Mission files

MIS/MISS000.DAT ... MISS040.DAT

One file per campaign mission: scenario settings, the map, facilities, timed actions and deferred map changes.

A campaign mission is one MIS/MISS###.DAT file. A fixed header gives the offsets of five sections: MISS (scenario settings and rule tables), ACTN (the map: terrain, overlay and unit planes), SHOP (facilities and starting cargo), MAP\0 (timed actions: weather, announcements, win and loss rules) and DFxx (map changes applied later). All integers are little-endian. Every byte of the 24 shipped campaign files has a place in the layout; a few fields are still not understood, and the page says which.

Header278 bytesMSSNchar[4]missOffsetu32le mapOffsetu32le shopOffsetu32le actnOffsetu32le dfLayerCountu16le dfOffsetsPlus4u32le[32]dfSizesu32le[32]MISS332 bytesMISSchar[4]Identity6 B Sides11 B Campaign6 B Indexed pair11 B Mission result10 B Movement64 B Combat64 B Production128 B Startup and next-mission result path3 B Unknown / reserved25 BACTN2,312–21,512 bytesACTNchar[4]widthu16le heightu16leterraini16le[]overlayi16le[]unitsi16le[]SHOP246–7,446 bytesSHOPchar[4]record_countu16leShopRecord × record_count80 bytes eachType and place12 B Name and owner4 B Economy10 B Contents40 B AI command row (type 2)8 B Unknown / reserved6 BMAP164–1,244 bytesMAP\0char[4]MapActionRecord × (size − 4) / 4040 bytes eachCondition6 B Action4 B Operands8 B Unknown / reserved22 BDFxx20–516 bytesDFxxchar[4]DfCellRecord × (size − 4) / 88 bytes eachCell patch8 B

Each box is one part of the file, in file order, split into the groups of the structure below. A block is as wide as its bytes where its label fits. ACTN, SHOP, MAP and DFxx vary in length (the range is across the campaign): a stack stands for the records of that section, and its label gives the record count. Dashed blocks (the tags) hold the same string in every file. A line means one field decides where a section starts or how large another block is; the label says how, and field, line and section share a shade.

German and English text

The English edition has clear mission-text errors: mission 11 uses mission 12’s translated text, and mission 12 remains in German. German matches the mission facility data, but also has missing entries. Other differences below are changes in meaning; they are not all established errors.

Mission text lives in ENG/MISS###.TXT (key-table format, TPWM-compressed). The German edition carries the same file names under GER/. The two editions were compared record by record (26 campaign MISS###.TXT, GAME.TXT, UNIT000.TXT, and the 123 non-empty ATXT000 messages). The German overlay has no .DAT files, so every statement about layout below uses the English install's MIS/MISS###.DAT.

MISS011 / MISS012: the English text files are shifted

File	English install	German overlay
`MISS011.TXT`	36 entries. Title "ATTACKING TITAN-NET'S HEADQUARTERS WITH REBEL SUPPORT" / "TITAN-NET IN SIGHT"; names `AIR-3020`, `FELP`, `TUPP`, ... `HQ-KAIS`.	26 entries. Title "5 ARMEEN TREFFEN AUFEINANDER." / "DIE KAI-HALBINSEL"; names `XEGO`, `HQ`, `CELLERUS`, ..., `HQ DER REBELLEN`, `HQ-0081`.
`MISS012.TXT`	German text, byte-for-byte the same entries as the German `MISS012.TXT`.	36 entries: "MIT UNTERSTÜTZUNG DER REBELLEN GEGEN TITAN NETS HAUPTQUARTIER." / "TITAN NET IN SICHT"; same name list as the English `MISS011.TXT`.

So the English MISS011.TXT is the translation of the German MISS012.TXT, the English MISS012.TXT is that same German file untranslated, and the German MISS011.TXT has no English counterpart.

Which text fits which .DAT was decided from facility records (type-1 SHOP records, nameId = key in the mission's text file). The discriminating records:

Record	`MISS011.DAT`: (x,y) side function, buildable units	English `MISS011.TXT`	German `MISS011.TXT`	`MISS012.DAT`: same `nameId`	English = German `MISS012.TXT`
#3	(2,31) side 1, HQ (`shopFunction` 1)	`FELP`	`HQ`	(20,2) side 1, depot (16)	`FELP`
#6	(36,36) side 2, HQ	`PITEGH`	`HQ-0081`	(25,8) side 64, depot	`PITEGH`
#7	(37,15) side 4, HQ	`HOLWE`	`HQ DER REBELLEN`	(2,8) side 1, depot	`HOLWE`
#8	(32,19) side 4, function 2 with ground vehicles `8,16,9,18`	`HQ`	`ATC-4477`	(14,7) side 1, HQ	`HQ`
#15	(3,34) side 1, factory (8)	`TITAN-NET'S HQ`	`CMP-4308`	(34,31) side 2, HQ	`HQ TITAN NET`
#18	(20,20) side 2, function 2 with ground vehicles `7,52,9,11`	`AIR-3023`	`KAI-NET-WERKE`	(32,34) side 2, function 2 with planes	`AIR-3023`
#19	(30,33) side 2, ground vehicles `11,52,16,15`	`AIR-3024`	`SAMURAI-2 FABRIK`	(36,34) side 2, planes	`AIR-3024`
#20	(23,37) side 2, planes `35,41,38,31`	`PERWOR`	`KAI-NET AIRPORT`	(36,38) side 2, depot	`PERWOR`
#21	(21,7) side 16, planes `38,39,31,34`	`ATC-2013`	`POLUWA AIRPORT`	(3,13) side 16, ground vehicles	`ATC-2013`
#22	(3,2) side 16, ships `50,48,42,49`	`WEX`	`KERKRART-WERFT`	(7,13) side 16, depot	`WEX`
#31	(absent: `MISS011.DAT` has records `2..25`)	`HQ-KAIS`	(absent)	(7,33) side 16, HQ	`HQ-KAIS`

Bold marks the name that fits the record. Counted over shopFunction = 1 (HQ) records:

`.DAT`	English `MISS011.TXT`	German `MISS011.TXT`	`MISS012.TXT` (either language)
`MISS011.DAT` (3 HQs)	0 / 3 named HQ	3 / 3	0 / 3
`MISS012.DAT` (3 HQs)	3 / 3	0 / 3 (10 records have no name at all)	3 / 3

Further support:

MISS011.DAT has five owner sides (1,2,4,8,16), matching "5 ARMEEN"; MISS012.DAT has six masks (1,2,4,8,16, plus 64 neutral).
The German names fit the *kind* of facility on every shipyard, airport and factory record above (-WERFT on the ship builder, AIRPORT on both plane builders, FABRIK/-WERKE on the two ground-vehicle builders). The English names do not.
The ATXT204 chapter-III briefing (Kai Peninsula, "three hostile armies" plus rebels) describes the MISS011 map, not the "Titan-Net in sight" scenario.

