(svn r15216) -Feature: native support for Transport Tycoon (Original) savegames. Based on SVXConverter's source code and documentation by Roman Vetter

1 files changed, 1806 insertions, 0 deletions

diff --git a/src/saveload/oldloader_sl.cpp b/src/saveload/oldloader_sl.cpp
new file mode 100644
index 000000000..0b449ca90
--- /dev/null
+++ b/src/saveload/oldloader_sl.cpp
@@ -0,0 +1,1806 @@
+/* $Id$ */
+
+/** @file oldloader_sl.cpp Chunks and fix-ups for TTO/TTD/TTDP savegames. TTO loader code is based on SVXConverter by Roman Vetter. */
+
+#include "../stdafx.h"
+#include "../station_map.h"
+#include "../town.h"
+#include "../industry.h"
+#include "../company_func.h"
+#include "../aircraft.h"
+#include "../roadveh.h"
+#include "../ship.h"
+#include "../train.h"
+#include "../signs_base.h"
+#include "../debug.h"
+#include "../depot_base.h"
+#include "../newgrf_config.h"
+#include "../zoom_func.h"
+#include "../date_func.h"
+#include "../vehicle_func.h"
+#include "../variables.h"
+#include "../strings_func.h"
+#include "../effectvehicle_base.h"
+#include "../string_func.h"
+#include "../core/mem_func.hpp"
+#include "../core/alloc_type.hpp"
+#include "saveload_internal.h"
+#include "oldloader.h"
+
+#include "table/strings.h"
+#include "../table/engines.h"
+
+static bool   _read_ttdpatch_flags;
+
+static uint8  *_old_map3;
+
+void FixOldMapArray()
+{
+	/* TTO/TTD/TTDP savegames could have buoys at tile 0
+	 * (without assigned station struct) */
+	MemSetT(&_m[0], 0);
+	SetTileType(0, MP_WATER);
+	SetTileOwner(0, OWNER_WATER);
+}
+
+static void FixTTDMapArray()
+{
+	/* _old_map3 is moved to _m::m3 and _m::m4 */
+	for (TileIndex t = 0; t < OLD_MAP_SIZE; t++) {
+		_m[t].m3 = _old_map3[t * 2];
+		_m[t].m4 = _old_map3[t * 2 + 1];
+	}
+
+	for (TileIndex t = 0; t < OLD_MAP_SIZE; t++) {
+		switch (GetTileType(t)) {
+			case MP_STATION:
+				_m[t].m4 = 0; // We do not understand this TTDP station mapping (yet)
+				switch (_m[t].m5) {
+					/* We have drive through stops at a totally different place */
+					case 0x53: case 0x54: _m[t].m5 += 170 - 0x53; break; // Bus drive through
+					case 0x57: case 0x58: _m[t].m5 += 168 - 0x57; break; // Truck drive through
+					case 0x55: case 0x56: _m[t].m5 += 170 - 0x55; break; // Bus tram stop
+					case 0x59: case 0x5A: _m[t].m5 += 168 - 0x59; break; // Truck tram stop
+					default: break;
+				}
+				break;
+
+			case MP_RAILWAY:
+				/* We save presignals different from TTDPatch, convert them */
+				if (GB(_m[t].m5, 6, 2) == 1) { // RAIL_TILE_SIGNALS
+					/* This byte is always zero in TTD for this type of tile */
+					if (_m[t].m4) { // Convert the presignals to our own format
+						_m[t].m4 = (_m[t].m4 >> 1) & 7;
+					}
+				}
+				/* TTDPatch stores PBS things in L6 and all elsewhere; so we'll just
+				 * clear it for ourselves and let OTTD's rebuild PBS itself */
+				_m[t].m4 &= 0xF; // Only keep the lower four bits; upper four is PBS
+				break;
+
+			case MP_WATER:
+				/* if water class == 3, make river there */
+				if (GB(_m[t].m3, 0, 2) == 3) {
+					SetTileType(t, MP_WATER);
+					SetTileOwner(t, OWNER_WATER);
+					_m[t].m2 = 0;
+					_m[t].m3 = 2; // WATER_CLASS_RIVER
+					_m[t].m4 = Random();
+					_m[t].m5 = 0;
+				}
+				break;
+
+			default:
+				break;
+		}
+	}
+
+	FixOldMapArray();
+}
+
+extern uint32 GetOldTownName(uint32 townnameparts, byte old_town_name_type);
+
+void FixOldTowns()
+{
+	Town *town;
+
+	/* Convert town-names if needed */
+	FOR_ALL_TOWNS(town) {
+		if (IsInsideMM(town->townnametype, 0x20C1, 0x20C3)) {
+			town->townnametype = SPECSTR_TOWNNAME_ENGLISH + _settings_game.game_creation.town_name;
+			town->townnameparts = GetOldTownName(town->townnameparts, _settings_game.game_creation.town_name);
+		}
+	}
+}
+
+StringID *_old_vehicle_names;
+
+void FixOldVehicles()
+{
+	Vehicle *v;
+
+	FOR_ALL_VEHICLES(v) {
+		/* For some reason we need to correct for this */
+		switch (v->spritenum) {
+			case 0xfd: break;
+			case 0xff: v->spritenum = 0xfe; break;
+			default:   v->spritenum >>= 1; break;
+		}
+
+		/* Vehicle-subtype is different in TTD(Patch) */
+		if (v->type == VEH_EFFECT) v->subtype = v->subtype >> 1;
+
+		v->name = CopyFromOldName(_old_vehicle_names[v->index]);
+
+		/* We haven't used this bit for stations for ages */
+		if (v->type == VEH_ROAD &&
+				v->u.road.state != RVSB_IN_DEPOT &&
+				v->u.road.state != RVSB_WORMHOLE) {
+			ClrBit(v->u.road.state, RVS_IS_STOPPING);
+		}
+
+		/* The subtype should be 0, but it sometimes isn't :( */
+		if (v->type == VEH_ROAD || v->type == VEH_SHIP) v->subtype = 0;
+
+		/* Sometimes primary vehicles would have a nothing (invalid) order
+		 * or vehicles that could not have an order would still have a
+		 * (loading) order which causes assertions and the like later on.
+		 */
+		if (!IsCompanyBuildableVehicleType(v) ||
+				(v->IsPrimaryVehicle() && v->current_order.IsType(OT_NOTHING))) {
+			v->current_order.MakeDummy();
+		}
+
+		/* Shared orders are fixed in AfterLoadVehicles now */
+	}
+}
+
+static bool FixTTOMapArray()
+{
+	for (TileIndex t = 0; t < OLD_MAP_SIZE; t++) {
+		TileType tt = GetTileType(t);
+
+		switch (tt) {
+			case MP_CLEAR:
+				break;
+
+			case MP_RAILWAY:
+			case 11: // monorail
+				if (tt == 11) {
+					_m[t].m3 = 1; // rail type = monorail
+					_m[t].type_height &= 0x1F; // -> MP_RAILWAY
+					_m[t].m2 = 1; // set monorail ground to RAIL_GROUND_GRASS
+				}
+				switch (GB(_m[t].m5, 6, 2)) {
+					case 0: // RAIL_TILE_NORMAL
+						break;
+					case 1: // RAIL_TILE_SIGNALS
+						_m[t].m4 = (~_m[t].m5 & 1) << 2;        // signal variant (present only in OTTD)
+						SB(_m[t].m2, 6, 2, GB(_m[t].m5, 3, 2)); // signal status
+						_m[t].m3 |= 0xC0;                       // both signals are present
+						_m[t].m5 = HasBit(_m[t].m5, 5) ? 2 : 1; // track direction (only X or Y)
+						_m[t].m5 |= 0x40;                       // RAIL_TILE_SIGNALS
+						break;
+					case 3: // RAIL_TILE_DEPOT
+						_m[t].m2 = 0;
+						break;
+					default:
+						return false;
+				}
+				break;
+
+			case MP_ROAD: // road (depot) or level crossing
+				switch (GB(_m[t].m5, 4, 4)) {
+					case 0: // ROAD_TILE_NORMAL
+						if (_m[t].m2 == 4) _m[t].m2 = 5; // 'small trees' -> ROADSIDE_TREES
+						break;
+					case 1: // ROAD_TILE_CROSSING (there aren't monorail crossings in TTO)
+						_m[t].m3 = _m[t].m1; // set owner of road = owner of rail
+						break;
+					case 2: // ROAD_TILE_DEPOT
+						break;
+					default:
+						return false;
+				}
+				break;
+
+			case MP_HOUSE:
+				_m[t].m3 = _m[t].m2 & 0xC0;    // construction stage
+				_m[t].m2 &= 0x3F;              // building type
+				if (_m[t].m2 >= 5) _m[t].m2++; // skip "large office block on snow"
+				break;
+
+			case MP_TREES:
+				_m[t].m3 = GB(_m[t].m5, 3, 3); // type of trees
+				_m[t].m5 &= 0xC7;              // number of trees and growth status
+				break;
+
+			case MP_STATION:
+				_m[t].m3 = (_m[t].m5 >= 0x08 && _m[t].m5 <= 0x0F) ? 1 : 0; // monorail -> 1, others 0 (rail, road, airport, dock)
+				if (_m[t].m5 >= 8) _m[t].m5 -= 8; // shift for monorail
+				if (_m[t].m5 >= 0x42) _m[t].m5++; // skip heliport
+				break;
+
+			case MP_WATER:
+				_m[t].m3 = _m[t].m2 = 0;
+				break;
+
+			case MP_VOID:
+				_m[t].m2 = _m[t].m3 = _m[t].m5 = 0;
+				break;
+
+			case MP_INDUSTRY:
+				_m[t].m3 = 0;
+				switch (_m[t].m5) {
+					case 0x24: // farm silo
+						_m[t].m5 = 0x25;
+						break;
+					case 0x25: case 0x27: // farm
+					case 0x28: case 0x29: case 0x2A: case 0x2B: // factory
+						_m[t].m5--;
+						break;
+					default:
+						if (_m[t].m5 >= 0x2C) _m[t].m5 += 3; // iron ore mine, steel mill or bank
