arcattackandClaude Opus 4.8
c79b9953f9
The #2 audit (BT_CTRLMAP_LOG) proves the Eng-page button->msg-3 route was always authored (121-mapping L4 ControlMappingsList, ~a dozen EVENT msg 0x3 entries; weapons via Eng-page aux elem 0x21 mask-gated per ModeMFD page). It was "silently dead" ONLY for lack of the id-3 handler, which the prior commit wired -- so coolant priority via the MFD "Display -> Coolant" button now works end-to-end. (The mask-0xffffffff msg-3 entries at 0x12/0x14 go to ThermalSight/Searchlight on the PowerWatcher branch -- separate, untouched, no collision.) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
220 lines
17 KiB
Markdown
220 lines
17 KiB
Markdown
---
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id: pod-hardware
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title: "Pod Hardware — the fixed target (7 monitors, D3D9, RIO)"
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status: established
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source_sections: "PROGRESS_LOG.md §3; the PLATFORM PROFILE + GAUGE DEV-COMPOSITE notes"
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related_topics: [gauges-hud, rendering, project-overview]
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key_terms: [pod, RIO, MFD, IG-board, SVGA16]
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---
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# Pod Hardware (the fixed target)
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The port must run on (a) a dev box and (b) the fixed arcade pod. The pod is a hard constraint that
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bounds the graphics API. Full detail: `docs/PROGRESS_LOG.md §3`.
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## Displays
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- **2 video cards → 7 monitors:** main 3D view **800×600**; radar **640×480**; five monochrome MFDs
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driven as one **1280×480** horizontally-spanned surface. [T1]
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- Requires **old NVIDIA drivers** for the MFD horizontal spanning — a hard constraint that bounds
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the graphics API → **Target Direct3D 9** (lowest common denominator that runs on old-driver pods
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AND modern cards; one codepath). NOT Vulkan/D3D11+. CUDA is irrelevant (compute, not display). [T1]
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## Cockpit I/O (RIO)
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Joystick X/Y, throttle, pedals, buttons over **serial COM** (`L4RIO`, `L4SERIAL`). Must be remapped
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to keyboard/gamepad on a dev box; real wiring is a pod bring-up task (Phase 8). The engine is a PUSH
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model — `LBE4ControlsManager` groups are fed by all devices (RIO on the pod, DirectInput on dev);
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the `MechControlsMapper` interprets them ([[locomotion]]). [T2]
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### The button space + lamps [T0, L4CTRL.h enum]
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buttonGroup addresses 0x00-0x47: `AuxLowerRight/Left 1-8` (0x00-0x0F), `Secondary1-12` (0x10-0x1B),
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`AuxUpperCenter/Left/Right 1-8` (0x20-0x37; **0x30-0x37 = the target HOTBOX**, pilot select),
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icom/door 0x39-0x3C, `Panic` 0x3D (the config-mode lamp),
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`Throttle1` 0x3F (throttle-head = REVERSE THRUST), joystick cluster 0x40-0x47 (Main trigger 0x40,
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hat 0x41-0x44, Pinky/ThumbLow/ThumbHigh 0x45-0x47 — the four MAPPABLE fire buttons). "Lamp buttons"
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are literal: physical illuminated pushbuttons in panels around the screens; the RIO `LampRequest`
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protocol lights them (`MakeLinkedLamp`), reports burned-out bulbs (`RIODeadLamps` failure page,
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per-lamp names). A lit button = active. Keypads are NOT buttons: `keyboardGroup[KeyboardPilot/
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KeyboardExternal]` carry key VALUES ('0'-'9','A'-'F', L4CTRL.cpp:2526). RIO event convention:
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press = `buttonGroup[a].Update(a+1, modeMask)` (mask saved), release = `Update(-a-1, savedMask)`
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(L4CTRL.cpp:2470-2520).