Conclusion (status: known for the data pairing, unverified at runtime): MISS011.DAT belongs with the German MISS011.TXT; MISS012.DAT belongs with MISS012.TXT. The English install ships neither correct file for mission 11. MISS011.TXT carries mission 12's translated title and names, so mission 11 would show "FELP" on its own HQ and a title describing the next mission, and mission 12 would show German title and names. The Kai Peninsula text has no English version in this install. Open: confirm in the running English game that mission 11 shows FELP/HOLWE/PITEGH on its HQs and mission 12 a German title.

Other differences in meaning

Briefing messages (ENG/ATXT000.LIB, text id in the first column):

Id	English	German	Effect
095	"we should not attack Titan-Net's headquarters directly"	"wir gehen jetzt dazu über, das Hauptquartier ... direkt anzugreifen"	Opposite advice. Both objectives say to occupy the HQ; that objective alone does not decide whether the attack should be direct.
052	Objectives: Pem Pont, Texol	Objectives: Pem Pont, Texol, HQ Titan-Nets	German lists a third objective. The mission requires all three capture conditions, so the English objective list is incomplete.
018	Wipe out all DEMON and RANGER units	All DEMON units	English adds RANGER. Pank plus destruction of enemy DEMON units can satisfy the mission without destroying every RANGER; German matches this route.
019	"tank units ... in some of the depots"	"Panzerzüge" (armoured trains); HQ of Titan-Net's 32nd Army	Different unit; English drops the owner.
024	"We know how to reach you"	"den Weg zu Ihrer Heimat"	German names the home as the target.
031	"Bay of Maxis"	"Bucht von Meltix"	English contradicts its own chapter I text (Meltix).
039	Speaker: Intelligence Section	Speaker: Verteidigungsrat	Different sender.
071	naval base "in your sector"	"im nordwestlichen Bereich"	German gives a direction.
087	Khun Kaap, Durag's Adjutant	"Adjutantin"	German states female.
201	"The Plot collapses"	"Der Verrat bricht zusammen"	Plot vs betrayal.
202	ROOM "disconnected ... sabotaged"	ROOM "vom Feind unterwandert" (infiltrated)	Different cause.
240	"Walter had made his decision"; "Chairperson"	"Val hatte ..."; "Vorsitzender"	Name; gender.
255	tested "the Drullian people"	tested their "Einigkeit" (unity)	Nuance.

Untranslated or missing entries: English ATXT207 (chapter heading) and ATXT236 contain German; ATXT254 is German in both; MISS035 entry 26 is empty in German; ATXT023 and ATXT047 are header-only in German.

Unit and place names:

Source	English	German
`UNIT000` 9	ARMOURED CAR	SCHÜTZENPANZER (infantry fighting vehicle)
`UNIT000` 11	MAIN BATTLE TANK	SCHWERER PANZER (heavy tank)
`UNIT000` 12	ARTILLERY	S.HAUBITZE (heavy howitzer)
`UNIT000` 13	ASSAULT TANK	STURMGESCHÜTZ (assault gun)
`UNIT000` 15	ANTI RADAR VEHIC	ELOKA-STÖRTRUPPE (jamming troop)
`UNIT000` 50	TORPEDO BOAT	ZERSTÖRER (destroyer)
`MISS007` 21	ROCKETLAUNCHER-W.	RAKETENPANZER-W.
`MISS008` 22	TITAN-NET'S NORTHERN HQ	HQ NO-TITAN NET (north-east)
`MISS016` 26	HALMAX SHIPYARDS	HALMAX-WERKE (works)

GAME.TXT, NET.TXT and BLUENET.TXT show no differences in meaning. Spelling drift only: Haris/Harris, Rekkronto/Rekkrontro, Chromsom/Chromson, Gelvet/Gelwet, Trendon/Trentan/Tentan. Not compared: the Scenery missions (no English mission texts in the local install) and the speech audio.

File Header

278 bytes8 fields● 8 ◐ 0 ○ 0

0x0000char[4]tag ●Literal MSSN.

Section offsets

4 fields · 16 bytes

0x0004u32lemissOffset ●Absolute file offset of the MISS metadata section.

0x0008u32lemapOffset ●Absolute file offset of the MAP\0 action-record section.

0x000cu32leshopOffset ●Absolute file offset of the SHOP place/facility section.

0x0010u32leactnOffset ●Absolute file offset of the ACTN map-plane section.

Deferred layers

3 fields · 258 bytes

0x0014u16ledfLayerCount ●Number of declared DFxx offset/size entries.

0x0016u32le[32]dfOffsetsPlus4 ●One file offset per deferred layer, each stored 4 too high.

0x0096u32le[32]dfSizes ●Byte size of each DFxx layer, tag included, in the same order as dfOffsetsPlus4.

MISS Section

332 bytes26 fields● 14 ◐ 10 ○ 2values from 24 campaign missions, MISS section

0x0000MISS 0 0x0020 0x0040 0x0060 0x0080 0x00a00x00c00x00e00x0100 0x0120 0x0140

Point at the bar to name a field; select it to jump to its row.

knownpartly knownunknown: investigatenamed, never setalways one valueunused bits

0x0000char[4]tag ●Literal MISS.

Identity

3 fields · 6 bytes

0x0004u16letitleTextId ●0 · 2Text id for scenario title, resolved against ENG/MISS###.TXT.

0x0006u16leforceTextId ●1 · 3Text id for the force/player label.

0x012au16leselfMissionId ●0–4024 distinct valuesThe mission's own file id, stored a second time.

Sides

4 fields · 11 bytes

0x0008u16leside_selection_mask ◐Side masksA mask over sides, shipped as 16, 19, 28 and 31.

1514131211109876543210

5 named2 named but never set9 unused

bit	mask	name	meaning
0	0x0001	side 0	Blue: the player in campaign missions.
1	0x0002	side 1	Red.
2	0x0004	side 2	Orange-yellow.
3	0x0008	side 3	Olive green.
4	0x0010	side 4	Grey-green.
5	0x0020	side 5never set in this field	Yellow. Owns units and facilities only in `MISS035`, `036`, `037` and `040`, so `owner_side_mask` sets it there; `side_selection_mask` never does.
6	0x0040	side 6never set in this field	Neutral (brown-grey): unowned buildings and units.
7–15		unused	Never set in any record.

0x000du8present_sides_mask ◐3–4311 distinct valuesA mask over sides: the sides that take part.

