YI Memory Map - SMW Central

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Summer C3 2020 Content Spotlight

Telinc1's "ASM Odds and Ends"!

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RAM Address	Length	Type	Description	Details
$7E0000	48 bytes	Misc.	Scratch RAM, used like "registers" for various operations
$7E0030	2 bytes	Timer	Frame counter
$7E0032	3 bytes	Pointer	Pointer to level object data
$7E0035	1 byte	Controller	Controller 1 Data 1, mirror of $7E093C
$7E0036	1 byte	Controller	Controller 1 Data 2, mirror of $7E093D
$7E0037	1 byte	Controller	Controller 1 Data 1 on press/first frame, mirror of $7E093E
$7E0038	1 byte	Controller	Controller 1 Data 2 on press/first frame, mirror of $7E093F
$7E0039	2 bytes	Misc.	Layer 1 Camera X
$7E003B	2 bytes	Misc.	Layer 1 Camera Y
$7E003D	2 bytes	Misc.	Layer 2 Camera X
$7E003F	2 bytes	Misc.	Layer 2 Camera Y
$7E0041	2 bytes	Misc.	Layer 3 Camera X (also for World Map)
$7E0043	2 bytes	Misc.	Layer 3 Camera Y
$7E0045	2 bytes	Misc.	Layer 4 Camera X
$7E0047	2 bytes	Misc.	Layer 4 Camera Y
$7E0049	4 bytes	Empty	Unused RAM, cleared (with $00) during every loading screen
$7E004D	2 bytes	Sound Effect	Music track to be played - mirror of hardware register $2140 (APU I/O 0)
$7E004F	2 bytes	Sound Effect	Previous value of $7E004D (if previous == current value of hardware register $2140, do not write to register)
$7E0051	2 bytes	Sound Effect	Mirror of hardware register $2141 (APU I/O 1, pseudo-noise loop)
$7E0053	2 bytes	Sound Effect	Sound ID to be played instantly, bypasses the sound queue, directly written to hardware register $2143
$7E0055	2 bytes	Sound Effect	Previous value of $7E0053 (if previous == current value in hardware register $2143, do not write to register)
$7E0057	2 bytes	Sound Effect	Current size of sound queue (capacity 7)
$7E0059	16 bytes	Sound Effect	Sound effect queue, NOT all sounds currently playing, but instead all sound ID's (1 byte per) to be submitted for play at the current time; each frame the queue index decrements, meaning at most one sound submitted per frame
$7E0069	2 bytes	Map	World Map: Layer 1 scroll Mirrored by $7E006D
$7E006B	2 bytes	Misc.	Yoshi's jump state, mirror of $7000C0
$7E006D	2 bytes	Map	World Map: Layer 2 scroll
$7E0072	2 bytes	Map	World Map: Current stage Yoshi sprite Y coordinate
$7E0073	2 bytes	Misc.	$0000: Camera is moving right $0002: Camera is moving left
$7E0075	2 bytes	Misc.	$0000: Camera moving down $0002: Camera moving up
$7E0076	2 bytes	Map	World Map: Current stage Yoshi sprite X coordinate
$7E0077	2 bytes	Misc.	Flag: A new column has been spawned in
$7E0079	2 bytes	Map	World Map: X Scroll destination
$7E0079	2 bytes	Misc.	Flag: A new row has been spawned in
$7E007B	2 bytes	Layer 1 Tilemap	VRAM foreground tilemap address of most recently loaded column
$7E007D	2 bytes	Layer 1 Tilemap	VRAM foreground tilemap address of most recently loaded row
$7E007F	2 bytes	Layer 1 Tilemap	7E007B + 1 (right half of column)
$7E0081	2 bytes	Layer 1 Tilemap	7E007D with $0400 bit flipped (even/odd counterpart of tilemap row)
$7E0083	2 bytes	Misc.	Negative camera X column of newly spawned row shifted to: 0000000000cccc00
$7E0085	2 bytes	Layer 1 Tilemap	7E007D + $20 (bottom half of row)
$7E0087	2 bytes	Misc.	Camera X column + 1 of newly spawned row, shifted to: 0000000000cccc00
$7E0089	2 bytes	Misc.	Game Over screen state: $0000: nothing $0002: fading in $0004: active $0006: option chosen $0008: load title screen
$7E0089	2 bytes	Layer 1 Tilemap	7E0081 + $20 (second part of even/odd counterpart of tilemap row)
$7E008B	2 bytes	Misc.	Most recently spawned row's Y coordinate
$7E0091	8 bytes	Misc.	Game Over screen: Letter rotation values (Y axis), 1 byte per letter, from right to left ('R', 'E', ... 'A', 'G')
$7E0099	8 bytes	Misc.	Game Over screen: Letter rotation values (X axis), 1 byte per letter, letters from right to left ('R', 'E', ... 'A', 'G')
$7E00A1	16 bytes	Misc.	Game Over screen: Letter X coordinates, 1 word per letter, from left to right ('G', 'A', .. 'E', 'R')
$7E00B1	16 bytes	Misc.	Game Over screen: Letter Y coordinates, 1 word per letter, from left to right ('G', 'A', .. 'E', 'R')
$7E00C1	2 bytes	Misc.	Game Over screen: Scale value (size) of letters
$7E00C3	2 bytes	Misc.	Game Over screen: Current option selected ($00 = yes, $02 = no)
$7E00C5	2 bytes	Misc.	Game Over screen: Rotational velocity of letters (both X and Y axes)
$7E00C8	2 bytes	Timer	Game Over screen: Frame timer (counts down) of waiting before letter rotation restarts
$7E00CA	2 bytes	Timer	Game Over screen: Frame timer (counts up until $0200) for how long to wait until options appear
$7E00CC	53 bytes	Empty	Unused RAM, cleared (with $00) during every loading screen
$7E0100	1 byte	Empty	This area never gets initialized or emptied.