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**Bank→MFD assignment (Gitea #9, from the streamed "L4" .CTL EventMapping dump [T1]):** each
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preset-able MFD owns the 8-button bank AROUND it, mode-mask-gated per page — **Mfd1 (lower
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left) = 0x08-0x0F (AuxLowerLeft), Mfd2 (upper center) = 0x20-0x27 (AuxUpperCenter), Mfd3
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(lower right) = 0x00-0x07 (AuxLowerRight)**: Quad page → the outer buttons direct-select the
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populated Eng pages; Eng page → one button back to Quad, the rest drive the shown subsystem
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(generator select A-D msg 4-7, gen mode msg 8, weapon configure msg 9; also **msg 0x3 =
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ToggleCooling — WIRED 2026-07-20**: the button→msg-3 route was always authored (`BT_CTRLMAP_LOG`
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shows ~a dozen `EVENT msg 0x3` entries, e.g. Eng-page aux `elem 0x21` mask-gated per ModeMFD page
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to each weapon), but was "silently dead" only for lack of the id-3 handler. Reconstructed
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`HeatSink::ToggleCoolingMessageHandler` (@004ad6f8) + restored the `PoweredSubsystem→HeatSink`
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handler chain, so the Eng-page "Coolant" button now toggles the shown weapon's coolant flow. msg
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0xb = ToggleSeekVoltage (energy) / EjectAmmo (ammo weapons) still unreconstructed). **Always-active records IDENTIFIED 2026-07-20 [T1]** (roster:
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sub 3 = Reservoir, 4-9 = Condenser1-6, 10-13 = GeneratorA-D): **0x2C = the COOLANT FLUSH
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button** (Reservoir InjectCoolant, hold-to-flush — works), **0x2F/0x2E/0x2D/0x2B/0x2A/0x29 =
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the per-condenser VALVE buttons** (MoveValve, Cond1-6 — work), **0x1A-0x1D = Generator A-D
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ON/OFF** (`ToggleGeneratorOnOff` id 4, binary table @0050fb90 fn @004b1ed0 — DEAD until
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reconstructed). Newly decoded from the binary message tables: **0x13 → Mech `DuckRequest`
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(0x1a @0049fa00 — the manual's CROUCH button)**, **0x28 → Mech `BalanceCoolant` (0x16
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@0049f728)**, 0x12 → ThermalSight toggle (id 3), **0x14 → Searchlight + Searchlight2
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`ToggleLamp` (id 3 @004b860c; body reconstructed but the handler-set is default-constructed
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EMPTY — unwired)** — all currently dead; an unhandled message is SILENTLY ignored
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(Receiver::Receive finds no handler and does nothing — dead buttons produce NO log).
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0x10/0x11 = map ZoomIn/Out, 0x15 = CycleDisplayMode, 0x18 = CycleControlMode (#6). Buttons
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with NO streamed mapping authored (authentically inert): 0x16/0x17/0x19/0x1E/0x1F/0x38-0x3E.
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Full decode: [[gauges-hud]] §preset pages; the complete 72-button census + verification:
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`docs/GLASS_COCKPIT.md` §2026-07-20.
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### Desktop input remap — CONTROLS.MAP + XInput (2026-07-18) [T2 live]
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`game/reconstructed/btinput.cpp` + `content/CONTROLS.MAP` (WASD-classic default, compiled-in twin;
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`content/CONTROLS_NUMPAD.MAP` = the corrected community numpad profile). Grammar: `key <name>
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button <addr>|axis <axis> deflect|rate <n>|keypad pilot|external <0-15>|pckey <char>|action
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<name>`; `pad <button>` same targets; `padaxis <src> axis ... [invert] [deadzone d] [rate n]`.
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Axes: Throttle (lever, rate-walks + sticks), LeftPedal/RightPedal/Pedals (turn, springs),
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JoystickX (torso twist), **JoystickY (torso ELEVATION — pitch aim; every 1995 control mode
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routes it to Torso::SetAnalogElevationAxis; keys R/F + pad LeftStickY in the default map;
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verified to the authentic VerticalLimitTop clamp, 20° on the Blackhawk; aims the GUNS — reads
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on the HUD elevation tape, the eyepoint stays level)**.
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**AXIS SIGN CONVENTION (2026-07-18, user-verified) [T1]:** the sim uses MATH convention —
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positive turnDemand / twist / free-aim slew is **CCW (LEFT)**. On the pod the RIO Ranger owned
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the hardware sign; the desktop key bridge negates ONCE per channel (`key_turn = -gBTDrive.turn`;
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`stickPosition.x = -gBTTwistAxis`; the SetFreeAimSlew call-sites pass the bridge value un-negated)
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so input-right = turn/twist RIGHT (manual p8: "pulling your joystick to the right torso twists
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your 'Mech to the right"). Forced/BT_GOTO harness demands are already sim-frame and stay
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un-negated. Lesson: large-rotation screenshot comparisons are AMBIGUOUS — trust tracked
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landmarks, numeric yaw telemetry with an established convention, or the user's live observation.
