Ultima 4 File Structures (Amiga version)
========================================

There were two releases of Ultima IV for the Amiga, the original Origin
release and the Microprose re-release both, apparently, in 1988. The
game came on a single 880k AmigaDos formatted disk. The disk contained
the following files and directories

avatar		- the main executable
c		- a directory contain support binaries
s		- a directory containing a startup script which executes avatar 
ultmapp		- a directory containing The Ultima IV game data

Users were required to create a "play" disk which contained a copy of the
contents of the ultmapp directory and was used instead of the original disk
while playing the game.

Many files end with the extension "LWZ" and are compressed using the LZW
algorithm. Files ending in "BIN" are not compressed. Also, file names may
be in upper or lower case. For more information on LZW data compression, see:

http://marknelson.us/1989/10/01/lzw-data-compression/

The remainder of this document contains a description of the various files
in the ultmapp directory with particular regard to the correspondence between
these files and the files from the PC version of Ultima IV as described
in the FileFormats.txt document distributed with xu4, available at

http://xu4.sourceforge.net/

Where appropriate, information from FileFormats.txt has been reproduced below.


Images
------

The image files used in the Amiga version of Ultima IV use identical formats
to those used in the Atari ST version. Information about some of the file
formats used in the Atari ST version may be found at

http://www.geocities.com/nodling/ultima/text/ultima4/u4atarist.txt

Much of the information in that document has been reproduced below.


Introduction Images
-------------------

The files FAIR.LWZ, GYPS.LWZ, LOOK.LWZ, PRTL.LWZ, TREE.BIN and WAGN.BIN
contain images displayed during the introduction sequence.

The raw uncompressed data describes a 16 colour, 320 by 152 image with a
32 byte colour palette. Every 8 bytes represents 16 pixels, with the first
two bytes containing the least significant bits, the next two containing
the second least significant bits, the next two containing the second
most significant bits and the last two containing the most significant
bits.

Each of the 16 entries in the colour palette is a 16 bit integer where bits
0-3, 4, 8 and 12 are always 0, bits 5-7 are the red component, bits 9-11 are
the green component and bits 13-15 are the blue component. Each of the colour
components contains a decimal value between 0 and 7. The 24 bit RGB colour
can be calculated by multiplying each components value by 32.

offset	len	notes
0x0     2       The least significant bits of pixels 0-15
0x2     2       The second least significant bits of pixels 0-15
0x4     2       The second most significant bits of pixels 0-15
0x6     2       The most significant bits of pixels 0-15
0x8     2       The least significant bits of pixels 16-31
...
0x5F00  32      The colour palette


Tile Data
---------

The file U4SH.LWZ contains the bitmaps for each tile used in the game.
Each tile is a 16 colour, 16 by 16 image. A 32 byte colour palette appears at
the beginning of the file. Every 4 bytes represents 8 pixels with the first
byte containing the least significant bits, the second byte containing
the second least significant bits, the third byte containing the second
most significant bits and the last byte containing the most significant
bits.

The colour palette uses the same format as is used for the introduction images
described above, with the exception that bits 0-3 of some colour entries are
not zero. The meaning of bits 0-3 for these entries is not understood.

offset	len	notes
0x0     32      The colour palette
0x20    1       The least significant bits of pixels 0-7 of tile 0
0x21    1       The second least significant bits of pixels 0-7 of tile 0
0x22    1       The second most significant bits of pixels 0-7 of tile 0
0x23    1       The most significant bits of pixels 0-7 of tile 0
0x24    1       The least significant bits of pixels 8-15 of tile 0
...
0xa0    1       The least significant bits of pixels 0-7 of tile 1
...


Other Images
------------

The files ANIM.LWZ, BGND.LWZ, CRDS.LWZ, DNGP.LWZ and RUNI.LWZ contain other
images used throughout the game. The format of the colour palettes, in those
files that have them, is the same as for the introduction images described
above.

ANIM.LWZ contains a 16 colour, 320 by 200 image which uses the colour palette
from U4SH.LWZ. The image consists of two sets of eighteen animation frames for
the chained demon and dragon on the Ultima IV title screen. In between the
animation frames are the virtue card borders and abacus graphics used during
character creation. This latter part of the image uses the colour palette
from CRDS.LWZ.

offset	len	notes
0x0     2       The least significant bits of pixels 0-15
0x2     2       The second least significant bits of pixels 0-15
...

BGND.LWZ contains a 16 colour, 320 by 200 image which uses the colour palette
from U4SH.LWZ. The image contains much of the graphics for the Ultima IV title
screen and also includes the names of the various virtues used with the virtue
cards during character creation.

offset	len	notes
0x0     2       The least significant bits of pixels 0-15
0x2     2       The second least significant bits of pixels 0-15
...

CRDS.LWZ contains a 16 colour, 320 by 190 image consisting of the eight virtue
cards used during character creation. Each card is 80 by 95 and they are
arranged in two rows of four cards each. The file includes some extra data
the meaning of which is not yet known.

offset	len	notes
0x0     4       All zeros
0x4     32      The colour palette
0x24    92      Meaning unknown
0x80    2       The least significant bits of pixels 0-15
0x82    2       The second least significant bits of pixels 0-15
...
0x7740  1600    All zeros

DNGP.LWZ contains a 16 colour, 320 by 200 image containing the wall and door
graphics used in dungeons. The location of the colour palette for the dungeon
graphics is not known, but only colours 9-14 are used (the game retains the
other colours from the U4SH.LWZ palette). The correct values for colour
entries 9-14 are believed to be 0x0333, 0x0444, 0x0543, 0x0543, 0x0555, 0x0654
and 0x0765.

