Super Mario Bros./RAM map

The following article is a RAM map for Super Mario Bros..

This data is relevant to Super Mario Bros. (JU) (PRG0) [!] and may not be correct for other dumps. Most (but not all?) of these addresses apply to the Japanese version of Lost Levels, otherwise known as Super Mario Bros. 2 [Japanese].

Table

RAM	Information
0x0000	Temp/various uses. Is used in vertical physics for gravity acceleration (value copied from 0x0709).
0x0001	Player's animation
0x0002	Temp/various. Something to do with player y (but it skips to 0 every x frames, even when you dont move)
0x0003	Player's direction (and others). 1 - Right 2 - Left
0x0004	How much to load
0x0005	Something to do with player x (same as 0x0002)
0x0008	Object Offset.
0x0009	Frame Counter. Count number of Frames.
0x000A	Button state AB (flags) 0x00 - No Button 0x40 - A 0x80 - B 0xC0 - Both
0x000B	Vertical direction input state (flags); 0x00 - No Button 0x40 - Down 0x80 - Up 0xC0 - Both
0x000E	Player's state 0x00 - Leftmost of screen 0x01 - Climbing vine 0x02 - Entering reversed-L pipe 0x03 - Going down a pipe 0x04 - Autowalk 0x05 - Autowalk 0x06 - Player dies 0x07 - Entering area 0x08 - Normal 0x09 - Transforming from Small to Large (cannot move) 0x0A - Transforming from Large to Small (cannot move) 0x0B - Dying 0x0C - Transforming to Fire Mario (cannot move)
0x000F-0x0013	Enemy drawn? Max 5 enemies at once. 0 - No 1 - Yes (not so much drawn as "active" or something)
0x0014	Powerup drawn? (Corresponds with hitbox at 0x04C4). If a powerup is on screen and a second one would appear, the first one disappears (completely). You can see this in 1.1, get the star and open the powerup at the top. Hitbox is shared. 0 - No 1 - Yes
0x0016/A	Enemy type (5x). 0x00 - Green Koopa 0x01 - Red Koopa 0x02 - Buzzy beetle 0x03 - Red Koopa 0x04 - Green Koopa 0x05 - Hammer brother 0x06 - Goomba 0x07 - Blooper 0x08 - BulletBill FrenzyVar 0x09 - Green Koopa paratroopa 0x0A - Grey CheepCheep 0x0B - Red CheepCheep 0x0C - Pobodoo 0x0D - Piranha Plant 0x0E - Green Paratroopa Jump 0x0F - Crashes game(status bar margin) 0x10 - Bowser's flame 0x11 - Lakitu 0x12 - Spiny Egg 0x13 - Nothing 0x14 - Fly CheepCheep 0x15 - Bowser's Flame 0x16 - Fireworks 0x17 - BulletBill Frenzy 0x18 - Stop Frenzy 0x19 - ? 0x20/0x21/0x22 - Firebar 0x21 - Long Firebar (castle) AND sets previous enemy slot to 0x20 or else only half of the line shows 0x23 - ? 0x24/0x25 - Static lift 0x26/0x27 - Vertical going lift 0x28 - Horizontal going lift 0x29 - Static lift (Will Fall if Player stays on it for too long) 0x2A - Horizontal forward moving lift with strange hitbox 0x2B/0x2C - Halves of double lift (like 1.2) 0x2D - Bowser (special), will try to set previous addr to 2D as well, if unable only his ass shows :) He also tries to reach a certain height, if not there already, before starting his routine. 0x2E - PowerUp Object 0x2F - Vine Object 0x30 - Flagpole Flag Object 0x31 - StarFlag Object 0x32 - Jump spring Object 0x33 - BulletBill CannonVar 0x34 - Warpzone 0x35 - Retainer Object 0x36 - Crash 0x37 - 2 Little Goomba. 0x38 - 3 Little Goomba. 0x3A - Skewed goomba. 0x3B - 2 Koopa Troopa. 0x3C - 3 Koopa Troopa.