$7E0101	15 bytes	ASM	Interrupt jumps: NMI jumps to $7E0108, IRQ to $7E010C Copy of $008140-$00814E
$7E0111	7 bytes	Empty	This area never gets initialized or emptied.
$7E0118	2 bytes	Misc.	Game Mode. You can find the list of valid values here.
$7E011B	1 byte	Misc.	Full Game Mode completion flag $00: Game Mode still running (set by NMI/IRQ) $FF: Game Mode complete (set by end of game loop)
$7E011C	1 byte	Misc.	NMI & IRQ Mode $00: Nintendo Logo $02: Normal Level Mode $04: Offset-per-tile Level Modes (1-7/6-4) $06: Island Scenes $08: Story Cutscene / Credits $0A: Mode 7 bosses (Hookbill/Raphael) $0C: World Map $0E: Bonus & Bandit Games
$7E011D	2 bytes	Misc.	Mirror of hardware register $210D (BG1 Horizontal Scroll); since this register is write-twice, this is the full 16-bit mirror, it will write $7E011D and then $7E011E
$7E011F	2 bytes	Coordinate	Mirror of hardware register $210E (BG1 Vertical Scroll); since this register is write-twice, this is the full 16-bit mirror, it will write $7E011F and then $7E0120
$7E0121	1 byte	Misc.	Flag for level loading with stage intro text ($02 if true)
$7E0125	1 byte	Misc.	IRQ Counter Expected values are 0 to 2
$7E0126	1 byte	ASM	Main IRQ Mode $00: Default $02: Story Cutscene $04: Credits $06: Bonus/Bandit Games
$7E012D	1 byte	Super FX	SCBR (register $3038) mirror, used by GSU init
$7E012E	1 byte	Super FX	SCMR (register $303A) mirror, used by GSU init
$7E012F	1 byte	Debug	(Used by debug routine at $0080F8) Frame advance flag: #$00 = disable frame advance, #$01 = enable frame advance
$7E0130	1 byte	Debug	(Used by debug routine at $0080F8) Frame advance timer: When L or R is pressed on Controller 2 and frame advance flag at $012F is set, skips game mode code and decrements once per frame until it reaches 0, then next frame runs game mode code for one frame. Cleared when frame advance flag is set and neither L nor R is pressed on Controller 2.
$7E0131	2 bytes	Timer	Island: Frame counter
$7E0134	2 bytes	Level Data	Level header: Background color
$7E0136	2 bytes	Level Data	Level header: BG1 Tileset
$7E0138	2 bytes	Level Data	Level header: BG1 Palette
$7E013A	2 bytes	Level Data	Level header: BG2 Tileset
$7E013C	2 bytes	Level Data	Level header: BG2 Palette
$7E013E	2 bytes	Level Data	Level header: BG3 Tileset
$7E0140	2 bytes	Level Data	Level header: BG3 Palette
$7E0142	2 bytes	Level Data	Level header: Sprite Tileset
$7E0144	2 bytes	Level Data	Level header: Sprite Palette
$7E0146	2 bytes	Level Data	Level header: Level Mode
$7E0148	2 bytes	Level Data	Level header: Animation Tileset
$7E014A	2 bytes	Level Data	Level header: Animation Palette
$7E014C	2 bytes	Level Data	Level header: Background Scrolling
$7E014E	2 bytes	Level Data	Level header: Music
$7E0150	2 bytes	Level Data	Level header: Item Memory
$7E0152	2 bytes	Level Data	Level header: Unused
$7E015F	161 bytes	ASM	Reserved area for stack. This area never gets initialized or emptied (even upon reset / power on).