Also contained within the image are the graphics for the various moon phases
and the blue and white border which surrounds the main window during play.
This portion of the image uses the colour palette from U4SH.LWZ.

offset	len	notes
0x0     2       The least significant bits of pixels 0-15
0x2     2       The second least significant bits of pixels 0-15
...

RUNI.LWZ contains a 16 colour, 320 by 200 image using the colour palette from
U4SH.LWZ (only colour entries 0 and 4 are used). The image consists of the
five runes displayed as visions upon achieving partial avatarhood in a virtue
during play. Each rune is 80 by 60 and they are arranged in two rows, the
first containing four runes (I, N, F and T) and the second only one rune (Y).

offset	len	notes
0x0     2       The least significant bits of pixels 0-15
0x2     2       The second least significant bits of pixels 0-15
...


World Map
---------

The file U4MP.LWZ contains the map of Britannia. It is a 256 by 256 matrix
of one byte tile indices. Unlike the PC version, the Amiga version is not
broken up into chunks.

offset	len	notes
0x0     256     The first row of map data
0x100   256     The second row of map data
...
0xFF00  256     The last (256th) row of map data


Townes
------

Each towne is described in a dialog file called TLK?.LWZ and a map file
called MAP?.LWZ. The ? in the file name is a single character with the
following meaning

@       Lord British's castle, level 2.
A       Lord British's castle, level 1.
B       The Lycaeum
C       Empath Abbey
D       Serpent's Hold
E       Moonglow
F       Britain
G       Jhelom
H       Yew
I       Minoc
J       Trinsic
K       Skara Brae
L       Magincia
M       Paws
N       Buccaneer's Den
O       Vesper
P       Cove


Towne Dialog
------------

The files TLKA.LWZ, TLKL.LWZ, TLKN.LWZ, TLKO.LWZ, tlkb.lwz, tlkc.lwz,
tlkd.lwz, tlke.lwz, tlkf.lwz, tlkg.lwz, tlkh.lwz, tlki.lwz, tlkj.lwz,
tlkk.lwz, tlkm.lwz, and tlkp.lwz contain the dialog strings. They correspond
to the PC version's dialog files LCB.TLK, MAGINCIA.TLK, DEN.TLK, VESPER.TLK,
LYCAEUM.TLK, EMPATH.TLK, SERPENT.TLK, MOONGLOW.TLK, BRITAIN.TLK, JHELOM.TLK,
YEW.TLK, MINOC.TLK, TRINSIC.TLK, SKARA.TLK, PAWS.TLK and COVE.TLK
respectively. The format of the files is, however, a little different.

Note: In the dialog strings a 0x8D byte is used to signify end of line.

offset	len	notes
0x0     48      ???
0x30    4       NPC 1 keyword 1
0x34    4       NPC 1 keyword 2
0x38    1       NPC 1 question flag (0-no question, 3-job triggers, 4-health
                triggers, 5-keyword 1 triggers, 6-keyword 2 triggers)
0x39    1       NPC 1 question type (0-answer does not affect humility,
                1-answer does affect humility and correct answer is always no)
0x40    1       NPC 1 turns away probability
0x41    var     NPC 1 name (zero terminated)
var     var     NPC 1 pronoun (zero terminated)
var     var     NPC 1 description (zero terminated)
var     var     NPC 1 job (zero terminated)
var     var     NPC 1 health (zero terminated)
var     var     NPC 1 response 1 (zero terminated)
var     var     NPC 1 response 2 (zero terminated)
var     var     NPC 1 question (zero terminated)
var     var     NPC 1 yes answer (zero terminated)
var     var     NPC 1 no answer (zero terminated)
var     0 or 1  To ensure the record for the next NPC starts on an even
                byte boundary, there may be a second zero terminator here.
var     4       NPC 2 Keyword 1
...


Towne Maps
----------

The files MAP@.LWZ, MAPA.LWZ, MAPB.LWZ, MAPC.LWZ, MAPD.LWZ, MAPE.LWZ,
MAPF.LWZ, MAPG.LWZ, MAPH.LWZ, MAPI.LWZ, MAPJ.LWZ, MAPK.LWZ, MAPL.LWZ,
MAPM.LWZ, MAPN.LWZ, MAPO.LWZ and MAPP.LWZ contain the town maps and
other information. They correspond to the PC version's towne files
LCB_2.ULT, LCB_1.ULT, LYCAEUM.ULT, EMPATH.ULT, SERPENT.ULT, MOONGLOW.ULT,
BRITAIN.ULT, JHELOM.ULT, YEW.ULT, MINOC.ULT, TRINSIC.ULT, SKARA.ULT,
MAGINCIA.ULT, PAWS.ULT, DEN.ULT, VESPER.ULT and COVE.ULT respectively.

