source410: engine COMPLETE (165/165) - link reaches PE emission; deep ledger cut

The tlink32 campaign after the checkpoint: eleven engine bodies back-dated
from BT412 (rotation player team explode dropzone terrain cultural receiver
subsystm app l4gauge - the Application core included), the WinTesla-ectomy
handled by backdate.py's new unwrap rules (accessor-fn statics -> 1995 static
objects, decl rewrites, pointer->reference Derivation ctor, 2007 windowed-
gauge/console-marshal/idle-pump excisions), staged statics TUs opened for the
game classes (MECH/BTPLAYER/BTDIRECT/PROJTILE/MISSILE/BTL4MPPR .CPP + L4APP/
NETWORK engine statics).

State: every compiled symbol short of the shallow graph RESOLVED (the 52- and
17-symbol ledgers burned to zero); with 32stub.exe in place the linker reaches
full vtable closure and emits the deep ledger (~210 symbols, UNRESOLVED-
LEDGER.txt): remaining engine bodies (objstrm cstr gauge/gaugrend graphics
pixelmap palette resfile ray scnrole explosion-table), the DOS driver extern
layer (_SVGA*/_PCSerial*/_PCSPAK*/joystick/netnub/sosMIDI), the full L4App
body, and the real game-TU frontier (Mech::Make et al.). Recipe proven for
every category.

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

restoration/source410/BT_L4/BTL4MPPR.CPP

@@ -0,0 +1,42 @@
+//===========================================================================//
+// Project: BattleTech                                                       //
+//---------------------------------------------------------------------------//
+// Copyright (C) 1995, Virtual World Entertainment, Inc.                     //
+// All Rights reserved worldwide                                             //
+// This unpublished sourcecode is PROPRIETARY and CONFIDENTIAL               //
+//===========================================================================//
+
+#include <bt.hpp>
+#pragma hdrstop
+
+#if !defined(BTL4MPPR_HPP)
+#	include <btl4mppr.hpp>
+#endif
+
+Derivation
+	MechThrustmasterMapper::ClassDerivations(
+		Subsystem::ClassDerivations,
+		"MechThrustmasterMapper"
+	);
+
+MechThrustmasterMapper::SharedData
+	MechThrustmasterMapper::DefaultData(
+		MechThrustmasterMapper::ClassDerivations,
+		Subsystem::MessageHandlers,
+		Subsystem::AttributeIndex,
+		1
+	);
+
+Derivation
+	MechRIOMapper::ClassDerivations(
+		Subsystem::ClassDerivations,
+		"MechRIOMapper"
+	);
+
+MechRIOMapper::SharedData
+	MechRIOMapper::DefaultData(
+		MechRIOMapper::ClassDerivations,
+		Subsystem::MessageHandlers,
+		Subsystem::AttributeIndex,
+		1
+	);