User:Zeroman/GameBoy GBZ80 opcodes list

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Opcodes

Opcode Opcode ID Translation of opcode
HEX DEC BIN
nop 0x00 000 00000000 nothing happens
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
stop 0x10 016 00010000 stops everything, but freezes the game
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
0x20
0x21
0x22
0x23
0x24
0x25
0x26
0x27
0x28
0x29
0x2A
0x2B
0x2C
0x2D
0x2E
0x2F
0x30
0x31
0x32
0x33
0x34
0x35
0x36
0x37
0x38
0x39
0x3A
0x3B
0x3C
0x3D
0x3E
0x3F
0x40
0x41
0x42
0x43
0x44
0x45
0x46
0x47
0x48
0x49
0x4A
0x4B
0x4C
0x4D
0x4E
0x4F
0x50
0x51
0x52
0x53
0x54
0x55
0x56
0x57
0x58
0x59
0x5A
0x5B
0x5C
0x5D
0x5E
0x5F
0x60
0x61
0x62
0x63
0x64
0x65
0x66
0x67
0x68
0x69
0x6A
0x6B
0x6C
0x6D
0x6E
0x6F
0x70
0x71
0x72
0x73
0x74
0x75
0x76
0x77
0x78
0x79
0x7A
0x7B
0x7C
0x7D
0x7E
0x7F
0x80 128 (unsigned)

–128 (signed)

0x81 129 (unsigned)

–127 (signed)

0x82 130 (unsigned)

–126 (signed)

0x83 131 (unsigned)

–125 (signed)

0x84
0x85
0x86
0x87
0x88
0x89
0x8A
0x8B
0x8C
0x8D
0x8E
0x8F
0x90
0x91
0x92
0x93
0x94
0x95
0x96
0x97
0x98
0x99
0x9A
0x9B
0x9C
0x9D
0x9E
0x9F
0xA0
0xA1
0xA2
0xA3
0xA4
0xA5
0xA6
0xA7
0xA8
0xA9
0xAA
0xAB
0xAC
0xAD
0xAE
0xAF
0xB0
0xB1
0xB2
0xB3
0xB4
0xB5
0xB6
0xB7
0xB8
0xB9
0xBA
0xBB
0xBC
0xBD
0xBE
0xBF
0xC0
0xC1
0xC2
jp $xxyy 0xC3 195 (unsigned)

–67 (signed)

11000011
0xC4
0xC5
0xC6
rst $00 0xC7 calls $0000 (which is usually a 0xFF byte), causing the game to freeze.
0xC8
0xC9
0xCA
0xCB
0xCC
call $xxyy 0xCD
0xCE
rst $08 0xCF calls $0008 (which is usually a 0xFF byte), causing the game to freeze.
0xD0
0xD1
0xD2
0xD3
0xD4
0xD5
0xD6
rst $10 0xD7 calls $0010 (which is usually a 0xFF byte), causing the game to freeze.
0xD8
0xD9
0xDA
0xDB
0xDC
0xDD
0xDE
rst $18 0xDF calls $0018 (which is usually a 0xFF byte), causing the game to freeze.
0xE0
0xE1
0xE2
0xE3
0xE4
0xE5
0xE6
rst $20 0xE7 calls $0020 (which is usually a 0xFF byte), causing the game to freeze.
0xE8
0xE9
0xEA
0xEB
0xEC
0xED
0xEE
rst $28 0xEF calls $0028 (which is usually a 0xFF byte), causing the game to freeze.
0xF0
0xF1
0xF2
0xF3
0xF4
0xF5
0xF6
rst $30 0xF7 calls $0030 (which is usually a 0xFF byte), causing the game to freeze.
0xF8
0xF9
0xFA
0xFB
0xFC
0xFD
cp $xx 0xFE 254 (unsigned)

–2 (signed)

11111110
rst $38 0xFF 255 (unsigned)

–1 (signed)

11111111 calls $0038 (which is usually a 0xFF byte), causing the game to freeze.

How I inserted all 256 hex bytes

I added "0xZX" with X being from 0 to F, for 16 at a time, did it 16 times (coincidentally, 16 x 16 = 256). I replaced "Z" with 0 to F.

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