Module read2007_diag 

Diagnostic: capture the (frame, scanline, dot, mask) of $2007 reads to pin where the $2007 Stress test’s per-dot reads land vs the visible scanline they target. Gated; default build unaffected.

Statics

IDX

Next free slot (count of captured $2007 reads).

LOG

Packed: ((scanline+1)<<18) | (dot<<5) | (rendering_enabled<<1) | is_render.

RENDER_BUFFER_DEFER_V_INC

Sub-knob: defer the $2007 v-glitch increment to the TStep dot.

RENDER_BUFFER_DOT_DELAY

Tunable PPU-dot countdown: $2007 read-during-rendering to reload.