+						break;
+				}
+				break;
+
+			case MP_TUNNELBRIDGE:
+				if (HasBit(_m[t].m5, 7)) { // bridge
+					byte m5 = _m[t].m5;
+					_m[t].m5 = m5 & 0xE1; // copy bits 7..5, 1
+					if (GB(m5, 1, 2) == 1) _m[t].m5 |= 0x02; // road bridge
+					if (GB(m5, 1, 2) == 3) _m[t].m2 |= 0xA0; // monorail bridge -> tubular, steel bridge
+					if (!HasBit(m5, 6)) { // bridge head
+						_m[t].m3 = (GB(m5, 1, 2) == 3) ? 1 : 0; // track subtype (1 for monorail, 0 for others)
+					} else { // middle bridge part
+						_m[t].m3 = HasBit(m5, 2) ? 0x10 : 0;  // track subtype on bridge
+						if (GB(m5, 3, 2) == 3) _m[t].m3 |= 1; // track subtype under bridge
+						if (GB(m5, 3, 2) == 1) _m[t].m5 |= 0x08; // set for road/water under (0 for rail/clear)
+					}
+				} else { // tunnel entrance/exit
+					_m[t].m2 = 0;
+					_m[t].m3 = HasBit(_m[t].m5, 3); // monorail
+					_m[t].m5 &= HasBit(_m[t].m5, 3) ? 0x03 : 0x07 ; // direction, transport type (== 0 for rail)
+				}
+				break;
+
+			case MP_UNMOVABLE:
+				_m[t].m2 = 0;
+				_m[t].m3 = 0;
+				break;
+
+			default:
+				return false;
+
+		}
+	}
+
+	FixOldMapArray();
+
+	return true;
+}
+
+static Engine *_old_engines;
+
+static bool FixTTOEngines()
+{
+	/** TTD->TTO remapping of engines; 255 means there is no equivalent. SVXConverter uses (almost) the same table. */
+	static const EngineID ttd_to_tto[] = {
+		  0, 255, 255, 255, 255, 255, 255, 255,   5,   7,   8,   9,  10,  11,  12,  13,
+		255, 255, 255, 255, 255, 255,  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,
+		25,   26,  27,  28,  29,  30, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+		255, 255, 255, 255, 255, 255, 255,  31, 255,  32,  33,  34,  35,  36,  37,  38,
+		 39,  40,  41,  42, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+		255, 255, 255, 255,  44,  45,  46, 255, 255, 255, 255,  47,  48, 255,  49,  50,
+		255, 255, 255, 255,  51,  52, 255,  53,  54, 255,  55,  56, 255,  57,  58, 255,
+		 59,  60,   255,61,  62, 255,  63,  64, 255,  65,  66, 255, 255, 255, 255, 255,
+		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,  67,  68,  69,  70,
+		 71, 255, 255,  76,  77, 255, 255,  78,  79,  80,  81,  82,  83,  84,  85,  86,
+		 87,  88,  89,  90,  91,  92,  93,  94,  95,  96,  97,  98,  99, 100, 101, 255,
+		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 102, 255, 255
+	};
+
+	/** TTO->TTD remapping of engines. SVXConverter uses the same table. */
+	static const EngineID tto_to_ttd[] = {
+		  0,   0,   8,   8,   8,   8,   8,   9,  10,  11,  12,  13,  14,  15,  15,  22,
+		 23,  24,  25,  26,  27,  28,  29,  30,  31,  32,  33,  34,  35,  36,  37,  55,
+		 57,  58,  59,  60,  61,  62,  63,  64,  65,  66,  67, 116, 116, 117, 118, 123,
+		124, 126, 127, 132, 133, 135, 136, 138, 139, 141, 142, 144, 145, 147, 148, 150,
+		151, 153, 154, 204, 205, 206, 207, 208, 211, 212, 211, 212, 211, 212, 215, 216,
+		217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232,
+		233, 234, 235, 236, 237, 238, 253
+	};
+
+	Vehicle *v;
+	FOR_ALL_VEHICLES(v) {
+		if (v->engine_type >= lengthof(tto_to_ttd)) return false;
+		v->engine_type = tto_to_ttd[v->engine_type];
+	}
+
+	/* Load the default engine set. Many of them will be overriden later */
+	uint j = 0;
+	for (uint i = 0; i < lengthof(_orig_rail_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_TRAIN, i);
+	for (uint i = 0; i < lengthof(_orig_road_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_ROAD, i);
+	for (uint i = 0; i < lengthof(_orig_ship_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_SHIP, i);
+	for (uint i = 0; i < lengthof(_orig_aircraft_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_AIRCRAFT, i);
+
+	Date aging_date = min(_date + DAYS_TILL_ORIGINAL_BASE_YEAR, ConvertYMDToDate(2050, 0, 1));
+
+	for (EngineID i = 0; i < 256; i++) {
+		int oi = ttd_to_tto[i];
+		Engine *e = GetTempDataEngine(i);
+
+		if (oi == 255) {
+			/* Default engine is used */
+			_date += DAYS_TILL_ORIGINAL_BASE_YEAR;
+			StartupOneEngine(e, aging_date);
+			e->intro_date -= DAYS_TILL_ORIGINAL_BASE_YEAR;
+			_date -= DAYS_TILL_ORIGINAL_BASE_YEAR;
+
+			/* Make sure for example monorail and maglev are available when they should be */
+			if (_date >= e->intro_date && HasBit(e->info.climates, 0)) {
+				e->flags |= ENGINE_AVAILABLE;
+				e->company_avail = (CompanyMask)0xFF;
+				e->age = _date > e->intro_date ? (_date - e->intro_date) / 30 : 0;
+			}
+		} else {
+			/* Using data from TTO savegame */
+			Engine *oe = &_old_engines[oi];
+
+			e->intro_date          = oe->intro_date;
+			e->age                 = oe->age;
+			e->reliability         = oe->reliability;
+			e->reliability_spd_dec = oe->reliability_spd_dec;
+			e->reliability_start   = oe->reliability_start;
+			e->reliability_max     = oe->reliability_max;
+			e->reliability_final   = oe->reliability_final;
+			e->duration_phase_1    = oe->duration_phase_1;
+			e->duration_phase_2    = oe->duration_phase_2;
+			e->duration_phase_3    = oe->duration_phase_3;
+			e->lifelength          = oe->lifelength;
+			e->flags               = oe->flags;
+
+			e->company_avail = 0;
+
+			/* One or more engines were remapped to this one. Make this engine available
+			 * if at least one of them was available. */
+			for (uint j = 0; j < lengthof(tto_to_ttd); j++) {
+				if (tto_to_ttd[j] == i && _old_engines[j].company_avail != 0) {
+					e->company_avail = (CompanyMask)0xFF;
+					e->flags |= ENGINE_AVAILABLE;
+					break;
+				}
+			}
+
+			e->preview_company_rank = 0;
+			e->preview_wait = 0;
+			e->name = NULL;
+
+			e->info.climates = 1;
+		}
+	}
+
+	return true;
+}
+
+static void FixTTOCompanies()
+{
+	Company *c;
+	FOR_ALL_COMPANIES(c) {
+		c->cur_economy.company_value = CalculateCompanyValue(c); // company value history is zeroed
+	}
+}
+
+static inline byte RemapTTOColour(byte tto)
+{
+	/** Lossy remapping of TTO colours to TTD colours. SVXConverter uses the same conversion. */
+	static const byte tto_colour_remap[] = {
+		COLOUR_DARK_BLUE,  COLOUR_GREY,       COLOUR_YELLOW,     COLOUR_RED,
+		COLOUR_PURPLE,     COLOUR_DARK_GREEN, COLOUR_ORANGE,     COLOUR_PALE_GREEN,
+		COLOUR_BLUE,       COLOUR_GREEN,      COLOUR_CREAM,      COLOUR_BROWN,
+		COLOUR_WHITE,      COLOUR_LIGHT_BLUE, COLOUR_MAUVE,      COLOUR_PINK
+	};
+
+	if ((size_t)tto >= lengthof(tto_colour_remap)) return COLOUR_GREY; // this shouldn't happen
+
+	return tto_colour_remap[tto];
+}
+
+static inline uint RemapTownIndex(uint x)
+{
+	return _savegame_type == SGT_TTO ? (x - 0x264) / 78 : (x - 0x264) / 94;
+}
+
+static inline uint RemapOrderIndex(uint x)
+{
+	return _savegame_type == SGT_TTO ? (x - 0x1AC4) / 2 : (x - 0x1C18) / 2;
+}
+
+extern TileIndex *_animated_tile_list;
+extern uint _animated_tile_count;
+extern char *_old_name_array;
+
+static byte   _old_vehicle_multiplier;
+static uint32 _old_town_index;
+static uint16 _old_string_id;
+static uint16 _old_string_id_2;
+static uint16 _old_extra_chunk_nums;
+
+static void ReadTTDPatchFlags()
+{
+	if (_read_ttdpatch_flags) return;
+
+	_read_ttdpatch_flags = true;
+
+	if (_savegame_type == SGT_TTO) {
+		_old_vehicle_multiplier = 1;
+		return;
+	}
+
+	/* TTDPatch misuses _old_map3 for flags.. read them! */
+	_old_vehicle_multiplier = _old_map3[0];
+	/* Somehow.... there was an error in some savegames, so 0 becomes 1
+	and 1 becomes 2. The rest of the values are okay */
+	if (_old_vehicle_multiplier < 2) _old_vehicle_multiplier++;
+
+	_old_vehicle_names = MallocT<StringID>(_old_vehicle_multiplier * 850);
+
+	/* TTDPatch increases the Vehicle-part in the middle of the game,
+	so if the multipler is anything else but 1, the assert fails..
+	bump the assert value so it doesn't!
