassemble code and extract data with a symbol map. This tool provides the fundamentals of the SOTN decomp.
  • asm-differ from @simonlindholm to know how the decompiled code compares to the original binary.
  • decomp-permuter from @simonlindholm to pick different versions of the same code that better matches the original binary.
  • maspsx by @mkst to replicate the customized assembler used in the official PSX SDK.
  • decomp.me by @ethteck, @nanaian and @mkst to provide a collaborative decompilation site to share and contribute to work-in-progress decompiled functions.
  • frogress by @ethteck to store and retrieve progression data.
  • esa-new by @mkst as an inspiration on how to set-up a PS1 decompilation project.
  • oot as an inspiration of what it is possible to achieve with a complete decompiled video game.