0x000eu8mission_side_mask ◐0–3010 distinct valuesA mask over sides.

0x0014bytes[7]alliances ●Who is allied with whom: byte s, bit n set means side s is allied with side n, and the table is symmetric (side n then lists side s too).

Campaign

3 fields · 6 bytes

0x000au16lenextMissionId ●1–999923 distinct valuesId of the campaign mission file that follows this one on completion; 9999 marks the final mission.

0x0010u8[2]resource_selector_pair ◐always 0Both bytes are zero in all 24 shipped missions.

0x0012u16lemusicWord ◐0 · 256 · 512 · 768The high byte selects the song archive LIB/SNG000..003.LIB.

Indexed pair

3 fields · 11 bytes

0x000cu8side_or_tail_pair_index ◐0 · 1 · 3Selects one byte from each of the five-byte tables indexed_tail_bytes_a and indexed_tail_bytes_b.

0x0124bytes[5]indexed_tail_bytes_a ◐Five bytes, one per value of side_or_tail_pair_index.

0x012cbytes[5]indexed_tail_bytes_b ◐Five bytes, one per value of side_or_tail_pair_index.

Mission result

3 fields · 10 bytes

0x000fu8terminal_condition_count_threshold ●1 · 2 · 3Threshold against the accumulated count of satisfied mission terminal conditions (action types 0x08..0x0e).

0x011cbytes[8]tail_script_ids_a ●Up to eight animation-script ids.

0x0129u8tail_byte_129 ◐Passed to a lookup in a later step.

Movement

2 fields · 64 bytes

0x001ci8[32]terrain_cost_table ●Movement cost for each terrain class.

0x003ci8[32]auxiliary_terrain_cost_table ◐A second per-terrain-class cost row.

Combat

2 fields · 64 bytes

0x005ci8[32]combat_initiative_percent_by_terrain_class ●Signed initiative modifier, in percent, for each selected terrain class.

0x007ci8[32]combat_damage_percent_by_terrain_class ●Signed weapon-damage modifier, in percent, for each selected terrain class.

Production

1 field · 128 bytes

0x009cu16le[64]unit_construction_flags ●One flags word per unit class id, 64 slots.

313029282726252423222120191817161514131211109876543210

2 named30 not listed

bit	mask	name	meaning
0	0x0001	factory list	The class may appear in the generic construction list.
1	0x0002	side condition	Also required when the construction list's side-mask condition is active. OLARIBU sets it for unit ids `3, 4, 6, 8, 10, 11, 12, 52`.
2–31		not listed	No name recorded.

Startup and next-mission result path

1 field · 3 bytes

0x0131bytes[3]tail_script_ids_b ●Three optional animation-script ids.

Unknown / reserved

3 fields · 25 bytes

0x001bu8intro_byte_1b ○Zero in all 24 shipped missions.

0x0134u16le[4]tail_zero_padding ●Zero across all 24 local campaign missions.

0x013cbytesunknown_tail_payload ○Zero in all 24 shipped missions.

ACTN Section

variable size6 fields● 6 ◐ 0 ○ 0

0x00char[4]tag ●Literal ACTN.

Planes

3 fields

0x0008..0x0008+cell_count*2-1i16le[]terrain ●cell_count = width * height; row-major terrain tile ids.

0x0008+cell_count*2..0x0008+cell_count*4-1i16le[]overlay ●width * height overlay tile ids; values < 1 are empty.

0x0008+cell_count*4..0x0008+cell_count*6-1i16le[]units ●width * height unit words, row-major; 0xffff (-1) marks an empty cell.

SHOP Section

variable size3 fields● 2 ◐ 1 ○ 0

0x00char[4]tag ●Literal SHOP.

Records

1 field

0x0006..0x0006+record_count*80-1repeat record_count x ShopRecordfacility_records ◐40 signed words per record.

ShopRecord

80 bytes21 fields● 7 ◐ 13 ○ 1values from 24 campaign missions, SHOP section

0x00 0 0x28 0 0

Point at the bar to name a field; select it to jump to its row.

knownpartly knownunknown: investigatenamed, never setalways one valueunused bits

Type and place

6 fields · 12 bytes

0x00i16lerecord_type_flags ●1 · 2Only 1 and 2 occur in the 1,081 records.

0x02u16lepacked_position ●65–3931812 distinct valuesCell position as x + y * factor.

0x04i16leshopFunction ◐Shop functionsObserved values are 0, 1, 2, 4, 8, 16, 32.

1514131211109876543210

6 named10 unused

bit	mask	name	meaning
0	0x0001	HQ	Headquarters (33).
1	0x0002	airport or harbour	Where aircraft or ships are built and enter (135).
2	0x0004	depot	(14).
3	0x0008	academy	(38).
4	0x0010	city or village	(221).
5	0x0020	loaded transport	A carrier already holding cargo, not a building (22).
6–15		unused	Never set in any record.

0x06i16lefacility_creation_arg ◐always 0Zero in all 1,081 nonempty campaign SHOP records.

0x0ai16leactive_packed_position_copy ◐0–3931420 distinct valuesA second copy of the position: it equals packed_position in all 465 base-game records whose last contents word is -1, and is zero in all 616 whose last word is 0.

0x32u16lefacility_or_carrier_category ◐Facility categoriesOn 440 of 441 building records the high byte is one facility-category bit, the same vocabulary as the unit class shop_mask; a unit may enter only when its mask has the matching bit.

1514131211109876543210

8 named5 set but unnamed3 unused

bit	mask	name	meaning
0	0x0001	unnamed	Meaning unknown. Set in 1 of 1081.
1	0x0002	unnamed	Meaning unknown. Set in 1 of 1081.
5	0x0020	unnamed	Meaning unknown. Set in 1 of 1081.
6	0x0040	unnamed	Meaning unknown. Set in 9 of 1081.
7	0x0080	unnamed	Meaning unknown. Set in 1 of 1081.
8	0x0100	HQ	Headquarters.
9	0x0200	airport
10	0x0400	harbour
11	0x0800	factory
12	0x1000	depot
13	0x2000	city
14	0x4000	academy
15	0x8000	special facility
2–4		unused	Never set in any record.

Name and owner

2 fields · 4 bytes

0x08i16lenameId ●0–5050 distinct valuesText id in ENG/MISS###.TXT.

0x40i16leowner_side_mask ◐Side masksThe owning side as a single bit.