Indeed the Amiga files are identical to the corresponding PC version's files
with the exception of MAPJ.LWZ, which differs in one byte from the PC
TRINSIC.ULT file. See the "Bugs and Differences to the PC Version" section
below.

offset	len	notes
0x0     1024    32x32 town map matrix
0x400   32      tile for NPCs 0-31 (unsure of the exact meaning of this tile;
                could be last tile in animation sequence)
0x420   32      start_x for NPCs 0-31
0x440   32      start_y for NPCs 0-31
0x460   32      tile for NPCs 0-31 (first tile in animation sequence?)
0x480   32      repetition of 0x420-0x43F
0x4A0   32      repetition of 0x440-0x45F
0x4C0   32      movement_behaviour for NPCs 0-31 (0x0-fixed, 0x1-wander,
                0x80-follow, 0xFF-attack)
0x4E0   32      dialog index (tlk file) for NPCs 0-31 (0x0-silent/merchant,
                0x01-0x10 index of TLK entry)


Dungeons
--------

Each dungeon is described in a map file called DNG?.BIN and a room file called
DRM?.LWZ. The ? in the file name is a single character with the following
meaning

0       Deceit
1       Despise
2       Destard
3       Wrong
4       Covetous
5       Shame
6       Hythloth
7       The Abyss


Dungeon Maps
------------

The files DNG0.BIN, DNG1.BIN, DNG2.BIN, DNG3.BIN, DNG4.BIN, DNG5.BIN,
dng6.bin and DNG7.BIN contain the dungeon maps. They correspond to the
first 512 bytes of the PC version's dungeon files DECEIT.DNG, DESPISE.DNG,
DESTARD.DNG, WRONG.DNG, COVETOUS.DNG, SHAME.DNG, HYTHLOTH.DNG and ABYSS.DNG
respectively.

offset	len	notes
0x0     64      level 1 8x8 map matrix
0x40    64      level 2 8x8 map matrix
0x80    64      level 3 8x8 map matrix
0xC0    64      level 4 8x8 map matrix
0x100   64      level 5 8x8 map matrix
0x140   64      level 6 8x8 map matrix
0x180   64      level 7 8x8 map matrix
0x1C0   64      level 8 8x8 map matrix

Each byte of the map matrix has the following meaning
0x0             Nothing/Corridor
0x10            Ladder up
0x20            Ladder down
0x30            Ladder up & down
0x40            Treasure chest
0x50            Ceiling hole ?
0x60            Floor hole ?
0x70            Magic Orb
0x80            Winds
0x81            Falling Rock Trap
0x8E            Pit Trap
0x90            Plain Fountain
0x91            Healing Fountain
0x92            Acid Fountain
0x93            Cure Fountain
0x94            Poison Fountain
0xA0            Poison Field
0xA1            Energy Field
0xA2            Fire Field
0xA3            Sleep Field
0xB0            Altar
0xC0            Door
0xD0-0xDF       Dungeon Room. Index to room file described below.
0xE0            Secret Door
0xF0            Wall


Dungeon Rooms
-------------

The files DRM0.BIN, DRM1.BIN, DRM2.BIN, DRM3.BIN, DRM4.BIN, DRM5.BIN,
drm6.bin and DRM7.BIN contain the dungeon room data. They correspond to the
last 4096 bytes of the PC version's dungeon files DECEIT.DNG, DESPISE.DNG,
DESTARD.DNG, WRONG.DNG, COVETOUS.DNG, SHAME.DNG, HYTHLOTH.DNG and ABYSS.DNG
respectively.

offset	len	notes
0x0     256     room 0 data
0x100   256     room 1 data
...

Note: The Abyss has 64 rooms, not the usual 16.

Each room has the following format:

offset	len	notes
0x0     16      floor triggers (4 bytes each X 4 triggers possible)
0x10    16      tile for monsters 0-15 (0 means no monster and 0's come FIRST)
0x20    16      start_x for monsters 0-15
0x30    16      start_y for monsters 0-15
0x40    8       start_x for party member 0-7 (north entry)
0x48    8       start_y for party member 0-7 (north entry)
0x50    8       start_x for party member 0-7 (east entry)
0x58    8       start_y for party member 0-7 (east entry)
0x60    8       start_x for party member 0-7 (south entry)
0x68    8       start_y for party member 0-7 (south entry)
0x70    8       start_x for party member 0-7 (west entry)
0x78    8       start_y for party member 0-7 (west entry)
0x80    121     11x11 map matrix for room
0xF9    7       padding

Trigger format:

offset	len	notes
0x0     1       tile to be placed (0 means no trigger and 0's come LAST)
0x1     1       2 nibbles indicating the (x,y) coords of trigger
0x2     1       2 nibbles indicating the (x,y) coords of 1st tile to change
0x3     1       2 nibbles indicating the (x,y) coords of 2nd tile to change


Save Game Files
---------------

The files DLST.BIN, DNGT.BIN, LIST.BIN, PRTY.BIN and ROST.BIN are used to
store the state of the game when the player elects to quit and save. The
format of the files is, I believe, identical to the save game file formats
used in the Apple version described in the AppleFileFormats.txt file
distributed with xu4, available at

http://xu4.sourceforge.net

Much of the information in that file has been reproduced below.

DLST.BIN contains the backup of the so-called "monster table" and corresponds
to the OUTMONST.SAV file in the PC version and the TLST file in the Apple
version. It is used to store the world monster table when the player enters a
dungeon so that it can be restored when they leave. The format of the file
is identical to that of LIST.BIN described below.

