CSB V1 Mechanics Audit

Audit date: 2026-08-31 Primary reference: local ReDMCSB WIP Toolchains/Common/Source Scope: native Firestaff CSB V1 mechanics. Game archives are consumed in memory; no emulator or extracted-game-data dependency is implied.

Result

This page replaces the May 2026 speculative gap list. The items below have the implementation/evidence status shown below. Passing a unit or bounded runtime test does not claim a complete original-media playthrough or visual parity.

ReDMCSB delta	Firestaff implementation	Regression evidence	Status
24-level CSB world	`CSB_MAX_LEVELS`, CSB dungeon world and loader	`csb_v1_decompdu_pc34_compat`	Bounded implementation verified
compressed dungeon stream	`csb_v1_decompdu_pc34_compat.c` bit-packed decoder with explicit bounds checks	`csb_v1_decompdu_pc34_compat`	Bounded implementation verified
ZOKATHRA object creation	Source requires C51 junk allocation, not a fireball or DM1 no-op	ReDMCSB `MENU.C:1994–2027`; false unused power helper/test removed	CSB live cast implementation and capture remain open
Grey Lord	CSB Grey Lord proximity/attack classification helper	`csb_v1_grey_lord_combat_pc34_compat`	Bounded implementation verified
CHANGE7_24 reincarnation	source-family vitals/stat/RNG path	`csb_v1_champion_per_stat_parity_pc34_compat`, `csb_v1_reincarnation_media_branch_pc34_compat`	Covered at runtime boundary
CHANGE7_20 projectile cadence	CSB normalization keeps `+1` on every map	`csb_v1_projectile_speed_pc34_compat`	Scheduler verified
BUG0_69 teleporter access	CSB defaults to the CSB expansion: Lord Chaos, Lord Order, Grey Lord and Materializer	`csb_v1_graphics_extras_pc34_compat`, `csb_v1_lord_chaos_teleport_dir_pc34_compat`	Fixed 2026-08-31

Source notes

ReDMCSB CHAMPION.C:F0306 is compiler/package-sensitive. CSB Atari ST, FM Towns and Amiga take first-operand-first arithmetic; this is selected at native handoff, not exposed as a presentation option.
PROJEXPL.C:F0219 distinguishes DM1’s non-party-map delay from CSB’s normalization. The Firestaff scheduler retains that difference.
GROUP.C CHANGE7_19 / BUG0_69 requires a valid direction before indexing. The Firestaff direction gate is tested separately from the CSB teleporter eligibility rule.

Remaining evidence limits

The supplied Atari, Amiga and FM Towns archives now pass boot and launcher handoff checks. Still required for broad mechanics completion are authentic long-route captures that include a CSB Grey Lord encounter, ZOKATHRA cast, teleporter traversal, save/cold-resume, and end-game transition. Those captures must be derived from real media; no synthetic campaign data can earn the remaining parity credit.