ReDMCSB DM1/CSB Native Parity Audit

Audit date: 2026-08-31 Reference: local ReDMCSB WIP20210206, Toolchains/Common/Source/ Scope: Firestaff’s native DM1 and CSB V1 routes. ReDMCSB establishes control flow and data ownership; it is not treated as a substitute for original-media captures.

Corrections made from source review

Area	ReDMCSB evidence	Firestaff correction	Verification
DM1 psychic defence	`CHAMPION.C:F0321` calls `BASE.C:F0030`; the scaled product truncates	Removed a host half-up rounding step from `F0762_MAGIC_GetDefenderPsychicAdjustedAttack_Compat`	`dm1_v1_combat_damage_source_lock`
DM1/CSB low-stamina arithmetic	`CHAMPION.C:F0306` documents package/compiler operand-order behaviour	Native handoff chooses first-operand semantics only for Megamax Atari ST and High C FM Towns; PC 3.4 and DM1 Amiga 2.x retain second-operand semantics	`dm1_v1_f0306_stamina_pc34_compat`
DM1 PC 3.4 screen palette	`DATA.C:G0347` and `PALETTE.C:G3088` give the top/bottom RGB4 values	Replaced a hand-written Atari-looking DAC palette in the PC3.4 compatibility screen with the exact `G0347` values, losslessly expanded into the host DAC6 representation	`dm1_v1_screen_framebuffer_pc34_compat`, `dm1_v1_pc34_native_cli_boot`, `dm1_v1_dos_en_archive_cli_boot`
DM1 floor-object relocation	`DUNGEON.C:F0163` (line 1769) appends one THING only after clearing its next link; `F0164` (line 1840) removes the current list owner before a move. `MOVESENS.C:804→870` demonstrates that order in a source movement path.	Made the compact floor-cell drop transaction unlink → capacity-check → link, including rollback on a full destination; it can no longer leave duplicated floor entries or move coordinates without a list entry. The live M11 regressions follow authentic Atari ST and Amiga C2548 alcove objects through `F0302` inventory→mouse-hand and `F0374` mouse-hand→floor, then read the compact source chain to require exactly one owner.	`dm1_v1_object_interaction_source_lock`; `m11_dm1_real_alcove_item_runtime_atari_st`, `m11_dm1_real_alcove_item_runtime_amiga20` (retail ZIPs, in-memory)
DM1 real archive object transfer	`CLIKVIEW.C:F0373` moves the painted pile-top THING to `G4055`; `PANEL.C:F0302` then owns placement in a legal inventory slot	Alcove hit-testing now accepts the visible native F0132 destination rectangle as well as PC34 F0791/C2500 zones. Atari ST 1.2 and Amiga 2.0 archive tests verify pickup, legal inventory placement, and floor ownership after drop.	`m11_dm1_real_alcove_item_runtime_atari_st`, `m11_dm1_real_alcove_item_runtime_amiga20` (original ZIPs, in-memory)
DM1 HoC wall object visibility	`DUNVIEW.C:F0115` classifies drawable items from the current square’s Thing chain; `REVIVE.C:F0280` consumes C127 mirror candidates. Ordinary wall sensors such as C013 are independent controls.	Limited HoC payload suppression to C127 mirror controls and recognized mirror text. A generic sensor no longer suppresses unrelated original wall objects; the PC34 stair-torch regression verifies its F0115 candidate and exact global ornament 32 pixels from original `GRAPHICS.DAT`.	`dm1_v1_projectile_explosion_render_pc34_compat`; `dm1_v1_viewport_floor_ceiling_items_pc34_compat`; `m11_dm1_hoc_wall_material_receipt_pc34` (PC34 ZIP, in-memory)
DM1 alcove cross-platform fixture coverage	`DUNVIEW.C:F0124` only presents an item when the original wall Thing chain contains both an alcove sensor and an item	The real-media test also boots IIGS 2.1 and FM Towns English archives, then skips the interaction when that source-owned Thing-chain fixture is absent; no item is synthesized for coverage.	`m11_dm1_real_alcove_item_runtime_iigs`, `m11_dm1_real_alcove_item_runtime_fmtowns` (original media, in-memory; skipped: fixture absent)
DM1 PC 3.4 audio from selected archive	`SOUND.C:F0740-F0743` consumes `SONG.DAT`; `SWSH.C` drives the title PSG program, while `GRAPHICS.DAT:SND3` owns in-game effects	The audio locator now recognizes a selected retail ZIP as a data root and passes `ZIP::DATA/SONG.DAT` and `ZIP::DATA/GRAPHICS.DAT` to the shared bounded reader. No media file is extracted or written. The source music gate and live M11 audio initialization both exercise those virtual paths.	`dm1_v1_f0740_f0743_music_source_gate`; `dm1_v1_swsh_psg_audio_pc34_compat` (PC34 ZIP, in-memory)
DM1 PC 3.4 sound-event arbitration data	`DATA.C:1264-1310` MEDIA719/MEDIA712 defines all 35 I34E rows; `SOUND.C:F0064/F0065` consumes each row’s period, priority and loud/soft distances	Replaced guessed host values with the exact source rows and rejects invalid event indices before M11 presentation. A packed-media gate binds every event to its authentic SND3 item and decodes the complete source bank in memory.	`dm1_v1_sound_music_source_lock`; `dm1_v1_audio_source_closure_real_pc34`
