EarthBound Zero/RAM map

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Revision as of 16:27, 27 September 2023 by MOTHERrocks (talk | contribs) (correct formatting)
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Chip tiny.png The following article is a RAM map for EarthBound Zero.

RAM

RAM Purpose
0x0006 Part of an instruction for "copy protection". $E5 on checksum failure. $00 to bypass. "Correct"/non-hack value unknown.
0x0015 Used for assigning area to objects?
0x0060 HP target value for stat increase during level up
0x0611 Looks like the first EXP byte, but changing it even mid-battle will result in insta-death. Anti-cheat?
0x0818-B The X and Y coordinates, stored strangely; see below

Coordinates

The coordinates in RAM to not correspond to coordinates in the rest of the game. To convert it, run this Python code (in this example, bytes $818-B are `80 19 C0 2D`):

# replace with the values from the RAM
ram_x = 0x1980
ram_y = 0x2dc0

real_x = ((byte1 << 8) | (byte0 & 0xC0)) >> 2
real_y = ((byte3 << 8) | (byte2 & 0xC0) - 0x2000) >> 2

SRAM (save data)

This uses a checksum that is not figured out yet, so you can only edit it by using a save RAM editor on a live game.

  • 0000-13FF: Unknown
  • 1400-1403: Unknown
  • 1404-1407: Position
  • 1408-140F: Unknown
  • 1410-1411: Current money
  • 1412-1414: Money in bank
  • 1415-141F: Unknown
  • 1420-1430: Your name (the player name, not Ninten's name)
  • 1431-16AF: Unknown
  • 16B0-16CF: Items in storage
  • 16D0-1FF0: Other