Static SUBPOS_DELAY 

pub static SUBPOS_DELAY: AtomicI32

v2.0 final lever #1 (mc-r1-dmc-halt-subpos): swept per-CPU-cycle arm DELAY.

Number of CPU cycles to DELAY the $540 X=10/11 reload arm (pattern-A boundary) past the natural cannot_run-deferred re-arm. Sub-APU-cycle granularity the byte-timer phase shift cannot express. 0 = arm at the boundary (no delay). Env RUSTYNES_SUBPOS_DELAY (default 1).