1514131211109876543210

7 named1 set but unnamed8 unused

bit	mask	name	meaning
0	0x0001	side 0	Blue: the player in campaign missions.
1	0x0002	side 1	Red.
2	0x0004	side 2	Orange-yellow.
3	0x0008	side 3	Olive green.
4	0x0010	side 4	Grey-green.
5	0x0020	side 5	Yellow. Owns units and facilities only in `MISS035`, `036`, `037` and `040`, so `owner_side_mask` sets it there; `side_selection_mask` never does.
6	0x0040	side 6	Neutral (brown-grey): unowned buildings and units.
7	0x0080	unnamed	Meaning unknown. Set in 1 of 1081.
8–15		unused	Never set in any record.

Economy

6 fields · 10 bytes

0x0ci16leinitial_energy ◐0–9027 distinct valuesThe facility's starting energy limit, read when the construction list is built.

0x0ei16leinitial_material ◐0–7039 distinct valuesThe facility's starting material limit, read when the construction list is built.

0x10i8facility_energy_increment ●Signed energy income of this facility, added to its owning side's total when the incoming-owner update includes facility rates.

0x11i8facility_material_increment ●Signed material income of this facility, added to its current material by the incoming-owner update when that update includes facility rates.

0x3ci16lecapacity_state ◐always 0Zero in all 1,081 nonempty campaign records.

0x3ei16leunidentified_facility_word_3e ◐0–94086 distinct valuesAn unidentified word that is not the owner.

2 fields · 40 bytes

0x12i16le[16]contents_slots ●-1–5343 distinct valuesSixteen positions for starting unit class ids.

0x34i16le[4]construction_unit_ids ●0–5235 distinct valuesUp to four extra unit class ids appended to this facility's generic production list.

AI command row (type 2)

4 fields · 8 bytes

0x48i16letype2_extension_word_0 ◐0–189 distinct valuesObserved values: 0, 1, 2, 4, 8, 9, 12, 17, 18.

0x4ai16letype2_extension_word_1 ◐0 · 5 · 6 · 7 · 10 · 20Observed values: 0, 5, 6, 7, 10, 20; 10 occurs in 596 records.

0x4ci16letype2_extension_word_2 ◐0–23319 distinct valuesObserved values: 0, 105, 137, 342, 793, 1556, 1808, 2327, 2331.

0x4ei16letype2_extension_word_3 ◐0 · 4 · 7 · 794 · 1350Observed values: 0, 4, 7, 794, 1350.

Unknown / reserved

1 field · 6 bytes

0x42i16le[3]zero_extension_words ○always 0All three words are zero in every shipped record, and nothing is known to read them.

MAP Section

variable size2 fields● 1 ◐ 1 ○ 0

0x00char[4]tag ●Literal MAP\0: MAP plus a NUL terminator.

Records

1 field

0x0004..firstDfOffset-1repeat action_record_count x MapActionRecordaction_records ◐action_record_count = (firstDfOffset - mapOffset - 4) / 40; the section ends where the first DFxx section begins.

MapActionRecord

40 bytes12 fields● 6 ◐ 5 ○ 1values from 24 campaign missions, MAP section

0x00 0 0 0

Point at the bar to name a field; select it to jump to its row.

knownpartly knownunknown: investigatenamed, never setalways one valueunused bits

Condition

3 fields · 6 bytes

0x00u16lecategory_or_scope ◐0 · 48 · 80Corpus values are 0, 0x30, and 0x50.

0x02u16leturn ●0–3027 distinct valuesCopied by parser and insertion to entry +0x0c; second-pass scheduling requires signed entry turn <= signed manager turn +0x12.

0x04u16letrigger_group_or_side ●0–1212 distinct valuesCopied through insertion to entry +0x0a; second-pass scheduling requires signed entry event <= signed manager event +0x10.

Action

3 fields · 4 bytes

0x06u8action_selector ●Copied to entry +0x0e.

0x07u8action_type ●The action kind; the game dispatches on this byte.

0x08u16leduration_or_count ●0 · 100Copied to entry +0x06, the unsigned low sequence ceiling; entry +0x08 is its signed high word.

Operands

4 fields · 8 bytes

0x0au16leaction_param_a ●always 0Zero in all 364 shipped action records.

0x0cu16leaction_param_b ◐0–9898 distinct valuesFamily-specific operand: type 0x04 DF index, 0x05/06/07 side number, 0x0d returned request word; type 0x02 weather state; type 0x03 ASCR scene id; type 0x07 side whose alliance row changes; type 0x08 target side; type 0x09 requested facility-owner side; type 0x0a maximum mission turn count; type 0x0c target unit class id.

0x0eu16leaction_param_c ◐0–2717 distinct valuesFamily-specific operand: 0x05 signed energy delta, 0x06 native facility ordinal; 0x0900 native facility ordinal (not a universal SHOP-array index); 0x0c00 target unit side id.

0x10u16leaction_param_d ◐0 · 1Usually zero; the only nonzero shipped value is 1, in MISS003.DAT MAP record 4 (0x0704).

Unknown / reserved

2 fields · 22 bytes

0x12u16le[3]copied_zero_action_words ◐always 0All three words are zero in the shipped records.

0x18u16le[8]unread_map_record_tail ○always 0All eight words are zero in the shipped records, and the game never reads this part of the record.

DFxx Layers

variable size2 fields● 1 ◐ 1 ○ 0

Records

1 field

0x0004..df_size-1repeat df_record_count x DfCellRecorddeferred_cells ◐Sparse map edits.

DfCellRecord

8 bytes4 fields● 4 ◐ 0 ○ 0

0x00

Point at the bar to name a field; select it to jump to its row.

knownpartly knownunknown: investigatenamed, never setalways one valueunused bits

Cell patch

4 fields · 8 bytes

0x00u16lepacked_position ●Padded native cell index; the writer uses P for byte base/overlay planes and P*2 for word occupancy.

0x02i16leterrain ●Compare raw word with source-ID word of each loaded 46-byte PART row; first match writes compact ordinal to base byte plane.

0x04i16leoverlay ●Same source-ID lookup; write matching compact ordinal, or ff when no row matches.

0x06i16leunit ●ffff requests no creation.

Reference: terrain classes

Bit n of a terrain record's entry mask names a terrain class (see Terrain records). The four per-class rows in the MISS section (terrain_cost_table, auxiliary_terrain_cost_table, combat_initiative_percent_by_terrain_class and combat_damage_percent_by_terrain_class) are indexed by that bit. The values below are the row every shipped mission carries.