DNGT.BIN is modified when the player elects to quit and save in a dungeon. It
contains the dungeon map of the dungeon the player is exploring when they
save the game. It corresponds to the DNGMAP.SAV file in the PC version and
uses the same format as the Dungeon Map files described above. However, the
lower nibble of each byte may also indicate the presence of a monster with
each nibble having the following meaning:

0	nothing
1	rat
2	bat
3	spider
4	ghost
5	slime
6	troll
7	gremlin
8	mimic
9	reaper
A	insects
B	gazer
C	phantom
D	orc
E	skeleton
F	rogue

LIST.BIN contains the so-called "monster table". It corresponds to the
MONSTERS.SAV file in the PC version and the LIST file in the Apple version.
Indeed the format is, apparently, identical in all three files and is very
similar to the last 256 bytes of the Towne Map files described above. It
describes the location of monsters and items (such as chests).

offset	len	notes
0x00	32	current tile for objects 0-31
0x20	32	current x coordinate for objects 0-31
0x40	32	current y coordinate for objects 0-31
0x60	32	previous tile for objects 0-31
0x80	32	previous x coordinate for objects 0-31
0xA0	32	previous y coordinate for objects 0-31
0xC0	32	not used
0xE0	32	not used

PRTY.BIN contains information about the party. It corresponds to parts of
the PARTY.SAV file in the PC version and the PRTY file in the Apple version.

offset	len	notes
0x0	1	x coordinate
0x1	1	y coordinate
0x2	4	redundant x, y coordinates
0x6	2	weird rotating values... possibly wind direction?
0x8	1	x coordinate of last settlement/dungeon visited
0x9	1	y coordinate of last settlement/dungeon visited
0xA	1	party location (0x0=surface, 0x11-0x18=Deceit..Abyss)
0xB	1	map type (0x1=world; 0x2=town; 0x3=dungeon; ???)
0xC	1	dungeon level starting with 0
0xD	1	0x0 on ground, 0xff in air
0xE	1	transport (0x10-0x13=ship facing west, north, east or south;
                0x14-0x15=horse facing west or east; 0x1f=on foot)
0xF	1	party size
0x10	1	direction facing in dungeon (0x0-0x3=north, east, south, west)
0x11	1	torch life
0x12	1	Trammel phase
0x13	1	Felucca phase
0x14	1	0xff when giddyup'd, otherwise 0x0
0x15	1	introduced to Lord British
0x16	1	last camp (the number of moves divided by 100)
0x17	1	last humility question / give to beggar
0x18	1	altar room type (0x0-0x3=truth, love or courage;
                0xff if not an altar room)
0x19	1	last meditate
0x1A	1	last nightshade / mandrake
0x1B	1	hull strength (in binary coded decimal)
0x1C	4	number of moves (in binary coded decimal)

ROST.BIN contains the party roster and other save game data. It corresponds
to parts of the PARTY.SAV file in the PC version and the ROST file in the
Apple version. The NRST.BIN file contains the starting values (i.e. when
initiating a new game) for the first 384 bytes of the ROST.BIN file.

offset	len	notes
0x0     32      character 1
0x20    32      character 2
0x40    32      character 3
0x60    32      character 4
0x80    32      character 5
0xA0    32      character 6
0xC0    32      character 7
0xe0    32      character 8
0x100	8       karma for honesty - humility (1-99, or 0) (is 1 the minimum?)
0x108	1       torches (in binary coded decimal)
0x109	1       gems (in binary coded decimal)
0x10A	1       keys (in binary coded decimal)
0x10B	1       sextants (in binary coded decimal)
0x10C	1       stones (bits, 0x80 blue - 0x01 black)
0x10D	1       runes (bits, 0x80 honesty - 0x01 humility)
0x10E	1       bell book candle owned/used (0x4 0x2 0x1/0x40 0x20 0x10)
0x10F	1       three part key TLC (0x4, 0x2, 0x1)
0x110	3       food (in hundredths, binary coded decimal)
0x113	2       gold (in binary coded decimal)
0x115	1       horn
0x116	1       wheel
0x117	1       skull (1 if owned, 0xff if destoyed)
0x118	8       armor quantities (skin through robe, binary coded decimal)
0x120	16      weapon quantities (hands - mystic swords, binary coded decimal)
0x130	8       unknown (always zero)
0x138	8       reagents quantities (ash through mandrake root)
0x140	26      mixture quantities (awaken through z-down)
0x15A	166	unknown (all zeros)

The format of the character records is described below. Most values are
stored in binary coded decimal. Most strings are stored with the most
significant bit of each character set. To convert strings to ASCII,
logically AND each character with 0x7F.

offset	len	notes
0x0     16      name, zero-terminated, most significant bit may be set.
0x10    1       sex (0x5C male, 0x7B female)
0x11    1       class (0-7, mage-shepherd)
0x12    1       health ("G", "D", "P", or "S" - most significant bit set)
0x13    1       str (in binary coded decimal)
0x14    1       dex (in binary coded decimal)
0x15    1       int (in binary coded decimal)
0x16    1       MP (in binary coded decimal)
0x17    1       virtue bitmask (0x80 - 0x01, honesty - humility)
		Determines what weapons you can use, maybe other
		things, too. Can be set independently of class.
0x18    2       hit points (in binary coded decimal)
0x1A    2       hit max (in binary coded decimal)
0x1C    2       experience (in binary coded decimal)
0x1E    1       weapon (0x00-0x0F, hands-mysticsword)
0x1F    1       armor (0x00-0x07, skin-mysticrobe)


Bugs and Differences to the PC Version
--------------------------------------

Most of the differences between the dialog in the Amiga version and in the
PC version are trivial (e.g. capitalisation and punctuation). Some
conversations, however, are significantly different. There are also a
number of bugs in the dialog files on both platforms, though in the
ultima4-1.01.zip file distributed with xu4, many of these bugs have been
fixed.