+	(1 multipler == 850 vehicles
+	1 vehicle   == 128 bytes */
+	_bump_assert_value = (_old_vehicle_multiplier - 1) * 850 * 128;
+
+	for (uint i = 0; i < 17; i++) { // check tile 0, too
+		if (_old_map3[i] != 0) _savegame_type = SGT_TTDP1;
+	}
+
+	/* Check if we have a modern TTDPatch savegame (has extra data all around) */
+	if (memcmp(&_old_map3[0x1FFFA], "TTDp", 4) == 0) _savegame_type = SGT_TTDP2;
+
+	_old_extra_chunk_nums = _old_map3[_savegame_type == SGT_TTDP2 ? 0x1FFFE : 0x2];
+
+	/* Clean the misused places */
+	for (uint i = 0;       i < 17;      i++) _old_map3[i] = 0;
+	for (uint i = 0x1FE00; i < 0x20000; i++) _old_map3[i] = 0;
+
+	if (_savegame_type == SGT_TTDP2) DEBUG(oldloader, 2, "Found TTDPatch game");
+
+	DEBUG(oldloader, 3, "Vehicle-multiplier is set to %d (%d vehicles)", _old_vehicle_multiplier, _old_vehicle_multiplier * 850);
+}
+
+static const OldChunks town_chunk[] = {
+	OCL_SVAR(   OC_TILE, Town, xy ),
+	OCL_NULL( 2 ),         ///< population,        no longer in use
+	OCL_SVAR( OC_UINT16, Town, townnametype ),
+	OCL_SVAR( OC_UINT32, Town, townnameparts ),
+	OCL_SVAR(  OC_UINT8, Town, grow_counter ),
+	OCL_NULL( 1 ),         ///< sort_index,        no longer in use
+	OCL_NULL( 4 ),         ///< sign-coordinates,  no longer in use
+	OCL_NULL( 2 ),         ///< namewidth,         no longer in use
+	OCL_SVAR( OC_UINT16, Town, flags12 ),
+	OCL_NULL( 10 ),        ///< radius,            no longer in use
+
+	OCL_SVAR( OC_UINT16, Town, ratings[0] ),
+	OCL_SVAR( OC_UINT16, Town, ratings[1] ),
+	OCL_SVAR( OC_UINT16, Town, ratings[2] ),
+	OCL_SVAR( OC_UINT16, Town, ratings[3] ),
+	OCL_SVAR( OC_UINT16, Town, ratings[4] ),
+	OCL_SVAR( OC_UINT16, Town, ratings[5] ),
+	OCL_SVAR( OC_UINT16, Town, ratings[6] ),
+	OCL_SVAR( OC_UINT16, Town, ratings[7] ),
+
+	OCL_SVAR( OC_FILE_U32 | OC_VAR_U16, Town, have_ratings ),
+	OCL_SVAR( OC_FILE_U32 | OC_VAR_U16, Town, statues ),
+	OCL_NULL( 2 ),         ///< num_houses,        no longer in use
+	OCL_SVAR(  OC_UINT8, Town, time_until_rebuild ),
+	OCL_SVAR(  OC_UINT8, Town, growth_rate ),
+
+	OCL_SVAR( OC_UINT16, Town, new_max_pass ),
+	OCL_SVAR( OC_UINT16, Town, new_max_mail ),
+	OCL_SVAR( OC_UINT16, Town, new_act_pass ),
+	OCL_SVAR( OC_UINT16, Town, new_act_mail ),
+	OCL_SVAR( OC_UINT16, Town, max_pass ),
+	OCL_SVAR( OC_UINT16, Town, max_mail ),
+	OCL_SVAR( OC_UINT16, Town, act_pass ),
+	OCL_SVAR( OC_UINT16, Town, act_mail ),
+
+	OCL_SVAR(  OC_UINT8, Town, pct_pass_transported ),
+	OCL_SVAR(  OC_UINT8, Town, pct_mail_transported ),
+
+	OCL_SVAR( OC_TTD | OC_UINT16, Town, new_act_food ),
+	OCL_SVAR( OC_TTD | OC_UINT16, Town, new_act_water ),
+	OCL_SVAR( OC_TTD | OC_UINT16, Town, act_food ),
+	OCL_SVAR( OC_TTD | OC_UINT16, Town, act_water ),
+
+	OCL_SVAR(  OC_UINT8, Town, road_build_months ),
+	OCL_SVAR(  OC_UINT8, Town, fund_buildings_months ),
+
+	OCL_CNULL( OC_TTD, 8 ),         ///< some junk at the end of the record
+
+	OCL_END()
+};
+
+static bool LoadOldTown(LoadgameState *ls, int num)
+{
+	Town *t = new (num) Town();
+	if (!LoadChunk(ls, t, town_chunk)) return false;
+
+	if (t->xy != 0) {
+		if (_savegame_type == SGT_TTO) {
+			/* 0x10B6 is auto-generated name, others are custom names */
+			t->townnametype = t->townnametype == 0x10B6 ? 0x20C1 : t->townnametype + 0x2A00;
+		}
+	} else {
+		t->xy = INVALID_TILE;
+	}
+
+	return true;
+}
+
+static uint16 _old_order;
+static const OldChunks order_chunk[] = {
+	OCL_VAR ( OC_UINT16,   1, &_old_order ),
+	OCL_END()
+};
+
+static bool LoadOldOrder(LoadgameState *ls, int num)
+{
+	if (!LoadChunk(ls, NULL, order_chunk)) return false;
+
+	new (num) Order(UnpackOldOrder(_old_order));
+
+	/* Relink the orders to eachother (in the orders for one vehicle are behind eachother,
+	 * with an invalid order (OT_NOTHING) as indication that it is the last order */
+	if (num > 0 && GetOrder(num)->IsValid()) {
+		GetOrder(num - 1)->next = GetOrder(num);
+	}
+
+	return true;
+}
+
+static bool LoadOldAnimTileList(LoadgameState *ls, int num)
+{
+	/* This is sligthly hackish - we must load a chunk into an array whose
+	 * address isn't static, but instead pointed to by _animated_tile_list.
+	 * To achieve that, create an OldChunks list on the stack on the fly.
+	 * The list cannot be static because the value of _animated_tile_list
+	 * can change between calls. */
+
+	const OldChunks anim_chunk[] = {
+		OCL_VAR (   OC_TILE, 256, _animated_tile_list ),
+		OCL_END ()
+	};
+
+	if (!LoadChunk(ls, NULL, anim_chunk)) return false;
+
+	/* Update the animated tile counter by counting till the first zero in the array */
+	for (_animated_tile_count = 0; _animated_tile_count < 256; _animated_tile_count++) {
+		if (_animated_tile_list[_animated_tile_count] == 0) break;
+	}
+
+	return true;
+}
+
+static const OldChunks depot_chunk[] = {
+	OCL_SVAR(   OC_TILE, Depot, xy ),
+	OCL_VAR ( OC_UINT32,                1, &_old_town_index ),
+	OCL_END()
+};
+
+static bool LoadOldDepot(LoadgameState *ls, int num)
+{
+	Depot *d = new (num) Depot();
+	if (!LoadChunk(ls, d, depot_chunk)) return false;
+
+	if (d->xy != 0) {
+		d->town_index = RemapTownIndex(_old_town_index);
+	} else {
+		d->xy = INVALID_TILE;
+	}
+
+	return true;
+}
+
+static int32 _old_price;
+static uint16 _old_price_frac;
+static const OldChunks price_chunk[] = {
+	OCL_VAR (  OC_INT32,   1, &_old_price ),
+	OCL_VAR ( OC_UINT16,   1, &_old_price_frac ),
+	OCL_END()
+};
+
+static bool LoadOldPrice(LoadgameState *ls, int num)
+{
+	if (_savegame_type == SGT_TTO && num == 25) {
+		/* clear_fields == build_road_depot (TTO didn't have this price) */
+		((Money*)&_price)[25] = ((Money*)&_price)[6];
+		_price_frac[25] = _price_frac[6];
+		return true;
+	}
+
+	if (!LoadChunk(ls, NULL, price_chunk)) return false;
+
+	if (_savegame_type == SGT_TTO) {
+		/* base prices are different in these two cases */
+		if (num == 15) _old_price = ClampToI32(((Money)_old_price) * 20 / 3); // build_railvehicle
+		if (num == 17) _old_price = ClampToI32(((Money)_old_price) * 10);     // aircraft_base
+	}
+
+
+	/* We use a struct to store the prices, but they are ints in a row..