Bit	Terrain class	Main cost	Auxiliary cost	Combat initiative %	Combat damage %
0	road	0	0	+50	0
1	path	8	0	+30	0
2	ditch	20	4	+90	+50
3	rail	10	0	0	0
4	minor obstacle	16	4	−30	+40
5	major obstacle	20	16	−10	+30
6	hill	24	24	−20	+50
7	mountain	38	32	−40	+60
8	slope	26	8	−15	+25
9	grassland	12	0	0	0
10	forest	16	16	−20	+40
11	hazard	120	4	−95	−20
12	water basin	30	0	−60	−10
13	mud	32	0	−40	−30
14	snow	20	0	−10	−20
15	rock in water	16	4	−10	−10
16	shallow water	0	0	0	0
17	medium water	0	0	0	0
18	deep water	0	0	0	0
19	unnamed	8	0	+40	−10
20	building	120	16	0	0
21	building (enterable)	16	8	0	+30
22	building entrance	0	16	0	0
23..31	unused in shipped entry masks	0	0	0	0

The class names describe common base-tile uses of each bit; they are not exclusive. The two cost columns are local threshold values, not amounts summed along a route. The two percentage columns are the raw mission values; difficulty decides whether they are applied.

Reference: MAP action types and selectors

The stored word 0xTTSS at bytes 0x06..0x07 of a MapActionRecord is the action type TT and the selector SS; 0x0201 and 0x0202 are the same type with different selectors, not separate subtypes. In the table, word[n] is the n-th 16-bit word of the 40-byte record: word[1] is turn, word[6] is action_param_b, word[7] is action_param_c and word[8] is action_param_d.

Stored word	Count	Current role	Evidence in play	Notes
`0x0201`	90	global weather change, selector `1`	confirmed in play	`word[6]` selects the weather: `0` clear, `1` light rain, `2` heavy rain, `3` light snow, `4` heavy snow. All five states were seen in AMPORGE. Value `5` occurs three times in ULUARGE, but the game's weather routine rejects values outside `0..4` and leaves the weather unchanged.
`0x0202`	3	global weather change, selector `2`	type confirmed in play; selector 2 untested	WAGOPAY uses selector 2 with weather values `1`, `2` and `0`. Selector 2 has not been tested against selector 1 in play.
`0x0301`	155	mission announcement/report	confirmed in play	`word[6]` selects the animation script `ASCR###`; the script's `write(...)` calls select the `ATXT###` text archives.
`0x0320`	13	mission announcement/report, selector `0x20`	same shape as `0x0301`; selector difference untested	The same script-selection field as selector `1`; the difference between the selectors has not been tested.
`0x0401`	7	deferred DF-layer activation, selector `1`	original executable bytes	Activates a `DFxx` layer: `word[1]` is the turn and `word[6]` the layer index. These 7 actions cover 7 of the 9 genuine layers; ULUARGE and DAFATWA have a layer with no activation record. No placeholder-layer mission has one.
`0x0704`	1	alliance change for one side, selector `4`	not tested in play	Seen once, in `MISS003.DAT` record 4 at turn 16. Type `0x07` selects the side row from `word[6]`, clears the bit for `word[8]` and adds the bit for `word[7]` in the table at `alliances`. The stored values `2, 0, 1` therefore take side 1 out of side 2's row and add side 0 (already there): side 2 stops being allied with side 1 and stays with side 0. A player-visible test is open.
`0x0800`	14	side-elimination terminal condition	confirmed in play	`word[6]` is the target side; true when no active unit of that side has class bit 29 clear. Contained units count; strength is not tested. Category `0x30` is success, category `0x50` is failure.
`0x0900`	56	facility-ownership terminal condition	confirmed in play	`word[6]` is the requested owner side and `word[7]` the `SHOP` record index; the condition tests plain ownership of any facility. Category `0x30` is success, category `0x50` is failure.
`0x0a00`	19	mission turn-limit failure condition	confirmed in play	Category `0x50`. `word[6]` is the maximum mission turn count (campaign values `15..60`) and `word[7]` is zero. The exact predicate is signed native manager turn >= signed B. Visible-turn conversion needs a counted-turn/context binding.
`0x0a01`	1	mission turn-limit failure condition, selector `1`	confirmed in play	Category `0x50`. The same dispatched type as `0x0a00`; the only one is in `MISS015.DAT` with `word[6] = 35`.
`0x0c00`	5	matching-unit terminal condition	confirmed in play; polarity depends on the category	`word[6]` is a unit class and `word[7]` its side. Category `0x30` is a destroy-all-matching-units success rule, and repeated blocks are separate one-shot counted conditions; mission threshold controls the aggregate result. Category `0x50` reads as a protect rule that fails when the matching units die; it still needs a normal-combat replay.

Example: an announcement in AMPORGE

MIS/MISS000.DAT is the first campaign mission, AMPORGE. Its MAP\0 section starts at the offset in the header word mapOffset (0x0c60 in this file), and each action record is 40 bytes after the 4-byte tag. Record 3 is the fourth: it starts at 0x0c60 + 4 + 3 x 40. Each line is one field: its offset in the record, its bytes as stored, and the value they decode to.

0x00  00 00                                      category_or_scope = 0
0x02  00 00                                      turn = 0
0x04  00 00                                      trigger_group_or_side = 0
0x06  01                                         action_selector = 1
0x07  03                                         action_type = 0x03: announcement
0x08  64 00                                      duration_or_count = 100
0x0a  00 00                                      action_param_a = 0
0x0c  11 00                                      action_param_b = 17: animation script ASCR017
0x0e  00 00                                      action_param_c = 0
0x10  00 00                                      action_param_d = 0
0x12  00 00 00 00 00 00                          copied_zero_action_words = 0, 0, 0
0x18  00 00 00 00 00 00 00 00 00 00 00 00 ...    unread_map_record_tail = 0 (16 bytes)

The stored word at 0x06 reads 0x0301: type 0x03, selector 1. The record fires at turn 0, so the announcement plays as the mission opens. It names script ASCR017 in action_param_b; that script shows General Odan's contact message. Record 4 has the same shape with script ASCR019, the objective briefing. A condition record such as record 1 (50 00 ... 08 00) has category 0x50 and type 0x08; it is a failure rule that names side 0, the player.

Example: a neutral city in AMPORGE

The same mission's SHOP section holds three records. Record 0 starts at shopOffset + 6 and is 80 bytes long. It is a type-1 record: a facility, here a city.

