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Super Mario Bros. 3/RAM map
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NOTE: All values in Table are Hexadecimal unless noted otherwise.
The following article is a RAM map for Super Mario Bros. 3.
| RAM | Purpose |
| 0A | Temp. used to adjust main character sprite vertical position |
| 15 | Increased by one every game cycle. Used as timer |
| 75 | On map screen vertical position. Multiples of 20, unless in boat. |
| 77 | Page counter on map screen |
| 78 | On map screen vertical position (see next RAM location description) |
| 79 | On map screen horizontal position. Multiples of 20, unless in boat. If multipaged, E0 shifts screen right, then 60, then D0, then 50. Shifting back to the left occurs at 20, then A0, then 20, then A0. |
| 90 | Mario/Luigi horizontal position. Changing may cause problems in Name Table. |
| A2 | Mario/Luigi vetical position in levels. |
| A3-?? | Enemy Sprite positions on screen |
| BD | Current horizontal speed |
| ED | Current Form: 00-Small, 01-Super, 02-Fire, 03-Racoon, 04-Frog, 05-Bear, 06-Hammer |
| EE | Mario/Luigi Character Sprite Displayed(gets set just before display) |
| EF | Mario/Luigi status flag: 40 facing right, 00 facing left |
| 0100-01FF | CPU Stack |
| 03DD | Power Meter in Status Bar, 7F is Full (Player Can Fly) |
| 03F3 | Character selection on map |
| 04F1 | (??) Set to $00 to remove some sounds (i.e. full fly meter sound) |
| 0552 | Timer that is set after player is hit. Determine how long you flash (are invincible) |
| 0553 | Timer for star mario |
| 0567 | Timer for P-Block |
| 056E | Timer that determines how long flight will last. Power Meter instantly empties when this hits zero. Setting to FF enables unlimited flight. |
| 056F | (??) Set to $FF for squat-float effect |
| 0577 | Determines if Player is inside the Goomba Boot: 00-No, 01-Yes |
| 057A | Enable statue mario characteristic (gray & invincible, note: can't go down pipes with this characteristic enabled) |
| 057B | (??) Set to $FF to fill up fly meter while standing still |
| 0584 | Underwater / not underwater selection |
| 0585 | (??) Set to $FF to slide "right" (not left) through solid objects |
| 0588 | Timer for "Backstage" status |
| 05EE-05F0 | Time remaining |
| 0669 | The item you'll get from a toad house |
| 066F | Card selection for the flashing card that you jump to get |
| 0715-0717 | current player score divided by dec10. (max F423F[dec999,999]) (There's a hard coded 0 in the score display) |
| 0736 | Mario # of Lives (max 63[dec99]) |
| 0737 | Luigi # of Lives |
| 0746 | Mario's Form that he will start next level as. When the level is loaded this value gets transferred to 00ED. |
| 0747 | For Luigi; See 0746. |
| 7D80-7D9B | Each Byte Represents an Item that Mario is Carrying (Pressing 'B' while at Map Screen): 00-No Item, 01-Mushroom, 02-Flower, 03-Leaf, 04-Frog, 05-Bear, 06-Hammer Bro Suit, 07-Cloud, 08-P-Wing, 09-Star, 0A-Anchor, 0B-Hammer, 0C-Whistle, 0D-Music Box. 0E and above will most likely crash the game, not completely tested though. |
| 7D9C-7D9E | Each Byte Represents a reward card Mario has 00-No Item, 01-Mushroom, 02-Flower, 03-Star |
| 7D9F-7DA1 | Storage for Mario Score (/dec10) |
| 7DA2 | # of coins Mario has |
| 7DA3-7DBE | Each Byte Represents an Item that Luigi is Carrying (Pressing 'B' while at Map Screen): 00-No Item, 01-Mushroom, 02-Flower, 03-Leaf, 04-Frog, 05-Bear, 06-Hammer Bro Suit, 07-Cloud, 08-P-Wing, 09-Star, 0A-Anchor, 0B-Hammer, 0C-Whistle, 0D-Music Box. 0E and above will most likely crash the game, not completely tested though. |
| 7DBF-7DC1 | Each Byte Represents a reward card Luigi has 00-No Item, 01-Mushroom, 02-Flower, 03-Star |
| 7DC2-7DC4 | Storage for Luigi Score(/dec10) |
| 7DC5 | # of coins Luigi has |
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