If you are still using the old URL (datacrystal.romhacking.net), please update your bookmarks! The old URL may stop working soon.
The current URL is datacrystal.tcrf.net.
The current URL is datacrystal.tcrf.net.
Pokémon Red and Blue/Notes
Jump to navigation
Jump to search
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
RGBY Map Headers & Stuff That Goes With It
Version 1.1
-Feel free to distribute this document and/or edit it.
-Try and credit people you get info from and/or write how you updated.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Things that need adding:
------------------------
More information about tilesets, and info about what sprites get loaded for
which maps.
Updates:
--------
v1.1: By Hat, minor improvements.
v1.0: Original version typed up by Hat.
Main Credits (Structure Information):
-------------------------------------
[Xeon]
Wrote some stuff about Map Headers and Object Data.
Which this document expands upon, a bit.
[F-Zero] & [Tauwasser]
Wrote a document (in German) explaining how GSC connection data is stored.
RGBY connection data is stored almost the same way, it turns out, so
that helped a great deal. All that is really different is the values you
add the amount of blocks to.
...............................................................................
Notes:
R/B Pointers to Map Headers: 0x01AE
R/B Map Header Banks: 0xC23D
R/B Pointer to Tileset Headers: 0xC767
Maximum tileset size in VRAM: 6 rows of 16 tiles (9000-95FF)
...............................................................................
===============================================================================
Tileset Header Structure (*Incomplete*)
===============================================================================
12 bytes per header...
Format:
~~~~~~~
[1 BYTE: Bank No. of Blocks/Tiles]
[2 BYTES: Pointer to Blocks (-10 for some reason)]
[2 BYTES: Pointer to Tiles]
[7 BYTES: ???]
last 7 bytes ideas: collison data pointer? something to do with animations?
===============================================================================
Map Header Structure
===============================================================================
Explanation:
~~~~~~~~~~~~
This contains all the data (pointers count as data) to build the map.
Format:
~~~~~~~
#1: [Tileset Number]
#2: [(Y Size) Map Height]
#3: [(X Size) Map Width]
#4-5: [*2 Bytes*: Pointer to Map]
#6-7: [*2 Bytes*: Pointer to Maps Text Pointers]
#8-9: [*2 Bytes*: Pointer to Maps "Script"]
#10: [Connection Byte:
00 = No Connections
01 = North
02 = West
03 = West + East
04 = South
05 = South + East
06 = South + West
07 = South + West + East
08 = North
09 = North + East
0A = North + West
0B = North + West + East
0C = North + South
0D = North + South + East
0E = North + South + West
0F = North + South + West + East]
?: [*11 Bytes per Connection*, No connections? Straight to "Object Data"!]
Last: [*2 Bytes*: Pointer to Object Data]
===============================================================================
1) Tileset Numbers
===============================================================================
The tileset descriptions are copied from a document compiled by Cartmic,
called "Pokemon Red Documents", which may help you with other stuff too.
Unchanged R/B Locations/Tileset No./Tileset Descriptions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C7BE; 00: "Outside"C7CA; 01: "Ash's House (#1)"
C7D6; 02: "Pokemon Center (#1)"
C7E2; 03: "Viridian Forest"
C7EE; 04: "Ash's House (#2)"
C7FA; 05: "Gym (#1)"
C806; 06: "Pokemon Center (#2)"
C812; 07: "Gym (#2)"
C81E; 08: "House"
C82A; 09: "Museum (#1)"
C836; 0A: "Museum (#2)"
C842; 0B: "Underground Path"
C84E; 0C: "Museum (#3)"
C85A; 0D: "S.S. Anne"
C866; 0E: "Vermilion Port"
C872; 0F: "Pokemon Cemetery"
C87E; 10: "Silph Co."
C88A; 11: "Cave"
C896; 12: "Celadon Mart"
C8A2; 13: "Game Freak HQ"
C8AE; 14: "Lab"
C8BA; 15: "Bike Shop/Cable Center"
C8C6; 16: "Cinnabar Mansion/Power Plant etc"
C8D2; 17: "Indigo Plateau"
NOTE: As you can see there's multiple copies of some tileset headers. They are
literally copies, you only need 1 copy, but you will need to make sure all maps
using that tileset are set to using that tileset number, then you can use the
free space for more tilesets.