+	 * so just access the struct as an array of int32s */
+	((Money*)&_price)[num] = _old_price;
+	_price_frac[num] = _old_price_frac;
+
+	return true;
+}
+
+static const OldChunks cargo_payment_rate_chunk[] = {
+	OCL_VAR (  OC_INT32,   1, &_old_price ),
+	OCL_VAR ( OC_UINT16,   1, &_old_price_frac ),
+
+	OCL_NULL( 2 ),         ///< Junk
+	OCL_END()
+};
+
+static bool LoadOldCargoPaymentRate(LoadgameState *ls, int num)
+{
+	if (_savegame_type == SGT_TTO && num == 11) { // TTD has 1 more cargo type
+		_cargo_payment_rates[num] = _cargo_payment_rates[9];
+		_cargo_payment_rates_frac[num] = _cargo_payment_rates_frac[9];
+		return true;
+	}
+
+	if (!LoadChunk(ls, NULL, cargo_payment_rate_chunk)) return false;
+
+	if (_savegame_type == SGT_TTO) {
+		/* SVXConverter about cargo payment rates correction:
+		* "increase them to compensate for the faster time advance in TTD compared to TTO
+		* which otherwise would cause much less income while the annual running costs of
+		* the vehicles stay the same" */
+
+		Money m = ((((Money)_old_price) << 16) + _old_price_frac) * 124 / 74;
+
+		_old_price = m >> 16;
+		_old_price_frac = GB(m, 0, 16);
+	}
+
+	_cargo_payment_rates[num] = -_old_price;
+	_cargo_payment_rates_frac[num] = _old_price_frac;
+
+	return true;
+}
+
+VehicleID _current_station_id;
+static uint16 _waiting_acceptance;
+static uint8  _cargo_source;
+static uint8  _cargo_days;
+
+static const OldChunks goods_chunk[] = {
+	OCL_VAR ( OC_UINT16, 1,          &_waiting_acceptance ),
+	OCL_SVAR(  OC_UINT8, GoodsEntry, days_since_pickup ),
+	OCL_SVAR(  OC_UINT8, GoodsEntry, rating ),
+	OCL_VAR (  OC_UINT8, 1,          &_cargo_source ),
+	OCL_VAR (  OC_UINT8, 1,          &_cargo_days ),
+	OCL_SVAR(  OC_UINT8, GoodsEntry, last_speed ),
+	OCL_SVAR(  OC_UINT8, GoodsEntry, last_age ),
+
+	OCL_END()
+};
+
+static bool LoadOldGood(LoadgameState *ls, int num)
+{
+	/* for TTO games, 12th (num == 11) goods entry is created in the Station constructor */
+	if (_savegame_type == SGT_TTO && num == 11) return true;
+
+	Station *st = GetStation(_current_station_id);
+	GoodsEntry *ge = &st->goods[num];
+
+	if (!LoadChunk(ls, ge, goods_chunk)) return false;
+
+	SB(ge->acceptance_pickup, GoodsEntry::ACCEPTANCE, 1, HasBit(_waiting_acceptance, 15));
+	SB(ge->acceptance_pickup, GoodsEntry::PICKUP, 1, _cargo_source != 0xFF);
+	if (GB(_waiting_acceptance, 0, 12) != 0) {
+		CargoPacket *cp = new CargoPacket();
+		cp->source          = (_cargo_source == 0xFF) ? INVALID_STATION : _cargo_source;
+		cp->count           = GB(_waiting_acceptance, 0, 12);
+		cp->days_in_transit = _cargo_days;
+		ge->cargo.Append(cp);
+	}
+
+	return true;
+}
+
+static const OldChunks station_chunk[] = {
+	OCL_SVAR(   OC_TILE, Station, xy ),
+	OCL_VAR ( OC_UINT32,   1, &_old_town_index ),
+
+	OCL_NULL( 4 ), ///< bus/lorry tile
+	OCL_SVAR(   OC_TILE, Station, train_tile ),
+	OCL_SVAR(   OC_TILE, Station, airport_tile ),
+	OCL_SVAR(   OC_TILE, Station, dock_tile ),
+	OCL_SVAR(  OC_UINT8, Station, trainst_w ),
+
+	OCL_NULL( 1 ),         ///< sort-index, no longer in use
+	OCL_NULL( 2 ),         ///< sign-width, no longer in use
+
+	OCL_VAR ( OC_UINT16,   1, &_old_string_id ),
+
+	OCL_NULL( 4 ),         ///< sign left/top, no longer in use
+
+	OCL_SVAR( OC_UINT16, Station, had_vehicle_of_type ),
+
+	OCL_CHUNK( 12, LoadOldGood ),
+
+	OCL_SVAR(  OC_UINT8, Station, time_since_load ),
+	OCL_SVAR(  OC_UINT8, Station, time_since_unload ),
+	OCL_SVAR(  OC_UINT8, Station, delete_ctr ),
+	OCL_SVAR(  OC_UINT8, Station, owner ),
+	OCL_SVAR(  OC_UINT8, Station, facilities ),
+	OCL_SVAR( OC_TTD | OC_UINT8, Station, airport_type ),
+	OCL_SVAR( OC_TTO | OC_FILE_U16 | OC_VAR_U32, Station, airport_flags ),
+	OCL_NULL( 3 ),          ///< bus/truck status, blocked months, no longer in use
+	OCL_CNULL( OC_TTD, 1 ), ///< unknown
+	OCL_SVAR( OC_TTD | OC_FILE_U16 | OC_VAR_U32, Station, airport_flags ),
+	OCL_CNULL( OC_TTD, 2 ), ///< last_vehicle. now last_vehicle_type
+	OCL_CNULL( OC_TTD, 4 ), ///< junk at end of chunk
+
+	OCL_END()
+};
+
+static bool LoadOldStation(LoadgameState *ls, int num)
+{
+	Station *st = new (num) Station();
+	_current_station_id = num;
+
+	if (!LoadChunk(ls, st, station_chunk)) return false;
+
+	if (st->xy != 0) {
+		st->town = GetTown(RemapTownIndex(_old_town_index));
+
+		if (_savegame_type == SGT_TTO) {
+			if (IsInsideBS(_old_string_id, 0x180F, 32)) {
+				st->string_id = STR_SV_STNAME + (_old_string_id - 0x180F); // automatic name
+			} else {
+				st->string_id = _old_string_id + 0x2800; // custom name
+			}
+
+			if (HasBit(st->airport_flags, 8)) {
+				st->airport_type = 1; // large airport
+			} else if (HasBit(st->airport_flags, 6)) {
+				st->airport_type = 3; // oil rig
+			} else {
+				st->airport_type = 0; // small airport
+			}
+		} else {
+			st->string_id = RemapOldStringID(_old_string_id);
+		}
+	} else {
+		st->xy = INVALID_TILE;
+	}
+
+	return true;
+}
+
+static const OldChunks industry_chunk[] = {
+	OCL_SVAR(   OC_TILE, Industry, xy ),
+	OCL_VAR ( OC_UINT32,   1, &_old_town_index ),
+	OCL_SVAR(  OC_UINT8, Industry, width ),
+	OCL_SVAR(  OC_UINT8, Industry, height ),
+	OCL_NULL( 2 ),  ///< used to be industry's produced_cargo
+
+	OCL_SVAR( OC_TTD | OC_UINT16, Industry, produced_cargo_waiting[0] ),
+	OCL_SVAR( OC_TTD | OC_UINT16, Industry, produced_cargo_waiting[1] ),
+	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Industry, produced_cargo_waiting[0] ),
+	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Industry, produced_cargo_waiting[1] ),
+
+	OCL_SVAR(  OC_UINT8, Industry, production_rate[0] ),
+	OCL_SVAR(  OC_UINT8, Industry, production_rate[1] ),
+
+	OCL_NULL( 3 ),  ///< used to be industry's accepts_cargo
+
+	OCL_SVAR(  OC_UINT8, Industry, prod_level ),
+
+	OCL_SVAR( OC_UINT16, Industry, this_month_production[0] ),
+	OCL_SVAR( OC_UINT16, Industry, this_month_production[1] ),
+	OCL_SVAR( OC_UINT16, Industry, this_month_transported[0] ),
+	OCL_SVAR( OC_UINT16, Industry, this_month_transported[1] ),
+
+	OCL_SVAR(  OC_UINT8, Industry, last_month_pct_transported[0] ),
+	OCL_SVAR(  OC_UINT8, Industry, last_month_pct_transported[1] ),
+
+	OCL_SVAR( OC_UINT16, Industry, last_month_production[0] ),
+	OCL_SVAR( OC_UINT16, Industry, last_month_production[1] ),
+	OCL_SVAR( OC_UINT16, Industry, last_month_transported[0] ),
+	OCL_SVAR( OC_UINT16, Industry, last_month_transported[1] ),
+
+	OCL_SVAR(  OC_UINT8, Industry, type ),
+	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Industry, counter ),
+	OCL_SVAR(  OC_UINT8, Industry, owner ),
+	OCL_SVAR(  OC_UINT8, Industry, random_color ),
+	OCL_SVAR( OC_TTD | OC_FILE_U8 | OC_VAR_I32, Industry, last_prod_year ),
+	OCL_SVAR( OC_TTD | OC_UINT16, Industry, counter ),
+	OCL_SVAR( OC_TTD | OC_UINT8, Industry, was_cargo_delivered ),
+
+	OCL_CNULL( OC_TTD, 9 ), ///< Random junk at the end of this chunk
+
+	OCL_END()
+};
+
+static bool LoadOldIndustry(LoadgameState *ls, int num)
+{
+	Industry *i = new (num) Industry();
+	if (!LoadChunk(ls, i, industry_chunk)) return false;
+
+	if (i->xy != 0) {
+		i->town = GetTown(RemapTownIndex(_old_town_index));
+
+		if (_savegame_type == SGT_TTO) {
+			if (i->type > 0x06) i->type++; // Printing Works were added
+			if (i->type == 0x0A) i->type = 0x12; // Iron Ore Mine has different ID
+
+			YearMonthDay ymd;
+			ConvertDateToYMD(_date, &ymd);
+			i->last_prod_year = ymd.year;
+
+			i->random_color = RemapTTOColour(i->random_color);
+		}
+
+		IncIndustryTypeCount(i->type);
+	} else {
+		i->xy = INVALID_TILE;
+	}
+
+	return true;
+}
+
+CompanyID _current_company_id;
+static int32 _old_yearly;
+
+static const OldChunks _company_yearly_chunk[] = {
+	OCL_VAR(  OC_INT32,   1, &_old_yearly ),
+	OCL_END()
+};
+
+static bool LoadOldCompanyYearly(LoadgameState *ls, int num)
+{
+	Company *c = GetCompany(_current_company_id);
+
+	for (uint i = 0; i < 13; i++) {
+		if (_savegame_type == SGT_TTO && i == 6) {