$7E0200	1 byte	Misc.	Screen brightness: s000bbbb s = black if set b = brightness
$7E0201	1 byte	Misc.	Fade in/out mode $01 = fade out $00 = fade in
$7E0203	2 bytes	Misc.	Mirror of music level header + 1 Used as index for SPC block uploads
$7E0207	4 bytes	Music	SPC block indices that are currently loaded in ARAM
$7E0212	1 byte	Bonus Challenge	Bonus game ID: $00: FLIP CARDS $02: SCRATCH AND MATCH $04: DRAWING LOTS $06: MATCH CARDS $08: ROULETTE $0A: SLOT MACHINE
$7E0216	2 bytes	Cutscene	Flag: Final world unlocked
$7E0218	2 bytes	Misc.	Current world number (0000 = world 1, 0002 = world 2, etc.) NOTE: 000C isn't a world, but it's used in the final cinema sequence
$7E021A	2 bytes	Level Number	Current level number, NOTE: not translevel #, just the first level # loaded in from map
$7E0222	72 bytes	Map	Available tiles on map screen, one byte per level tile: $00: unavailable $01: beaten $80: current (grayed out)
$7E026A	78 bytes	Empty	Unused RAM, cleared (with $00) via DMA during reset as well as before and after Nintendo logo
$7E02B8	72 bytes	Map	Current level high scores to be displayed on world map (one byte per level tile)
$7E030E	1 byte	Misc.	Current save file loaded: $00: file 1 $02: file 2 $04: file 3
$7E030F	72 bytes	Map	Map screen tile graphics, 1-byte indices (local to current world loaded)
$7E0357	27 bytes	Pause Screen	Items in pause menu, one byte per ID: $00: free slot $01: +10 star $02: +20 star $03: POW $04: full egg $05: magnifying glass $06: star cloud $07: green melon $08: blue melon $09: red melon
$7E0372	2 bytes	Misc.	Tutorial message bitflags for 1-1 & 1-2: bfm00000 00000000, b=first loss of Baby Mario in 1-1, f=first Flower received in 1-1, m=first Middle Ring in 1-2
$7E0379	2 bytes	Misc.	Current number of lives, 999 maximum
$7E037B	2 bytes	Misc.	Current number of coins
$7E037D	2 bytes	Misc.	Number of deaths in the current level (not translevel), 999 maximum
$7E037F	2 bytes	Misc.	Number of 1up's collected in the current level (not translevel), 999 maximum
$7E0383	2 bytes	Sprite Palette	Current Yoshi color, set on level select (goal Yoshi reads this as well): $0000: Green $0001: Pink $0002: Yellow $0003: Light Blue $0004: Purple $0005: Brown $0006: Red $0007: Dark Blue
$7E0385	2 bytes	Bonus Challenge	Flag for bonus challenge for end of level. $0001 for no bonus. $FFFF for bonus.
$7E038C	2 bytes	Misc.	Flag: warp to a different screen rather than start of stage
$7E038E	2 bytes	Misc.	Current screen exit (index into screen exit data)
$7E0394	2 bytes	Timer	Counter between ticks for star increase when stars are under 10
$7E0396	2 bytes	Misc.	Star count (*10) remaining to be auto-increased by (used by middle ring & items)
$7E0398	1 byte	Pause Screen	Item currently being used; same item indices as $7E0357
$7E039A	2 bytes	Pause Screen	Pause Item in continuous use. Set by items such as star counter and egg fill to act as a pause until item finished use. Cleared on item use.
$7E039C	1 byte	Timer	Frame counter during item use (after unpause)
$7E03A1	2 bytes	Misc.	first digit of star counter
$7E03A3	2 bytes	Misc.	second digit of star counter
$7E03A9	2 bytes	Timer	Frame counter for game modes $0D, $0E (during black cover sliding out), $0F, $10 (inside level, not score screen), and $11. Is paused during pause screen, and is reset upon entering stage and also upon star auto-increase (middle rings & +10 & +20 items).