0x001B	Powerup on screen 0x00 - No 0x2E - Yes
0x001D	Player "float" state 0x00 - Standing on solid/else 0x01 - Airborn by jumping 0x02 - Airborn by walking of a ledge 0x03 - Sliding down flagpole
0x001E,0x0023	Enemy state? Haven't tested much. 0x00 - Does _not_ mean they don't exist 0x01 - falling_enemy or Bullet_Bill drawn(not killed yet). 0x04 - Enemy Stomped 0x20 - BulletBill / CheepCheep / hammer_bro stomped 0x22 - killed with fire or star 0x23 - bowser_killed 0xC4 - koopa stomped falling 0x84 - koopa or buzzyBeetle Stomped and moving; 0xFF - Will kill them off (like getting hit by a star)
0x0023	Powerup state/heading (there's probably another register to check) 0x02-0x06 - 'question block' hit sequence 0x07-0x11 - Powerup emerging sequence 0xC0 - When shroom airborn going right 0xC2 - When shroom airborn going left 0x80 - When powerup moving right (or not moving at all) 0x82 - When powerup moving left
0x0024/5	Fireball drawn (corresponds with hitbox coordinates 0x04C8/C) when not 0
0x002A-0x0032	Hammers (correspond with last 9 hitbox coordaintes, 0x04D0-0x04F3), when not 0
0x0030/2	Coins (corresponds with last three coordinates, 0x04E0, 0x04EC, 0x04F0), when not 0
0x0033	Player facing Direction. 0 - Not on screen 1 - Right 2 - Left
0x0039	Powerup type (when on screen) 0 - Mushroom 1 - Flower 2 - Star 3 - 1up
0x0045	Player Moving Direction. 1 - Right 2 - Left
0x0046/A	Enemy heading 1 - Right 2 - Left
0x004B	Shroom heading 1 - Right 2 - Left
0x0057	Player horizontal speed 0xD8<0 - Moving left 0x00 - Not moving 0<0x28 - Moving right
0x0058/C	Enemy vertical speed 0xD8<0 - Moving left 0x00 - Not moving 0<0x28 - Moving right
0x006D	Player horizontal position in level
0x006E-0x0072	Enemy horizontal position in level
0x0086	Player x position on screen
0x0087/B	Enemy x position on screen
0x008C	Powerup x position on screen
0x008D	Fireball X-Position.
0x00D5	Fireball Y-Position
0x008F-0x0091	Brick smash 1 y
0x0090/2	Brick smash 2 y
0x009F	Player vertical velocity in whole pixels (signed byte), see 0x0433 for fractional Upward: FB = normal jump Downward: 05 = fastest fall
0x00A0/4	Enemy vertical velocity Upward - 0xFB ~ 0xFF (FB = fastest) Downward - 0x01 ~ 0x04 (04 = fastest)
0x00A2/3	Timers for the fireballlines (castles). I guess their position can be determined from this. Runs 0-0x1F for one circle (slow?)
0x00B5	Player vertical screen position viewport = 1 above viewport = 0 anywhere below viewport is >1 (when falling down a pit this will increase up to 5)
0x00B6/A	Enemy vertical screen position (same as player) viewport = 1 above viewport = 0 anywhere below viewport is >1 (when falling down a pit this will increase up to 5)
0x00BB	Powerup vertical screen position (same as player) viewport = 1 above viewport = 0 anywhere below viewport is >1 (when falling down a pit this will increase up to 5)
0x00CE	Player y pos on screen (multiply with value at 0x00B5 to get level y pos)
0x00CF-0x00D3	Enemy y pos on screen (multiply with value at 0x00B6/A to get level y pos)
0x00D4	Powerup sprite y (multiply with value at 0x00BB to get level y pos)
0x00D79	Brick smash 1 x
0x00D8/A	Brick smash 2 x
0x00E4/6	Y of air bubbles when under water :p I think their x is equal to the player, not sure.