+			_old_yearly = 0; // property maintenance
+		} else {
+			if (!LoadChunk(ls, NULL, _company_yearly_chunk)) return false;
+		}
+
+		c->yearly_expenses[num][i] = _old_yearly;
+	}
+
+	return true;
+}
+
+static const OldChunks _company_economy_chunk[] = {
+	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, CompanyEconomyEntry, income ),
+	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, CompanyEconomyEntry, expenses ),
+	OCL_SVAR( OC_INT32,                 CompanyEconomyEntry, delivered_cargo ),
+	OCL_SVAR( OC_INT32,                 CompanyEconomyEntry, performance_history ),
+	OCL_SVAR( OC_TTD | OC_FILE_I32 | OC_VAR_I64, CompanyEconomyEntry, company_value ),
+
+	OCL_END()
+};
+
+static bool LoadOldCompanyEconomy(LoadgameState *ls, int num)
+{
+	Company *c = GetCompany(_current_company_id);
+
+	if (!LoadChunk(ls, &c->cur_economy, _company_economy_chunk)) return false;
+
+	/* Don't ask, but the number in TTD(Patch) are inversed to OpenTTD */
+	c->cur_economy.income   = -c->cur_economy.income;
+	c->cur_economy.expenses = -c->cur_economy.expenses;
+
+	for (uint i = 0; i < 24; i++) {
+		if (!LoadChunk(ls, &c->old_economy[i], _company_economy_chunk)) return false;
+
+		c->old_economy[i].income   = -c->old_economy[i].income;
+		c->old_economy[i].expenses = -c->old_economy[i].expenses;
+	}
+
+	return true;
+}
+
+static const OldChunks _company_chunk[] = {
+	OCL_VAR ( OC_UINT16,   1, &_old_string_id ),
+	OCL_SVAR( OC_UINT32, Company, name_2 ),
+	OCL_SVAR( OC_UINT32, Company, face ),
+	OCL_VAR ( OC_UINT16,   1, &_old_string_id_2 ),
+	OCL_SVAR( OC_UINT32, Company, president_name_2 ),
+
+	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, Company, money ),
+	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, Company, current_loan ),
+
+	OCL_SVAR(  OC_UINT8, Company, colour ),
+	OCL_SVAR(  OC_UINT8, Company, money_fraction ),
+	OCL_SVAR(  OC_UINT8, Company, quarters_of_bankrupcy ),
+	OCL_SVAR(  OC_UINT8, Company, bankrupt_asked ),
+	OCL_SVAR( OC_FILE_U32 | OC_VAR_I64, Company, bankrupt_value ),
+	OCL_SVAR( OC_UINT16, Company, bankrupt_timeout ),
+
+	OCL_SVAR( OC_TTD | OC_UINT32, Company, cargo_types ),
+	OCL_SVAR( OC_TTO | OC_FILE_U16 | OC_VAR_U32, Company, cargo_types ),
+
+	OCL_CHUNK( 3, LoadOldCompanyYearly ),
+	OCL_CHUNK( 1, LoadOldCompanyEconomy ),
+
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Company, inaugurated_year),
+	OCL_SVAR(                  OC_TILE, Company, last_build_coordinate ),
+	OCL_SVAR(                 OC_UINT8, Company, num_valid_stat_ent ),
+
+	OCL_NULL( 230 ),         // Old AI
+
+	OCL_SVAR(  OC_UINT8, Company, block_preview ),
+	OCL_CNULL( OC_TTD, 1 ),           // Old AI
+	OCL_SVAR( OC_TTD | OC_UINT8, Company, avail_railtypes ),
+	OCL_SVAR(   OC_TILE, Company, location_of_HQ ),
+	OCL_SVAR( OC_TTD | OC_UINT8, Company, share_owners[0] ),
+	OCL_SVAR( OC_TTD | OC_UINT8, Company, share_owners[1] ),
+	OCL_SVAR( OC_TTD | OC_UINT8, Company, share_owners[2] ),
+	OCL_SVAR( OC_TTD | OC_UINT8, Company, share_owners[3] ),
+
+	OCL_CNULL( OC_TTD, 8 ), ///< junk at end of chunk
+
+	OCL_END()
+};
+
+static bool LoadOldCompany(LoadgameState *ls, int num)
+{
+	Company *c = new (num) Company();
+
+	_current_company_id = (CompanyID)num;
+
+	if (!LoadChunk(ls, c, _company_chunk)) return false;
+
+	if (_old_string_id == 0) {
+		delete c;
+		return true;
+	}
+
+	if (_savegame_type == SGT_TTO) {
+		/* adjust manager's face */
+		if (HasBit(c->face, 27) && GB(c->face, 26, 1) == GB(c->face, 19, 1)) {
+			/* if face would be black in TTD, adjust tie color and thereby face color */
+			ClrBit(c->face, 27);
+		}
+
+		/* Company name */
+		if (_old_string_id == 0 || _old_string_id == 0x4C00) {
+			_old_string_id = STR_SV_UNNAMED; // "Unnamed"
+		} else if (GB(_old_string_id, 8, 8) == 0x52) {
+			_old_string_id += 0x2A00; // Custom name
+		} else {
+			_old_string_id = RemapOldStringID(_old_string_id += 0x240D); // Automatic name
+		}
+		c->name_1 = _old_string_id;
+
+		/* Manager name */
+		switch (_old_string_id_2) {
+			case 0x4CDA: _old_string_id_2 = SPECSTR_PRESIDENT_NAME;    break; // automatic name
+			case 0x0006: _old_string_id_2 = STR_SV_EMPTY;              break; // empty name
+			default:     _old_string_id_2 = _old_string_id_2 + 0x2A00; break; // custom name
+		}
+		c->president_name_1 = _old_string_id_2;
+
+		c->colour = RemapTTOColour(c->colour);
+
+		if (num != 0) c->is_ai = true;
+	} else {
+		c->name_1 = RemapOldStringID(_old_string_id);
+		c->president_name_1 = RemapOldStringID(_old_string_id_2);
+
+		if (num == 0) {
+			/* If the first company has no name, make sure we call it UNNAMED */
+			if (c->name_1 == 0)
+				c->name_1 = STR_SV_UNNAMED;
+		} else {
+			/* Beside some multiplayer maps (1 on 1), which we don't official support,
+			* all other companys are an AI.. mark them as such */
+			c->is_ai = true;
+		}
+
+		/* Sometimes it is better to not ask.. in old scenarios, the money
+		* was always 893288 pounds. In the newer versions this is correct,
+		* but correct for those oldies
+		* Ps: this also means that if you had exact 893288 pounds, you will go back
+		* to 100000.. this is a very VERY small chance ;) */
+		if (c->money == 893288) c->money = c->current_loan = 100000;
+	}
+
+	_company_colours[num] = c->colour;
+	c->inaugurated_year -= ORIGINAL_BASE_YEAR;
+
+	return true;
+}
+
+static uint32 _old_order_ptr;
+static uint16 _old_next_ptr;
+VehicleID _current_vehicle_id;
+
+static const OldChunks vehicle_train_chunk[] = {
+	OCL_SVAR(  OC_UINT8, VehicleRail, track ),
+	OCL_SVAR(  OC_UINT8, VehicleRail, force_proceed ),
+	OCL_SVAR( OC_UINT16, VehicleRail, crash_anim_pos ),
+	OCL_SVAR(  OC_UINT8, VehicleRail, railtype ),
+
+	OCL_NULL( 5 ), ///< Junk
+
+	OCL_END()
+};
+
+static const OldChunks vehicle_road_chunk[] = {
+	OCL_SVAR(  OC_UINT8, VehicleRoad, state ),
+	OCL_SVAR(  OC_UINT8, VehicleRoad, frame ),
+	OCL_SVAR( OC_UINT16, VehicleRoad, blocked_ctr ),
+	OCL_SVAR(  OC_UINT8, VehicleRoad, overtaking ),
+	OCL_SVAR(  OC_UINT8, VehicleRoad, overtaking_ctr ),
+	OCL_SVAR( OC_UINT16, VehicleRoad, crashed_ctr ),
+	OCL_SVAR(  OC_UINT8, VehicleRoad, reverse_ctr ),
+
+	OCL_NULL( 1 ), ///< Junk
+
+	OCL_END()
+};
+
+static const OldChunks vehicle_ship_chunk[] = {
+	OCL_SVAR(  OC_UINT8, VehicleShip, state ),
+
+	OCL_NULL( 9 ), ///< Junk
+
+	OCL_END()
+};
+
+static const OldChunks vehicle_air_chunk[] = {
+	OCL_SVAR(  OC_UINT8, VehicleAir, pos ),
+	OCL_SVAR(  OC_FILE_U8 | OC_VAR_U16, VehicleAir, targetairport ),
+	OCL_SVAR( OC_UINT16, VehicleAir, crashed_counter ),
+	OCL_SVAR(  OC_UINT8, VehicleAir, state ),
+
+	OCL_NULL( 5 ), ///< Junk
+
+	OCL_END()
+};
+
+static const OldChunks vehicle_effect_chunk[] = {
+	OCL_SVAR( OC_UINT16, VehicleEffect, animation_state ),
+	OCL_SVAR(  OC_UINT8, VehicleEffect, animation_substate ),
+
+	OCL_NULL( 7 ), // Junk
+
+	OCL_END()
+};
+
+static const OldChunks vehicle_disaster_chunk[] = {
+	OCL_SVAR( OC_UINT16, VehicleDisaster, image_override ),
+	OCL_SVAR( OC_UINT16, VehicleDisaster, big_ufo_destroyer_target ),
+
+	OCL_NULL( 6 ), ///< Junk
+
+	OCL_END()
+};
+
+static const OldChunks vehicle_empty_chunk[] = {
+	OCL_NULL( 10 ), ///< Junk
+
+	OCL_END()
+};
+
+static bool LoadOldVehicleUnion(LoadgameState *ls, int num)
+{
+	Vehicle *v = GetVehicle(_current_vehicle_id);
+	uint temp = ls->total_read;
+	bool res;
+
+	switch (v->type) {
+		default: NOT_REACHED();
+		case VEH_INVALID : res = LoadChunk(ls, NULL,           vehicle_empty_chunk);    break;
+		case VEH_TRAIN   : res = LoadChunk(ls, &v->u.rail,     vehicle_train_chunk);    break;
+		case VEH_ROAD    : res = LoadChunk(ls, &v->u.road,     vehicle_road_chunk);     break;
+		case VEH_SHIP    : res = LoadChunk(ls, &v->u.ship,     vehicle_ship_chunk);     break;
+		case VEH_AIRCRAFT: res = LoadChunk(ls, &v->u.air,      vehicle_air_chunk);      break;
+		case VEH_EFFECT  : res = LoadChunk(ls, &v->u.effect,   vehicle_effect_chunk);   break;