$7E03AB	1 byte	Misc.	Flag: Star counter is below 9 (beeping/alarm sounds begin)
$7E03AC	2 bytes	Misc.	Flag: At least one middle ring has been used in current level (value will be number of middle rings used)
$7E03AE	2 bytes	Misc.	Flag: Boss has been visited before in current level, used to skip Kamek dialogue
$7E03B0	2 bytes	Misc.	Flag: Baby Bowser boss has been visited before in current level, used to skip Kamek introduction
$7E03B4	2 bytes	Misc.	Current number of red coins collected
$7E03B6	2 bytes	Misc.	Current star count * 10
$7E03B8	2 bytes	Misc.	Current number of flowers collected
$7E03BE	2 bytes	Level Data	Current Item Memory page (0-3)
$7E03C0	128 bytes	Level Data	Item Memory Page 0: Vertical bitplane, each word represents a horizontal line (0 = not collected, 1 = collected)
$7E0440	128 bytes	Level Data	Item Memory Page 1: Vertical bitplane, each word represents a horizontal line (0 = not collected, 1 = collected)
$7E04C0	128 bytes	Level Data	Item Memory Page 2: Vertical bitplane, each word represents a horizontal line (0 = not collected, 1 = collected)
$7E0540	128 bytes	Level Data	Item Memory Page 3: Vertical bitplane, each word represents a horizontal line (0 = not collected, 1 = collected)
$7E05C0	2 bytes	Player Physics	Current index into Yoshi delay buffers
$7E05C2	296 bytes	Player Physics	Yoshi X Coordinate delay buffer (2 bytes each): last 148 frames of where Yoshi's X was, used by egg inventory items to follow Yoshi
$7E06EA	296 bytes	Player Physics	Yoshi Y Coordinate delay buffer (2 bytes each): last 148 frames of where Yoshi's Y was, used by egg inventory items to follow Yoshi
$7E093C	1 byte	Controller	Controller 1 Data 1 (global): AXLR---- A = A; X = X; L = L; R = R
$7E093D	1 byte	Controller	Controller 1 Data 2 (global): byetUDLR b = B; y = Y; e = Select; t = Start; U = up; D = down; L = left, R = right
$7E093E	1 byte	Controller	Controller 1 Data 1, on press/first frame (global): AXLR---- A = A; X = X; L = L; R = R
$7E093F	1 byte	Controller	Controller 1 Data 2, on press/first frame (global): byetUDLR b = B; y = Y; e = Select; t = Start; U = up; D = down; L = left, R = right
$7E0940	1 byte	Controller	Controller 2 Data 1 (global): AXLR---- A = A; X = X; L = L; R = R
$7E0941	1 byte	Controller	Controller 2 Data 2 (global): byetUDLR b = B; y = Y; e = Select; t = Start; U = up; D = down; L = left, R = right
$7E0942	1 byte	Controller	Controller 2 Data 1, on press/first frame (global): AXLR---- A = A; X = X; L = L; R = R
$7E0943	1 byte	Controller	Controller 2 Data 2, on press/first frame (global): byetUDLR b = B; y = Y; e = Select; t = Start; U = up; D = down; L = left, R = right
$7E0944	1 byte	Controller	Previous frame controller 1 data 1 (what was previously in $7E093C), used for next frame's on press
$7E0945	1 byte	Controller	Previous frame controller 1 data 2 (what was previously in $7E093D), used for next frame's on press
$7E0946	1 byte	Controller	Previous frame controller 2 data 1 (what was previously in $7E0940), used for next frame's on press
$7E0947	1 byte	Controller	Previous frame controller 2 data 2 (what was previously in $7E0941), used for next frame's on press
$7E0948	2 bytes	Misc.	Word that stores each color channel's fixed color data intensity (mirror of $2132 for each channel): 0bbbbbgg gggrrrrr b = blue channel intensity g = green channel intensity r = red channel intensity
$7E094A	1 byte	Misc.	Mirror of hardware register $420C
$7E094B	1 byte	Misc.	Mirror of hardware register $2101
$7E094C	1 byte	Misc.	Mirror of hardware register $212A
$7E094D	1 byte	Misc.	Mirror of hardware register $212B
$7E094E	1 byte	Misc.	Mirror of hardware register M7SEL ($211A)
$7E094F	2 bytes	Misc.	Mirror of hardware register M7A ($211B)
$7E0951	2 bytes	Misc.	Mirror of hardware register M7B ($211C)
$7E0953	2 bytes	Misc.	Mirror of hardware register M7C ($211D)
$7E0955	2 bytes	Misc.	Mirror of hardware register M7D ($211E)
$7E0957	2 bytes	Misc.	Mirror of hardware register M7X ($211F)
$7E0959	2 bytes	Misc.	Mirror of hardware register M7Y ($2120)
$7E095B	1 byte	Misc.	Mirror of hardware register $2106
$7E095E	1 byte	Misc.	Mirror of hardware register $2105
$7E095F	1 byte	Misc.	Mirror of hardware register $2107
$7E0960	1 byte	Misc.	Mirror of hardware register $2108
$7E0961	1 byte	Misc.	Mirror of hardware register $2109
$7E0962	1 byte	Misc.	Mirror of hardware register $210B
$7E0963	1 byte	Misc.	Mirror of hardware register $210C
$7E0964	1 byte	Misc.	Mirror of hardware register $2123
$7E0965	1 byte	Misc.	Mirror of hardware register $2124
$7E0966	1 byte	Misc.	Mirror of hardware register $2125
$7E0967	1 byte	Misc.	Mirror of hardware register $212C
$7E0968	1 byte	Misc.	Mirror of hardware register $212D
$7E0969	1 byte	Misc.	Mirror of hardware register $212E
$7E096A	1 byte	Misc.	Mirror of hardware register $212F
$7E096B	1 byte	Misc.	Mirror of hardware register $2130
$7E096C	1 byte	Misc.	Mirror of hardware register $2131
$7E0980	1 byte	Timer	Timer for updating Title Screen animation frames (title wavy effect, island rotating, sprite moving, etc). Each animation frame takes 4 frames to update.