0x00A6	Fireball_Y_Speed
0x00A7	Fireball 2 y
0x00D6	Vertical 1 vert speed
0x00D7	Fireball 2 vert speed
0x00E7	Level layout address
0x00E9	Enemy layout address
0x00FA	"Pause" Effect Register
0x00FB	Area Music Register
0x00FC	Event Music Register
0x00FD	Sound Effect Register 1 (brick shatter, Bowser flame, others?)
0x00FE	Sound Effect Register 2 (coin collect, powerup/vine emerge, powering-up, 1-Up, bullet blase, Bowser's plummet, others)
0x00FF	Sound Effect Register 3 (jumping, bumping head, stomping, kicking, others)
0x0110/5	Score tiles (the floating numbers when you get points, this tells which number should be shown, it's a palette, surprise surprise...)
0x0117/B	Score x
0x011E-0x0122	Score y
0x03AD	Player x pos within current screen offset
0x03AE-0x03B2	Enemy x pos within current screen offset
0x03B3	Powerup x pos within current screen offset
0x03B8	Player y pos within current screen (vertical screens always offset at 0?)
0x03B9/D	Enemy y pos within current screen (vertical screens always offset at 0?)
0x03BE	Powerup y pos within current screen (vertical screens always offset at 0?)
0x03AF	Fireball Relative X-Position.
0x03BA	Fireball Relative Y-Position.
0x03C4	Player palette, cycles when you have a star (not when you become fiery though, even though that uses the exact same cycles)
0x0400	Player Object X-MoveForce.
0x0416	Player Object YMF_Dummy.
0x0417/B	Enemy YMF_Dummy.
0x0433	Player vertical fractional velocity. This is not accounted for when clamping to max fall velocity etc.
0x043A	Fireball stuff?
0x043B	Fireball stuff?
0x0450	Player max velocity to the left. Values taken from 0xE4: max walking vel 0xD8: max running vel (changes to this when pressing B+L)
0x0456	Player max velocity to the right 0x1C - max walking vel 0x30 - max running vel (changes to this when pressing B+R)
0x0490	Player Collision_Bits,if you collided with Any Block / Object / Brick , Then Value will change to 0xFE otherwise it will stay 0xFF.
0x0491	Enemy Collision_Bits, Value is set to 0x01 whenever player gets collided with enemy otherwise it stays 0x00.
0x04AC	Player hitbox (1x4 bytes, <<x1,y1> <x2,y2>>)
0x04B0	Enemy hitboxes (5x4 bytes, <<x1,y1> <x2,y2>>)
0x04C4	Powerup hitbox (1x4 bytes, <<x1,y1> <x2,y2>>)
0x04C8	(Fiery) fireball hitbox (2x4 bytes, <<x1,y1> <x2,y2>>)
0x04D0	Hammer hitbox (9x4 bytes, <<x1,y1> <x2,y2>>) (like from bowser, hammerbros)
0x04E0	Coin hitboxes (3x4 bytes, <<x1,y1> <x2,y2>>) (used for coins from questionmarks and when getting coins above bricks by hitting the brick)
0x0500-0x069F	Current tile (Does not effect graphics)
0x06CE	Fireball counter (increments as you fire). First bit probably used to toggle between hitbox indices
0x06D4	Cycle counter of gold coin in top of screen and image of questionmark blocks
0x06D5	PlayerGfx_Offset , Player sprite Mario state (didn't check them myself) 0xB8 - small stand [0x60, 0x70, 0x80] - small walk cycle 0xC8 - big stand 0x20 - big jump [0x00, 0x10, 0x20] - bigwalk cycle 0x50 - crouch
0x06D6	Warpzone Control. Game Checks value from here and decides which warpzone to load.
0x06D9	MultiLoop Correct Control.
0x06DE	ChangeArea Timer.
0x06FC	Player 1 input (regular flag pattern), select and start are reset after 1 frame. See 0x074A for more accurate input.
