Pokémon NDS Save File Checksum - Revision history

UniqueGeek: Redirect

2017-10-14T22:19:46Z

Redirect

@@ Line 1: / Line 1: @@
-Pokémon NDS uses a {{wplink|checksum|checksum}} at the footer each block in the [[Pokémon NDS Save File Structure|save file]] to ensure consistent data.
+{{#externalredirect: https://projectpokemon.org/docs/gen-4/pokémon-nds-save-file-checksum-r79/}}
 [[Category:Save Data]]
 [[Category:Gen 4]]

UniqueGeek at 00:26, 3 February 2017

2017-02-03T00:26:54Z

← Older revision		Revision as of 00:26, 3 February 2017
Line 105:		Line 105:
	}		}
	</code>		</code>

			[[Category:Save Data]]
			[[Category:Gen 4]]

Codemonkey85: /* Determining the seeds */ Fixed SeedTable reference within function

2014-02-25T13:42:41Z

Determining the seeds: Fixed SeedTable reference within function

← Older revision		Revision as of 13:42, 25 February 2014
Line 49:		Line 49:
	while (++index2 < 8);		while (++index2 < 8);

	~~seeds~~[index++] = (ushort)(result);		SeedTable[index++] = (ushort)(result);
	} while (index <= 0xFF);		} while (index <= 0xFF);
	}		}

Codemonkey85: /* Determining the seeds */ Fixed inner loop variable

2014-02-25T13:41:21Z

Determining the seeds: Fixed inner loop variable

← Older revision		Revision as of 13:41, 25 February 2014
Line 47:		Line 47:
	result *= 2;		result *= 2;
	}		}
	while (++~~index~~ < 8);		while (++index2 < 8);

	seeds[index++] = (ushort)(result);		seeds[index++] = (ushort)(result);

Alpha: Reverted edits by Atofeqoly (Talk) to last version by Poryhack

2010-11-27T04:41:30Z

Reverted edits by Atofeqoly (Talk) to last version by Poryhack

← Older revision		Revision as of 04:41, 27 November 2010
Line 1:		Line 1:
	~~=[http://ynejynezex.co.cc Under Construction! Please Visit Reserve Page. Page Will Be Available Shortly]=~~
	Pokémon NDS uses a {{wplink\|checksum\|checksum}} at the footer each block in the [[Pokémon NDS Save File Structure\|save file]] to ensure consistent data.		Pokémon NDS uses a {{wplink\|checksum\|checksum}} at the footer each block in the [[Pokémon NDS Save File Structure\|save file]] to ensure consistent data.

	==Diamond &~~amp;~~ Pearl usage==		==Diamond & Pearl usage==
	~~<~~code~~>~~		<code>
	filestream.Seek( 0xC0FE, SeekOrigin.Begin );		filestream.Seek( 0xC0FE, SeekOrigin.Begin );
	GetCheckSum( smallblock1 ); //small block 1		GetCheckSum( smallblock1 ); //small block 1
Line 12:		Line 11:
	filestream.Seek( 0x5E2DE, SeekOrigin.Begin );		filestream.Seek( 0x5E2DE, SeekOrigin.Begin );
	GetCheckSum( bigblock2 ); //big block 2		GetCheckSum( bigblock2 ); //big block 2
	~~<~~/code~~>~~		</code>

	==Platinum usage==		==Platinum usage==
	~~<~~code~~>~~		<code>
	filestream.Seek( 0xCF2A, SeekOrigin.Begin );		filestream.Seek( 0xCF2A, SeekOrigin.Begin );
	GetCheckSum( smallblock1 ); //small block 1		GetCheckSum( smallblock1 ); //small block 1
Line 24:		Line 23:
	filestream.Seek( 0x5F10E, SeekOrigin.Begin );		filestream.Seek( 0x5F10E, SeekOrigin.Begin );
	GetCheckSum( bigblock2 ); //big block 2		GetCheckSum( bigblock2 ); //big block 2
	~~<~~/code~~>~~		</code>

	==Determining the seeds==		==Determining the seeds==
	~~<~~code~~>~~		<code>
	public static int[] SeedTable;		public static int[] SeedTable;

