YI Memory Map - SMW Central

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Address
Hexadecimal number for a partial address. 6-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.

$700000

112 bytes

Super FX

Scratch RAM, used like "registers" for various operations on the Super FX, also used as additional parameters to Super FX routines

$700070

1 byte

Controller

Controller Data 1 (for gamemode 0F):
AXLR----
A = A; X = X; L = L; R = R

$700071

1 byte

Controller

Controller Data 2 (for gamemode 0F):
byetUDLR
b = B; y = Y; e = Select; t = Start; U = up; D = down; L = left, R = right

$700072

1 byte

Controller

Controller Data 1, on press/first frame (for gamemode 0F):
AXLR----
A = A; X = X; L = L; R = R

$700073

1 byte

Controller

Controller Data 2, on press/first frame (for gamemode 0F):
byetUDLR
b = B; y = Y; e = select; t = Start; U = up; D = down; L = left, R = right

$700076

2 bytes

Sound Effect

Mirror of $7E0051 (register $2141) for GSU player control routine, used for transformations

$70007A

2 bytes

Sound Effect

Super FX sound ID, returned by GSU to push into sound queue (play a sound effect)

$700082

1 byte

Controller

Controller settings ($00 = patient; $02 = hasty)

$70008A

2 bytes

Misc.

Yoshi's X subpixel position (high byte is spillage)

$70008C

2 bytes

Misc.

Yoshi's X position

$70008E

2 bytes

Misc.

Yoshi's Y subpixel position (high byte is spillage)

$700090

2 bytes

Misc.

Yoshi's Y position

$700092

2 bytes

Misc.

Pointer to next free slot in OAM buffer

$700094

2 bytes

Misc.

Layer 1 Camera X

$700096

2 bytes

Misc.

Layer 2 Camera X

$700098

2 bytes

Misc.

Layer 3 Camera X

$70009A

2 bytes

Misc.

Layer 4 Camera X

$70009C

2 bytes

Misc.

Layer 1 Camera Y

$70009E

2 bytes

Misc.

Layer 2 Camera Y

$7000A0

2 bytes

Misc.

Layer 3 Camera Y

$7000A2

2 bytes

Misc.

Layer 4 Camera Y

$7000A4

2 bytes

Misc.

X position of the leftmost tiles on the screen

$7000A6

2 bytes

Misc.

Y position of the uppermost tiles on the screen

$7000A8

2 bytes

Misc.

Previous frame Yoshi's X velocity

$7000AA

2 bytes

Misc.

Yoshi's Y velocity

$7000AC

2 bytes

Misc.

Yoshi state:
$0000: Regular (player control)
$0002: Cutscenes; screen transition (pipe going right)
$0003: In screen transition (pipe going left)
$0004: In screen transition (pipe going down); in prologue cutscene (Baby Mario mounted)
$0005: In screen transition (pipe going up)
$0006: Entering/exiting pipe; in transition (pipe going right)
$0007: In screen transition (pipe going left)
$0008: In screen transition
$0009: In screen transition
$000A: Entering door
$000E: Dying from spike
$0010: Transforming
$0012: Smashed by falling wall (sprite $036)
$0014: Activating goal
$0016: During level intro
$0018: Being thrown toward baby mario at end of transformation
$001A: Dying in pit / inside piranha plant / receiving boss key / shrinking during Prince Froggy
$001C: During prologue cutscene
$001E: Pushed away in Raphael Cutscene
$0020: Entering Raphael Boss room (moon)
$0022: Entering keyhole during boss key cutscene
$0028: Dying from lava
$002A: Being ejected vertically (after transition)

$7000AE

2 bytes

Misc.

Yoshi form:
$0000: Yoshi
$0002: Car Yoshi
$0004: Mole Yoshi
$0006: Helicopter Yoshi
$0008: Train Yoshi
$000A: Mushroom Yoshi (Beta)
$000C: Sub Yoshi
$000E: Ski Yoshi
$0010: Super Baby Mario
$0012: Plane Yoshi (Beta)

$7000B0

2 bytes

Misc.

Yoshi's X position relative to camera

$7000B2

2 bytes

Misc.

Yoshi's Y position relative to camera

$7000B4

2 bytes

Misc.

Yoshi's X velocity

$7000B6

2 bytes

Misc.

Angle of ground Yoshi is on

$7000B8

2 bytes

Misc.

Angle of terrain slope that Yoshi's top is colliding with

$7000BA

2 bytes

Misc.

Angle of terrain slope that Yoshi's middle part is colliding with

$7000BC

2 bytes

Misc.

