SMW Memory Map
Misc.
Empty
Sprites
Player
Yoshi
Blocks
I/O
Graphics
Counter
Flag
Timer
Hardware mirror
Pointer
Palettes
Overworld
Camera
Should be 00
Misc.
ASM
Palette
Mario tilemap
Sprite tilemap related
Layer 3
Mario physics
Level data
Pointer
Mode 7 tilemap
Music
Sprite number
Debug
Sound effect
Timer
Graphics
Overworld border
Empty
Objects
Subroutine (JSx FIXME)
Sprite Subroutine (JSx FIXME)
Sprite Misc.
Coordinate
Level number
Controller
Overworld
Sprite physics
Stripe Image
Subroutine (JSR)
Subroutine (JSL)
Sprite subroutine (JSR)
Sprite subroutine (JSL)
SNES Register (PPU)
SNES Register (APU)
SNES Register (Hardware)
SNES Register (Controller)
SNES Register (DMA)
SA-1 Register (Write)
SA-1 Register (Read)
Super FX Register
MSU-1 Register (Read)
MSU-1 Register (Write)
Jump (JMP/JSR)
Jump (JML/JSL)
16-bit Pointer
24-bit Pointer
Opcode
Code
Table
Data
Hex Edit
Miscellaneous
Mario A
Mario B
Mario C
Backup
RAM Address
Length
Type
Description
Details
$7F837D
5118 bytes
Misc.
VRAM upload table, as a stripe image. Used for things that change in the middle of the screen, such as ? blocks. Uploaded and reset every frame; most frames, it's empty.
Not all of it is used during normal gameplay, so $7F:8600+ shouldn't be dangerous to use.
See here for more info.