0x00  01 00                                      record_type_flags = 1: facility
0x02  d5 00                                      packed_position = 213: x 21, y 3
0x04  10 00                                      shopFunction = 0x0010: city or village
0x06  00 00                                      facility_creation_arg = 0
0x08  02 00                                      nameId = 2
0x0a  d5 00                                      active_packed_position_copy = 213
0x0c  14 00                                      initial_energy = 20
0x0e  1e 00                                      initial_material = 30
0x10  08                                         facility_energy_increment = 8
0x11  04                                         facility_material_increment = 4
0x12  ff ff ff ff ff ff ff ff ff ff ff ff ...    contents_slots = -1 x 16 (empty)
0x32  00 20                                      facility_or_carrier_category = 0x2000: city
0x34  00 00 00 00 00 00 00 00                    construction_unit_ids = 0, 0, 0, 0
0x3c  00 00                                      capacity_state = 0
0x3e  2c 01                                      unidentified_facility_word_3e = 300
0x40  40 00                                      owner_side_mask = 0x0040: side 6, neutral
0x42  00 00 00 00 00 00                          zero_extension_words = 0, 0, 0
0x48  00 00                                      type2_extension_word_0 = 0
0x4a  00 00                                      type2_extension_word_1 = 0
0x4c  00 00                                      type2_extension_word_2 = 0
0x4e  00 00                                      type2_extension_word_3 = 0

The position 213 is 3 x 64 + 21, since the map is no wider or taller than 64. Nobody owns the city, so its side is the neutral side 6, and a plain city builds nothing: all four extra unit ids are zero and all sixteen contents positions are empty. It still produces: each turn it adds 8 energy and 4 material. The three type-2 words are unused here because they apply only to type-2 records, which annotate units already on the map.

Still to investigate

Every field marked unknown or partial above, and every bit that is set without a name or named without ever being set.

side_selection_mask◐A mask over sides, shipped as 16, 19, 28 and 31. Bit 5 (side 5), Bit 6 (side 6) are named but never set. MISS Section
side_or_tail_pair_index◐Selects one byte from each of the five-byte tables indexed_tail_bytes_a and indexed_tail_bytes_b. MISS Section
present_sides_mask◐A mask over sides: the sides that take part. MISS Section
mission_side_mask◐A mask over sides. MISS Section
resource_selector_pair◐Both bytes are zero in all 24 shipped missions. MISS Section
musicWord◐The high byte selects the song archive LIB/SNG000..003.LIB. MISS Section
intro_byte_1b○Zero in all 24 shipped missions. MISS Section
auxiliary_terrain_cost_table◐A second per-terrain-class cost row. MISS Section
indexed_tail_bytes_a◐Five bytes, one per value of side_or_tail_pair_index. MISS Section
tail_byte_129◐Passed to a lookup in a later step. MISS Section
indexed_tail_bytes_b◐Five bytes, one per value of side_or_tail_pair_index. MISS Section
unknown_tail_payload○Zero in all 24 shipped missions. MISS Section
facility_records◐40 signed words per record. SHOP Section
shopFunction◐Observed values are 0, 1, 2, 4, 8, 16, 32. ShopRecord
facility_creation_arg◐Zero in all 1,081 nonempty campaign SHOP records. ShopRecord
active_packed_position_copy◐A second copy of the position: it equals packed_position in all 465 base-game records whose last contents word is -1, and is zero in all 616 whose last word is 0. ShopRecord
initial_energy◐The facility's starting energy limit, read when the construction list is built. ShopRecord
initial_material◐The facility's starting material limit, read when the construction list is built. ShopRecord
facility_or_carrier_category◐On 440 of 441 building records the high byte is one facility-category bit, the same vocabulary as the unit class shop_mask; a unit may enter only when its mask has the matching bit. Bits 0–1, 5–7 are set but unnamed. ShopRecord
capacity_state◐Zero in all 1,081 nonempty campaign records. ShopRecord
unidentified_facility_word_3e◐An unidentified word that is not the owner. ShopRecord
owner_side_mask◐The owning side as a single bit. Bit 7 is set but unnamed. ShopRecord
zero_extension_words○All three words are zero in every shipped record, and nothing is known to read them. ShopRecord
type2_extension_word_0◐Observed values: 0, 1, 2, 4, 8, 9, 12, 17, 18. ShopRecord
type2_extension_word_1◐Observed values: 0, 5, 6, 7, 10, 20; 10 occurs in 596 records. ShopRecord
type2_extension_word_2◐Observed values: 0, 105, 137, 342, 793, 1556, 1808, 2327, 2331. ShopRecord
type2_extension_word_3◐Observed values: 0, 4, 7, 794, 1350. ShopRecord
action_records◐action_record_count = (firstDfOffset - mapOffset - 4) / 40; the section ends where the first DFxx section begins. MAP Section
category_or_scope◐Corpus values are 0, 0x30, and 0x50. MapActionRecord
action_param_b◐Family-specific operand: type 0x04 DF index, 0x05/06/07 side number, 0x0d returned request word; type 0x02 weather state; type 0x03 ASCR scene id; type 0x07 side whose alliance row changes; type 0x08 target side; type 0x09 requested facility-owner side; type 0x0a maximum mission turn count; type 0x0c target unit class id. MapActionRecord
action_param_c◐Family-specific operand: 0x05 signed energy delta, 0x06 native facility ordinal; 0x0900 native facility ordinal (not a universal SHOP-array index); 0x0c00 target unit side id. MapActionRecord
action_param_d◐Usually zero; the only nonzero shipped value is 1, in MISS003.DAT MAP record 4 (0x0704). MapActionRecord
copied_zero_action_words◐All three words are zero in the shipped records. MapActionRecord
unread_map_record_tail○All eight words are zero in the shipped records, and the game never reads this part of the record. MapActionRecord
deferred_cells◐Sparse map edits. DFxx Layers

/* MSSN Mission Format. All fields little-endian unless the type says otherwise.

* Each comment gives status (● known ◐ partial ○ unknown), values seen, and meaning. */

/* File Header */

struct FileHeader {

/*00*/chartag[4];// ● Literal MSSN.

/*04*/uint32_tmissOffset;// ● Absolute file offset of the MISS metadata section.

/*08*/uint32_tmapOffset;// ● Absolute file offset of the MAP\0 action-record section.

/*0c*/uint32_tshopOffset;// ● Absolute file offset of the SHOP place/facility section.

/*10*/uint32_tactnOffset;// ● Absolute file offset of the ACTN map-plane section.

/*14*/uint16_tdfLayerCount;// ● Number of declared DFxx offset/size entries.

/*16*/uint32_tdfOffsetsPlus4[32];// ● One file offset per deferred layer, each stored 4 too high.

/*96*/uint32_tdfSizes[32];// ● Byte size of each DFxx layer, tag included, in the same order as dfOffsetsPlus4.

}; /* 278 bytes */

/* MISS Section */

struct MissSection {

/*00*/chartag[4];// ● Literal MISS.

/*04*/uint16_ttitleTextId;// ● 0 · 2Text id for scenario title, resolved against ENG/MISS###.TXT.

/*06*/uint16_tforceTextId;// ● 1 · 3Text id for the force/player label.