Angle of terrain slope that Yoshi's bottom part is colliding with

$7000BE

2 bytes

Misc.

Yoshi's current animation frame

$7000C0

2 bytes

Player Physics

Yoshi's jump state:
$0006: Jumping
$0007: Peak of jump
$0008: Falling

$7000C2

2 bytes

Player Physics

Yoshi's ducking state:
$0000: not ducking
$0001-$0004: mid-duck / mid-duck release
$0005: fully ducked

$7000C4

2 bytes

Misc.

Yoshi facing direction ($0000: right, $0002: left)

$7000C6

2 bytes

Player Physics

Yoshi swimming state:
$0000: not swimming
$0001: landing in water, no player control
$0002: feet up briefly after landing
$0003: swimming

$7000CC

1 byte

Misc.

Direction player last accelerated from input:
$00: not moving
$01: right
$02: left

$7000CE

2 bytes

Flag

$004C: Player is holding Up while on ground, $0000 not

$7000D2

1 byte

Misc.

Yoshi fluttering state:
$00: After a flutter, midair
$01: Not in a flutter chain: resets to this upon hitting ground or ceiling
$02: Begin flutter
$04, $06, $08: Mid-flutter states

$7000D3

1 byte

Flag

$80: extended fluttering, $00 not

$7000D4

2 bytes

Misc.

Ground pound state:
$0001~$0006: init states
$0007: falling
$0008~$000B: hitting the ground
$000C: fully on ground, other actions enabled

$7000D6

2 bytes

Misc.

Frame counter for holding Down button in air to ground pound. When it reaches $0007, ground pound will initiate. Set to $FFFF when pressing down on ground

$7000DA

2 bytes

Player Physics

Yoshi's stair state/counter, counts down/up in between steps on stairs (only high byte is used):
$0800 to $0100 for left-facing stairs
$F800 to $FF00 for right-facing stairs

$7000DC

2 bytes

Misc.

Frame counter for pushing yourself against a wall / a pushable sprite. The pushing animation starts at $10, and it loops at $23. NOTE: For pushable sprites, the entire range is +1 so starts at $01, $11 is animation, stops at $24.

$7000DE

2 bytes

Misc.

Egg throwing state (decrements over time):
$0007~$000A: init
$0006: cursor out, ready to throw
$0001~$0005: has been thrown
$0000: not throwing

$7000E0

2 bytes

Misc.

Egg cursor distance from Yoshi:
Byte 1: Subpixels
Byte 2: Pixels

$7000E4

2 bytes

Misc.

Egg cursor X position

When spitting an enemy this is used together with player speed to set enemy X-speed

$7000E6

2 bytes

Misc.

Egg cursor Y position

When spitting an enemy this is used subtracted with constant $0200 to set enemy y-speed

$7000E8

2 bytes

Misc.

Frame counter for holding the Down button to cancel egg throw (up to $0007 then it cancels)

$7000EA

2 bytes

Flag

$FFFF = Egg cursor locked with L/R, $0000 = not locked

$7000EC

2 bytes

Flag

Egg aiming flag:
$FFFF: Have eggs, can aim
$0000: No eggs, can't aim
$0002: In water, can't aim

$7000EE

2 bytes

Misc.

Egg cursor angle, ranges from $0000 = lowest, to $2E00 = highest

$7000F0

2 bytes

Misc.

Angular velocity of egg cursor (fixed point)

$7000F2

2 bytes

Misc.

How much Yoshi is stumbling during fuzzied state, starts at $00 and increments or decrements by $02 until threshold point, then begins stumbling:
$001A: stumble forward threshold
$FFE6: stumble backward threshold

$7000F4

2 bytes

Misc.

Direction Yoshi is currently leaning during fuzzied state, relative to Yoshi's current facing:
$0002: forward
$FFFE: backwards

$7000F6

2 bytes

Misc.

Yoshi idle animation state:
$0000: Stepping in place
$0002: Blinking
$0004: Scratching nose
$0006: Turning around

$7000F8

2 bytes

Misc.

Running animation state:
alternates between $0000 and $0002 while running
pre/post-run: $0000 - $0012, increments by $02

$7000FA

2 bytes

Misc.

Current ground type Yoshi is on:
$0000: Ground
$0001: Water
$0002: ????
$0003: Ice
$0004: Snow
$0005: Mud

$7000FC

2 bytes

Misc.

Player collision with MAP16 terrain, format: 0000000L lRrTtBMb
L = left, head
l = left, body
R = right, head
r = right, body
T = top, left half
t = top, right half
B = bottom, left third
M = bottom, middle third
b = bottom, right third

$7000FE

2 bytes

Misc.