$7E0B0F	1 byte	Pause Screen	Pause state: $00: unpaused $01-12: pause transition states $13: in pause menu $14: begin unpausing
$7E0B10	1 byte	Pause Screen	Flag for pause screen active - instantly turns on when pause pressed, instantly turns off when unpause pressed
$7E0B48	2 bytes	Pause Screen	Flag that indicates whether or not menu items are disabled.
$7E0B4C	2 bytes	Misc.	Screen X position of black curtain during player death scene; when it reaches $0400, it resets to $0000 and the Retry screen appears
$7E0B55	2 bytes	Timer	Mosaic Timer, and one of the many "game frozen" flags: gets set to $10 when touching a fuzzy and counts down once per frame. Controls the mosaic effect (mirrors $7E095B)
$7E0B67	2 bytes	Timer	Tileset Animation Timer Different usage per mode
$7E0B7D	2 bytes	Timer	Idle frame counter; on >= $60 star counter is displayed
$7E0B7F	2 bytes	Misc.	Frame counter for how long to display the star counter (right after counter changes)
$7E0B81	1 byte	Misc.	Star counter position: $00 = left side, $01 = right side
$7E0B91	96 bytes	Sprite Number	24 2-word entries, one sprite per: Word 1: Sprite ID for sprite to turn into when sprite state is $0006 Word 2: Unused Special Case: Goal Ring uses Word 1 and 2 as a timer
$7E0C04	8 bytes	Sprite Number	Table of all current special sprites' ID's, 4 word-sized entries. $0000 is used as "none"; anything else is assumed to be an ID. Special sprite ID is a relative ID computed by: (sprite ID) - $01B9
$7E0C1C	2 bytes	Misc.	Current autoscroll special sprite ID, 0 means no autoscroll active
$7E0C1E	2 bytes	Misc.	Flag: Autoscrolling currently active for camera X
$7E0C20	2 bytes	Misc.	Flag: Autoscrolling currently active for camera Y (1-E and 6-8 flag this off)
$7E0C22	4 bytes	Misc.	Current autoscroll camera X value
$7E0C26	4 bytes	Misc.	Current autoscroll camera Y value
$7E0C2A	2 bytes	Misc.	Current autoscroll X velocity
$7E0C2C	2 bytes	Misc.	Current autoscroll Y velocity
$7E0C2E	2 bytes	Misc.	Current autoscroll checkpoint (index into autoscroller_values table)
$7E0C30	2 bytes	Misc.	Next autoscroll checkpoint X value
$7E0C32	2 bytes	Misc.	Next autoscroll checkpoint Y value
$7E0C34	2 bytes	Misc.	Next autoscroll checkpoint speed value
$7E0C36	2 bytes	Misc.	Autoscroll: next checkpoint X - current camera X (how much is left to go)
$7E0C38	2 bytes	Misc.	Autoscroll: next checkpoint Y - current camera Y (how much is left to go)
$7E0C3A	2 bytes	Misc.	Flag: Currently active gusty generation
$7E0C3C	2 bytes	Misc.	Flag: Currently active Lakitu (at least 1)
$7E0C3E	2 bytes	Misc.	Flag: Currently active fuzzy generation
$7E0C44	2 bytes	Misc.	Previous camera X value used by fuzzy generator
$7E0C46	2 bytes	Misc.	Flag: Currently active Poochy
$7E0C48	2 bytes	Misc.	Flag: Currently active bat generation
$7E0C4A	2 bytes	Misc.	Current generated bat count
$7E0C4C	2 bytes	Misc.	Flag: Currently active unknown special sprite
$7E0C68	2 bytes	Misc.	Flag: Currently active Fire Lakitu (at least 1)
$7E0C6A	2 bytes	Misc.	Flag: Currently active Flutter generation
$7E0C6E	2 bytes	Misc.	Flag: Currently active Nipper Spore generation
$7E0C70	2 bytes	Misc.	Flag: Currently active balloon with pokey ball generation
$7E0C72	2 bytes	Misc.	Flag: Currently active balloon with missile generation
$7E0C74	2 bytes	Misc.	Flag: Currently active balloon generation
$7E0C76	2 bytes	Misc.	Flag: Currently active yellow platform generation
$7E0C78	2 bytes	Misc.	Flag: Currently active Slime Drop generation
$7E0C7C	2 bytes	Misc.	Flag: Currently active unknown special sprite 3
$7E0C7E	2 bytes	Misc.	Flag: Currently active unknown special sprite 4
$7E0C80	2 bytes	Player Physics	Tongue X position, relative to Yoshi
$7E0C82	2 bytes	Player Physics	Tongue Y position, relative to Yoshi
$7E0C98	24 bytes	Sprite Number	Sprite table, 24 entries, one byte per: A copy of all sprites' states during camera events. Used as flags to not despawn sprites during camera events (like stairs)
$7E0CB0	2 bytes	Misc.	Camera Y offset from shaking (either large or small)
$7E0CB2	2 bytes	Misc.	Falling wall is on-screen flag. Because the game puts two walls five spaces apart (one for the left and another for the right side), this one prevents the game from having two walls being occupied in the same spot. In addition, they use HDMA to draw their graphics and so two separate walls can't co-exist at the same time due to this reason.