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Emissions mirror the RIO conventions above exactly; the four fire
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buttons (0x40/45/46/47) publish as levels to the bring-up fire channels instead of buttonGroup
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(avoids double-fire once the streamed ChooseButton mappings are exercised). XInput loads
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dynamically (xinput1_4 → 9_1_0; disconnected-pad probing rate-limited to 1 Hz). **Keys claimed by
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a binding are SUPPRESSED from the legacy WM_CHAR/KEYUP feed** (`BTInputSuppressKey`, hook at
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L4CTRL.cpp keyboard read) — this ended the historic DOUBLE-DISPATCH: 'w' drove AND selected pilot
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0; F5's key-up value 0x74 aliased to the 't' hotkey; letter key-ups (uppercase) fed the developer
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fake-event dispatcher. Unbound keys keep their authentic 1995 dispatcher meaning (reachable from
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any key via `pckey`). The old dual-use 'V' (view toggle + look-behind) is split: V = ViewToggle,
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B = LookBehind. Verified live: bindings load, W/NumPad8 drive (spd rises), X all-stop, aux-button
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emission ([input] 0x2f PRESS), suppression both directions ('r' delivered / 'w' swallowed),
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full-keyspace WM_CHAR+WM_KEYUP fuzz survived. Diag: `BT_INPUT_LOG`.
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### The pod throttle is ANALOG-CONTINUOUS, not notched (verified end-to-end) [T1]
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The authentic pod throttle path — traced 2026-07 (task #50 throttle-fidelity question):
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1. **Hardware → RIO:** serial `AnalogReply` packet → `Ranger("Throttle", 0, 800, .05)` — raw counts
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0–800, 5% deadband, auto-ranging offset, output a CONTINUOUS Scalar; the sign is inverted
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("Throttle counts BACKWARDS", `engine/MUNGA_L4/L4RIO.cpp:1374-1377`, Ranger @L4RIO.cpp:461-701).
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No quantization/notching anywhere in `Ranger::Update`.
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2. **Manager:** `LBE4ControlsManager::Execute` → `scalarGroup[ScalarThrottle].Update(&rioPointer->
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Throttle, mode_mask)` on every AnalogReply (`L4CTRL.cpp:1379-1382`). ScalarThrottle = index 0 →
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manager+0x24 (scalarGroup base 0x24, 0x20/entry; buttonGroup base 0x1c0, keyboardGroup 0x160).
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3. **Streamed `.CTL` mapping (the "handled elsewhere"):** `MechRIOMapper`'s ctor @004d266c binds NO
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throttle — the bind comes from the type-19 `ControlMappingStream` resource named **"L4"** (child
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of the per-mech type-6 `ControlMappingsList`; installed by `BTL4APP MakeViewpointEntity` via
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`CreateStreamedMappings` @0047703c). BTL4.RES "L4" record [1]:
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`Scalar Throttle → subsystemID 0 (ControlsMapper slot), DirectMapping, attr 4, mask 0xffffffff`.
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Attr 4 = "ThrottlePosition" @ mapper+0x11c (binary IndexEntry table @0050efd8: id 4 → offset
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0x11d-1 = 0x11c, name "ThrottlePosition" @0050f28f). Reverse = record [2]: `Button Throttle1
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(0x3F, on the throttle handle) → attr 6 ReverseThrust@0x124`. Turn = pedals value-bound in the
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ctor (manager+0x44/+0x64 → mapper+0x1b4/+0x1b8).
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**Step-2a fix (2026-07-17) [T2]:** these ids are POSITIONAL (`Find(id)` = `index[id-1]`) and
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our `MechControlsMapper` chain started one low (`Subsystem::NextAttributeID`==2 vs the
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binary's 3) — every streamed record landed one member late (a real-pod landmine: the RIO
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throttle scalar drove `pedalsPosition`). Ids are now PINNED to the binary numbering with an
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id-2 pad + `static_assert` locks (`mechmppr.hpp/.cpp`); audit tool `BT_CTRLMAP_LOG=1`.
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Details: `docs/GLASS_COCKPIT.md` §2a; see [[glass-cockpit]].
