Internal Menus

Researched by SuperSaiyajinStackZ, Version: 0.1.1.

Notes

Here are some related notes for the Internal Menus.

Content	Address
Active Menu ID	03004720
Last Menu ID	03004750
New Menu ID	03004770
Base Function Pointer Init	08064F84
Base Function Pointer Handler	08064F88
Base Function Pointer Terminate	08064F8C

As listed on the Notes Section, there are 3 Menu IDs, Active Menu, Last Menu and New Menu.

The Active Menu has the following Section:

The Last Menu has the following Section:

The New Menu has the following Section:

In all cases, the first 4 bytes is the Menu ID (See below for the IDs).

Then it looks like each following 4 bytes are the Arguments. Like 03004774 - 03004777 is Argument 1, 03004778 - 0300477B is Argument 2 etc..

If switched to a new Menu

Set the New Menu ID + Arguments into 03004770, 03004774, 03004778 ….
Fade the screen out (Depends on the Menu).
Terminate the Active Menu.
Backup the Active Menu to 03004750 + Arguments to the Last Menu, then set the New Menu ID + Arguments into 03004720 (the Active Menu).
Initialize the New Menu.
Fade the screen in (Depends on the Menu).

If you are curious how to get the actual function start address, then here is how.

Note the value of: Function Pointer + (MenuID * C).
- Example with MenuID being 1A and the Function Pointer Init: 08064F84 + (1A * C) => 080650BC.
Read 4 bytes of the address from above.
- Example with reading it from the ROM: 2D 56 03 08 => 0803562D (The byte order needs to be swapped).

You can find a list of the Menu IDs below.

ID	Menu
0x0	Unused (just does bx lr)
0x1	In-Game
0x2	The dialog Menu with all the options you can do in-game (such as “What’s up?”)
0x3	Intro #1 (Copyright Scene)
0x4	Intro #2 (EA + Maxis brand Scene)
0x5	Main Menu with the Create-a-Sim, Load-a-Sim, … Options
0x6	The Slot Loading Menu
0x7	Unused (just does bx lr)
0x8	Multi Player Link Connection
0x9	In-Game SELECT Menu
0xA	Language Selection
0xB	Plot Points Menu
0xC	Cast Member Menu
0xD	Social Action / Conversation Menu
0xE	Inventory Menu
0xF	Episode Selection Menu
0x10	Shop Menu
0x11	Map
0x12	Unused (just does bx lr)
0x13	Unused (just does bx lr)
0x14	Bigfoot Love Chickens
0x15	Car Commercial
0x16	Message Box (Black screens if not used correctly)
0x17	Create-a-Sim Menu
0x18	Minigame Level Selection
0x19	Minigame results
0x1A	Keelhaulin’ Cards
0x1B	Cattle Cleanup
0x1C	Let’s watch the show!
0x1D	Goth Family Let’s watch the show!
0x1E	Options Menu with selecting an Episode etc
0x1F	King Chug Chug
0x20	Canyon Jumping
0x21	Credits
0x22	Chop Shop
0x23	Skills Menu
0x24	Testing Menu(?)
0x25	Dusty Hogg motorbike sharkpool cutscene
0x26	Game Ending cutscene
0x27	Minigames Menu

Some more Information about the Social Action / Conversation Menu.

Parameter	Address
Conversation Type	03004774
Conversation Partner ID	03004778

Conversation Type

The Conversation types are literally the following:

Everything above that from a first view seems to freeze.

Conversation Partner ID

Here is a list of the Partner IDs.

0x0 - 0xC seem to be some test cases or so, while 0xD - 0x26 are the actual valid IDs which the game sets.

0x27 and 0x28 are sorta test cases too(?).

0x29 and up just seem to freeze.

For more internal working to the Social Action / Conversation Menu, check out the Social Action / Conversation Page.

Some more Information about the Shop Menu.

Parameter	Address
Shop ID	03004778

There may be more Parameters, but so far only this one seems to be related.

Shop ID

Here is a list of the Shop IDs.

IDs above may re-use the Shop’s on the list.. or eventually crash.