$7E0CCC	2 bytes	Timer	Damage recoil timer, disables left and right if not zero.
$7E0CEC	2 bytes	Timer	! switch timer, starts off at $0280, counts down
$7E0CFD	2 bytes	Misc.	Timer for offset-by-tile level modes Controls for example moving platforms in 6-4
$7E0CFF	2 bytes	Misc.	Amplitude of fuzzy offset-per-tile sinewave
$7E0D01	2 bytes	Misc.	Positional offset of fuzzy offset-per-tile sinewave
$7E0D03	2 bytes	Timer	Current time value for fuzzy palette morphing effect
$7E0D05	1 byte	Boss	Raphael Boss fight rotation value $00 to $FF (whole loop)
$7E0D09	2 bytes	Misc.	Background gradient Y scroll, lower part
$7E0D0B	2 bytes	Misc.	Background gradient Y scroll, upper part
$7E0D0F	1 byte	Misc.	Message box state: $00: no message box $01: init $03: black box growing (opening) $05: init message $07: message fading in (from black) $09: opened, player reading $0B: message fading out (to black) $0D: black box shrinking (closing)
$7E0D19	2 bytes	Misc.	Message Box: size of transitional black square as it grows
$7E0D21	6 bytes	Misc.	During stage clear transition/wipe, rectangle mask's screen coordinates: Word 1: left X (low byte), right X (high byte); Word 2: top Y Word 3: bottom Y
$7E0D37	2 bytes	Misc.	Background wave effect (fuzzy): amplitude of horizontal wave
$7E0D39	2 bytes	Misc.	Background wave effect (fuzzy): amplitude of vertical wave
$7E0DAE	2 bytes	Timer	Frame counter for holding up while on ground, used for Baby Mario's animation frame, increments by 2 when holding but then on release decays by halving each frame
$7E0DB0	2 bytes	Timer	Frame counter for holding down while on ground, used for Baby Mario's animation frame, increments by 2 when holding but then on release decays by halving each frame
$7E0DF9	2 bytes	Misc.	Amount of wooden planks (sprites 0x5E and 0x5F) running.
$7E0E2F	1 byte	Misc.	4 Red Toadies: counter of how many have grabbed Baby Mario
$7E0E31	1 byte	Misc.	4 Red Toadies: counter of how many are currently active/spawned
$7E0E33	1 byte	Misc.	4 Red Toadies: Currently active (at least one)
$7E0E37	16 bytes	Coordinate	4 Red Toadies: Each Toadie's X positions (4 total) relative to the 4 Toadies base sprite, one toadie per entry: Byte 1: Subpixel Byte 2: Position Byte 3: Screen # Byte 4: Spillage from carry add for screen
$7E0E49	16 bytes	Coordinate	4 Red Toadies: Each Toadie's Y positions (4 total) relative to the 4 Toadies base sprite, one toadie per entry: Byte 1: Subpixel Byte 2: Position Byte 3: Screen # Byte 4: Spillage from carry add for screen
$7E0FBD	2 bytes	Timer	Mirror of $701974 (frame counter) only when Green spiked platform (sprites $15F) is active.
$7E0FBF	2 bytes	Timer	Mirror of $701974 (frame counter) only when Red spiked platform (sprite $160) is active.
$7E105C	1 byte	Boss	Raphael the Raven: Y coordinate (relative to moon surface)
$7E105D	1 byte	Boss	Raphael the Raven: X coordinate (relative to wrapping around moon)
$7E105E	2 bytes	Boss	Bigger Boo: scale Raphael the Raven $7E105E: how far Yoshi is from Raphael (X coordinate around moon) Raphael the Raven $7E105F: current AI state ($00 - $14)
$7E1060	1 byte	Timer	Raphael the Raven: timer value - used to control timings of AI events. Decrements each frame, gets reset to either random values or specific values on state changes.
$7E1062	1 byte	Boss	Raphael the Raven: Facing - $00 for counterclockwise, $02 for clockwise; Baby Bowser: hit counter, fight ends when the low byte reaches $03 (or any value from $03 to $82).
$7E1066	1 byte	Boss	Bigger Boo: flag for taking damage (growing)
$7E1068	2 bytes	Boss	Big Bowser: Z coordinate (depth)
$7E106C	2 bytes	Boss	Big Bowser: horizontal position. Raphael the Raven: Y velocity
$7E1070	2 bytes	Boss	Big Bowser: index for summoning boulders, increments by 2 each boulder, ending in $0008 in the first summon and $000E in the second.
