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YI Memory Map

Displaying 100 out of 305 addresses.

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RAM Address Length Type Description Details
$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