0x06FD	Player 2 input (regular flag pattern), select and start are reset after 1 frame. See 0x074B for more accurate input.
0x0700	Player X-Speed Absolute ,Player speed in _either_ direction (0 - 0x28)
0x0701	Friction Adder High ,Is breaking when 1 (freeze this and you immediately stand still when you stop moving)
0x0702	Walk animation (didn't check values) 0xE4 - is running 0x30 - skidding 98 - normal Also some other values when starting to run or when turning around
0x0704	Swimming Flag ,Set to 0 to swim
0x0705	Player X-MoveForce, runs when you press left or right
0x0709	Current gravity which will be applied to the player sprite (see 0x0000, 0x0433 and Notes page). Based on the current horizontal velocity, this takes on different values: 0x30 in a jump when still or walking slowly. 0x2D in a jump when walking at full speed. 0x38 in a jump when running at full speed. If player is falling, takes values from 0x070A.
0x070A	Current fall gravity (not sure how this is decided). This value is decided, then copied to 0x0709 IF Mario is falling (0x009F positive). Based on the current horizontal velocity, this takes on different values: 0xA8 for falling when still or walking slowly. 0x90 for falling when walking at full speed. 0xD0 for falling when running at full speed.
0x070B	When not 0, runs big-small animation (but does not affect anything internally)
0x070C	Player walk animation delay, in game frames (1/60 s). 0x05=slow walk, 0x03=full walk speed, 0x02=fastest/running speed
0x070D	Player walk animation current frame index (0,1,2,0,etc)
0x0712	Is DeathMusicLoaded? (boolean) Usually triggered for falling deaths.
0x0714	0x04 when ducking as big mario, 0 otherwise (also when ducking as small). Keeps being 4 when you slide of an edge while ducking (so does not affect image, but does when set to 4 and being small...). When this register is frozen, you can move like normal, you're just ducking while doing so.
0x071A	Current screen (in level)
0x071B	Next screen (in level)
0x071C	ScreenEdge X-Position, loads next screen when player past it?
0x071D	Player x position, moves screen position forward when this moves
0x071E	Column Sets . Counts back, done when this is FF. you can see the level being built in memory up as this counter progresses, one frame at a time.
0x071F	AreaParser TaskNumber, runs from 4 to 0.
0x0722	Player HitDetect Flag. Determines whether allow Player to Pass through from Bricks or not. (Settting it to 0xFF will cause Player to Penetrate through Walls/Bricks)
0x0723	Scroll Lock, 1 = Prevent screen from scrolling right, i.e. Bowser, warp zone, etc. 0 = Allow scroll.
0x072C	Current level layout index
0x072F	Last value of 0x072C
0x0733	Replaces trees and Mushroom platforms 0 - All Mushroom platforms replaced with trees 1 - All trees replaced with Mushroom platforms, overwrites first BG palette line 2 - All trees and Mushroom platforms replaced Bill Blasters 3 - All trees and Mushroom platforms removed 4 - All trees and Mushroom platforms removed, causes invisible floors and ceilings to appear 5+ - Crash
0x0739	Current enemy layout index
0x0743	When true, new groundtiles and blocktiles will be loaded as clouds (coinblocks and questionmark blocks remain the same!)
0x0744	Something with background palette
0x0747	Timer Control.
0x074A	Buttons pressed player 1 (keeps updated, even while paused or whatever, the other register resets the start and select immediately)
0x074B	Buttons pressed player 2 (keeps updated, even while paused or whatever, the other register resets the start and select immediately)
0x074E	"Gold" block pallette - 00 turns blocks into water world and makes bubble, but no swimming
0x0750	Area Offset- Check this page for full list of value results.