CASTLE BRITANNIA

In the Amiga talk file (TLKA.LWZ) the NPC Joshua has different keywords to
the PC version. In the PC talk file (LCB.TLK) Joshua's keywords are HELP and
RIDD with RIDD being the question trigger. His responses are:

NAME: Joshua
JOB: I can help.
HELP: The riddle!
RIDD: If the eight philosophies of Avatarhood combine into and are made from
truth, love & courage...
QUESTION: More?
YES RESPONSE: What one thing creates and is created by all truths, all love
& all courage?

In the Amiga version, however, the keywords are INFI and HELP with HELP being
the question trigger. The responses are

NAME: Joshua
JOB: I can help.
HELP: If the eight philosophies of Avatarhood combine into and are made from
truth, love & courage...
QUESTION: More?
YES RESPONSE: What one thing creates and is created by all truths, all love
& all courage?
INFI: Thou art wise!

In both the PC version and in the Amiga version, the question trigger for the
NPC called Water is 0 (no question) when in should be 6 (keyword2). This
prevents the player from receiving the Water's advice regarding the
three part key. The correct responses are

NAME: Water
JOB: I hold a secret.
SECR: To what?
ALTA: There are three alter rooms which connect the bottom levels of all
eight dungeons!
QUESTION: More?
YES RESPONSE: If the correct colors of stones are used in the altars, a key of
three parts can be gained!

This bug is fixed in the ultima4-1.01.zip file distributed with xu4.


LYCAEUM

In the Amiga talk file (tlkb.lwz) the first keyword for the NPC Estro is RESE
(short for research). The PC talk file (LYCAEUM.TLK) erroneously uses REAS
making it difficult for the player of the PC version to discover Estro's
second keyword "JUST" (short for justice and also the question trigger). The
responses on the Amiga version are

NAME: Estro
JOB: Research
RESE: I am looking for the book of justice!
JUST: It must be here somewhere!
QUESTION: Hast thou never committed *any* crime!?
YES RESPONSE: I believe thou art boasting a lie!
NO RESPONSE: Then speak to the judge in Yew!


SERPENTS HOLD

In the Amiga talk file (tlkd.lwz) the NPC Michelle erroneously directs the
player north to see Sentri and north to see the healer. In the PC talk file
(SERPENT.TLK) the player is directed west and east respectively. The Amiga
conversation responses are

NAME: Michelle
JOB: I welcome thee unto Serpent Castle!
HEAL: Very well.
QUESTION: Art thou well?
YES RESPONSE: Very good, perhaps thou seeks Sentri.
NO RESPONSE: Then thou should visit our healer!
SENT: He is the lord here, take the north passage.
HEAL: Take the north passage.

Also, there is a bug in both the PC and Amiga towne maps for Serpents Hold
(MAPD.LWZ and SERPENT.ULT respectively). NPCs 28 and 29 (the guards at the
entrance) erroneously use dialog entry 1, which is the entry for Sentri
(the lord of Serpents Hold), when they should use entry 2 which is the entry
for a guard. This bug is fixed in the ultima4-1.01.zip file distributed
with xu4.


MOONGLOW

While the Amiga talk file (tlke.lwz) does not differ significantly from the
PC talk file (MOONGLOW.TLK) the NPC Calabrini has HEAL as his second keyword.
This conflicts with the standard health keyword. The PC version prioritised
the standard keywords, but the Amiga version prioritised the custom keywords.
The conversation responses on the Amiga version are

NAME: Calabrini
JOB: I bear greetings from the fair city of Moonglow.
QUESTION: Dost thou seek an inn or healing?
YES RESPONSE: Which?
NO RESPONSE: Perhaps, the shrine which lies on an isle to the north!
INN: We have an excellent inn.
HEAL: Our healer is one of the best!

On the PC version, however, the response to the HEAL keyword would be:

HEAL: Fine.


BRITAIN

In the Amiga talk file (tlkf.lwz) the NPC Thevel has different keywords to
the PC version. In the PC talk file (BRITAIN.TLK) the keywords are ORBS and
MAGI with ORBS being the question trigger. Thevel's responses are

NAME: Thevel
JOB: I search for the mystery of the magic orbs.
MAGI: Magic orbs.
ORBS: A one-handed beggar knows their secrets!
QUESTION: Hast thou seen him?
YES RESPONSE: Only he knows the orb's gift!
NO RESPONSE: Find him in Serpent castle for he knows of orbs!

In the Amiga version, however, the keywords are ORBS and BEGG with BEGG
being the question trigger. The conversation responses are

NAME: Thevel
JOB: I search for the mystery of the magic orbs.
ORBS: A one-handed beggar knows their secrets!
BEGG: Yes, a beggar.
QUESTION: Hast thou seen him?
YES RESPONSE: Only he knows the orb's gift!
NO RESPONSE: Find him in Serpent Castle for he knows of orbs!