/*08*/uint16_tside_selection_mask;// ◐ Side masksA mask over sides, shipped as 16, 19, 28 and 31.

/*0a*/uint16_tnextMissionId;// ● 1–9999Id of the campaign mission file that follows this one on completion; 9999 marks the final mission.

/*0c*/uint8_tside_or_tail_pair_index;// ◐ 0 · 1 · 3Selects one byte from each of the five-byte tables indexed_tail_bytes_a and indexed_tail_bytes_b.

/*0d*/uint8_tpresent_sides_mask;// ◐ 3–43A mask over sides: the sides that take part.

/*0e*/uint8_tmission_side_mask;// ◐ 0–30A mask over sides.

/*0f*/uint8_tterminal_condition_count_threshold;// ● 1 · 2 · 3Threshold against the accumulated count of satisfied mission terminal conditions (action types 0x08..0x0e).

/*10*/uint8_tresource_selector_pair[2];// ◐ always 0Both bytes are zero in all 24 shipped missions.

/*12*/uint16_tmusicWord;// ◐ 0 · 256 · 512 · 768The high byte selects the song archive LIB/SNG000..003.LIB.

/*14*/uint8_talliances[7];// ● Who is allied with whom: byte s, bit n set means side s is allied with side n, and the table is symmetric (side n then lists side s too).

/*1b*/uint8_tintro_byte_1b;// ○ Zero in all 24 shipped missions.

/*1c*/int8_tterrain_cost_table[32];// ● Movement cost for each terrain class.

/*3c*/int8_tauxiliary_terrain_cost_table[32];// ◐ A second per-terrain-class cost row.

/*5c*/int8_tcombat_initiative_percent_by_terrain_class[32];// ● Signed initiative modifier, in percent, for each selected terrain class.

/*7c*/int8_tcombat_damage_percent_by_terrain_class[32];// ● Signed weapon-damage modifier, in percent, for each selected terrain class.

/*9c*/uint16_tunit_construction_flags[64];// ● One flags word per unit class id, 64 slots.

/*11c*/uint8_ttail_script_ids_a[8];// ● Up to eight animation-script ids.

/*124*/uint8_tindexed_tail_bytes_a[5];// ◐ Five bytes, one per value of side_or_tail_pair_index.

/*129*/uint8_ttail_byte_129;// ◐ Passed to a lookup in a later step.

/*12a*/uint16_tselfMissionId;// ● 0–40The mission's own file id, stored a second time.

/*12c*/uint8_tindexed_tail_bytes_b[5];// ◐ Five bytes, one per value of side_or_tail_pair_index.

/*131*/uint8_ttail_script_ids_b[3];// ● Three optional animation-script ids.

/*134*/uint16_ttail_zero_padding[4];// ● Zero across all 24 local campaign missions.

/*13c*/uint8_tunknown_tail_payload[16];// ○ Zero in all 24 shipped missions.

}; /* 332 bytes */

/* side_selection_mask */

enum SideMasks : uint16_t {

SM_SIDE_0 = 0x0001,

SM_SIDE_1 = 0x0002,

SM_SIDE_2 = 0x0004,

SM_SIDE_3 = 0x0008,

SM_SIDE_4 = 0x0010,

SM_SIDE_5 = 0x0020, /* never set */

SM_SIDE_6 = 0x0040, /* never set */

/* bits 7–15: never set */

};

/* unit_construction_flags */

enum ConstructionFlags : uint16_t {

CF_FACTORY_LIST = 0x0001,

CF_SIDE_CONDITION = 0x0002,

/* bits 2–31: not listed */

};

/* ACTN Section */

struct ActnSection {

/*00*/chartag[4];// ● Literal ACTN.

/*04*/uint16_twidth;// ● Map width in hex cells.

/*06*/uint16_theight;// ● Map height in hex cells.

/*..*/int16_tterrain[];// ● 0x0008..0x0008+cell_count*2-1cell_count = width * height; row-major terrain tile ids.

/*..*/int16_toverlay[];// ● 0x0008+cell_count*2..0x0008+cell_count*4-1width * height overlay tile ids; values < 1 are empty.

/*..*/int16_tunits[];// ● 0x0008+cell_count*4..0x0008+cell_count*6-1width * height unit words, row-major; 0xffff (-1) marks an empty cell.

};

/* SHOP Section */

struct ShopSection {

/*00*/chartag[4];// ● Literal SHOP.

/*04*/uint16_trecord_count;// ● Number of 80-byte records following the header.

/*..*/ShopRecordfacility_records[];// ◐ 0x0006..0x0006+record_count*80-140 signed words per record.

};

/* ShopRecord */

struct ShopRecord {

/*00*/int16_trecord_type_flags;// ● 1 · 2Only 1 and 2 occur in the 1,081 records.

/*02*/uint16_tpacked_position;// ● 65–3931Cell position as x + y * factor.

/*04*/int16_tshopFunction;// ◐ Shop functionsObserved values are 0, 1, 2, 4, 8, 16, 32.

/*06*/int16_tfacility_creation_arg;// ◐ always 0Zero in all 1,081 nonempty campaign SHOP records.

/*08*/int16_tnameId;// ● 0–50Text id in ENG/MISS###.TXT.

/*0a*/int16_tactive_packed_position_copy;// ◐ 0–3931A second copy of the position: it equals packed_position in all 465 base-game records whose last contents word is -1, and is zero in all 616 whose last word is 0.

/*0c*/int16_tinitial_energy;// ◐ 0–90The facility's starting energy limit, read when the construction list is built.

/*0e*/int16_tinitial_material;// ◐ 0–70The facility's starting material limit, read when the construction list is built.

/*10*/int8_tfacility_energy_increment;// ● Signed energy income of this facility, added to its owning side's total when the incoming-owner update includes facility rates.

/*11*/int8_tfacility_material_increment;// ● Signed material income of this facility, added to its current material by the incoming-owner update when that update includes facility rates.

/*12*/int16_tcontents_slots[16];// ● -1–53Sixteen positions for starting unit class ids.

/*32*/uint16_tfacility_or_carrier_category;// ◐ Facility categoriesOn 440 of 441 building records the high byte is one facility-category bit, the same vocabulary as the unit class shop_mask; a unit may enter only when its mask has the matching bit.

/*34*/int16_tconstruction_unit_ids[4];// ● 0–52Up to four extra unit class ids appended to this facility's generic production list.

/*3c*/int16_tcapacity_state;// ◐ always 0Zero in all 1,081 nonempty campaign records.

/*3e*/int16_tunidentified_facility_word_3e;// ◐ 0–940An unidentified word that is not the owner.

/*40*/int16_towner_side_mask;// ◐ Side masksThe owning side as a single bit.

