The tester's ER small laser died permanently (recharge arc + ready dot dark,
no fire) after idle seek-gear clicking. Root cause, byte-verified + headless-
reproduced -- a latent bug in the SHIPPED ARCADE BINARY:
- The charge integrates toward the GENERATOR voltage (@004ba838), not the
gear target; "full" is only detected inside the +-1% snap window around
seekVoltage[idx] (@004ba738), and overcharge reads ZERO (the byte-verified
_DAT_004ba830 = 0.0 clamp).
- Toggle seek while a charge is in flight and the level can land ABOVE the
new gear's window: rechargeLevel pins to 0, the ==1.0 Loaded test can
never fire, and charging continues to the generator ceiling where EVERY
gear reads overcharged. Permanent brick; generator reselect cannot help.
- The arcade dodged it by circumstance (locked 60 fps, rare seek use); the
port's clickable seek button hits it in seconds of casual clicking.
Fix (marked divergence in the Loading tick): overcharge counts as fully
charged -> Loaded. The arcade's own discharge algebra says full == the
gear's seek voltage, so an overcharged weapon IS full.
Verified: the same 2.5-min BT_SEEKTEST abuse that bricked the laser pre-fix
now fires 38 overcharge rescues and ends Loaded/pct=1. [seek] log now also
prints the per-gear voltage table + gen voltages (diagnosis instrumentation).
Ruled out on the way (documented in #21): overheat fuse (no firing occurred;
a 4-min autofire+coolant-abuse run wouldn't fuse), generator detach (gen
cycling + healthy siblings), seek-table corruption (table {6000,7000,8000,
9900} healthy).
KB: decomp-reference.md records the arcade-latent-bug analysis.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