$7E1074	2 bytes	Boss	Big Bowser: flag indicating he is being hit by an egg right now, instantly clears
$7E1076	2 bytes	Boss	Hookbill: graphics scaling value (X axis) Bowser: damage counter, fight ends at $0007
$7E1078	2 bytes	Boss	Hookbill: graphics scaling value (Y axis)
$7E1082	2 bytes	Boss	Naval Piranha: health, starts with #$0003, dies on #$0000
$7E10DA	2 bytes	Player Physics	Debug flag for free Yoshi movement
$7E1109	1 byte	Coordinate	World Map: Cursor X-position
$7E110A	1 byte	Coordinate	World Map: Cursor Y-position
$7E110C	1 byte	Coordinate	World Map: Cursor next X-position to be reached
$7E110D	1 byte	Coordinate	World Map: Cursor next Y-position to be reached
$7E1112	1 byte	Level Number	World Map: current level/option slot. Sets the level index ($7E021A) if you select one.
$7E1117	1 byte	Map	World Map: Current World selected * 2. Sets the world number ($7E0218).
$7E1125	2 bytes	Map	Current Yoshi formation in world map. Values follow world number ($7E0218) format.
$7E112E	2 bytes	Map	World Map: Current Yoshi selected (which one Baby Mario is mounted), changes when you move between normal levels, not special, bonus, nor options.
$7E11B6	2 bytes	Timer	Beginning story cutscene: Number of frames left (counts down) to display current text before fading out
$7E11B8	2 bytes	Misc.	Beginning story cutscene state: $01 = load next text (into fade in) $02 = fade in text $03 = display text (normal) $04 = load next text (into scroll) $05 = scroll down to next text part $06 = fade out text
$7E11BA	2 bytes	Misc.	Beginning story cutscene: Current text (index by 2's into $0FCD56)
$7E11BC	2 bytes	Misc.	Beginning story cutscene: BG4 tilemap VRAM destination (for DMA of text)
$7E11BE	576 bytes	Layer 4 Tilemap	Beginning story cutscene: All possible BG4 tilemap data (text), split into 64-byte chunks which are loaded into VRAM as new text comes in
$7E13FE	1 byte	Misc.	Beginning story cutscene: Current Y scroll destination (index by 2's into $0FCE90)
$7E1404	1 byte	Misc.	Beginning story cutscene: Frame timing for current scene/text shown (index into cutscene timer table $0FCEDB)
$7E1405	2 bytes	Timer	Frame timer (counts down) for beginning story cutscene and rotating island; upon 0, it will fade into the other one (endlessly switching until you load file select menu)
$7E1409	1488 bytes	Empty	Unused RAM, cleared (with $00) via DMA during reset as well as before and after Nintendo logo NOTE: There's a bug in level loading of Burts Boss room (only room?) where it will do an unintentional read of $7E15A5 (word sized) and use it as a tile. But it's never written to.
$7E1E00	832 bytes	Empty	Unused RAM, cleared (with $00) via DMA during reset as well as before and after Nintendo logo
$7E2340	7360 bytes	Empty	Unused RAM, cleared (with $00) via DMA during reset as well as before and after Nintendo logo
$7E4000	2 bytes	Misc. Tilemap	Bytes until next free entry in tilemap DMA queue
$7E4002	2046 bytes	Misc. Tilemap	Reserved area for VRAM tilemap DMA queue, processed every frame, split into variable-sized entries, let e = one entry: e[0:1]: xvvv vvvv vvvv vvvv x = End of queue marker v = VRAM destination/source address e[2:3]: vidt tttt tttt tttt t = transfer size - 1 (can also act as entry size) v = column transfer (32 byte increase if set, otherwise 1) i = Does a fixed transfer if set (init data) d = Direction, does a read of VRAM if set (otherwise write) if d == 1 (Read Tilemap): Read from VRAM address and write to destination e[4:6]: Long Destination address to write to if d == 0 and i == 0 (Write Tilemap): Write to VRAM address using data from entry e[4:t]: Data to DMA, size same as t if d == 0 and i == 1 (Init Tilemap): Write to VRAM address floodfill using data from entry e[4:5]: Word data to repeat t times (Queue size doesn't go beyond 182 bytes in vanilla game so roughly 1864 bytes of this are "free")
$7E4800	2 bytes	Pointer	Address of last entry in general-purpose DMA queue
$7E4802	2110 bytes	Misc.	Reserved area for general-purpose DMA queue, split into 12-byte entries, let e = one entry: e[0:1]: VRAM destination address e[2]: video port control e[3]: DMA control e[4]: DMA destination register e[5:7]: long source address e[8:9]: DMA size e[A:B]: address of next entry in queue (Doesn't go beyond $4999 in vanilla gameplay, so roughly 1700 bytes of this are "free")