Player collision with water, same format as $7000FC

$700100

2 bytes

Misc.

Player collision with cross section tiles, same format as $7000FC

$700102

2 bytes

Flag

$0001 when on a Spiky Stake ($0000 means not)

$700104

2 bytes

Misc.

Current door exit type:
$0000: Regular door / boss door
$0100: Sewer pipe hole (like in 4-E)
$FFFF: Bandit mini-game door

$700106

1 byte

Misc.

Pipe entrance/exit transition type:
$02 = Going right
$04 = Going left
$06 = Going down
$08 = Going up

$700107

1 byte

Misc.

Pipe entrance/exit transition type:
$00 = Vertical, going in pipe
$40 = Vertical, coming out of pipe
$80 = Horizontal, going in pipe
$C0 = Horizontal, coming out of pipe

$700108

2 bytes

Misc.

Distance Yoshi has travelled so far in vertical/horizontal pipe entrance transition, in pixels & subpixels ($ppss), fade & exit begins at $1F00 for both (NOTE: for horizontal it's basically a constant $0080 increase)

$70010A

2 bytes

Misc.

Yoshi's vertical pipe entrance animation state:
$0001-$0006: going down a pipe
$0001-$0009: going up a pipe

$70010C

2 bytes

Misc.

Yoshi's vertical pipe entrance acceleration: $0100 = 1 subpixel, low byte is subsubpixels

$70010E

2 bytes

Misc.

Before entering pipe: Yoshi's horizontal distance from vertical pipe entrance
During pipe entrance transition: Current horizontal position of pipe entrance

$700110

2 bytes

Misc.

While walking on mud/snow: Mirror of $7000F8, used for generating mud/snow particles
While sliding on mud: Distance slid, wraps around at $1FFF, used to generate mud splashes

$700112

2 bytes

Misc.

Car transformation wheel extension height, increments by 2, maxes at $0030

$700114

2 bytes

Misc.

Address of ROM graphics (bank $52) to DMA into VRAM at $4200-$43FF:
-Yoshi's tongue
-Yoshi egg during Super Star Mario
-Yoshi during bubble transformation

$700118

2 bytes

Sprite Tilemap

Pointer to "above" layer's OAM in OAM buffer

$70011A

2 bytes

Sprite Tilemap

Sprite priority # for "above" layer (sprites that show above Yoshi)

$70011C

2 bytes

Misc.

Center of Yoshi X position (Yoshi X + Yoshi width / 2)

$70011E

2 bytes

Misc.

Center of Yoshi Y position (Yoshi Y position + Yoshi height / 2)

$700120

2 bytes

Misc.

Yoshi's hitbox half width

$700122

2 bytes

Misc.

Yoshi's hitbox half height

$700124

2 bytes

Player Tilemap

Yoshi's OAM palette, ----ccc- part of yxppccct (OAM low table byte 4)

$700126

2 bytes

Player Tilemap

Yoshi's OAM priority, --pp---- part of yxppccct (OAM low table byte 4)

$700128

32 bytes

Player Tilemap

Yoshi & star counter graphics DMA queue, first 6 entries are Yoshi, last 2 are star counter number graphics, 4 bytes per:
Bytes 1-3: Long source address to DMA from; aa aa bb (a = address, b = bank) for top row DMA
Byte 4: high byte of address + 2, for bottom row DMA

$70014E

2 bytes

Misc.

Transformation state:
$0000: Not transforming

$700150

2 bytes

Misc.

Mouth state:
$00: doing nothing
$01: tongue horizontally growing or spitting
$02: tongue horizontally retracting
$03: tongue vertically growing or spitting
$04: tongue vertically retracting
$07, $0B, $0F, $13, $17, $1B, $1F, $23: States of swallowing non-egg sprites (star, nipper seed, coin, etc.)
$2F, $33, $37, $3B, $3F, $43, $47, $4B: States of swallowing egg-forming sprites

$700152

2 bytes

Player Physics

Tongue X length in pixels

$700154

2 bytes

Player Physics

Tongue Y height in pixels

$700156

2 bytes

Player Physics

Yoshi's X tongue position, relative to camera

$700158

2 bytes

Player Physics

Yoshi's Y tongue position, relative to camera

$70015A

2 bytes

Misc.

Yoshi's X tongue position

$70015C

2 bytes

Misc.

Yoshi's Y tongue position

$70015E

2 bytes

Misc.

Blocked Tongue States (e.g. tonguing walls)
Values $00 to $0F

$700160

2 bytes

Misc.