+		case VEH_DISASTER: res = LoadChunk(ls, &v->u.disaster, vehicle_disaster_chunk); break;
+	}
+
+	/* This chunk size should always be 10 bytes */
+	if (ls->total_read - temp != 10) {
+		DEBUG(oldloader, 0, "Assert failed in VehicleUnion: invalid chunk size");
+		return false;
+	}
+
+	return res;
+}
+
+static uint16 _cargo_count;
+
+static const OldChunks vehicle_chunk[] = {
+	OCL_SVAR(  OC_UINT8, Vehicle, subtype ),
+
+	OCL_NULL( 2 ),         ///< Hash, calculated automatically
+	OCL_NULL( 2 ),         ///< Index, calculated automatically
+
+	OCL_VAR ( OC_UINT32,   1, &_old_order_ptr ),
+	OCL_VAR ( OC_UINT16,   1, &_old_order ),
+
+	OCL_NULL ( 1 ), ///< num_orders, now calculated
+	OCL_SVAR(  OC_UINT8, Vehicle, cur_order_index ),
+	OCL_SVAR(   OC_TILE, Vehicle, dest_tile ),
+	OCL_SVAR( OC_UINT16, Vehicle, load_unload_time_rem ),
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Vehicle, date_of_last_service ),
+	OCL_SVAR( OC_UINT16, Vehicle, service_interval ),
+	OCL_SVAR( OC_FILE_U8 | OC_VAR_U16, Vehicle, last_station_visited ),
+	OCL_SVAR( OC_TTD | OC_UINT8, Vehicle, tick_counter ),
+	OCL_SVAR( OC_TTD | OC_UINT16, Vehicle, max_speed ),
+	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Vehicle, max_speed ),
+
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Vehicle, x_pos ),
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Vehicle, y_pos ),
+	OCL_SVAR(  OC_UINT8, Vehicle, z_pos ),
+	OCL_SVAR(  OC_UINT8, Vehicle, direction ),
+	OCL_NULL( 2 ),         ///< x_offs and y_offs, calculated automatically
+	OCL_NULL( 2 ),         ///< x_extent and y_extent, calculated automatically
+	OCL_NULL( 1 ),         ///< z_extent, calculated automatically
+
+	OCL_SVAR(  OC_UINT8, Vehicle, owner ),
+	OCL_SVAR(   OC_TILE, Vehicle, tile ),
+	OCL_SVAR( OC_UINT16, Vehicle, cur_image ),
+
+	OCL_NULL( 8 ),        ///< Vehicle sprite box, calculated automatically
+
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_U8, Vehicle, vehstatus ),
+	OCL_SVAR( OC_TTD | OC_UINT16, Vehicle, cur_speed ),
+	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Vehicle, cur_speed ),
+	OCL_SVAR(  OC_UINT8, Vehicle, subspeed ),
+	OCL_SVAR(  OC_UINT8, Vehicle, acceleration ),
+	OCL_SVAR(  OC_UINT8, Vehicle, progress ),
+
+	OCL_SVAR(  OC_UINT8, Vehicle, cargo_type ),
+	OCL_SVAR( OC_TTD | OC_UINT16, Vehicle, cargo_cap ),
+	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Vehicle, cargo_cap ),
+	OCL_VAR ( OC_TTD | OC_UINT16, 1, &_cargo_count ),
+	OCL_VAR ( OC_TTO | OC_FILE_U8 | OC_VAR_U16, 1, &_cargo_count ),
+	OCL_VAR (  OC_UINT8, 1,       &_cargo_source ),
+	OCL_VAR (  OC_UINT8, 1,       &_cargo_days ),
+
+	OCL_SVAR( OC_TTO | OC_UINT8, Vehicle, tick_counter ),
+
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Vehicle, age ),
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Vehicle, max_age ),
+	OCL_SVAR( OC_FILE_U8 | OC_VAR_I32, Vehicle, build_year ),
+	OCL_SVAR( OC_FILE_U8 | OC_VAR_U16, Vehicle, unitnumber ),
+
+	OCL_SVAR( OC_TTD | OC_UINT16, Vehicle, engine_type ),
+	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Vehicle, engine_type ),
+
+	OCL_SVAR(  OC_UINT8, Vehicle, spritenum ),
+	OCL_SVAR(  OC_UINT8, Vehicle, day_counter ),
+
+	OCL_SVAR(  OC_UINT8, Vehicle, breakdowns_since_last_service ),
+	OCL_SVAR(  OC_UINT8, Vehicle, breakdown_ctr ),
+	OCL_SVAR(  OC_UINT8, Vehicle, breakdown_delay ),
+	OCL_SVAR(  OC_UINT8, Vehicle, breakdown_chance ),
+
+	OCL_CNULL( OC_TTO, 1 ),
+
+	OCL_SVAR( OC_UINT16, Vehicle, reliability ),
+	OCL_SVAR( OC_UINT16, Vehicle, reliability_spd_dec ),
+
+	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, Vehicle, profit_this_year ),
+	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, Vehicle, profit_last_year ),
+
+	OCL_VAR ( OC_UINT16,   1, &_old_next_ptr ),
+
+	OCL_SVAR( OC_FILE_U32 | OC_VAR_I64, Vehicle, value ),
+
+	OCL_VAR ( OC_UINT16,   1, &_old_string_id ),
+
+	OCL_CHUNK( 1, LoadOldVehicleUnion ),
+
+	OCL_CNULL( OC_TTO, 24 ), ///< junk
+	OCL_CNULL( OC_TTD, 20 ), ///< junk at end of struct (TTDPatch has some data in it)
+
+	OCL_END()
+};
+
+bool LoadOldVehicle(LoadgameState *ls, int num)
+{
+	/* Read the TTDPatch flags, because we need some info from it */
+	ReadTTDPatchFlags();
+
+	for (uint i = 0; i < _old_vehicle_multiplier; i++) {
+		_current_vehicle_id = num * _old_vehicle_multiplier + i;
+
+		Vehicle *v;
+
+		if (_savegame_type == SGT_TTO) {
+			uint type = ReadByte(ls);
+			switch (type) {
+				default: return false;
+				case 0x00 /*VEH_INVALID */: v = new (_current_vehicle_id) InvalidVehicle();  break;
+				case 0x25 /* MONORAIL   */:
+				case 0x20 /*VEH_TRAIN   */: v = new (_current_vehicle_id) Train();           break;
+				case 0x21 /*VEH_ROAD    */: v = new (_current_vehicle_id) RoadVehicle();     break;
+				case 0x22 /*VEH_SHIP    */: v = new (_current_vehicle_id) Ship();            break;
+				case 0x23 /*VEH_AIRCRAFT*/: v = new (_current_vehicle_id) Aircraft();        break;
+				case 0x24 /*VEH_EFFECT  */: v = new (_current_vehicle_id) EffectVehicle();   break;
+				case 0x26 /*VEH_DISASTER*/: v = new (_current_vehicle_id) DisasterVehicle(); break;
+			}
+
+			if (!LoadChunk(ls, v, vehicle_chunk)) return false;
+
+			SpriteID sprite = v->cur_image;
+			/* no need to override other sprites */
+			if (IsInsideMM(sprite, 1460, 1465)) {
+				sprite += 580; // aircraft smoke puff
+			} else if (IsInsideMM(sprite, 2096, 2115)) {
+				sprite += 977; // special effects part 1
+			} else if (IsInsideMM(sprite, 2396, 2436)) {
+				sprite += 1305; // special effects part 2
+			} else if (IsInsideMM(sprite, 2516, 2539)) {
+				sprite += 1385; // rotor or disaster-related vehicles
+			}
+			v->cur_image = sprite;
+
+			switch (v->type) {
+				case VEH_TRAIN: {
+					static const byte spriteset_rail[] = {
+						0,   2,   4,   4,   8,  10,  12,  14,  16,  18,  20,  22,  40,  42,  44,  46,
+						48,  52,  54,  66,  68,  70,  72,  74,  76,  78,  80,  82,  84,  86, 120, 122,
+						124, 126, 128, 130, 132, 134, 136, 138, 140
+					};
+					if (v->spritenum / 2 >= lengthof(spriteset_rail)) return false;
+					v->spritenum = spriteset_rail[v->spritenum / 2]; // adjust railway sprite set offset
+					v->u.rail.railtype = type == 0x25 ? 1 : 0; // monorail / rail
+					break;
+				}
+
+				case VEH_ROAD:
+					if (v->spritenum >= 22) v->spritenum += 12;
+					break;
+
+				case VEH_SHIP:
+					v->spritenum += 2;
+
+					switch (v->spritenum) {
+						case 2: // oil tanker && cargo type != oil
+							if (v->cargo_type != CT_OIL) v->spritenum = 0; // make it a coal/goods ship
+							break;
+						case 4: // passenger ship && cargo type == mail
+							if (v->cargo_type == CT_MAIL) v->spritenum = 0; // make it a mail ship
+							break;
+						default:
+							break;
+					}
+					break;
+
+				default:
+					break;
+			}
+
+			switch (_old_string_id) {
+				case 0x0000: break; // empty (invalid vehicles)
+				case 0x0006: _old_string_id  = STR_SV_EMPTY;         break; // empty (special vehicles)
+				case 0x8495: _old_string_id  = STR_SV_TRAIN_NAME;    break; // "Train X"
+				case 0x8842: _old_string_id  = STR_SV_ROADVEH_NAME;  break; // "Road Vehicle X"
+				case 0x8C3B: _old_string_id  = STR_SV_SHIP_NAME;     break; // "Ship X"
+				case 0x9047: _old_string_id  = STR_SV_AIRCRAFT_NAME; break; // "Aircraft X"
+				default:     _old_string_id += 0x2A00;               break; // custom name
+			}
+
+			_old_vehicle_names[_current_vehicle_id] = _old_string_id;
+		} else {
+			/* Read the vehicle type and allocate the right vehicle */
+			switch (ReadByte(ls)) {
+				default: NOT_REACHED();
+				case 0x00 /*VEH_INVALID */: v = new (_current_vehicle_id) InvalidVehicle();  break;
+				case 0x10 /*VEH_TRAIN   */: v = new (_current_vehicle_id) Train();           break;
+				case 0x11 /*VEH_ROAD    */: v = new (_current_vehicle_id) RoadVehicle();     break;
+				case 0x12 /*VEH_SHIP    */: v = new (_current_vehicle_id) Ship();            break;
