Sets up the foundation for reimplementing the PS2 game in Rust rather than
emulating it. Nothing is implemented yet; this is the scaffold, the verified
target and the working agreements that keep a long project coherent.
Target disc, verified against a real image:
SCUS_972.68 v1.01, USA Black Label, NTSC 60 Hz
boot ELF 2,618,684 bytes, SHA-1 bacda860...d098a77, entry 0x00131AE8
The entry point independently matches the value recorded by the rac2-gc-decomp
community reference, which cross-confirms the identification. This is the exact
build the upstream research pins; Greatest Hits v2.00 is a different binary and
is not the target. NTSC matters beyond label compatibility: PAL discs run 50 Hz,
which would make chargeboots and other speed-sensitive movement run at 5/6
speed. Verifying the disc before writing movement code avoids discovering that
in Phase 5.
Contents:
- Five-crate workspace (formats, extract, game, video, engine) on Bevy 0.19.1,
matching the version ReRAC uses so its Graphics Synthesizer and VU work stays
portable. `cargo check --workspace` is clean.
- tools/identify-disc.py, which reproduces the identification against any
disc image and distinguishes a truncated dump from a non-PS2 image.
- .githooks/pre-commit, refusing game data from entering git history: disc
image extensions, asset directories, container signatures at offset 0, and
files over 50 MiB. Verified against seven cases including a disc image
renamed to look like source. Now that this pushes to a remote, this matters
more than it would have locally.
- AGENTS.md, the operating agreements: no game data ever, reproduce the PS2
float model rather than approximating it, bound every read, verify against
the real disc.
- PROVENANCE.md, recording that this follows ReRAC (ISC) and learns from
rac2-gc-decomp (MIT). Wrench is used as a written specification only and no
GPLv3 code is copied, since that would relicense everything derived from it.
RAC2Decomp is explicitly not used: its provenance is disputed in the upstream
community reference, and it targets the wrong region.
- docs/roadmap.md, phased so the riskiest unknowns are retired early. The two
that matter: overlay relocation transfers from ReRAC and makes 27 level
overlays tractable, while VU1 microcode is binary and is the hardest single
item. Phase 5 is a deliberately scoped Veldin vertical slice as the go/no-go.
ReaperOfVeriod
a02f79a6d1