===============================================================================
2 & 3) Map Height (Y) & Width (X)
===============================================================================
Exactly that, the amount of blocks high and wide the map data is.
===============================================================================
4 & 5) Map Data Pointer
===============================================================================
You can use the GoldMap engine for hacking map data quite easily.
The map you walk around on and stuff is stored as block indexes.
A single block consists of 4*4 tiles.
===============================================================================
6 & 7) Pointer to Maps Text Pointers
===============================================================================
2 byte pointers to text that is used on that map.
===============================================================================
8 & 9) Pointer to Maps "Script"
===============================================================================
ASM used on that map, chances are if there's something on a map you can't find
elsewhere you might easily be able to find it here, using a hex search
function. You can find things like XY positions of Poke Balls and 1-time
only Pokemon.
===============================================================================
10) Connection Byte
===============================================================================
Note:
~~~~~
If this value is 00h it is immediately followed by the Object Data
Pointer, no gap. Repeated list...
Connection Byte:
00 = No Connections
01 = North
02 = West
03 = West + East
04 = South
05 = South + East
06 = South + West
07 = South + West + East
08 = North
09 = North + East
0A = North + West
0B = North + West + East
0C = North + South
0D = North + South + East
0E = North + South + West
0F = North + South + West + East
===============================================================================
?) Connection Data (0-44 bytes, explained in more depth: further down)
===============================================================================
===============================================================================
Last) Object Data Pointer
===============================================================================
The last thing in the Map Header. It points to a bunch of certain stuff that
is stored in similar structures.
Object Data is discussed at the end of this document.
...............................................................................
===============================================================================
*** Hacking Connections ***
This will certainly require planning, with no background distractions.
Unless a editor gets built that can hack the connections for RGBY.
===============================================================================
Explanation:
~~~~~~~~~~~~
The "Connection Byte" determines how many connections are in this space,
including none at all.
Structure:
~~~~~~~~~~
#1: [Map Index of Connected Map]
#2-3: [Pointer to "Connection Strip"s Upperleft Block (Connected Map)]
#4-5: [Pointer to "Connection Strip"s Upperleft Block (Current Map)]
#6: ["Bigness"]
#7: [Map Width]
#8: [Y alignment]
#9: [X alignment]
#10-11: [Window]
PKMN Red Example -- Saffron City (Header: 0x509A4) Diagram:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Saffrons need-to-know stats:
Block Height (Y): 12
Block Width (X): 14
Connection Byte: 0F (North + South + West + East)
- - - -
+ = current maps border blocks
++++++++NNNNNNNNNN++++++++
++++++++NNNNNNNNNN++++++++
++++++++NNNNNNNNNN++++++++
+++####################+++
+++####################+++
+++####### My #########+++
+++####################+++
WWW####### Name's #####EEE
WWW####################EEE
WWW###### Saffron #####EEE
WWW####################EEE
WWW###### City! #######EEE
WWW####################EEE
WWW####################EEE
WWW####################EEE
WWW####################EEE
+++####################+++
+++####################+++
+++####################+++
+++####################+++
+++####################+++
++++++++SSSSSSSSSS++++++++
++++++++SSSSSSSSSS++++++++
++++++++SSSSSSSSSS++++++++
Connection to Route 5 (to the North)
*Y: 12
*X: 0A
*X_Movement_of_Connection Strip = 5
Map Index: 10
Connection Strip: 4668
Where Connected: C6F0 (C6EB + 5)
"Bigness": 0A
Width: 0A
Y alignment: 23 (12 * 2 - 1)
X alignment: F6 (5 * -2)
Window: C809 (C6E9 + (12 * (0A + 6)))
Connection to Route 6 (to the South)
*Y: 12
*X: 0A
*X_Movement_of_Connection Strip = 5
Map Index: 11
Connection Strip: 4079
Where Connected: C912 (C6EB + ((12 + 3) * (14 + 6)) + 5)
"Bigness": 0A
Width: 0A
Y alignment: 00
X alignment: F6 (5 * -2)
Window: C6F9 (C6EF + 0A)
Connection to Route 7 (to the West)
*Y: 09
*X: 0A
*Y_Movement_of_Connection Strip = 4
Map Index: 12
Connection Strip: 4058
Where Connected: C79E (C6E8 + (14 + 6) * (4 + 3))
"Bigness": 09
Width: 0A
Y alignment: F8 (4 * -2)
X alignment: 13 ((0A * 2) - 1)
Window: C702 (C6EE + (0A * 2))
Connection to Route 8 (to the East)
*Y: 09
*X: 1E
*Y_Movement_of_Connection Strip = 4
Map Index: 13
Connection Strip: 41C6
Where Connected: C7B5 (C6E5 + (14 + 6) * (4 + 4))
"Bigness": 09
Width: 1E
Y alignment: F8 (4 * -2)
X alignment: 00
Window: C70D (C6EF + 1E)
===============================================================================
#1 : Map Indexes
===============================================================================
Not included! Download UltraMap, the text file known as "RedEnglish.ini"
contains all the Map Indexes in decimal for R/B, which you'll obviously need
to convert to hex.
