- 3,058 instructions (37.5% code), 48 semantic labels, 174 zero-page aliases - BYTE-IDENTICAL build verified - Key routines: Reset, NmiHandler, MainGameLoop, GameModeDispatcher, InitPPU, InitVariables, UpdateController, UpdateSprites - Zero-page aliases: PPUCtrlShadow (/bin/bash8), PPUMaskShadow (/bin/bash9), GameMode (4), RoundIndex (6), DispatchIndex (A) - Root OVERVIEW.md updated to reflect Pass 2 completion and correct mirroring (Horizontal)