|
$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 |
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