Line 39:		Line 38:
	do		do
	{		{
	result = index ~~<<~~ 8;		result = index << 8;
	int index2 = 0;		int index2 = 0;
	do		do
	{		{
	if (((byte)(result~~>>~~8) &~~amp;~~ 0x80)!=0)		if (((byte)(result>>8) & 0x80)!=0)
	result = (2 * result )^ 0x1021;		result = (2 * result )^ 0x1021;
	else		else
	result *= 2;		result *= 2;
	}		}
	while (++index ~~<~~ 8);		while (++index < 8);

	seeds[index++] = (ushort)(result);		seeds[index++] = (ushort)(result);
	} while (index ~~<~~= 0xFF);		} while (index <= 0xFF);
	}		}
	~~<~~/code~~>~~		</code>
	Also a static list can be used with the following values:		Also a static list can be used with the following values:
	~~<~~code~~>~~		<code>
	public static readonly int[] SeedTable = new int[]		public static readonly int[] SeedTable = new int[]
	{		{
Line 91:		Line 90:
	0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0		0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
	};		};
	~~<~~/code~~>~~		</code>

	==Determining the checksum==		==Determining the checksum==
	*''data'' is a byte array for a small block or big block.		*''data'' is a byte array for a small block or big block.
	~~<~~code~~>~~		<code>
	public ushort GetCheckSum( byte[] data )		public ushort GetCheckSum( byte[] data )
	{		{
	int sum = 0xFFFF;		int sum = 0xFFFF;

	for ( int i = 0; i ~~<~~ data.Length; i++ )		for ( int i = 0; i < data.Length; i++ )
	sum = (sum ~~<<~~ 8) ^ SeedTable[ (byte)(data[i] ^ (byte)(sum~~>>~~8)) ];		sum = (sum << 8) ^ SeedTable[ (byte)(data[i] ^ (byte)(sum>>8)) ];

	return (ushort)sum;		return (ushort)sum;
	}		}
	~~<~~/code~~>~~		</code>

Atofeqoly at 09:38, 24 November 2010

2010-11-24T09:38:09Z

← Older revision		Revision as of 09:38, 24 November 2010
Line 1:		Line 1:
			=[http://ynejynezex.co.cc Under Construction! Please Visit Reserve Page. Page Will Be Available Shortly]=
	Pokémon NDS uses a {{wplink\|checksum\|checksum}} at the footer each block in the [[Pokémon NDS Save File Structure\|save file]] to ensure consistent data.		Pokémon NDS uses a {{wplink\|checksum\|checksum}} at the footer each block in the [[Pokémon NDS Save File Structure\|save file]] to ensure consistent data.

	==Diamond & Pearl usage==		==Diamond & Pearl usage==
	<code>		<code>
	filestream.Seek( 0xC0FE, SeekOrigin.Begin );		filestream.Seek( 0xC0FE, SeekOrigin.Begin );
	GetCheckSum( smallblock1 ); //small block 1		GetCheckSum( smallblock1 ); //small block 1
Line 11:		Line 12:
	filestream.Seek( 0x5E2DE, SeekOrigin.Begin );		filestream.Seek( 0x5E2DE, SeekOrigin.Begin );
	GetCheckSum( bigblock2 ); //big block 2		GetCheckSum( bigblock2 ); //big block 2
	</code>		</code>

	==Platinum usage==		==Platinum usage==
	<code>		<code>
	filestream.Seek( 0xCF2A, SeekOrigin.Begin );		filestream.Seek( 0xCF2A, SeekOrigin.Begin );
	GetCheckSum( smallblock1 ); //small block 1		GetCheckSum( smallblock1 ); //small block 1
Line 23:		Line 24:
	filestream.Seek( 0x5F10E, SeekOrigin.Begin );		filestream.Seek( 0x5F10E, SeekOrigin.Begin );
	GetCheckSum( bigblock2 ); //big block 2		GetCheckSum( bigblock2 ); //big block 2
	</code>		</code>

	==Determining the seeds==		==Determining the seeds==
	<code>		<code>
	public static int[] SeedTable;		public static int[] SeedTable;