+				case 0x13 /*VEH_AIRCRAFT*/: v = new (_current_vehicle_id) Aircraft();        break;
+				case 0x14 /*VEH_EFFECT  */: v = new (_current_vehicle_id) EffectVehicle();   break;
+				case 0x15 /*VEH_DISASTER*/: v = new (_current_vehicle_id) DisasterVehicle(); break;
+			}
+			if (!LoadChunk(ls, v, vehicle_chunk)) return false;
+
+			_old_vehicle_names[_current_vehicle_id] = RemapOldStringID(_old_string_id);
+
+			/* This should be consistent, else we have a big problem... */
+			if (v->index != _current_vehicle_id) {
+				DEBUG(oldloader, 0, "Loading failed - vehicle-array is invalid");
+				return false;
+			}
+		}
+
+		if (_old_order_ptr != 0 && _old_order_ptr != 0xFFFFFFFF) {
+			uint max = _savegame_type == SGT_TTO ? 3000 : 5000;
+			uint old_id = RemapOrderIndex(_old_order_ptr);
+			if (old_id < max) v->orders.old = GetOrder(old_id); // don't accept orders > max number of orders
+		}
+		v->current_order.AssignOrder(UnpackOldOrder(_old_order));
+
+		if (_old_next_ptr != 0xFFFF) v->next = GetVehiclePoolSize() <= _old_next_ptr ? new (_old_next_ptr) InvalidVehicle() : GetVehicle(_old_next_ptr);
+
+		if (_cargo_count != 0) {
+			CargoPacket *cp = new CargoPacket((_cargo_source == 0xFF) ? INVALID_STATION : _cargo_source, _cargo_count);
+			cp->days_in_transit = _cargo_days;
+			v->cargo.Append(cp);
+		}
+	}
+
+	return true;
+}
+
+static const OldChunks sign_chunk[] = {
+	OCL_VAR ( OC_UINT16, 1, &_old_string_id ),
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Sign, x ),
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Sign, y ),
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_I8, Sign, z ),
+
+	OCL_NULL( 6 ),         ///< Width of sign, no longer in use
+
+	OCL_END()
+};
+
+static bool LoadOldSign(LoadgameState *ls, int num)
+{
+	Sign *si = new (num) Sign();
+	if (!LoadChunk(ls, si, sign_chunk)) return false;
+
+	if (_old_string_id != 0) {
+		if (_savegame_type == SGT_TTO) {
+			if (_old_string_id != 0x140A) si->name = CopyFromOldName(_old_string_id + 0x2A00);
+		} else {
+			si->name = CopyFromOldName(RemapOldStringID(_old_string_id));
+		}
+		si->owner = OWNER_NONE;
+	}
+
+	return true;
+}
+
+static const OldChunks engine_chunk[] = {
+	OCL_SVAR( OC_UINT16, Engine, company_avail ),
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Engine, intro_date ),
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Engine, age ),
+	OCL_SVAR( OC_UINT16, Engine, reliability ),
+	OCL_SVAR( OC_UINT16, Engine, reliability_spd_dec ),
+	OCL_SVAR( OC_UINT16, Engine, reliability_start ),
+	OCL_SVAR( OC_UINT16, Engine, reliability_max ),
+	OCL_SVAR( OC_UINT16, Engine, reliability_final ),
+	OCL_SVAR( OC_UINT16, Engine, duration_phase_1 ),
+	OCL_SVAR( OC_UINT16, Engine, duration_phase_2 ),
+	OCL_SVAR( OC_UINT16, Engine, duration_phase_3 ),
+
+	OCL_SVAR(  OC_UINT8, Engine, lifelength ),
+	OCL_SVAR(  OC_UINT8, Engine, flags ),
+	OCL_SVAR(  OC_UINT8, Engine, preview_company_rank ),
+	OCL_SVAR(  OC_UINT8, Engine, preview_wait ),
+
+	OCL_CNULL( OC_TTD, 2 ), ///< railtype + junk
+
+	OCL_END()
+};
+
+static bool LoadOldEngine(LoadgameState *ls, int num)
+{
+	Engine *e = _savegame_type == SGT_TTO ? &_old_engines[num] : GetTempDataEngine(num);
+	return LoadChunk(ls, e, engine_chunk);
+}
+
+static bool LoadOldEngineName(LoadgameState *ls, int num)
+{
+	Engine *e = GetTempDataEngine(num);
+	e->name = CopyFromOldName(RemapOldStringID(ReadUint16(ls)));
+	return true;
+}
+
+static const OldChunks subsidy_chunk[] = {
+	OCL_SVAR(  OC_UINT8, Subsidy, cargo_type ),
+	OCL_SVAR(  OC_UINT8, Subsidy, age ),
+	OCL_SVAR(  OC_FILE_U8 | OC_VAR_U16, Subsidy, from ),
+	OCL_SVAR(  OC_FILE_U8 | OC_VAR_U16, Subsidy, to ),
+
+	OCL_END()
+};
+
+static bool LoadOldSubsidy(LoadgameState *ls, int num)
+{
+	return LoadChunk(ls, &_subsidies[num], subsidy_chunk);
+}
+
+static const OldChunks game_difficulty_chunk[] = {
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, max_no_competitors ),
+	OCL_NULL( 2), // competitor_start_time
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, number_towns ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, number_industries ),
+	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, DifficultySettings, max_loan ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, initial_interest ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, vehicle_costs ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, competitor_speed ),
+	OCL_NULL( 2), // competitor_intelligence
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, vehicle_breakdowns ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, subsidy_multiplier ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, construction_cost ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, terrain_type ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, quantity_sea_lakes ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, economy ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, line_reverse_mode ),
+	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, disasters ),
+	OCL_END()
+};
+
+static bool LoadOldGameDifficulty(LoadgameState *ls, int num)
+{
+	bool ret = LoadChunk(ls, &_settings_game.difficulty, game_difficulty_chunk);
+	_settings_game.difficulty.max_loan *= 1000;
+	return ret;
+}
+
+
+static bool LoadOldMapPart1(LoadgameState *ls, int num)
+{
+	if (_savegame_type == SGT_TTO) {
+		MemSetT(_m, 0, OLD_MAP_SIZE);
+		MemSetT(_me, 0, OLD_MAP_SIZE);
+	}
+
+	for (uint i = 0; i < OLD_MAP_SIZE; i++) {
+		_m[i].m1 = ReadByte(ls);
+	}
+	for (uint i = 0; i < OLD_MAP_SIZE; i++) {
+		_m[i].m2 = ReadByte(ls);
+	}
+
+	if (_savegame_type != SGT_TTO) {
+		for (uint i = 0; i < OLD_MAP_SIZE; i++) {
+			_old_map3[i * 2] = ReadByte(ls);
+			_old_map3[i * 2 + 1] = ReadByte(ls);
+		}
+		for (uint i = 0; i < OLD_MAP_SIZE / 4; i++) {
+			byte b = ReadByte(ls);
+			_m[i * 4 + 0].m6 = GB(b, 0, 2);
+			_m[i * 4 + 1].m6 = GB(b, 2, 2);
+			_m[i * 4 + 2].m6 = GB(b, 4, 2);
+			_m[i * 4 + 3].m6 = GB(b, 6, 2);
+		}
+	}
+
+	return !ls->failed;
+}
+
+static bool LoadOldMapPart2(LoadgameState *ls, int num)
+{
+	uint i;
+
+	for (i = 0; i < OLD_MAP_SIZE; i++) {
+		_m[i].type_height = ReadByte(ls);
+	}
+	for (i = 0; i < OLD_MAP_SIZE; i++) {
+		_m[i].m5 = ReadByte(ls);
+	}
+
+	return !ls->failed;
+}
+
+static bool LoadTTDPatchExtraChunks(LoadgameState *ls, int num)
+{
+	ReadTTDPatchFlags();
+
+	DEBUG(oldloader, 2, "Found %d extra chunk(s)", _old_extra_chunk_nums);
+
+	for (int i = 0; i != _old_extra_chunk_nums; i++) {
+		uint16 id = ReadUint16(ls);
+		uint32 len = ReadUint32(ls);
+
+		switch (id) {
+			/* List of GRFIDs, used in the savegame. 0x8004 is the new ID
+			 * They are saved in a 'GRFID:4 active:1' format, 5 bytes for each entry */
+			case 0x2:
+			case 0x8004: {
+				/* Skip the first element: TTDP hack for the Action D special variables (FFFF0000 01) */
+				ReadUint32(ls); ReadByte(ls); len -= 5;
+
+				ClearGRFConfigList(&_grfconfig);
+				while (len != 0) {
+					uint32 grfid = ReadUint32(ls);
+
+					if (ReadByte(ls) == 1) {
+						GRFConfig *c = CallocT<GRFConfig>(1);
+						c->grfid = grfid;
+						c->filename = strdup("TTDP game, no information");
+
+						AppendToGRFConfigList(&_grfconfig, c);
+						DEBUG(oldloader, 3, "TTDPatch game using GRF file with GRFID %0X", BSWAP32(c->grfid));
+					}
+					len -= 5;
+				};
+
+				/* Append static NewGRF configuration */
+				AppendStaticGRFConfigs(&_grfconfig);
+			} break;
+
+			/* TTDPatch version and configuration */
+			case 0x3:
+				_ttdp_version = ReadUint32(ls);
+				DEBUG(oldloader, 3, "Game saved with TTDPatch version %d.%d.%d r%d",
+					GB(_ttdp_version, 24, 8), GB(_ttdp_version, 20, 4), GB(_ttdp_version, 16, 4), GB(_ttdp_version, 0, 16));
+				len -= 4;
+				while (len-- != 0) ReadByte(ls); // skip the configuration
+				break;
+
+			default:
+				DEBUG(oldloader, 4, "Skipping unknown extra chunk %X", id);
+				while (len-- != 0) ReadByte(ls);
+				break;