CLI selected-game ingress	ReDMCSB’s `STARTUP1.C` → `TITLE.C:F0437` → `ENTRANCE.C:F0441` path is reachable only after the caller has selected the game; `--menu` is an explicit alternative path	Initialised `M11_PhaseA_Options.menuRequested`. The field had been added to the public options type without a default, so stack bytes could make ordinary `--game dm1` silently retain M12 instead of entering the selected-game transaction	`m11_direct_launch_prepare_all_games`; debugger-backed native CLI option check (`directLaunch=1`, `menuRequested=0`)
DM1 open fake-wall floor ornaments	`DUNGEON.C:F0172` converts an open fake wall to a corridor, then calls `F0170` for `M558`; a closed fake wall instead follows the wall route	Preserve that effective-element conversion when calculating the M11 floor-ornament ordinal, so an open fake wall may expose its source-owned random ornament while a closed one cannot	`test_m11_overlay_command_queue_block`
DM1 closed fake-wall wall sensors	`DUNGEON.C:F0172` converts a closed fake wall to `C00` before walking wall `TEXTSTRING`/`SENSOR` things	Use the effective wall class for the M11 sensor and ornament draw paths, so visible source ornaments on closed or imaginary fake walls are no longer discarded as raw type `C06`	`test_m11_overlay_command_queue_block`
CSB teleporter eligibility	CSB’s Lord Chaos/Grey Lord/Materializer rule differs from the DM1 comparison path	CSB helper defaults to the CSB rule and exposes DM1 only as an explicit comparison mode	`csb_v1_graphics_extras_pc34_compat`
CSB F0093 creature palette	`DUNVIEW.C:2805-2815` restores colour slots 9/10 through replacement sets 8/12 before walking `CurrentMapAllowedCreatureTypes`; Atari and version-3 `G2025`/`F0695` tables have distinct D3 targets	The live M11 adapter resets both slots, applies the current map’s final ordered owner, and selects the source palette family for Atari, Amiga, and FM Towns rather than applying PC targets	`csb_v1_f0093_replacement_palette_pc34_compat`, real Atari/Amiga/FM Towns startup and M12→M11 handoff tests
CSB Atari MSA intake	Atari preservation media must be decoded in memory before the FAT-owned game files are read	Removed an impossible host-size overflow branch after retaining the actual MSA bounds (`<=64` sectors/track, `<=2` sides); the remaining multiplication guards cover the decoded image	`csb_v1_atari_msa`
CSB FM Towns F0115 group blit	`DUNVIEW.C:F0093` applies the current map’s ordered allowed-creature palette owners before `F0115` draws a group	The F31 runtime stores its admitted dungeon outside M11’s legacy DM1 mirror. The palette bridge now reads that real map’s metadata list directly from the owned dungeon payload, so F0093 can complete and the IMG2-backed Prison group blits rather than failing closed	`csb_v1_fmtowns_en_m11_real_media_handoff`, `csb_v1_fmtowns_ja_m11_real_media_handoff`
CSB M11 input bridge scope	`COMMAND.C:F0361/F0380` queues and dispatches C001..C006; mouse hits reach the same queue through `F0358/F0359`	Corrected stale wording that described the narrow event translator as an active playability TODO. M11 owns the live keyboard, pointer, and gamepad consumers and invokes the bridge only for the source command queue transition	`csb_v1_input_command_bridge_pc34_compat`, `csb_v1_command_input_geometry_pc34_compat`, `m11_gamepad_csb_input_bridge`
CSB launcher-gate regression fixture	M12’s current interaction is game card -> platform card -> presentation card -> launch; it must not silently reinterpret a platform-selection action as a launch	Marked the fixture as already past the platform-card step before it sends `ACCEPT` to the canonical launch gate. The test again verifies the intended invariant: hash-shaped launcher metadata can form an intent but cannot manufacture the absent original files needed by the native CSB boot profile	`csb_v1_required_complete_launches`
DM1 FM Towns picture-library loader test	The shipped Towns runtime owns `DATA/GRAPHICS.DAT`; ReDMCSB’s FM Towns source maps this through `INIT_PIC_LIB` / `READ_ASSET` rather than a generated cache	Removed the test-only `/tmp` fixtures. Fixtures now stay in CTest’s build working directory and are removed after each assertion, matching Firestaff’s no-extraction storage rule	Rebuilt `test_dm1_v1_fmtowns_pic_library_loader`; direct CTest pass

Validated boundaries

DM1 supplied DOS, Atari ST, Amiga and FM Towns media boot through the native CLI/start-menu paths. This is start and handoff coverage, not a full campaign or pixel-parity claim.