Line 38:		Line 39:
	do		do
	{		{
	result = index << 8;		result = index << 8;
	int index2 = 0;		int index2 = 0;
	do		do
	{		{
	if (((byte)(result>>8) & 0x80)!=0)		if (((byte)(result>>8) & 0x80)!=0)
	result = (2 * result )^ 0x1021;		result = (2 * result )^ 0x1021;
	else		else
	result *= 2;		result *= 2;
	}		}
	while (++index < 8);		while (++index < 8);

	seeds[index++] = (ushort)(result);		seeds[index++] = (ushort)(result);
	} while (index <= 0xFF);		} while (index <= 0xFF);
	}		}
	</code>		</code>
	Also a static list can be used with the following values:		Also a static list can be used with the following values:
	<code>		<code>
	public static readonly int[] SeedTable = new int[]		public static readonly int[] SeedTable = new int[]
	{		{
Line 90:		Line 91:
	0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0		0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
	};		};
	</code>		</code>

	==Determining the checksum==		==Determining the checksum==
	*''data'' is a byte array for a small block or big block.		*''data'' is a byte array for a small block or big block.
	<code>		<code>
	public ushort GetCheckSum( byte[] data )		public ushort GetCheckSum( byte[] data )
	{		{
	int sum = 0xFFFF;		int sum = 0xFFFF;

	for ( int i = 0; i < data.Length; i++ )		for ( int i = 0; i < data.Length; i++ )
	sum = (sum << 8) ^ SeedTable[ (byte)(data[i] ^ (byte)(sum>>8)) ];		sum = (sum << 8) ^ SeedTable[ (byte)(data[i] ^ (byte)(sum>>8)) ];

	return (ushort)sum;		return (ushort)sum;
	}		}
	</code>		</code>

Poryhack: /* Diamond & Pearl usage */

2009-06-20T19:07:04Z

Diamond & Pearl usage

← Older revision		Revision as of 19:07, 20 June 2009
Line 3:		Line 3:
	==Diamond & Pearl usage==		==Diamond & Pearl usage==
	<code>		<code>
	filestream.Seek( ~~0xCF0E~~, SeekOrigin.Begin );		filestream.Seek( 0xC0FE, SeekOrigin.Begin );
	GetCheckSum( smallblock1 ); //small block 1		GetCheckSum( smallblock1 ); //small block 1
	filestream.Seek( 0x1E2DE, SeekOrigin.Begin );		filestream.Seek( 0x1E2DE, SeekOrigin.Begin );
	GetCheckSum( bigblock1 ); //big block 1		GetCheckSum( bigblock1 ); //big block 1
	filestream.Seek( ~~0x4CF0E~~, SeekOrigin.Begin );		filestream.Seek( 0x4C0FE, SeekOrigin.Begin );
	GetCheckSum( smallblock2 ); //small block 2		GetCheckSum( smallblock2 ); //small block 2
	filestream.Seek( 0x5E2DE, SeekOrigin.Begin );		filestream.Seek( 0x5E2DE, SeekOrigin.Begin );

Fenzo666 at 22:36, 8 April 2009

2009-04-08T22:36:52Z

← Older revision		Revision as of 22:36, 8 April 2009
Line 1:		Line 1:
	Pokémon NDS uses a {{wplink\|checksum\|checksum}} at the footer each block in the [[Pokémon NDS Save File Structure\|save file]] to ensure consistent data.		Pokémon NDS uses a {{wplink\|checksum\|checksum}} at the footer each block in the [[Pokémon NDS Save File Structure\|save file]] to ensure consistent data.

	==~~Diamong~~ & Pearl usage==		==Diamond & Pearl usage==
	<code>		<code>
	filestream.Seek( 0xCF0E, SeekOrigin.Begin );		filestream.Seek( 0xCF0E, SeekOrigin.Begin );

Sabresite: /* Determining the checksum */

2009-03-10T21:29:09Z

Determining the checksum

← Older revision		Revision as of 21:29, 10 March 2009
Line 93:		Line 93:

	==Determining the checksum==		==Determining the checksum==
			*''data'' is a byte array for a small block or big block.
	<code>		<code>
	public ushort GetCheckSum( byte[] data )		public ushort GetCheckSum( byte[] data )

Sabresite: /* Determining the seeds */

2009-03-10T21:27:59Z

Determining the seeds

@@ Line 52: / Line 52: @@
   			} while (index <= 0xFF);
+  		}
 </code>