+		}
+	}
+
+	return !ls->failed;
+}
+
+extern TileIndex _cur_tileloop_tile;
+static uint32 _old_cur_town_ctr;
+static const OldChunks main_chunk[] = {
+	OCL_ASSERT( OC_TTD, 0 ),
+	OCL_ASSERT( OC_TTO, 0 ),
+	OCL_VAR ( OC_FILE_U16 | OC_VAR_U32, 1, &_date ),
+	OCL_VAR ( OC_UINT16,   1, &_date_fract ),
+	OCL_NULL( 600 ),            ///< TextEffects
+	OCL_VAR ( OC_UINT32,   2, &_random.state ),
+
+	OCL_ASSERT( OC_TTD, 0x264 ),
+	OCL_ASSERT( OC_TTO, 0x264 ),
+
+	OCL_CCHUNK( OC_TTD, 70, LoadOldTown ),
+	OCL_CCHUNK( OC_TTO, 80, LoadOldTown ),
+
+	OCL_ASSERT( OC_TTD, 0x1C18 ),
+	OCL_ASSERT( OC_TTO, 0x1AC4 ),
+
+	OCL_CCHUNK( OC_TTD, 5000, LoadOldOrder ),
+	OCL_CCHUNK( OC_TTO, 3000, LoadOldOrder ),
+
+	OCL_ASSERT( OC_TTD, 0x4328 ),
+	OCL_ASSERT( OC_TTO, 0x3234 ),
+
+	OCL_CHUNK( 1, LoadOldAnimTileList ),
+	OCL_NULL( 4 ),              ///< old end-of-order-list-pointer, no longer in use
+
+	OCL_ASSERT( OC_TTO, 0x3438 ),
+
+	OCL_CCHUNK( OC_TTD, 255, LoadOldDepot ),
+	OCL_CCHUNK( OC_TTO, 252, LoadOldDepot ),
+
+	OCL_ASSERT( OC_TTD, 0x4B26 ),
+	OCL_ASSERT( OC_TTO, 0x3A20 ),
+
+	OCL_VAR ( OC_UINT32,   1, &_old_cur_town_ctr ),
+	OCL_NULL( 2 ),              ///< timer_counter, no longer in use
+	OCL_NULL( 2 ),              ///< land_code,     no longer in use
+
+	OCL_VAR ( OC_FILE_U16 | OC_VAR_U8, 1, &_age_cargo_skip_counter ),
+	OCL_VAR ( OC_UINT16,   1, &_tick_counter ),
+	OCL_VAR (   OC_TILE,   1, &_cur_tileloop_tile ),
+
+	OCL_ASSERT( OC_TTO, 0x3A2E ),
+
+	OCL_CHUNK( 49, LoadOldPrice ),
+
+	OCL_ASSERT( OC_TTO, 0x3B4E ),
+
+	OCL_CHUNK( 12, LoadOldCargoPaymentRate ),
+
+	OCL_ASSERT( OC_TTD, 0x4CBA ),
+	OCL_ASSERT( OC_TTO, 0x3BA6 ),
+
+	OCL_CHUNK( 1, LoadOldMapPart1 ),
+
+	OCL_ASSERT( OC_TTD, 0x48CBA ),
+	OCL_ASSERT( OC_TTO, 0x23BA6 ),
+
+	OCL_CCHUNK( OC_TTD, 250, LoadOldStation ),
+	OCL_CCHUNK( OC_TTO, 200, LoadOldStation ),
+
+	OCL_ASSERT( OC_TTO, 0x29E16 ),
+
+	OCL_CCHUNK( OC_TTD, 90, LoadOldIndustry ),
+	OCL_CCHUNK( OC_TTO, 100, LoadOldIndustry ),
+
+	OCL_ASSERT( OC_TTO, 0x2ADB6 ),
+
+	OCL_CHUNK(  8, LoadOldCompany ),
+
+	OCL_ASSERT( OC_TTD, 0x547F2 ),
+	OCL_ASSERT( OC_TTO, 0x2C746 ),
+
+	OCL_CCHUNK( OC_TTD, 850, LoadOldVehicle ),
+	OCL_CCHUNK( OC_TTO, 800, LoadOldVehicle ),
+
+	OCL_ASSERT( OC_TTD, 0x6F0F2 ),
+	OCL_ASSERT( OC_TTO, 0x45746 ),
+
+	OCL_VAR ( OC_TTD | OC_UINT8 | OC_DEREFERENCE_POINTER, 32 * 500, &_old_name_array ),
+	OCL_VAR ( OC_TTO | OC_UINT8 | OC_DEREFERENCE_POINTER, 24 * 200, &_old_name_array ),
+
+	OCL_ASSERT( OC_TTO, 0x46A06 ),
+
+	OCL_NULL( 0x2000 ),            ///< Old hash-table, no longer in use
+
+	OCL_CHUNK( 40, LoadOldSign ),
+
+	OCL_ASSERT( OC_TTO, 0x48C36 ),
+
+	OCL_CCHUNK( OC_TTD, 256, LoadOldEngine ),
+	OCL_CCHUNK( OC_TTO, 103, LoadOldEngine ),
+
+	OCL_ASSERT( OC_TTO, 0x496AC ),
+
+	OCL_VAR ( OC_UINT16,    1, &_vehicle_id_ctr_day ),
+
+	OCL_CHUNK(  8, LoadOldSubsidy ),
+
+	OCL_ASSERT( OC_TTO, 0x496CE ),
+
+	OCL_VAR ( OC_FILE_U16 | OC_VAR_U32,   1, &_next_competitor_start ),
+
+	OCL_CNULL( OC_TTO, 2 ),  ///< available monorail bitmask
+
+	OCL_VAR ( OC_FILE_I16 | OC_VAR_I32,   1, &_saved_scrollpos_x ),
+	OCL_VAR ( OC_FILE_I16 | OC_VAR_I32,   1, &_saved_scrollpos_y ),
+	OCL_VAR ( OC_FILE_U16 | OC_VAR_U8,    1, &_saved_scrollpos_zoom ),
+
+	OCL_VAR ( OC_FILE_U32 | OC_VAR_I64,   1, &_economy.max_loan ),
+	OCL_VAR ( OC_FILE_U32 | OC_VAR_I64,   1, &_economy.max_loan_unround ),
+	OCL_VAR (  OC_INT16,    1, &_economy.fluct ),
+
+	OCL_VAR ( OC_UINT16,    1, &_disaster_delay ),
+
+	OCL_ASSERT( OC_TTO, 0x496E4 ),
+
+	OCL_CNULL( OC_TTD, 144 ),             ///< cargo-stuff, calculated in InitializeLandscapeVariables
+
+	OCL_CCHUNK( OC_TTD, 256, LoadOldEngineName ),
+
+	OCL_CNULL( OC_TTD, 144 ),             ///< AI cargo-stuff, calculated in InitializeLandscapeVariables
+	OCL_NULL( 2 ),               ///< Company indexes of companies, no longer in use
+
+	OCL_VAR ( OC_FILE_U8 | OC_VAR_U16,    1, &_station_tick_ctr ),
+
+	OCL_VAR (  OC_UINT8,    1, &_settings_game.locale.currency ),
+	OCL_VAR (  OC_UINT8,    1, &_settings_game.locale.units ),
+	OCL_VAR ( OC_FILE_U8 | OC_VAR_U32,    1, &_cur_company_tick_index ),
+
+	OCL_NULL( 2 ),               ///< Date stuff, calculated automatically
+	OCL_NULL( 8 ),               ///< Company colors, calculated automatically
+
+	OCL_VAR (  OC_UINT8,    1, &_economy.infl_amount ),
+	OCL_VAR (  OC_UINT8,    1, &_economy.infl_amount_pr ),
+	OCL_VAR (  OC_UINT8,    1, &_economy.interest_rate ),
+	OCL_NULL( 1 ), // available airports
+	OCL_VAR (  OC_UINT8,    1, &_settings_game.vehicle.road_side ),
+	OCL_VAR (  OC_UINT8,    1, &_settings_game.game_creation.town_name ),
+
+	OCL_CHUNK( 1, LoadOldGameDifficulty ),
+
+	OCL_ASSERT( OC_TTD, 0x77130 ),
+
+	OCL_VAR (  OC_UINT8,    1, &_settings_game.difficulty.diff_level ),
+
+	OCL_VAR ( OC_TTD | OC_UINT8,    1, &_settings_game.game_creation.landscape ),
+	OCL_VAR ( OC_TTD | OC_UINT8,    1, &_trees_tick_ctr ),
+
+	OCL_CNULL( OC_TTD, 1 ),               ///< Custom vehicle types yes/no, no longer used
+	OCL_VAR ( OC_TTD | OC_UINT8,    1, &_settings_game.game_creation.snow_line ),
+
+	OCL_CNULL( OC_TTD, 32 ),              ///< new_industry_randtable, no longer used (because of new design)
+	OCL_CNULL( OC_TTD, 36 ),              ///< cargo-stuff, calculated in InitializeLandscapeVariables
+
+	OCL_ASSERT( OC_TTD, 0x77179 ),
+	OCL_ASSERT( OC_TTO, 0x4971D ),
+
+	OCL_CHUNK( 1, LoadOldMapPart2 ),
+
+	OCL_ASSERT( OC_TTD, 0x97179 ),
+	OCL_ASSERT( OC_TTO, 0x6971D ),
+
+	/* Below any (if available) extra chunks from TTDPatch can follow */
+	OCL_CHUNK(1, LoadTTDPatchExtraChunks),
+
+	OCL_END()
+};
+
+bool LoadTTDMain(LoadgameState *ls)
+{
+	_read_ttdpatch_flags = false;
+	_ttdp_version = 0;
+
+	DEBUG(oldloader, 3, "Reading main chunk...");
+	/* Load the biggest chunk */
+	SmallStackSafeStackAlloc<byte, OLD_MAP_SIZE * 2> map3;
+	_old_map3 = map3.data;
+	_old_vehicle_names = NULL;
+	if (!LoadChunk(ls, NULL, main_chunk)) {
+		DEBUG(oldloader, 0, "Loading failed");
+		free(_old_vehicle_names);
+		return false;
+	}
+	DEBUG(oldloader, 3, "Done, converting game data...");
+
+	FixTTDMapArray();
+
+	/* Fix some general stuff */
+	_settings_game.game_creation.landscape = _settings_game.game_creation.landscape & 0xF;
+
+	/* Remap some pointers */
+	_cur_town_ctr      = RemapTownIndex(_old_cur_town_ctr);
+
+	/* Fix the game to be compatible with OpenTTD */
+	FixOldTowns();
+	FixOldVehicles();
+
+	/* We have a new difficulty setting */
+	_settings_game.difficulty.town_council_tolerance = Clamp(_settings_game.difficulty.diff_level, 0, 2);
+
+	DEBUG(oldloader, 3, "Finished converting game data");
+	DEBUG(oldloader, 1, "TTD(Patch) savegame successfully converted");
+
+	free(_old_vehicle_names);
+
+	return true;
+}
+
+bool LoadTTOMain(LoadgameState *ls)
+{
+	DEBUG(oldloader, 3, "Reading main chunk...");
+
+	SmallStackSafeStackAlloc<byte, 103 * sizeof(Engine)> engines; // we don't want to call Engine constructor here
+	_old_engines = (Engine *)engines.data;
+	SmallStackSafeStackAlloc<StringID, 800> vehnames;
+	_old_vehicle_names = vehnames.data;
+
+	/* Load the biggest chunk */
+	if (!LoadChunk(ls, NULL, main_chunk)) {
+		DEBUG(oldloader, 0, "Loading failed");
+		return false;
+	}
+	DEBUG(oldloader, 3, "Done, converting game data...");
+
+	if (_settings_game.game_creation.town_name != 0) _settings_game.game_creation.town_name++;
+
+	_settings_game.game_creation.landscape = 0;
+	_trees_tick_ctr = 0xFF;
+
+	_cur_town_ctr = RemapTownIndex(_old_cur_town_ctr);
+
+	if (!FixTTOMapArray() || !FixTTOEngines()) {
+		DEBUG(oldloader, 0, "Conversion failed");
+		return false;
+	}
+
+	FixOldTowns();
+	FixOldVehicles();
+	FixTTOCompanies();
+
+	/* We have a new difficulty setting */
+	_settings_game.difficulty.town_council_tolerance = Clamp(_settings_game.difficulty.diff_level, 0, 2);
+
+	DEBUG(oldloader, 3, "Finished converting game data");
+	DEBUG(oldloader, 1, "TTO savegame successfully converted");
+
+	return true;
+}