Inedible Tongue state (e.g. tonguing sprites like piranhas / chomp rocks)
Starts at $0014 and decrements until $0002. Zeroes out when tongue retracts.

$700162

2 bytes

Misc.

When Yoshi catches an enemy or item (e.g. melon, egg) with his tongue, this is set to the sprite slot value. The value stays so until Yoshi either eats or spits out the enemy or has used the item. This SRAM gets cleared immediatley if the enemy or item in question is inedible.

$700168

2 bytes

Misc.

Current sprite slot index (+1) being tongued/in mouth - sign bit turns on when unable to swallow

$70016A

2 bytes

Misc.

Type of ammunition in mouth:
$0001: Fire melon
$0002: Bubble
$0003: Green watermelon
$0004: Ice melon

$70016C

2 bytes

Misc.

Timer for duration of spitting a projectile, starts at $0000 and increments up to:
Watermelon seed: $0008
Fire melon: $002A
Ice melon: $0038
Bubble: $0018

$70016E

2 bytes

Misc.

Timer for intentional game freeze while tonguing a watermelon

$700170

2 bytes

Misc.

Ammunition count in mouth:
Bubble decrements 10 each spit, watermelon decrements 1 each spit, ice and fire melons decrement 10 each spit

$700172

2 bytes

Misc.

For ice and fire melons: X position of where flame/ice was spat
For watermelon seeds: # of seeds spat in succession during holding Y (loops from 0 to 6 then back to 0)

$700174

2 bytes

Misc.

Ice and fire melons: Y position of where ice/flame was spat

$70017E

2 bytes

Player Physics

Car Yoshi: left wheel X position

All other transformations: Rotation angle (mario low byte only)

$700180

2 bytes

Player Physics

Transformation value:
Helicopter: Rotation speed when hit. Starts at $1000, decreases by $20 each frame until $0700

Submarine: Rotation angle when hit. Starts at $0000, increments by $10 each frame until $0800

Train: Size counter when entering track. Starts at $00FF, decrements one per frame until $0070

Car: X-position in pixels

Super Baby Mario: $0007 when running on ground allowing for vertical climb

Mole: Orientation of vehicle:
$0000: 0°
$0001: 90°
$0002: 180°
$0003: 270°

Ski Yoshi: Snowball State, starts at $0080 when hit and increases by 2 every frame on the ground until value reaches $0100

$700182

2 bytes

Player Physics

Car Yoshi: right wheel X position

Helicopter: Animation frame (0-3) (turning around)

$700184

2 bytes

Player Physics

Car Yoshi left wheel Y position

$700188

2 bytes

Player Physics

Car Yoshi right wheel Y position

$700198

2 bytes

Player Physics

Transformation value:
Car: Y position of player / car
Super Baby Mario: Y scale, normalized at $0100

$7001AE

2 bytes

Flag

Disables control & animation of Yoshi

$7001B0

2 bytes

Flag

Disables updating & animation of sprites

$7001B2

2 bytes

Misc.

Baby Mario state info (set up like bit flags but never more than 1 on simultaneously):
$0000: Off of Yoshi, floating & crying
$2000: Super Baby Mario / Bonus challenge Mario
$4000: Seized by toadies/bandits/frogs
$8000: Riding Yoshi

$7001B4

2 bytes

Flag

Currently on a platform sprite (Chomp rock, Hint block, rotating platforms, etc.) - also counts the total number currently standing on

$7001B6

2 bytes

Sprite Number

Slot of platform sprite that Yoshi is on. Does not apply to every platform sprite, for example it does for some moving sprites such as Pinwheels, Chomp Rock, Poochy, Flatbed Ferries, Lakitu clouds etc., but not for Hint Blocks, Donut Lifts etc.

$7001B8

2 bytes

Flag

Previous frame's value of $7001B4

$7001BC

2 bytes

Sprite Physics

Where the water line starts for sprite physics
Only used for BG3 tilesets $13 (value $07B0) and $1D ($0700)
Value is left at $4000 when disabled
This doesn't affect regular water objects, only hardcoded water for certain BG3 tilesets.

$ssyy
ss = vertical screen number
yy = Y-position of water line

$7001C6

2 bytes

Misc.

Timer/index into camera Y offset table for small camera shaking (used by ground pounds, big egg ground impact, etc.)

$7001C8

2 bytes

Misc.

Timer/index into camera Y offset table for large camera shaking (used for falling chain chomps, chasing chain chomp hitting wall, etc.)

