Drew T
b5340f920b
- ULTRACODE worker_wave: 13 xHigh drafters over 6 cores (260-371 ins) + 7 B3 near-misses (100-141).
Usage-limit hit at 2/13 -> RESUMED (cached replay) -> 13/13 done, 7 match / 6 near.
- BANKED x1 (whole-binary byte-gate; R22 clean-fleet 140/140): func_8014ADE0 (139), func_8014E284 (108),
func_80137DD4 (129), func_801325B8 (113), func_801387B8 (100). NEAR: func_8013FAF8 (312 giant, def-sig
s16/s16 vs canonical s32/s32), func_8014F4C0 (in-TU byte-verified; unresolved decl conflict).
- NEW levers for the flywheel: §49-variant birthing-boost suppression via reg_n_sets 1->2 (func_801325B8);
sched1 birthing/LUID + "cc1 -dL" movable introspection (func_80177940); switch-tree vs jtbl
CASE_VALUES_THRESHOLD (func_801387B8). 6 near-misses carry byte-proven residual analyses.
- THREE TOOLING TRAPS (mine; ~3.5h lost, 0 data lost — all recovered):
(1) gate_stage's propagate is FLEET-WIDE (--auto-from): running gate_stage per-group ran it 4x
redundantly; 3 timed out at 3600s -> partial damage (90/140 broken, 887 files). FIX: --no-propagate
per group, then ONE targeted --addr propagate.
(2) a reverted src needs a RE-EXTRACT (R22 corollary): asm/ kept the banked state -> corpus.CorpusError
'5 stubs have NO .s on disk' (R34's second oracle caught it, working as designed).
(3) gate_stage's default .run/harvest_verified.txt ACCUMULATES + no --verified-out CLI -> PHANTOM
'banked:1' for a still-stubbed fn (R32/R35 class, still armed). Trust the SOURCE, not the report.
LAW: commit cheap verified banks BEFORE the expensive propagate.
- PROPAGATE DEFERRED, properly sized: 3/5 self-contained x138 = ~414 instances; 2 blocked on local types
(type-lift); straggler ov_SC03_093 needs --recover; measured ~2h+ (my 3000s guards killed it twice).
- fleet instr 71.0% / distinct 53.3% / fn-count 86.30%; dedup 1840/0; 0 NON_MATCHING (G4); main 143dbb89.
BFM-decomp
A matching decompilation of Brave Fencer Musashi (PlayStation, SLUS-00726, USA 1998) — the first public decompilation effort for this game.
What "matching" means
The goal is C source code that, compiled with the original-era toolchain (PsyQ 4.x / GCC 2.7.2-family + ASPSX via maspsx), produces a byte-for-byte identical SLUS_007.26 and, eventually, byte-identical overlay binaries. SHA1 checksums are the ground truth; "functionally equivalent" does not count.
No ROM content
This repository contains no game assets, no disassembly output, and no ROM-derived data — only source code, build configuration, symbol names/addresses, hashes, and documentation. To build or contribute you must provide your own dump of the game disc (4-track BIN/CUE, redump layout). See .gitignore for the firewall.
Project status
Latest (Phase 19, 2026-06-20): the project builds 136 binaries byte-identical from a clean tree (the EXE + the resident engine + all 134 location overlays);
make check-all→ 136/136. Fleet byte-identical-from-source is 58.0% (function-instance-weighted; see the PhaseEnds for the byte-weighted ~30% figure and what it includes). Shared engine functions are matched once inov_SC01_077and propagated ×134 viatools/dedup_propagate.py. (The narrative below is Phase-11/12-era; a full refresh is part of the public-flip prep.)
Gen1 (foundation) complete — the matching pipeline is proven end-to-end. make extract && make build && make check rebuilds SLUS_007.26 byte-for-byte identical (SHA1 143dbb89…) from C + assembly, reproducibly across many sessions.
- Compiler pinned by evidence:
gcc-2.7.2-psx -O2 -G0 -mips1 -mcpu=3000+maspsx --aspsx-version=2.56 --expand-div. - 52 functions hand-matched to byte-identical machine code — including the LZSS streaming decompressor — with a decomp-permuter + matching-cookbook "flywheel" to accelerate the next.
- 959 PsyQ SDK functions linked byte-identical (libcd, libgs, libgte, libspu/libsnd, libgpu, libc2, libmcrd, libapi/libcard, libetc) straight from the real PsyQ 4.0 libraries instead of re-decompiling them — bringing byte-identical-from-source coverage of the EXE to ~50%.
- File-loader / overlay system reverse-engineered, with the resident engine blob + location overlays' load addresses proven byte-identical against a live PCSX-Redux RAM dump.
About half the EXE is still INCLUDE_ASM stubs (correct bytes, not yet C), and the bulk of the game lives in compressed overlays inside the .CD archives — Gen2 (overlays & engine at scale) is underway:
- The build toolchain is binary-agnostic (one parameterized pipeline builds any binary), and the always-resident engine blob rebuilds byte-for-byte from source (SHA1
8e17e02f…) — the second binary reconstructed exactly, after the EXE — and is now 86% hand-matched C (123 / 146 functions, up from 0): its scripting turned out to be compiled-MIPS state/mode dispatch, not a bytecode VM, and the save-file + sound (SQV) formats are documented. The harvest used a reusable swarm-of-agents + bit-for-bit byte-gate method (a wrong match can't be accepted) —tools/harvest_verify.py+tools/match_one.py, which carry straight into the overlay phase. - A cross-binary deduplication pipeline is live: a Ghidra-free signer fingerprints all 134 location overlays, and the report finds ~9,000 byte-identical function groups shared across binaries (~28 MB of collapsible code) — a single engine function is byte-identical in all 134 overlays. This is "one match unlocks many": each engine match will be auto-credited across the overlay fleet.
Current phase and detailed progress live in phase-ends/ (newest PhaseEnd_*.md = current state); methodology, rules, and the full roadmap are in PROJECT_CONTEXT.md; environment setup in docs/SETUP.md.
This project is developed primarily by Claude Code driving Ghidra through an MCP server; see CLAUDE.md.
License
Private repository for now. AGPL-3.0 is planned at public release, modeled on sotn-decomp. tools/brave-CUE/ is CUE's BRAVE extractor (GPL, source included) and retains its own license.