The sprite-vs-logic "drift" is a discrete one-band (22-row) misplacement toggle, not timing drift

First continuous [SPR] dataset (Finding 111) across 1800 TAS frames decomposes the F108 divergence completely. (1) When the pac sprite IS drawn (19-row GRP1 window), the RAM->render mapping is EXACTLY y_screen = 2*pacY + 6 (anchored rows) — locked for 150 straight frames at gameplay start and again in the f=1700+ wall-hold era; there is NO continuous drift and NO timing-residual component.

Raw traces, ROM material, local paths, and personal data are not part of this public record.