YEW

The talk file of the PC version (YEW.TLK) erroneously has the first keyword
for the NPC named "a poor beggar." as "SINE" while the Amiga talk file
(tlkh.lwz) correctly spells it "SINN". The conversation responses on the
Amiga version are

NAME: A poor beggar.
JOB: I have sinned.
SINN: I have gotten chests in the townes and killed non-evil creatures.
QUESTION: Should thou be in with the felon?
YES RESPONSE: Thou art in the wrong cell.
NO RESPONSE: Good.
FELO: He is a mean nasty ugly villain!

This bug is fixed in the ultima4-1.01.zip file distributed with xu4.


MINOC

In both the PC talk file (MINOC.TLK) and the Amiga talk file (tlki.lwz) the
question trigger for Alkerion is 0x0A (invalid?) when it should be 6
(keyword2). The correct conversation responses are

NAME: Alkerion
JOB: I am a peasant, I hear many things.
HEAR: What does thou wish to know?
STON: The stone of sacrifice is orange in colour and used in the altar rooms
of love and courage!
QUESTION: Seeketh thou?
YES RESPONSE: Good luck.
NO RESPONSE: Oh.

This bug is fixed in the ultima4-1.01.zip file distributed with xu4.


TRINSIC

The Amiga towne map file (MAPJ.LWZ) differs from the PC version TRINSIC.ULT
by one byte in the movement behaviour section. NPC 30 has movement behaviour
0xFF, while in the PC version NPC 30 has movement behaviour 0x01. NPC 30 has a
dialog index of 0 which usually indicates a silent character or merchant.


SKARA BRAE

In both the PC talk file (SKARA.TLK) and the Amiga talk file (tlkk.lwz) the
question trigger for Shamino is 0 (no question) when it should be 6
(keyword2). The correct conversation responses are

NAME: Shamino
JOB: I seek the inner light.
LIGH: I seek the 'one great truth'!
TRUT: That which lies within the Codex!
QUESTION: Dost thou seek this 'truth'?
YES RESPONSE: Some things take forever but brick by brick mountains can be
built!
NO RESPONSE: Alas.

This bug is fixed in the ultima4-1.01.zip file distributed with xu4.


COVE

In both the PC talk file (COVE.TLK) and the Amiga talk file (tlkp.lwz) the
question trigger for Charm is 0 (no question) when it should be 6 (keyword2).
This prevents the player from receiving Charm's advice regarding the axiom.
The correct conversation responses are

NAME: Charm
JOB: I ponder the key to the axiom.
KEY: To the axiom.
AXIO: The 1 pure axiom encompasses all things.
QUESTION: Know ye what they are?
YES RESPONSE: Good.
NO RESPONSE: The truths of the universe, the love of the heart, and the
courage of the soul!

This bug is fixed in the ultima4-1.01.zip file distributed with xu4.


THE DUNGEON WRONG

The Amiga dungeon map file (DNG3.BIN) file differs from the PC version
(WRONG.DNG) on level 4, having a 0x10 (ladder up) where the PC version has
a 0x40 (treasure chest) and a 0x40 (treasure chest) where the PC version
has a 0x10 (ladder up). The maps are shown below, with the PC version on
the left and Amiga on the right.

f0 f0 f0 f0 f0 f0 f0 40		f0 f0 f0 f0 f0 f0 f0 40
f0 10 00 00 00 10 f0 40		f0 10 00 00 00 10 f0 40
f0 f0 f0 c0 f0 f0 f0 40		f0 f0 f0 c0 f0 f0 f0 40
f0 00 00 00 00 00 f0 40		f0 00 00 00 00 00 f0 10 <--
f0 00 f0 d2 f0 00 f0 10		f0 00 f0 d2 f0 00 f0 40 <--
f0 00 d5 20 d3 00 f0 40		f0 00 d5 20 d3 00 f0 40
f0 00 f0 d4 f0 00 f0 40		f0 00 f0 d4 f0 00 f0 40
f0 00 00 00 00 00 f0 40		f0 00 00 00 00 00 f0 40

This means that, on the Amiga version, the ladder up on level 4 does not
align with the corresponding ladder down on level 3.


THE DUNGEON COVETOUS

The Amiga dungeon map file (DNG4.BIN) differs from the PC version
(COVETOUS.DNG) on level 7, having a 0x00 (nothing or corridor) where the PC
version has a 0x10 (ladder up). The maps are shown below, with the PC version
on the left and Amiga on the right.

f0 f0 f0 f0 f0 00 f0 f0		f0 f0 f0 f0 f0 00 f0 f0
f0 20 d8 d9 e0 00 e0 b0		f0 20 d8 d9 e0 00 e0 b0
f0 f0 f0 f0 f0 00 f0 f0		f0 f0 f0 f0 f0 00 f0 f0
00 00 00 10 f0 20 00 00		00 00 00 00 f0 20 00 00 <--
f0 f0 f0 da f0 f0 f0 f0		f0 f0 f0 da f0 f0 f0 f0
00 10 f0 db 00 00 00 00		00 10 f0 db 00 00 00 00
f0 f0 f0 dc f0 f0 f0 f0		f0 f0 f0 dc f0 f0 f0 f0
00 00 00 00 f0 20 00 00		00 00 00 00 f0 20 00 00

This means that, on the Amiga version, there is no ladder up on level 7
corresponding to one of the ladder downs on level 6.