===============================================================================
#2-#3 : "Connection Strip" Location
===============================================================================
The "connection strip" pointer -- points to the area of the connected map that
is visible when standing before you even enter it. Points to the upperleft
block of the "connection strip".
* connection strip is always 3 blocks wide (E/W connection)
3 blocks high (N/S connection)
===============================================================================
#4-#5 : Current Map Position
===============================================================================
This points to the part of the current map (further up in RAM)
that the connection strips upperleft block is placed on the current map.
____________________
Connection |
Direction | Formula
___________|_______
North: C6EB + X_Movement_of_Connection Strip
South: C6EB + (Height of Map + 3) * (Width of Map + 6) +
X_Movement_of_Connection Strip
West: C6E8 + (Width of Map + 6) * (Y_Movement_of_"Connection Strip" + 3)
East: C6E5 + (Width of Map + 6) * (Y_Movement_of_"Connection Strip" + 4)
===============================================================================
#6 : Map "Bigness"
===============================================================================
North/South Connection = Connected Maps Width
East/West Connection = Connected Maps Height
===============================================================================
#7 : Map Width
===============================================================================
The width of the connected map.
===============================================================================
#8 : Y alignment
===============================================================================
Relative Y-position of player after entering connected map.
____________________
Connection |
Direction | Formula
___________|_______
North: (Height_of_connected_map * 2) - 1
South: 0
West/East: (Y_movement_of_connection_strip_in_blocks * -2)
===============================================================================
#9 : X alignment
===============================================================================
Relative X-Position of player after entering connected map.
____________________
Connection |
Direction | Formula
___________|_______
North/South: (X_movement_of_connection_strip_in_blocks * -2)
West: (Width_of_connected_map * 2) - 1
East: 0
===============================================================================
#10-#11 : Window
===============================================================================
Position of the upper left block after entering the Map.
____________________
Connection |
Direction | Formula
___________|_______
Above: C6E9h + Height_of_connected_map * (Width_of_connected_map + 6)
South/East: C6EFh + Width_of_connected_map
West: C6EEh + 2 * Width_of_connected_map
...............................................................................
===============================================================================
Object Data: General Structure
===============================================================================
Object Data
===========
[Maps Border Tile]
[Number of Warps][Warp Data]
[Number of Signs][Sign Data]
[Number of People/Trainers/Items]
[People Data]
[Trainer Data]
[Item Data]
[Warp-To Data]
Warps:
------
[Y position][X position][Warp-To Point][Warp-To Map]
Signposts:
----------
[Y position][X position][Text String Number]
Normal People:
--------------
[Picture Number][Y position + 4][X position + 4]
[Movement 1][Movement 2][Text String Number]
Trainers:
---------
[Picture Number][Y position + 4][X position + 4]
[Movement 1][Movement 2][Text String Number]
[Trainer Type][Pokemon Set]
Items:
---------------------
[Picture Number][Y position + 4][X position + 4]
[Movement 1][Movement 2][Text String Number]
[Item Number]
Warp-To Points
--------------
[*2 Bytes*: Event Displacement][Y position][X position]
Event Displacement Formula:
~~~~~~~~~~~~~~~~~~~~~~~~~~~
C6E3 + ((Map width + 8) * (rows above + 1)) + (X movement + 4)
###############################################################################