Super Mario Bros./RAM map

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

This data was found by acmlm board member frantik. It is currently posted here exactly as it was posted on the acmlm board.

(With minor updates. - 47)

RAM

Purpose

0002

Current y (vert) pos

0005

Current x (horz) pos

000A

Button State (4 - A, 8 - B)

000B

Pad State - Vertical (4 - Down, 8 - Up)

000D

Button State (4 - A, 8 - B)

000E*

Mario mode

00	Move Mario to left side of screen.
01	Climbing up vine.
02	Went in pipe.
03	Pipe2
04,05	Autowalk
06	Mario dies.
08	Normal
09	Mario can't move.

Higher numbers crash emu.

000F*

Enemy mode (00 - not shown, 01 - shown)

0014*

Show sprite (bool)

0016*

Current Enemy type 06 - goomba; 11 - lakitu; 2a - surfing lift

001B*

Current power up 2E - Mushroom/fire

001D

00 when standing, 01 when jumping, 02 when falling, 03 when sliding down flagpole

0023

set to 80 when a power up on screen. if set above 06, game will run power up checking routine

002A*

Coin anim (?)

002B*

Coin anim (?)

002C*

Coin anim (?)

002D*

Coin anim (?)

002E*

Coin anim (?)

002F*

Coin anim (?)

0030*

Coin anim (?)

0031*

Coin anim (?)

0032*

Run 200pts animation or throw hammer (?)

0033*

00 to F1: face right, F2 - FF face left

0039*

Power up type on screen (00 - mushroom, 01 - fire flower, 02 - starman, 03 - 1UP)

0045

Mario Direction (01 - Right, 02 - Left)

0046

Enemy Direction

0047

Enemy Direction

004B

Mushroom Sprite Direction (01 - Right, 02 - Left)

0057

horizontal speed (pos/neg)

0058

enemy speed (pos/neg)

0059

enemy speed (pos/neg)

005A

enemy speed (pos/neg)

006D*

Horitonal position (?)

0070

current page (?)

0071

current page (?)

0072

current page (?)

0073

current page - 1 (?)

0086*

Mario x location

0087*

current enemy 1 sprite x location

0088*

current enemy 2 sprite x location

008C*

current power up sprite x location

009F

Vertical speed

00B5

appears to be the screen height multiplier (ie [mario's y location at 00CE] * [this byte] = [mario's true y val])

00CE*

Mario sprite y pos

00CF*

enemy 1 sprite y pos

00D0*

enemy 2 sprite y pos

00D4*

Power up sprite y pos

03AD

mario x pos

03AE

enemy x pos

03B8

mario vertical pos

03B9

enemy vertical pos

03C4*

mario palette #

0400

horizontal movement counter

0416

mario vert position

0433

Mario vertical speed

0450

F8 if running

0456

28 if running

0490*

FF normal game play allows horizontal movement

04C4

power up location 1

04C6

power up location 2

06CE

fire ball counter (?) increases when fireball thrown

06D4

gold color cycle

06D5

Mario state (?) (B8 - small stand, [60, 70, 80] - small walk cycle, C8 - big stand, 20 - big jump, [00, 10, 20] - bigwalk cycle, 50 - crouch)

06FC

buttons pressed

0700

x speed

0701

is skidding

0702

E4 - is running, 30 - skidding, 98 normal

0705

some kind of horizontal movement counter, doesnt count while in air

070B

if true, runs big-small animation (doesnt affect state though)

0714*

04 when crouching

071A

current level room

071B

next level room

071C*

affects marios Horiz pos (on screen only though?)

071D*

affects marios Horiz pos (on screen only though?)

071F

scroll speed?

0743

if true, is cloud level (game sets to $03), can be set mid level

0744

affects background color

0747

timer (?) pauses enemies while set

074A

Buttons pressed

074E

"Gold" block pallette - 00 turns blocks into water world and makes bubble, but no swimming

0752

if not 00 will crash game when level load

0753

affects mario/luigi if set before level load, but prevents movement in level if not 00

0754

if true, is small

0756

Player Power-Up State

0	Small Mario
1	Big Mario
2>	Fire Flower Mario

Does not alter sprite or color palette (i.e. small Mario fires fireballs)

0757

set to 01 during "prelevel" screen

075A

lives

075E

coins

075F

Current World number minus one. This gets set to 23 when warp glitch in 1-2 takes you to level -1

0770*

game mode (00 - demo, 01 - normal, 02 - End World, 03 - End Game (?) ) (set to 01 at the title screen and you start the game with the title screen showing )

0771

0772*

00 restarts level

0773*

Level palette (00 - normal, 01 - underwater, 02 - night, 03 - underground, 04 - castle)

0774

?? changes on game and level start. crashes game if changed

0775

scroll speed (?)

0776*

is paused (bool)

0777

timer (set when pausing/unpausing

0778*

affects blocks

0779*

affects colors.. most values crash, 1E default, 1F makes it grey scale

077A*

if true, will load luigi when mario dies. you have to unset 0753 to move with luigi though

0780*

timer - (all timers count down from whatever value they are set to)

0781*

timer - fired when fireball shot

0782*

timer - fired when jumping

0783*

timer

0784*

timer

0785*

timer

0786*

timer

0787

??

0788*

timer

0789

??

078A*

timer

078B*

timer

078C*

timer

078D*

timer

078E*

timer

078F*

timer

0790*

timer

0791*

timer

0792*

timer

0793*

timer

0794*

timer

0795*

timer - fired when you fall down a pit

0796*

timer

0797*

timer

0798*

timer

0799*

timer

079A*

timer

079B*

timer

079C*

timer

079D*

timer

079E*

flashing timer (when you get hit and are invincible for a short while)

079F*

starman timer

07A0*

timer - "prelevel" screen timer, fired again when level starts

07A1*

timer

07A2*

timer - counts how long before demo is run on main screen

07A7