The Amiga dungeon room file (DRM4.LWZ) differs from the PC version
(COVETOUS.DNG) in the room 11 (i.e. room 0xB) map on level 7. The Amiga
version has a 0x7F (wall) at co-ordinates 0x7, 0x5 where the PC version has
0x16 (floor) and a 0x16 (floor) at co-ordinates 0xA, 0x5 where the PC
version has a 0x7F (wall). The maps are shown below, with the PC
version on the left and Amiga on the right.

7f 7f 7f 7f 7f 16 7f 7f 7f 7f 7f	7f 7f 7f 7f 7f 16 7f 7f 7f 7f 7f
7f 16 16 16 16 16 16 16 16 16 7f	7f 16 16 16 16 16 16 16 16 16 7f
7f 7f 7f 7f 16 16 16 7f 7f 7f 7f	7f 7f 7f 7f 16 16 16 7f 7f 7f 7f
7f 16 16 16 16 16 16 16 16 16 7f	7f 16 16 16 16 16 16 16 16 16 7f
7f 7f 7f 7f 16 16 16 7f 7f 7f 7f	7f 7f 7f 7f 16 16 16 7f 7f 7f 7f
7f 16 16 16 16 16 16 16 16 16 7f	7f 16 16 16 16 16 16 7f 16 16 16 <--
7f 7f 7f 7f 16 16 16 7f 7f 7f 7f	7f 7f 7f 7f 16 16 16 7f 7f 7f 7f
7f 16 16 16 16 16 16 16 16 16 7f	7f 16 16 16 16 16 16 16 16 16 7f
7f 7f 7f 7f 16 16 16 7f 7f 7f 7f	7f 7f 7f 7f 16 16 16 7f 7f 7f 7f
7f 16 16 16 16 16 16 16 16 16 7f	7f 16 16 16 16 16 16 16 16 16 7f
7f 7f 7f 7f 7f 16 7f 7f 7f 7f 7f	7f 7f 7f 7f 7f 16 7f 7f 7f 7f 7f

This means that, in the Amiga version, entering room 11 from the east
will trap the party in a dead-end corridor with the only option being to
exit back to the east. There is a monster at location 0x7, 0x5 (where the
Amiga version has a wall) but when the monster moves from this location
the wall is restored.

In addition, the trigger in this room is supposed to replace a wall tile at
co-ordinates 0xA, 0x5 with a floor tile when the player moves to co-ordinates
0x1, 0x5, thus opening an exit to the east. Since the Amiga version already
has a floor tile at 0xA, 0x5 the trigger has no effect and the player is not
able to exit east if they enter from the north or south.


Files
-----

The following is a list of all files in the ULTMAPP directory with a short
description of their contents and, where the file format is substantially the
same, the name of the corresponding file in the PC version.

* = there are small differences between the Amiga file and the PC file.