0x0752	If not 0 will crash game when level loads
0x0753	Affects mario/luigi before level load, disables movement when not 0 after level load
0x0754	Player's state. This also affects hitting stuff. Decreases when you eat a mushroom! Increases when you get hit. 0 - Big 1 - Small 2 - When set to two, you can't hit blocks but you can stand on them... (no idea where this is used) 5 - Makes you small (even when your state is big or even fiery, in fiery case you become a small fiery)
0x0755	Player_Position For Scroll. It moves up to 0x70 (sometimes even 0x72) when player moves. When this register is frozen, NOTHING changes in the level, not even internally.
0x0756	Powerup state 0 - Small 1 - Big >2 - fiery
0x075E	Set to 1 during "prelevel" screen
0x075A	Lives
0x075E	Coins
0x075F	World
0x0760	Level
0x0770	Game mode. Setting this will take affect immediately. You can skip a WORLD by setting it to 02 (and waiting a second or two). Crashes when set to >02 or when set to 02 in world 8. You can activate the demo at _any_ time. Set to 01 at the title screen and you start the game with the title screen showing. 00 - Start demo 01 - Start normal 02 - End current world 03 - End game (dead).
0x0772	Level loading setting. You can set this while playing. - 00 - Restarts level - 01 - Right before the start of a level - 02 - Has an effect but unsure what (skip frame or input?) - 03 - Reset level. When in a level when doing this midlevel, this sometimes teleports you to a bonuslevel. exiting that bonuslevel enters another bonuslevel (as if you were exiting a pipe though), and exiting that level enters the normal world again.
0x0773	Level palette 00 - Normal 01 - Underwater 02 - Night 03 - Underground 04 - Castle
0x0774	Disable ScreenFlag.
0x0775	Scroll Amount
0x0776	Game Pause Status.
0x0777	GamePauseTimer, when (un)pausing, you can only re/unpause when this is zero
0x0778	Mirror_PPU CTRL_REG1 Affects blocks and level, lowest bit seems to toggle loaded screen..? also affects sprite palletes of objects
0x0779	Mirror_PPU CTRL_REG2 Affects colors.. most values crash. It is the value written to the PPU at 0x2001. See this page for details. 1E - Default 1F - Makes it grey scale 3E - Intensify red colors 5E - Intensify green colors 9E - Intensify blue colors
0x077A	Number_Of_Players ,If true, will load luigi when mario dies. You have to unset 0753 to move with luigi though
0x077F	Interval Timer Control. runs from 20 to 0 (Also Called 21 FrameRule) From This timer Game Checks for level Completion After every 21 Frames.
0x0780-0x07A2	All kinds of timers. Should investigate more to see what timer does what. Some are explained below
0x0781	Player Animation Timer
0x0782	JumpSwim Timer
0x0783	Running Timer
0x0784	BlockBounce Timer
0x0785	SideCollision Timer
0x0786	Jumpspring Timer
0x0787	GameTimer Control Timer (Setting it to 0x02 will Freeze Game Time)
0x0789	ClimbSide Timer
0x078A	EnemyFrame Timer
0x078F	FrenzyEnemy Timer
0x0790	BowserFireBreath Timer
0x0791	Stomp Timer
0x0792	AirBubble Timer
0x0795	Timer: falling down a pit (and more...)
0x079E	Timer: invincible after enemy collision. Freeze this register to anything but 0 and you remain invincible
0x079F	Timer: star (when you have star)
0x07A0	Timer: "prelevel" screen timer, fired again when level starts
0x07A2	Timer: demo start
0x07B1	EventMusic Buffer , If true, you wont "die" after falling or getting hit while small. You will be unable to move at the bottom of the screen though until you set it to 00
0x07D7/C	High score (1000000 100000 10000 1000 100 10) in BCD Format.
0x07DD-0x07E2	Mario score (1000000 100000 10000 1000 100 10) in BCD Format.
0x07D3/8	Luigi score (1000000 100000 10000 1000 100 10) in BCD Format.
0x07ED/E	Coins (10 1) (on screen only)
0x07F8/A	Digits of Game Timer (0100 0000 0000) in BCD Format.
0x07FC	Game difficulty (set when you beat the game)