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4. **Interpretation:** `L4MechControlsMapper::InterpretControls` @004d196c applies the ONLY software
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detent — snap to 1.0 when |t−1.0| ≤ 0.05 — then `MechControlsMapper::InterpretControls` @004afd10
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computes `speedDemand@0x128 = maxSpeed(mech+0x34c) × throttlePosition(0x11c) × scale(mech+0x5c0)`
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(forward) or `−maxSpeed × throttlePosition` (reverse flag 0x124).
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**Consequence:** the original pod produced a continuously varying speedDemand while the lever moved
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(updated per serial AnalogReply, NOT per render frame). There are NO "5 throttle notches" anywhere
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in the software path. (Keyboard keys '1'-'5' in @004d1bf0 set controls-manager MODE masks; the
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'+'/'-' pair steps a [0,5] value that drives `pow(2,x)` into mech+0x404 = HUD zoom 1×–32× — neither
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is a speed setting.) The mech's `throttleState@0x4a4` writer remains un-exported (likely in the
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0x4a9b5a–0x4ab188 gap) — [[open-questions]].
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**MECHANICAL-notch hypothesis (2026-07-16) [T4, hardware]:** the "5 speeds" pod lore may still be
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true — as detents in the throttle QUADRANT hardware, invisible to the software (the pot reads
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continuous counts regardless of where the lever mechanically rests). Independent corroboration
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from the gait math ([[locomotion]]): the gait SM has NO stable state for a demand between the walk
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cap (`walkStrideLength`@0x534) and the run engage speed (`reverseSpeedMax`@0x538, the walk→run
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transition clip's exit speed) — a demand PARKED in that band hunts walk→shift-up→shift-down
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forever, firing the authored EngineShiftFwd/Rev sounds each swing (binary-verified, all-authentic
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data: Blackhawk band = demand 22.02–30.87 = throttle 36–50%). A design like that only ships if the
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hardware discourages parking in the band. Port accommodation: the keyboard lever snaps out of the
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dead band AT REST (`mech4.cpp` "GAIT DETENT"; sweeping through while held stays continuous =
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authentic moving lever). Ask Nick: did the pod throttle quadrant have mechanical detents
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(how many / positions)? — [[open-questions]].
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## Multi-surface gauge path (intact, pod-only by default)
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The pod multi-surface path EXISTS and is intact: `DPLRenderer::FindBestAdapterIndices` (multi-
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adapter selector, honors PRIMGAUGE/SECGAUGE/MFDGAUGE/SPANDISABLE), `SVGA16::BuildWindows` (a
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fullscreen D3D device + window per gauge/MFD surface, MFD span = width×2), `L4GaugeRenderer` (gated
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on `L4GAUGE`). `content/SETENV.BAT` is the authentic pod env preset (L4CONTROLS=RIO,KEYBOARD;
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L4GAUGE=640x480x16; L4PLASMA=com2). [T2]
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## Platform profile switch
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`-platform pod|dev` (or `BT_PLATFORM` env; default DEV) selects a runtime env preset WITHOUT forking
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the codepath. **DEV** = keyboard + single 800×600 window. **POD** = RIO input (keyboard fallback off
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serial) + multi-surface gauges (from SETENV.BAT/L4GAUGE on real hardware). `-platform pod` does NOT
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auto-enable L4GAUGE (each surface needs its own fullscreen device on the pod's 2 cards). Off-pod, the
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6 MFD surfaces render in a dev window via `BT_DEV_GAUGES` ([[gauges-hud]]). [T2]
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## MFD surface model
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All cockpit surfaces are bit-plane MASKS over ONE shared `SVGA16` pixelBuffer: `sec`=palette low
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byte; `Heat`=0x4000, `Mfd2`=0x0400, `Comm`=0x8000, `Mfd1`=0x0100, `Mfd3`=0x1000; `Eng1-3` =
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engineering-mode alt planes; `overlay`=0x00C0 (shares the sec surface). See [[gauges-hud]]. [T2]
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## The 1995 player manual — alignment audit (2026-07-18) [T1, primary source]
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`reference/manual/Tesla40_BT_manual.pdf` (34pp, from Nick). CONFIRMS the reconstruction on
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every checked control behavior:
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- **Control modes are named BAS / MID / ADV** (basic/middle/advanced; our Basic/Standard/Veteran
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names came from the RP analog — mechanics identical): BAS = joystick turns the mech, pedals
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inactive, NO torso twist; MID = pedals turn + auto-slow for tightest radius, joystick = torso;
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ADV = as MID but NO auto-slow (wider radius at speed) — exactly our mapper's turn-clamp
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difference. Mode button = top right of the secondary screen.
