SMW 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.

Length

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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.

$7E0000

16 bytes

Misc.

Scratch RAM, is and can be used for a big number of purposes. The general purpose is temporarily preserving a value for later use in a routine.
Of note is the following address, used in LM ASM hacks:
$7E:0003 (16-bit) - Block number from LM Map16 editor. Also used in the custom Map16 tile change routine.

$7E0010

1 byte

Flag

If the value in it is not zero, run the actual game; otherwise, loop forever. It's set to a non-zero value during NMI, and it's set to zero after the game mode has been run, so that the game runs exactly once a frame - one NMI trigger per frame.

$7E0011

1 byte

Flag

Used to distinguish IRQ #1 from IRQ #2's code. (Inside the Morton/Ludwig/Roy room, where IRQ is used twice, although it can be used in other areas that run IRQ as well.) #$00 = IRQ #1; #$01 = IRQ #2.

$7E0012

1 byte

Graphics

Stripe image loader - value must be divisible by 3.
A list of valid values can be found here.

Valid Values

$7E0013

1 byte

Counter

"True" frame counter. Increments once per frame, except when the game is lagging. Note that $7E:0014 is better suited for most purposes.

$7E0014

1 byte

Counter

"Effective" frame counter. Stops when, for example, RAM addresses such as $7E:009D are not zero (lock sprite flag, usually indicates the player is dying, grabbing a powerup, or something similar). Inside sprite code, this address is often preferred over $7E:0013, especially in graphics routines, as graphics will not be updated when the player dies if this address is used as an index to the tilemap.

$7E0015

1 byte

I/O

Controller buttons currently held down. Format: byetUDLR.
b = A or B; y = X or Y; e = select; t = Start; U = up; D = down; L = left, R = right.

$7E0016

1 byte

I/O

Controller buttons newly pressed this frame. Format: byetUDLR.
b = B only; y = X or Y; e = select; t = Start; U = up; D = down; L = left, R = right.

$7E0017

1 byte

I/O

Controller buttons currently held down. Format: axlr----.
a = A; x = X; l = L; r = R, - = null/unused.

$7E0018

1 byte

I/O

Controller buttons newly pressed this frame. Format: axlr----.
a = A; x = X; l = L; r = R, - = null/unused.

$7E0019

1 byte

Player

Player powerup/status. #$00 = small; #$01 = big; #$02 = cape; #$03 = fire.

$7E001A

2 bytes

Hardware mirror

Layer 1 X position, current frame. Mirror of SNES register $210D.

$7E001C

2 bytes

Hardware mirror

Layer 1 Y position, current frame. Mirror of SNES register $210E.

$7E001E

2 bytes

Hardware mirror

Layer 2 X position, current frame. Mirror of SNES register $210F.

$7E0020

2 bytes

Hardware mirror

Layer 2 Y position, current frame. Mirror of SNES register $2110.

$7E0022

2 bytes

Hardware mirror

Layer 3 X position. Mirror of SNES register $2111.

$7E0024

2 bytes

Hardware mirror

Layer 3 Y position. Mirror of SNES register $2112.

$7E0026

2 bytes

Misc.

Depending on Layer 3 tides being activated or not, it's either:

Not activated:
Layer 2 X position minus Layer 1 X position.
Activated:
Layer 3 X position minus Layer 1 X position.

Used for various things, among which interaction with multiple layers is included.

$7E0028

2 bytes

Misc.

Depending on Layer 3 tides being activated or not, it's either:

Not activated:
Layer 2 Y position minus Layer 1 Y position.
Activated:
Layer 3 Y position minus Layer 1 Y position.

Used for various things, among which interaction with multiple layers is included.

$7E002A

2 bytes

Hardware mirror

Mode 7 Center X position. Mirror of SNES register $211F, + #$0080.

$7E002C

2 bytes

Hardware mirror

Mode 7 Center Y position. Mirror of SNES register $2120, + #$0080.

$7E002E

2 bytes

Hardware mirror

Mode 7 matrix parameter A. Mirror of SNES register $211B.