Hacking PlayStation 2

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Gameshark

Code Types

This codes must be encrypted to work
Type	Description
8-bit RAM write 0aaaaaaa 000000dd	Writes dd to address aaaaaaa.
16-bit RAM write 1aaaaaaa 0000dddd	Writes dddd to address aaaaaaa.
32-bit RAM write 2aaaaaaa dddddddd	Writes dddddddd to address aaaaaaa.
8-bit Increment 301000nn aaaaaaaa	Increments the byte stored at address aaaaaaaa by nn.
8-bit Decrement 302000nn aaaaaaaa	Decrements the byte stored at address aaaaaaaa by nn.
16-bit Increment 3030nnnn aaaaaaaa	Increments the halfword stored at address aaaaaaaa by nnnn.
16-bit Decrement 3040nnnn aaaaaaaa	Decrements the halfword stored at address aaaaaaaa by nnnn.
32-bit Increment 30500000 aaaaaaaa nnnnnnnn 00000000	Increments the word stored at address aaaaaaaa by nnnnnnnn.
32-bit Decrement 30600000 aaaaaaaa nnnnnnnn 00000000	Decrements the word stored at address aaaaaaaa by nnnnnnnn.
16-bit If Equal To Daaaaaaa 0000dddd	The next code is executed only if the halfword at address aaaaaaa is equal to dddd.
16-bit If Not Equal To Daaaaaaa 0010dddd	The next code is executed only if the halfword at address aaaaaaa is not equal to dddd.
16-bit If Less Than Daaaaaaa 0020dddd	The next code is executed only if the halfword at address aaaaaaa is less than dddd.
16-bit If Greater Than Daaaaaaa 0030dddd	The next code is executed only if the halfword at address aaaaaaa is greater than dddd.
16-bit If Equal To: Multi-line Skip Ennndddd 0aaaaaaa	Executes the next nnn codes only if the halfword at address aaaaaaa is equal to dddd.
16-bit If Not Equal To: Multi-line Skip Ennndddd 1aaaaaaa	Executes the next nnn codes only if the halfword at address aaaaaaa is not equal to dddd.
16-bit If Less Than: Multi-line Skip Ennndddd 2aaaaaaa	Executes the next nnn codes only if the halfword at address aaaaaaa is less than dddd.
16-bit If Greater Than: Multi-line Skip Ennndddd 3aaaaaaa	Executes the next nnn codes only if the halfword at address aaaaaaa is greater than dddd.
Copy Bytes 5aaaaaaa nnnnnnnn bbbbbbbb 00000000	Copies nnnnnnnn bytes from address aaaaaaa to bbbbbbbb. GS 2.0+ only.
Slide Code 4aaaaaaa xxxxyyyy dddddddd 00000000	Writes the word dddddddd to xxxx addresses starting with aaaaaaa, incrementing the address by yyyy * 4.
Deadface DEADFACE xxxxxxxx	Changes encryption seeds.

Action Replay

Codebreaker

Encryption/Decryption

Playstation 2 AR Max

AR Max

Joypad Values

PS2 games can use any one of four different value systems for storing button presses depending on the game. The only way to determine which system is used is to hack the joypad reader itself.

Normal

These are the values used in the GS D4, D5, and D6 code types. Combine buttons by using bitwise OR.

Button	Value
Select	0x0001
L3	0x0002
R3	0x0004
Start	0x0008
Up	0x0010
Right	0x0020
Down	0x0040
Left	0x0080
L2	0x0100
R2	0x0200
L1	0x0400
R1	0x0800
Triangle	0x1000
Circle	0x2000
X	0x4000
O	0x8000

Reverse

This alternative button storage method had its values combined using bitwise OR. These values are determined by byteswapping the normal values.

Button	Value
L2	0x0001
R2	0x0002
L1	0x0004
R1	0x0008
Triangle	0x0010
Circle	0x0020
X	0x0040
Square	0x0080
Select	0x0100
L3	0x0200
R3	0x0400
Start	0x0800
Up	0x1000
Right	0x2000
Down	0x4000
Left	0x8000

Max Normal

These values are determined by subtracting the Normal joypad values from 0xFFFF. Buttons are combined with bitwise AND.

Button	Value
Select	0xFFFE
L3	0xFFFD
R3	0xFFFB
Start	0xFFF7
Up	0xFFEF
Right	0xFFDF
Down	0xFFBF
Left	0xFF7F
L2	0xFEFF
R2	0xFDFF
L1	0xFBFF
R1	0xF7FF
Triangle	0xEFFF
O	0xDFFF
X	0xBFFF
Square	0x7FFF

Max Reverse

These values are determined by subtracting the Reverse values from 0xFFFF.

Button	Value
L2	0xFFFE
R2	0xFFFD
L1	0xFFFB
R1	0xFFF7
Triangle	0xFFEF
Circle	0xFFDF
X	0xFFBF
Square	0xFF7F
Select	0xFEFF
L3	0xFDFF
R3	0xFBFF
Start	0xF7FF
Up	0xEFFF
Right	0xDFFF
Down	0xBFFF
Left	0x7FFF