BT410 5.3.119: the master gate comes home -- 0xC/0x100 decoded as the engine's own enums, and every [T2] mirror retired

The 'mysterious flag pair' gating every master-only registration was never
BT-specific state waiting on unreconstructed stream builders. It is the
Entity base itself: InstanceBits=2 puts the instance field at mask 0xC
(ReplicantInstance=4), DynamicBit=8 makes DynamicFlag 0x100 -- so the
binary's (flags & 0xC)==0 && (flags & 0x100)!=0 reads 'a master-instance
dynamic entity', spelled MasterInstance + DynamicFlag in the 1995 headers.
Mover::DefaultFlags = DynamicFlag|MasterInstance, ENTITY.CPP:978 seeds
simulationFlags from the MakeMessage's instanceFlags, and our spawn recipe
has passed Mech::DefaultFlags since the boot ladder -- the authentic gate
was live all along. The BT411 donor's 'MasterHeatSinkFlag' name was a
fabrication that made an engine constant look like a missing subsystem
feature (donor drift #12).

Eleven sites flip from the GetInstance() mirror to the binary pair: the
heat-family registrations (x4), powersub (x3), gyro, hud, myomers,
emitter, and the Torso ctor's master/copy selection (@004b6b0c verbatim,
isDamagedCopy set in both branches). The MECHWEAP score-post and MECH view
gates are different families and stay as they are.

Statically proven (DefaultFlags carries both bits) and mission-soaked
clean. No [T2] divergence markers remain in the tree.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

restoration/source410/BT/EMITTER.CPP

@@ -194,7 +194,14 @@ Emitter::Emitter(
 	// updates / ServiceDischarge instead -- that path joins the network wave.)
 	//
 	weaponAlarm.SetLevel(LoadingState);
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&Emitter::EmitterSimulation);
 	}

restoration/source410/BT/GYRO.CPP

@@ -120,7 +120,14 @@ Gyroscope::Gyroscope(
 	//
 	// The master instance runs the gyro per-frame.
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&Gyroscope::GyroscopeSimulation);
 	}

restoration/source410/BT/HEAT.CPP

@@ -418,7 +418,14 @@ HeatSink::HeatSink(
 	// the weapons) override with their own Performance in their ctors, each of
 	// which chains this step.
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&HeatSink::HeatSinkSimulation);
 	}
@@ -875,7 +882,14 @@ HeatWatcher::HeatWatcher(
 	// the segment-copy mask + the master flag; our tree's established
 	// equivalent is the replicant test every sibling ctor uses).
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&HeatWatcher::WatchSimulation);
 	}
@@ -1045,7 +1059,14 @@ Condenser::Condenser(
 	//
 	// Install the per-frame refrigeration Performance.
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&Condenser::RefrigerationSimulation);
 	}
@@ -1226,7 +1247,14 @@ AggregateHeatSink::AggregateHeatSink(
 			<< " conductance=" << thermalConductance << endl << flush;
 	}
 
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&AggregateHeatSink::RadiatorSimulation);
 	}

restoration/source410/BT/HUD.CPP

@@ -84,7 +84,14 @@ HUD::HUD(
 		//
 	// The master instance runs the HUD per-frame.
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&HUD::HudSimulation);
 	}

restoration/source410/BT/MYOMERS.CPP

@@ -111,7 +111,14 @@ Myomers::Myomers(
 	// The master instance runs the myomer per-frame (the same gate every
 	// sibling uses; the binary's is the segment-copy/master flag pair).
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&Myomers::MyomersSimulation);
 	}

restoration/source410/BT/POWERSUB.CPP

@@ -167,7 +167,14 @@ PoweredSubsystem::PoweredSubsystem(
 	// simulation.  Derived subsystems (the weapons, Sensor, ...) override with
 	// their own Performance in their ctors, each of which chains this step.
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&PoweredSubsystem::PoweredSubsystemSimulation);
 	}
@@ -665,7 +672,14 @@ Generator::Generator(
 	//
 	// Install the generator's per-frame electrical Performance.
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&Generator::GeneratorSimulation);
 	}
@@ -797,7 +811,14 @@ PowerWatcher::PowerWatcher(
 		//
 	// Install the per-frame watchdog on the master instance.
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	// The binary's master gate: MasterInstance + DynamicFlag -- the
+	// simulationFlags 0xC/0x100 pair, now decoded as engine enum identities
+	// (InstanceBits=2 makes InstanceMask 0xC; DynamicBit=8 makes DynamicFlag
+	// 0x100; Entity::DefaultFlags carries both, seeded from the MakeMessage).
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
 		SetPerformance(&PowerWatcher::Simulation);
 	}

restoration/source410/BT/TORSO.CPP

@@ -87,7 +87,6 @@ Torso::Torso(
 	Check(owner);
 	Check_Pointer(r);
 
