SM64 Segment 02

[queueRAM]

Segment 02 in SM64 contains the font textures (HUD, dialog, credits), transition textures, font tables, dialog text, level names, and act names.  Documentation is also on the SM64 Segment 2 wiki page and am included the notes here. I am also attaching my assembly file which is a complete deconstruction of this segment and can be used to regenerate the exact segment 2 binary using the armips assembler.

Code:

Start End Description 0x00000 0x049FF Large font and HUD textures 0x04A00 0x058FF Credits font textures 0x05900 0x06FFF Small dialog font textures 0x07000 0x076FF HUD camera textures 0x07700 0x077E7 HUD lookup table 0x077E8 0x07BE7 Small dialog font lookup table 0x07BE8 0x07C7B Credits font lookup table 0x07C7C 0x07C93 HUD camera lookup table 0x07C94 0x07D07 Some unused dialog-encoded text 0x07D08 0x07D33 Unused text lookup table 0x07D34 0x0FFC7 Dialog text 0x0FFC8 0x10D13 Dialog lookup table 0x10D14 0x10F67 Level names text 0x10F68 0x10FD3 Level names lookup table 0x10FD4 0x1192B Act names text 0x1192C 0x11ABF Act names lookup table 0x11AC0 0x120B7 F3D display lists and vertices 0x120B8 0x172B7 Shadow, transition, other textures 0x172B8 0x172CF Unused. Looks like lighting parameters 0x172D0 0x178BF Matrices, F3D display lists, vertices 0x178C0 0x18A0D Paintings mesh vertices, triangles

Interesting Finds
In addition to the dialog, level names, and act names, there is an unused section encoded in a similar manner starting at offset 0x7C94. Decoding it reveals something like the listing below. The hex values don't line up to any characters in the (U) ROM dialog lookup table, but they may be remnants from the (J) ROM. I may try to decode these later to see if it reveals anything interesting about the stages available in the stage select.

Code:

db "STAGE SELECT\n"...

I dug into the (J) ROM and found the same messages at offset 0x87E4 and 0x883C.

Code:

STAGE SELECT つづける? 1 マウンテン 2 ファイアーバブル 3 スノースライダー 4 ウォーターランド クッパ１ごう もどる PAUSE つづける? やめる?

Translations (thanks to Rena, jrra, and Fendoroid):

Code:

STAGE SELECT Continue? 1 Mountain 2 Fire bubble 3 Snow slide 4 Water land Bowser number 1 Back PAUSE Continue? Quit?

Japanese dialog font table:


There is a peculiar up arrow texture stored at offset 0x17698, right in the middle of some F3D display lists. I don't recall seeing it in the game. It is the first arrow listed in the picture below. The other font textures that look like arrows are listed for reference as well.


The ambient and diffuse lighting parameters for the paintings are stored at offsets 0x177B8 and 0x177C0 respectively. You can use this to change how the paintings are rendered while animating. Here, I made the diffuse color red instead of white.


The vertex and triangle data used to construct the animated painting triangle mesh is stored at offset 0x178C0 (0x81AA16 extended ROM) and takes the following format. The Z values of the vertices don't matter as they are controlled by code, but the X and Y can be adjusted for some interesting results. I tried changing the order of the last triangle table, but it just locked up the game when I touched a painting, so it means something.

Code:

178C0-178C1: u16 vertex count (0x009D=157) 178C2-17C6F: i16 x, y, z vertices (157*6 bytes) 17C70-17C71: u16 triangle count (0x0108=264) 17C72-182A1: u16 3x triangle indexes (264*6 bytes) 182A2-18A0D: triangle indexes

As a test, I compressed the top and bottom triangles and expanded the middle ones as shown. Looks pretty bad in game:

[Kaze]

Did you also investigate the "0x11AC0 0x120B7 F3D display lists and vertices" area? if not, here are just 2 more random things i found in segment 2 to add to the list:
02011c48 - text box background DL, also seems to be used in the pause menu
02011cc8 - text letters pre display list, sets color and some other settings