/*42*/int16_tzero_extension_words[3];// ○ always 0All three words are zero in every shipped record, and nothing is known to read them.

/*48*/int16_ttype2_extension_word_0;// ◐ 0–18Observed values: 0, 1, 2, 4, 8, 9, 12, 17, 18.

/*4a*/int16_ttype2_extension_word_1;// ◐ 0 · 5 · 6 · 7 · 10 ·…Observed values: 0, 5, 6, 7, 10, 20; 10 occurs in 596 records.

/*4c*/int16_ttype2_extension_word_2;// ◐ 0–2331Observed values: 0, 105, 137, 342, 793, 1556, 1808, 2327, 2331.

/*4e*/int16_ttype2_extension_word_3;// ◐ 0 · 4 · 7 · 794 · 13…Observed values: 0, 4, 7, 794, 1350.

}; /* 80 bytes */

/* shopFunction */

enum ShopFunctions : uint16_t {

SF_HQ = 0x0001,

SF_AIRPORT_OR_HARBOUR = 0x0002,

SF_DEPOT = 0x0004,

SF_ACADEMY = 0x0008,

SF_CITY_OR_VILLAGE = 0x0010,

SF_LOADED_TRANSPORT = 0x0020,

/* bits 6–15: never set */

};

/* facility_or_carrier_category */

enum FacilityCategories : uint16_t {

/* ○ 0x0001 bit 0: set in 1 records, meaning unknown */

/* ○ 0x0002 bit 1: set in 1 records, meaning unknown */

/* ○ 0x0020 bit 5: set in 1 records, meaning unknown */

/* ○ 0x0040 bit 6: set in 9 records, meaning unknown */

/* ○ 0x0080 bit 7: set in 1 records, meaning unknown */

FC_HQ = 0x0100,

FC_AIRPORT = 0x0200,

FC_HARBOUR = 0x0400,

FC_FACTORY = 0x0800,

FC_DEPOT = 0x1000,

FC_CITY = 0x2000,

FC_ACADEMY = 0x4000,

FC_SPECIAL_FACILITY = 0x8000,

/* bits 2–4: never set */

};

/* owner_side_mask */

enum SideMasks : uint16_t {

SM_SIDE_0 = 0x0001,

SM_SIDE_1 = 0x0002,

SM_SIDE_2 = 0x0004,

SM_SIDE_3 = 0x0008,

SM_SIDE_4 = 0x0010,

SM_SIDE_5 = 0x0020,

SM_SIDE_6 = 0x0040,

/* ○ 0x0080 bit 7: set in 1 records, meaning unknown */

/* bits 8–15: never set */

};

/* MAP Section */

struct MapSection {

/*00*/chartag[4];// ● Literal MAP\0: MAP plus a NUL terminator.

/*..*/MapActionRecordaction_records[];// ◐ 0x0004..firstDfOffset-1action_record_count = (firstDfOffset - mapOffset - 4) / 40; the section ends where the first DFxx section begins.

};

/* MapActionRecord */

struct MapActionRecord {

/*00*/uint16_tcategory_or_scope;// ◐ 0 · 48 · 80Corpus values are 0, 0x30, and 0x50.

/*02*/uint16_tturn;// ● 0–30Copied by parser and insertion to entry +0x0c; second-pass scheduling requires signed entry turn <= signed manager turn +0x12.

/*04*/uint16_ttrigger_group_or_side;// ● 0–12Copied through insertion to entry +0x0a; second-pass scheduling requires signed entry event <= signed manager event +0x10.

/*06*/uint8_taction_selector;// ● Copied to entry +0x0e.

/*07*/uint8_taction_type;// ● The action kind; the game dispatches on this byte.

/*08*/uint16_tduration_or_count;// ● 0 · 100Copied to entry +0x06, the unsigned low sequence ceiling; entry +0x08 is its signed high word.

/*0a*/uint16_taction_param_a;// ● always 0Zero in all 364 shipped action records.

/*0c*/uint16_taction_param_b;// ◐ 0–98Family-specific operand: type 0x04 DF index, 0x05/06/07 side number, 0x0d returned request word; type 0x02 weather state; type 0x03 ASCR scene id; type 0x07 side whose alliance row changes; type 0x08 target side; type 0x09 requested facility-owner side; type 0x0a maximum mission turn count; type 0x0c target unit class id.

/*0e*/uint16_taction_param_c;// ◐ 0–27Family-specific operand: 0x05 signed energy delta, 0x06 native facility ordinal; 0x0900 native facility ordinal (not a universal SHOP-array index); 0x0c00 target unit side id.

/*10*/uint16_taction_param_d;// ◐ 0 · 1Usually zero; the only nonzero shipped value is 1, in MISS003.DAT MAP record 4 (0x0704).

/*12*/uint16_tcopied_zero_action_words[3];// ◐ always 0All three words are zero in the shipped records.

/*18*/uint16_tunread_map_record_tail[8];// ○ always 0All eight words are zero in the shipped records, and the game never reads this part of the record.

}; /* 40 bytes */

/* DFxx Layers */

struct DFxxLayers {

/*00*/chartag[4];// ● DF00, DF01 and so on.

/*..*/DfCellRecorddeferred_cells[];// ◐ 0x0004..df_size-1Sparse map edits.

};

/* DfCellRecord */

struct DfCellRecord {

/*00*/uint16_tpacked_position;// ● Padded native cell index; the writer uses P for byte base/overlay planes and P*2 for word occupancy.

/*02*/int16_tterrain;// ● Compare raw word with source-ID word of each loaded 46-byte PART row; first match writes compact ordinal to base byte plane.

/*04*/int16_toverlay;// ● Same source-ID lookup; write matching compact ordinal, or ff when no row matches.

/*06*/int16_tunit;// ● ffff requests no creation.

}; /* 8 bytes */

/* The whole file: the header, then the sections in this order. Each section opens with its own

* tag, and the header's offsets say where it starts. */

struct MissionFile {

struct FileHeader header; // 278 bytes; missOffset, mapOffset, shopOffset and actnOffset locate the sections

struct MissSection miss; // 332 bytes, at missOffset

struct ActnSection actn; // at actnOffset; width * height cells in each of three planes

struct ShopSection shop; // at shopOffset; record_count records of 80 bytes

struct MapSection map; // at mapOffset; records of 40 bytes up to the first DFxx section

struct DFxxLayers layers[dfLayerCount]; // at dfOffsetsPlus4[i] - 4, dfSizes[i] bytes each; 0 to 2 layers

};

/* The sections vary in length, so a reader keeps their offsets rather than a C array of

* fixed-size elements. The shipped files hold them in exactly this order. */