Walk-on trigger sidecar (.PCH) Confirmed

An earlier reading placed a second copy of the prescript at +0x800 inside the .PCH and called it dead because efect.dat overwrote it. It came from an over-reading PROT entry size that appended the neighbour to every buffer. The entry ends at 0x800; the prescript is the next PROT entry, staged by its own load. See do not re-walk.

FUN_80021934 (entry three instructions before the 0x80021940 prologue) is a 5-state streaming actor (state actor+0x1A, jump table 0x80010760) that pre-streams the next scene's asset bundle during the transition fade. It is spawned by the scene-change packet FUN_8001FD44 through the pool spawner FUN_80020DE0, from a 24-byte system-actor descriptor at 0x80070734; all five call sites are in overlay 0897 (field-VM op 0x3F plus four controller sites).

• Case 0 seeds a 70-frame countdown; cases 1 / 3 poll stream progress.
• Case 2 (retail, _DAT_8007B8C2 set): streams raw TOC entry DAT_8007B768 + 3 - the destination block's .LZS slot - into _DAT_8007B85C by index.
• Case 4: builds DATA_FIELD\<scene>.LZS by name, then hands off to mode 2 (main init), whose chain stages .MAP / .PCH / efect as above.

The transition actor touches only n + 3; _DAT_8007B85C never holds the .PCH.

dolk2 and rikuroa are the two scenes whose own base+3 bundle is the MAN-less count=4 form (types [1, 2, 6, 0x14]). Their scripts come from a standalone data_field_streaming entry in the same block whose type-3 chunk is a plain MAN (dolk2 extraction 70, rikuroa extraction 157); the live script heap at the Caruban beat byte-matches that chunk. Engine: scene_bundle::streaming_man_payloads.

History: extraction entries 0076 and 0164 appeared to embed a 7-asset bundle at 0x1000. The bytes from 0x1000 are byte-identical to extraction 0078 and 0166 - the slice over-read into the next entries. Those windows are suimon's and geremi's .PCH files under the position law.

Extraction filename labels apply CDNAME defines as extraction indices and land one block late. 0093_map01.BIN is garmel's table; Drake map01's is 0084_suimon.BIN (the only one carrying p2 = 0x26, the fly-in record); town01's is 0002_gameover_data.BIN, holding the opening trigger (0x1D, 0x5B, 0x03). See CDNAME numbering.

use legaia_asset::scene_v12_table;

let buf = std::fs::read("extracted/PROT/0093_map01.BIN")?;
let t = scene_v12_table::detect(&buf).expect("v12 header valid");

println!("N={}, param={}", t.n, t.param);
for (i, rec) in t.records.iter().enumerate() {
    println!("rec[{i}]: b0={:02x} b1={:02x} b2={:02x}",
             rec.b0, rec.b1, rec.b2);
}

Detection: len >= 16; u16[1] == 0x0012, u16[2] == 0, u16[3] == 0x0014, u16[6] == 0; u16[0] == u16[5] + 4; u16[7] == u16[5] + 2; param <= 1024; N == 4 * param + 22.

• The empty sub-table bodies. Whether any runtime writer fills the zero words at +N..+N+4 needs a targeted capture of the +0x12000 window.
• Empty kinds 0 / 2 / 3. No retail .PCH populates teleports, elevation overrides or region boxes; those live only in the .MAP block.
• Prescript scope. The next-entry prescript and the .LZS bundle's scripted-table prefix both carry stager records; which each supplies at runtime is unpinned.

Falsified leads, kept so they are not re-walked: the _DAT_8007B8D0 relocation is the efect.dat stager; the type-dispatch loader never sees the .PCH (it is a top-level PROT entry, not a typed chunk); FUN_8002541C is a generic streaming driver.