On 2026-08-31, an independent native CLI boot-probe repeated this result against the current user data root, without an emulator or extracted game directory. Each route reached phase=dm1-runtime and loaded map 0 at party position (1,3):

Selected platform	Preserved source form	Native decoder handoff
PC DOS 3.4	`Dungeon-Master_DOS_EN_Version-34.zip::DATA/GRAPHICS.DAT`	`pc-img3`
Amiga 2.0	nested ZIP → ADF → `GRAPHICS.DAT` virtual member	`amiga-img2`
Atari ST	nested ZIP → STX → `GRAPHICS.DAT` virtual member	`atari-st-dmcsb1`
FM Towns EN/JP disc archive	ZIP-resident disc members	`fmtowns-tmenu-edm`; verified `EDM.EXP` and CDDA track 2

The virtual-member notation records in-memory reads only. It is not an extraction step and does not grant campaign or original-frame parity.

On 2026-08-31 the rebuilt targeted DM1 real-media suite passed every runnable route: PC 3.4, DOS archive, Atari ST (English/German/French), Amiga HD/v2.0, and FM Towns archive boot; the loader, CD/audio, menu, graphics, and Amiga data readers also passed. The sole skipped gate requires a separately supplied authentic F0134/F0135 material capture and remains correctly non-promoted.
The direct 11-route CLI matrix was also rerun on 2026-08-31 after the floor-object ownership repair. It passed PC 3.4 (plain and nested archive), English and French DOS, English/German/French Atari ST, two Amiga archive layouts, and the FM Towns archive. Every assertion reads the supplied media as an in-memory member and requires the native start-menu and runtime handoff; none accepts an extracted directory, emulator process, or generated game-data fallback.
CSB supplied Atari ST, Amiga and FM Towns media boot through the native routes. The CSB map loader, teleporter chain, projectile cadence, end-game raw receipt and version gate have focused regression coverage.
CSB entrance resources are platform-specific. FM Towns is verified at the framebuffer level: the real F31 C004 screen is composed with the original C002/C003 closed-door strips, with an exact three-source receipt and the C28 entrance palette. Amiga uses its own A31/A35 C004/C002/C003 records and native palette register; the supplied loose and ZIP-to-ADF routes reach that entrance and complete the source-owned transition. Atari ST does not ship this C004/C002/C003 asset family: its original ANIMATE.SCR/ANIMATE.DAT route is separately verified. These are deliberately not interchangeable, and CSB has no DOS/Windows/PC game route.
On 2026-08-31 the rebuilt focused CSB real-media suite passed its Atari ST, French Atari, Amiga, and FM Towns (English/Japanese) routes, including M12-to-M11 handoff, source palette selection, teleporter rotation, Lord Chaos direction, projectile post-teleport consumers, and real graphics readers. After the FM Towns F0093 repair, the complete labelled CSB CTest suite (161 tests on the current tree) passed without failures. This closes no capture-only item below; it confirms that the implemented source rules admit the supplied media without an emulator.
The directly exercised native CLI matrix additionally passed against the supplied Atari STX, nested Atari ZIP, Amiga archive, and FM Towns EN/JP archives. It verifies the native source title phase, explicit source input into the initial Prison runtime, the bounded first-command matrix, and the mouse/keyboard start-menu route. The Atari route is intentionally expected to remain in ANIMATE.SCR until Enter; merely reaching that title is not reported as a loaded dungeon.
All reviewed code consumes game archives in memory. No emulator, BIOS or extracted-game-data directory is required at Firestaff runtime.
DM1 PC 3.4’s selected ZIP is also a first-class audio root: SONG.DAT and GRAPHICS.DAT:SND3 are read as individual virtual members, and the source-owned F0740-F0743/music plus SWSH/PSG tests pass against that form.
The PC 3.4 sound-event identity and source metadata are closed for all 35 events: the exact I34E periods/priorities/distances are verified and every mapped SND3 payload decodes from the selected packed ZIP. This does not by itself claim original multi-event cadence or overlap capture parity.
The FM Towns loader regression is rebuilt before interpreting its result: a stale executable compiled against an older layout can produce an invalid free and is not evidence of a runtime media defect.

Evidence still required

The following are deliberately not marked complete without original media captures:

DM1 original-save interoperability over a corpus of real campaigns. The distributed archives do not contain a save corpus.
CSB long-route captures covering a Grey Lord encounter, ZOKATHRA cast, teleporter traversal, cold save/resume and end-game presentation.
CSB Atari creature captures on a BUG7_01 map. The source reset/order is now runtime-bound, but a real frame comparison is still needed for pixel-level confirmation.

Synthetic fixtures may isolate these rules in tests, but they do not satisfy any of the capture requirements above.