ANIM.LWZ        - Animation frames for the title screen and border graphics
                - for the virtue cards used during character creation.
BGND.LWZ        - Title screen background.
CMPD.BIN        - Dungeon hole up map and hole up battleground map. CAMP.DNG
CMPO.BIN        - Battleground map. CAMP.CON
CON0.BIN        - Battleground map. DNG0.CON
CON1.BIN        - Battleground map. DNG1.CON
CON2.BIN        - Battleground map. DNG2.CON
CON3.BIN        - Battleground map. DNG3.CON
CON4.BIN        - Battleground map. DNG4.CON
CON5.BIN        - Battleground map. DNG5.CON
CON6.BIN        - Battleground map. DNG6.CON
CONA.BIN        - Battleground map. INN.CON
CONB.BIN        - Battleground map. BRUSH.CON
CONC.BIN        - Battleground map. BRICK.CON
COND.BIN        - Battleground map. DUNGEON.CON
CONE.BIN        - Battleground map. SHIPSHOR.CON
CONF.BIN        - Battleground map. FOREST.CON
CONG.BIN        - Battleground map. GRASS.CON
CONH.BIN        - Battleground map. HILL.CON
CONI.BIN        - Battleground map. SHORSHIP.CON
CONO.BIN        - Battleground map. SHORE.CON
CONP.BIN        - Battleground map. SHIPSEA.CON
CONR.BIN        - Battleground map. BRIDGE.CON
CONS.BIN        - Battleground map. MARSH.CON
CONT.BIN        - Battleground map. SHIPSHIP.CON
CRDS.LWZ        - Virtue card graphics.
DISK.BIN        - Contains the string "BOOT", or "PLAY" for the play disk
DLST.BIN        - Save game data. OUTMONST.SAV
DNG0.BIN        - Dungeon map. First 512 bytes of DECEIT.DNG
DNG1.BIN        - Dungeon map. First 512 bytes of DESPISE.DNG
DNG2.BIN        - Dungeon map. First 512 bytes of DESTARD.DNG
DNG3.BIN        - Dungeon map. First 512 bytes of WRONG.DNG *
DNG4.BIN        - Dungeon map. First 512 bytes of COVETOUS.DNG *
DNG5.BIN        - Dungeon map. First 512 bytes of SHAME.DNG
DNG7.BIN        - Dungeon map. First 512 bytes of ABYSS.DNG
DNGP.LWZ        - Dungeon wall and door graphics plus moon phase and
                - interface border graphics.
DNGT.BIN        - Save game. DNGMAP.SAV
DRM0.LWZ        - Dungeon room data. Last 4096 bytes of DECEIT.DNG
DRM1.LWZ        - Dungeon room data. Last 4096 bytes of DESPISE.DNG
DRM2.LWZ        - Dungeon room data. Last 4096 bytes of DESTARD.DNG
DRM3.LWZ        - Dungeon room data. Last 4096 bytes of WRONG.DNG
DRM4.LWZ        - Dungeon room data. Last 4096 bytes of COVETOUS.DNG *
DRM5.LWZ        - Dungeon room data. Last 4096 bytes of SHAME.DNG
DRM7.LWZ        - Dungeon room data. Last 4096 bytes of ABYSS.DNG
FAIR.LWZ        - Intro image. The fair.
GYPS.LWZ        - Intro image. The gypsy.
LIST.BIN        - Save game data. MONSTERS.SAV
LOOK.LWZ        - Intro image. The fair from afar.
LORD.LWZ        - Lord British's dialog text plus other data.
MAP@.LWZ        - Towne map. LCB_2.ULT
MAPA.LWZ        - Towne map. LCB_1.ULT
MAPB.LWZ        - Towne map. LYCAEUM.ULT
MAPC.LWZ        - Towne map. EMPATH.ULT
MAPD.LWZ        - Towne map. SERPENT.ULT
MAPE.LWZ        - Towne map. MOONGLOW.ULT
MAPF.LWZ        - Towne map. BRITAIN.ULT
MAPG.LWZ        - Towne map. JHELOM.ULT
MAPH.LWZ        - Towne map. YEW.ULT
MAPI.LWZ        - Towne map. MINOC.ULT
MAPJ.LWZ        - Towne map. TRINSIC.ULT *
MAPK.LWZ        - Towne map. SKARA.ULT
MAPL.LWZ        - Towne map. MAGINCIA.ULT
MAPM.LWZ        - Towne map. PAWS.ULT
MAPN.LWZ        - Towne map. DEN.ULT
MAPO.LWZ        - Towne map. VESPER.ULT
MAPP.LWZ        - Towne map. COVE.ULT
NRST.BIN        - New Roster. Starting values for the first 384 bytes of the
                - ROST.BIN file used when initiating a new game.
PRTL.LWZ        - Intro image. The circle of stones.
RUNI.LWZ        - Rune visions image displayed when becoming a partial avatar.
SHRI.BIN        - Similar to SHRINE.CON but strangely different
                - First 121 bytes are an 11 by 11 map of the Shrine.
TLKA.LWZ        - Towne Dialog. Similar to LCB.TLK
TLKL.LWZ        - Towne Dialog. Similar to MAGINCIA.TLK
TLKN.LWZ        - Towne Dialog. Similar to DEN.TLK
TLKO.LWZ        - Towne Dialog. Similar to VESPER.TLK
TREE.BIN        - Intro image. The tree.
U4MP.LWZ        - The world map.
U4SH.LWZ        - The map tiles. Similar to SHAPES.EGA.
WAGN.BIN        - Intro image. The wagon.
boot.lwz        - Intro dialog including virtue questions plus other data.
codx.bin        - Unknown. Possibly related to the codex?
dng6.bin        - Hythloth. First 512 bytes of HYTHLOTH.DNG
drm6.lwz        - Hythloth. Last 4096 bytes of HYTHLOTH.DNG
hole.lwz        - Unknown. Possibly related to holing up and camping?
musb.bin        - Unknown. Possibly in game music.
musc.bin        - Unknown. Possibly in game music.
musd.bin        - Unknown. Possibly in game music.
muso.bin        - Unknown. Possibly in game music.
must.bin        - Unknown. Possibly in game music.
prty.bin        - Save game data.
rost.bin        - Save game data. Basically contains what you see in Ztats.
save.bin        - Lord British's dialog strings when he saves the player
                - after the whole party has died, and other unknown data.
snds.bin        - Unknown. Possibly sound effects?
tlkb.lwz        - Towne Dialog. Similar to LYCAEUM.TLK.
tlkc.lwz        - Towne Dialog. Similar to EMPATH.TLK.
tlkd.lwz        - Towne Dialog. Similar to SERPENT.TLK.
tlke.lwz        - Towne Dialog. Similar to MOONGLOW.TLK.
tlkf.lwz        - Towne Dialog. Similar to BRITAIN.TLK.
tlkg.lwz        - Towne Dialog. Similar to JHELOM.TLK.
tlkh.lwz        - Towne Dialog. Similar to YEW.TLK.
tlki.lwz        - Towne Dialog. Similar to MINOC.TLK.
tlkj.lwz        - Towne Dialog. Similar to TRINSIC.TLK.
tlkk.lwz        - Towne Dialog. Similar to SKARA.TLK.
tlkm.lwz        - Towne Dialog. Similar to PAWS.TLK.
tlkp.lwz        - Towne Dialog. Similar to COVE.TLK.


References
----------

Apple File Formats (distributed with XU4)
    - http://xu4.sourceforge.net
Atari ST File Formats
    - http://www.geocities.com/nodling/ultima/text/ultima4/u4atarist.txt
LZW Data Compression
    - http://marknelson.us/1989/10/01/lzw-data-compression/
PC File Formats (distributed with XU4)
    - http://xu4.sourceforge.net