Closing the residual I left explicitly unidentified last iteration, and
correcting my own claim twice over in the process.
The cheap test first: is the oscillation global? No -- the bottom-right
corner is flat at sd 0.003 and uncorrelated with the whole frame. So a
per-tile amplitude map over an 8x6 grid, which localises it hard: sd 7.65
in the band x 318..954, y 560..672 at lag 2.3 s, against 0.06 on the
wordmark. That band is the PRESS (A) BUTTON plate's rest position.
Decoding ptbtn00f.rat, the plate's highlight variant, gives the pulse
itself: alpha 0x00 -> 0x06 -> 0x4a -> 0x50, held, then back down through
0x4a to 0x06 across t=6..105. A glow that fades in and out, which is
exactly what a press-start prompt does.
So "the title screen loops at 2.2 s" was wrong in both halves. The title
ART is near-static apart from the two decoded sweeps at 7.5 s and 9.5 s;
what pulses is the PLATE, and the plate is build 2, not build 4. REFUTED
carries it under my own name.
Still amber, and said so rather than rounded off: the cycle LENGTH is not
readable. The keyframe group's last block has no time -- that slot
belongs to the next group -- so the declared span is at least 105 units,
1.75 s, against a measured 2.3 s. Consistent with a final block
extending the tail. Not confirmed.
2614cb1192