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- **Stick right = torso right** in MID/ADV (p8) — the corrected sign. **Blackhawk and Owens are
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the fixed-torso exceptions** (named in print!); twist arc "about 120°" (per-mech: Loki/Thor
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tables say Torso Limit 110°, Torso speed 60°/s).
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- **Throttle is a continuous lever** (push=accelerate, pull=stop; inertia); **reverse = HOLD the
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red throttle button** (release = forward) — our 0x3F hold-state model.
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- **Hot Box Selector MFD** = callsign buttons + a **CLOSEST** button (lower right = our hotbox
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button 8 → ChooseNearestPilot); radar = travel-oriented, 60° vision wedge sweeps with twist,
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red hot box + callsign on contacts; **map zoom ± buttons** flank the secondary screen.
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- **Experience gates the hunting aids**: viewscreen hot box + hunting-guide arrow appear in
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STANDARD sim mode only (not veteran/expert); expert mode adds movement heat. (2026-07-18 [T1]:
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4.0→4.10 drift — in OUR 4.10 binary the HUD reads NO experience flag (hotbox/arrows are
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lock-gated in every mode) and movement heat is veteran+expert; full wiring in
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[[experience-levels]].)
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- Cockpit: 5 MFDs (Coolant UL, Engineering top, Hot Box UR, Weapon ×2) + secondary screen with
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side button columns + **EJECT button** beside the joystick + per-mech COOLANT LOOP tables
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(weapons+generators per loop 1-6) and stat sheets (tonnage/armor/reservoir liters/heat
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sinks/top speeds incl. "Super Charged").
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NEW LEADS (manual describes, port lacks input/UI): **CROUCH** (button by the secondary screen;
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`Mech::duckState` attr 0x37 + SQUAT clips exist, nothing drives them), **EJECT** (sounds exist:
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EjectButton01_z*.wav), hot-box viewscreen framing (the deferred PNAME marker chain). Per-mech
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stat tables = a systematic cross-check source for our streamed subsystem resources.
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### Coolant-loop cross-check RESULT (2026-07-18) [T1] -- STRUCTURE strongly faithful
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Dumped each mech's subsystem->loop (subsystem's linked-condenser number, `BTCoolingLoopFrame`)
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and diffed vs the manual's COOLANT LOOPS tables. The 4.0->4.10 drift shows here too, but the
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STRUCTURE is remarkably intact:
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- **Backbone identical on ALL 6 mechs:** Generator A/B/C/D on loops 1/2/3/5, **Sensors** (our
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"Avionics") on loop 2, **Myomers** on loop 5, LRMs on loops 1&3, autocannon on loop 4, the
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large energy weapon on loop 6 -- match the manual exactly.
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- **Weapon LOADOUT identical on 5 of 6** (Thor, Vulture, MadCat, Owens, Blackhawk carry the exact
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same weapon set 4.0->4.10). **Loki is the one full rework** (4.0 PPC x2 / AFC100 / SRM6 / Medium
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Laser -> 4.10 AFC50 x2 / ER Medium x2 / SRM4).
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- **The consistent 4.0->4.10 change:** the small energy weapons were REDISTRIBUTED across loops --
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the 2 ER Small Lasers moved off the sensor/heavy loops (4.0) onto the energy-weapon loops 4&6
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(4.10) on Thor/MadCat/Vulture; SRM/laser placement reshuffled on Blackhawk. Owens is a
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near-PERFECT match (loops 1&3 exact; only a 4.0 "second myomer set" on loop 2 is absent).
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- **`Loop 0` = correctly UNCOOLED infrastructure** (condensers, reservoir, gyro, torso, HUD,
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searchlight, thermal sight, ammo bins, message manager, mechtech, controls mapper) -- not a loop.
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CONCLUSION: the coolant-loop reconstruction is faithful; every difference is 4.0->4.10 tuning
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(loadout rework on Loki, small-laser redistribution elsewhere), NOT a bug. `BT_SPEC_LOG` (mech4)
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re-dumps on demand.
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## Key Relationships
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- Renders: [[gauges-hud]] (the MFD surfaces), [[rendering]] (the main 3D view).
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- Input: [[locomotion]] (the mapper).
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- Bring-up: Phase 8 (get pod specifics from Nick — [[open-questions]]).
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