Init gate fully decoded: $BF passes ($1074 writes $40 per frame)

The alternate path $F63D clears bit6 (AND #$BF) when the input bit is held — classic press-edge + debounce + accept state machine. If that routine is the attract builder and SHOULD be writing real entries + terminator instead of $00, the divergence is inside IT (mislifted compare, wrong input, or an early-exit our runtime takes).

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