Drew T
c697746462
Plan-approved campaign (Fable5Max, ~/.claude/plans/optimized-squishing-engelbart.md). I.0 = capture
while hot (R30/R31), before any code:
- memory-map.md §"Phase 30 S44": the COMPLETE loader routing table, static-derived (G5) — the EXE's
loadDestPtrTable (0x80072C70: resident/overlay/slotA/slotB/type-7), the boot k-set {1,3,8,10,11},
the RESIDENT's index tables D_800D3764 (29x8, MAIN/13-41 -> 0x800CAE08) and D_800D384C (6x8,
MAIN/42-47 -> 0x800CCB1C), resident.c:641 (MAIN/12 -> 0x80128158), the SC07 pair's header-derived
0x801A00D8, gbase arithmetic (LIST.CD carries LBA+len ONLY), the slot-adjacency proof, the
module-id-word law (word0, dense 0x13..0x73, resident=0x36; MAIN/9-vs-39 duplicate flagged), and
"PAC type 1 = uncompressed overlay, type 4 = LZSS". SUPERSEDES P3-T5's "entries [1]+ are
runtime-indexed (no static xref)".
- disc-completeness.md: the "only knowable by runtime RE" doctrine REFUTED in place (H5, original
kept) — 46 of 78 addresses are static; the runtime-only remainder is 28 script modules + 4
stragglers, parked for L3 with evidence. Byte-sum correction (rows 3,406,325 B vs bucket
3,564,021 incl. PAC headers), MAIN/7 raw-path exception, MAIN/0≡1.
- tooling-audit.md §S44: EVERY tool classified with file:line — 8 must-change (family_remap VRAM
const, Makefile+modules.mk, sig-target generalization, audit_binaries de-ov_, family_hseq/
progress:647/audit_frontier globs, corpus.sig_is_independent), 7 one-line registrations, 5
retirements (disc_code_sweep superseded by disc_audit; reconcile_decls; 3 rollout one-shots;
ImportOverlay/VerifyOverlay.java), rest auto-OK/N-A. new_overlay.sh -> new_binary.sh design.
- decision-log (R31): the pivot entry — the emulator dependency dissolves; the "modules" mostly
dissolve into overlays (~75-77% h_exact-known; 802 novel fns); why the doctrine was missable for
30 phases (a confident negative doctrine is a claim like any other — date it, cite it, re-measure).
- cookbook §154 + index regen (454 sections): module-id word / dual base-voting (h_exact ~500:1 +
jal-alignment, must AGREE; thin votes => park, P9) / diff a mystery payload's head against classes
you already own before inventing a new one.
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.