$7001CA

2 bytes

Layer 1 Tilemap

Special Offset-By-Tile Modes
$00: None (normal)
$01: Level Mode 2 (1-7, 6-4, 6-3)
$03: When Fuzzied
$05: Unused

$7001D0

2 bytes

Misc.

Timer for Yoshi's turning pose.
Starts at #$0004 when you change direction while in movement (ground or air), remains with this value for a brief time if you keep holding this direction until it starts decrementing each frame.

$7001D2

2 bytes

Misc.

Timer for each walking (not running) animation frame.

$7001D4

2 bytes

Misc.

Timer for each animation frame of the landing, start of falling and fluttering.

$7001D6

2 bytes

Misc.

Invincibility timer (starts at $00A0 on hit and decrements)

$7001D8

2 bytes

Misc.

Timer for each Yoshi idle animation state.

$7001DC

2 bytes

Misc.

Timer for bopping head in solid blocks animation. It's the exact time with zero y speed during the bop.

$7001DE

2 bytes

Misc.

Timer for ground pounding animation.

$7001E0

2 bytes

Misc.

Timer for mouth/tongue related animations.

$7001E2

2 bytes

Misc.

Egg throwing state timer

$7001EA

2 bytes

Timer

Particle generation timer for mud & snowy trees, initially set to $08 and zero means spawn in (if conditions met)

$7001EE

2 bytes

Misc.

Timer for sprite in Yoshi's mouth to be automatically swallowed. Starts off at $04B0 upon sprite entering mouth (even for inedible ones like the shell), counts down to $0000

$7001F4

2 bytes

Misc.

Transformation timer, counts down

$700200

2048 bytes

Misc.

OAM buffer. Split into 256 4-word entries, each one representing a possible entry in OAM:

Word 1: Screen-relative X coordinate (low byte copied into byte 1 of OAM low table mirror entry)
Word 2: Screen-relative Y coordinate (low byte copied into byte 2 of OAM low table mirror entry)
Word 3: Copied into OAM low table mirror entry bytes 3 & 4 (see OAM low table mirror $700A00 for details)
Word 4: -p----sx------sx, p = priority (0=forward, 1=reverse), s = size, x = 9th x bit (low byte copied into high table buffer entry)

NOTE: First 16 sprites are reserved for high priority items such as text and these are NOT handled by this buffer, thus copying begins at $700A40 for low table mirror and $700C30 for high table buffer.

Copying will continue until either the last entry of the OAM low table mirror ($700BFC) or the last entry of this buffer ($7009F8).

$700244

2 bytes

Player Physics

Yoshi's X subpixel position on a spinning wooden platform, unaffected by the rotation.

$700246

2 bytes

Player Physics

Yoshi's X position on a spinning wooden platform, unaffected by the rotation.

$700A00

512 bytes

Misc.

OAM low table mirror. 4-byte entries with format xxxxxxxx yyyyyyyy tttttttt yxppccct (x = X coordinate, y = Y coordinate, t = tile number, c = palette 0-7, p = priority, x&y = flip)

$700C00

32 bytes

Misc.

OAM high table mirror. 2 bits per entry, most significant X and size flag.

$700C20

128 bytes

Misc.

OAM high table buffer. Each entry is one byte which corresponds with one OAM entry. The 2 lowest bits of the byte get copied into the high table mirror ($700C00-$700C1F) and shifted into the correct spot for the entry.

$700CA0

2 bytes

Map

Island angle. Only low byte is used.

$700CAA

128 bytes

Misc.

Screen ID table: maps raw screen # ($00-$7F) to screen ID ($00-$3F). The sign bit on indicates "empty" screen (has no object at all), or camera is unable to scroll into the screen due extended object $FE, or tiles are erased in that screen by extended object $FF.

$700DAA

64 bytes

Misc.

BG1 - Left half of newest column spawned in, 32 SNES VRAM tilemap words, stored as a column but DMA'd to VRAM with increments of $40 to get to the next row each write and line up properly

$700DEA

64 bytes

Misc.

BG1 - Right half of newest column spawned in, 32 SNES VRAM tilemap words, stored as a column but DMA'd to VRAM with increments of $40 to get to the next row each write and line up properly

$700E2A

68 bytes

Misc.

BG1 - Top half of newest row spawned in, 34 SNES VRAM tilemap words, split into two separate DMA's - one for tilemap 1, one for tilemap 2

$700E6E

68 bytes

Misc.

BG1 - Bottom half of newest row spawned in, 34 SNES VRAM tilemap words, split into two separate DMA's - one for tilemap 1, one for tilemap 2

$700EB6

1 byte

Misc.

Spriteset file # 1 ($F7 index)