$7E5040	420 bytes	Misc.	HDMA Table for BG3 Vertical scroll (register $2112), OR when OPT is enabled, writes to BG2 Horizontal scroll (register $210F) instead: 1 word entries from top of actual screen to bottom (minus black bars), representing each scanline
$7E51E4	420 bytes	Misc.	HDMA Table for BG3 Horizontal scroll (register $2111), OR when OPT is enabled, writes to BG2 Vertical scroll (register $2110) instead: 1 word entries from top of actual screen to bottom (minus black bars), representing each scanline
$7E56D0	840 bytes	Misc.	HDMA Table for Window 1 & 2 ($2126-$2129) 4 bytes per entry, from top of actual screen to bottom (minus black bars), representing each scanline: Byte 1: Window 1 Left Position Byte 2: Window 1 Right Position Byte 3: Window 2 Left Position Byte 4: Window 2 Right Position
$7E5A18	128 bytes	Misc.	HDMA Indirect Table 0, native SNES HDMA Indirect format, 3-byte entries: Byte: rccccccc r = repeat, c = scanline count Word: Source pointer
$7E5A98	128 bytes	Misc.	HDMA Indirect Table 1 (format)
$7E5B18	128 bytes	Misc.	HDMA Indirect Table 2 (format)
$7E5B98	128 bytes	Misc.	HDMA Indirect Table 3 (format) Default for Channel 4 (BG3 V-scroll (BG2 for OPT))
$7E5C18	128 bytes	Misc.	HDMA Indirect Table 4 (format) Commonly used for Channel 3 (BG3 H-scroll (BG2 for OPT))
$7E5C98	128 bytes	Misc.	HDMA Indirect Table 5 (format) Commonly used for Channel 2 (green & red channel of background gradient)
$7E5D18	128 bytes	Misc.	HDMA Indirect Table 6 (format) Commonly used for Channel 1 (blue channel of background gradient)
$7E5D98	2 bytes	Misc.	Number of bytes Yoshi's in-between level egg inventory items take up (# of items * 2)
$7E5D9A	12 bytes	Misc.	Egg inventory items stored in between levels (not current eggs), 6 words, each one is a sprite ID
$7E5DA6	2048 bytes	Misc.	Cross sections: Full copy of cross section BG3 tile graphics, set only once upon loading cross section levels and then every frame stored to $706800 Chomp Shark: BG3 tilemap animations
$7E65A6	2048 bytes	Layer 1 Tilemap	BG1 left tilemap mirror used for cross section graphical masking effect (free RAM if not using cross section BG3 header $0A)
$7E6DA6	1024 bytes	Layer 1 Tilemap	BG1 right tilemap mirror used for cross section graphical masking effect (free RAM if not using cross section BG3 header $0A)
$7E71A6	1024 bytes	Layer 1 Tilemap	Overlap between $7E6DA6 and $7E75A6, both tilemaps are actually 2048 bytes and this acts as either one depending on when (free RAM if not using cross section BG3 header $0A)
$7E75A6	1024 bytes	Layer 3 Tilemap	BG3 tilemap mirror (VRAM $3400) used for cross sections (free RAM if not using cross section BG3 header $0A)
$7EB8E2	1822 bytes	Empty	Unused RAM, cleared (with $00) via DMA during reset as well as before and after Nintendo logo
$7EC000	16384 bytes	ASM	Copy of $00C000-$00FFFF (Code is never executed with the data bank as $00 for this range; it's always $7E)
$7F0000	22238 bytes	Empty	Unused RAM, cleared (with $00) via DMA during reset as well as before and after Nintendo logo
$7F56DE	438 bytes	Object Palette	Blue channel of background gradient ($2132 COLDATA) Covers entire sublevel (NOT just screen) from top to bottom, one byte per entry, representing every eighth X pixel row in sublevel
$7F5894	876 bytes	Object Palette	Green & Red channel of background gradient ($2132 COLDATA) Covers entire sublevel (NOT just screen) from top to bottom, two bytes per entry, representing every eighth X pixel row in sublevel: Byte 1: Green Channel Byte 2: Red channel
$7F7E00	512 bytes	Level Data	All screen exit data for current level, in screen region order ($00-$7F), 4 bytes per exit: LLLLLLLL XXXXXXXX YYYYYYYY EEEEEEEE L = Destination Level (between 00 and DD) X = Destination X-Coordinate Y = Destination Y-Coordinate E = Destination Entrance Type (this follows the same format as $7000AC, Yoshi state)
$7F8000	32768 bytes	Layer 1 Tilemap	Table that holds all foreground MAP16 tile data for the entire sublevel currently loaded. Split up by screen ID's then further into row-major tile #. Data is word-sized MAP16 indices.

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