SM64 Memory Map - SMW Central

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Address
Hexadecimal number for a partial address. 8-digit number for a full address. Use - to denote a range. Use , to list more than one address.

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Description
Separate each individual keyword with spaces. Surround a phrase with quotes to look for the exact phrase, or with / to use a PCRE regular expression. Prepend with - to exclude a keyword or phrase, with + to require a whole word or phrase, or with -+ to exclude a whole word or phrase. ? matches any character, * matches any amount of characters.

$80064F80

Unknown

Misc.

Global

Segment 0x02 constant location - Contains image data for the hud symbols and other textures. The segment is allocated by a hardcoded routine on startup.

$8006C680

Unknown

Misc.

Global

Table with segment-offset pointers to the HUD symbol textures. Since some of the HUD symbols were removed in the USA release, some of the slots are left empty:

8006C6CC 00000000 - J
8006C6E8 00000000 - Q
8006C6FC 00000000 - V
8006C704 00000000 - X
8006C70C 00000000 - Z

You can restore the old symbols by patching in the images from the Japanese ROM, and modifying the pointers in this table.

$8007E200

Unknown

Misc.

Global

Segment 0x15

$8007EC20

Unknown

Misc.

Global

Segment 0x04 - Contains the data for Mario's model

$800EB180

Unknown

Misc.

Global

Segment 0x13 - Behavior script segment

$800EC5F8

52 bytes

Behaviour

Global

Behavior script - Purple switch

$800ED3FC

32 bytes

Behaviour

Global

Behavior script - Spinning exclamation point

$800EDBC8

12 bytes

Behaviour

Global

Behavior script - Misc level architecture (eg the castle tower)

$800EDC24

44 bytes

Behaviour

Global

Tree's behavior script

$800EE040

56 bytes

Behaviour

Global

Mario's behavior script

00000000
10050000
11010100
11030001
23000000 002500A0
08000000
0C000000 802CB1C0
0C000000 8029CA58
0C000000 802CB264
09000000

$800EE2F4

56 bytes

Behaviour

Global

Bob-omb's behavior script

$800F0860

Unknown

Geometry Layout

Global

Mario's decompressed geo-layout script

$800F8C4C

Unknown

Geometry Layout

Global

Decompressed geo-layout script for signs

$8018D47C

554 bytes

Geometry Layout

Global

Bob-omb's decompressed geo-layout

$80195C54

Unknown

Geometry Layout

Overworld

Decompressed geo-layout script for the castle tower

$801C1000

Unknown

Misc.

Global

Segment 0x09 constant location. All level mesh textures are loaded here by the 0x1A level script command.

$80207700

512 bytes

Misc.

Global

Start of EEPROM and goes up to 0x80207900

$80277EE0

Unknown

Routine

Global

Function that assigns ram segments

Arguments: A0 = segment number, A1 = ram address
Returns: V0 = 0x80-prefix-less ram address

Essentially just: *(uint32*)(0x8033B400 + segment_number << 2) = ram_address & 0x00FFFFFF;

$80277F50

Unknown

Routine

Global

Segment-offset to true ram address converter
Arguments: A0 = segmented address
Returns: V0 = true ram address

$80278120

118 bytes

Routine

Global

Function that seems to be a memory allocator. Basically finds a desired amount of free space in the heap and returns a pointer to the area.

Arguments: A0 = block size
Returns: V0 = ram address

$80278504

264 bytes

Routine

Global

DmaCopy(u32 dst, u32 bottom, u32 top);
dst being the RAM offset! bottom is the beginning ROM offset to copy the bytes and top is the end.
Takes three arguments.

Example:
ADDIU SP, SP, $FFE8 ; -24 to stack. Aka, make space.
SW RA, $0014 (SP) ; Push return address to stack.
LUI A0, $8034 ; Upper half address.
ORI A0, A0, $269D ; Lower half address. A0 = $8034269D
LUI A1, $001C ; ROM offset start (bottom)
ORI A1, $0D60 ; Lower part, A1 = $001C0D60
LUI A2, $0020 ; ROM offset end (top)
JAL $80278504 ; Jump to subroutine DmaCopy
ORI A2, $00D1 ; Is executed before JAL. Lower half.
LW RA, $0014 (SP) ; Load back our lost return address.
JR RA ; Jump to return address.
ADDIU SP, SP, $0018 ; Restores stack. (+24)

DmaCopy basically copies data from ROM to RAM. dst is the destination (as RAM offset), bottom is the start (as ROM offset) which is copied to RAM and top is the end. So, in our above example bytes from $001C0D60 (ROM) to $002000D1 (ROM) into $8034269D (RAM).

$80278610

124 bytes

Routine

Global

Function that loads data from rom into the heap and returns a ram pointer to the data.

Arguments: A0 = rom start address, A1 = rom end address, A2 = allocation size (seems mostly unused?)
Returns: V0 = pointer to data after being loaded into ram

$802787D8

216 bytes

Routine

Global

Function that loads MIO0 files into ram segments.
Arguments: A0 = ram segment number, A1 = rom address start, A2 = rom address end

$802792C0

84 bytes

Routine

Global

EEPROM Save file checksum calculation routine
Arguments: A0 = address of buffer, A1 = buffer size, A2 = ? 00004441
Returns: 2 byte checksum to V0

$8027F4E0

164 bytes