# Supplemental References (Claude pass)

These notes supplement the top-level `references/` files produced by the Codex
pass. Goal: add sources Codex did not surface, without duplicating its memory
map / workstream / emulator-landscape work.

Files in this folder:

- `sony_official_docs.md`: primary Sony register manuals for GS and the VUs.
  Codex leaned on `ps2tek` (community-compiled); these are one layer closer to
  the silicon.
- `fpga_prior_art.md`: PSX-on-FPGA projects. None are PS2, but they are the
  closest real-world methodology templates for a console-gen FPGA effort.
- `architecture_studies.md`: high-level architecture writeups, an academic
  VU-on-FPGA feasibility thesis, and MiSTer community consensus on why PS2
  has not been attempted.
- `source_log.md`: sources introduced in this pass, with URLs and short notes.

These are reference-only. No implementation claims, no planning overrides —
Codex's `implementation_workstreams.md` remains the planning map.