-	isDamagedCopy	= (owner->GetInstance() == Entity::ReplicantInstance);
 
 	statusFlags					= 0;
 	buttonAccelerationPerSecond	= r->buttonAccelerationPerSecond;
@@ -168,19 +167,25 @@ Torso::Torso(
 	lastUpdateTime	= 0L;
 
 	//
-	// Install the per-frame Performance.  The binary's gate @004b6b0c is
+	// Install the per-frame Performance -- the binary's gate @004b6b0c
-	// (owner->simulationFlags & 0xC) == 0 && (owner->simulationFlags & 0x100)
+	// verbatim: (flags & 0xC) == 0 && (flags & 0x100) != 0, which decodes to
-	// != 0 -- the master-segment flag pair seeded by the mech stream builders,
+	// the engine's own MasterInstance + DynamicFlag (InstanceBits=2 puts the
-	// which are not reconstructed yet.  [T2] Until they land, the whole
+	// instance field at mask 0xC with ReplicantInstance=4; DynamicBit=8 is
-	// watcher family mirrors that gate with the instance test (same sites:
+	// 0x100).  Entity::DefaultFlags = DynamicFlag|MasterInstance and the
-	// heat.cpp / powersub.cpp / gyro.cpp registrations); revisit together.
+	// engine seeds simulationFlags from the MakeMessage, so the gate is live
+	// with no stream-builder dependency.  [T2 RETIRED 5.3.119.]
 	//
-	if (owner->GetInstance() != Entity::ReplicantInstance)
+	if (
+		(owner->simulationFlags & Entity::InstanceMask) == Entity::MasterInstance &&
+		(owner->simulationFlags & Entity::DynamicFlag) != 0
+	)
 	{
+		isDamagedCopy = 0;
 		SetPerformance(&Torso::TorsoSimulation);
 	}
 	else
 	{
+		isDamagedCopy = 1;
 		SetPerformance(&Torso::TorsoCopySimulation);	// binary PTR @00510c1c
 	}
 

restoration/source410/BT/TORSO.NOTES.md

@@ -75,10 +75,15 @@ Members carved from `dynamicsState[16]` → `[12]`: `targetTwist` @0x218,
 `twistAtUpdate` @0x21C, `twistRate` @0x238, `lastUpdateTime` @0x254 (`Time`,
 init `0L` — plain `0` is ambiguous between the long/float assignment operators
 under BC4.52).  Ctor now registers the copy Performance on replicants
-(binary PTR @00510c1c).  [T2] The registration gate mirrors the binary's
+(binary PTR @00510c1c).  [T2 RETIRED 5.3.119] The gate is now the binary's
-`(owner->simulationFlags & 0xC) == 0 && (flags & 0x100) != 0` with the
+own pair, decoded as engine enum identities: `(flags & 0xC)` is the Entity
-instance test, consistent with the whole watcher family, until the mech
+INSTANCE field (InstanceBits=2, ReplicantInstance=4) and `0x100` is
-stream builders (which seed those flag bits) are reconstructed.
+Entity::DynamicFlag (DynamicBit=8).  Mover::DefaultFlags =
+DynamicFlag|MasterInstance and ENTITY.CPP seeds simulationFlags from the
+MakeMessage's instanceFlags, so the authentic gate was live all along --
+no stream-builder dependency existed, and the BT411 donor's
+"MasterHeatSinkFlag" name was a fabrication.  The whole registration
+family (heat x4, powersub x3, gyro, hud, myomers, emitter) flipped with it.
 
 **Staged feeders**: `Read/WriteUpdateRecord` (the census remainder in this TU)
 stamp `twistAtUpdate`/`twistRate`/`lastUpdateTime` from console updates.