Game Boy Boot ROM Disassembly

0x0000:
    LD SP, 0xFFFE
    XOR A, A
    LD HL, 0x9FFF

0x0007:
    LD (HL-), A
    BIT 7, H
    JR NZ, 0x00FB
    LD HL, 0xFF26
    LD C, 0x11
    LD A, 0x80
    LD (HL-), A
    LD (0xFF00 + C), A
    INC C
    LD A, 0xF3
    LD (0xFF00 + C), A
    LD (HL-), A
    LD A, 0x77
    LD (HL), A
    LD A, 0xFC
    LD (0xFF00 + 0x47), A
    LD DE, 0x0104
    LD HL, 0x8010

0x0027:
    LD A, (DE)
    CALL 0x0095
    CALL 0x0096
    INC DE
    LD A, E
    CP A, 0x34
    JR NZ, 0x00F3
    LD DE, 0x00D8
    LD B, 0x08

0x0039:
    LD A, (DE)
    INC DE
    LD (HL+), A
    INC HL
    DEC B
    JR NZ, 0x00F9
    LD A, 0x19
    LD (0x9910), A
    LD HL, 0x992F

0x0048:
    LD C, 0x0C

0x004A:
    DEC A
    JR Z, 0x0008
    LD (HL-), A
    DEC C
    JR NZ, 0x00F9
    LD L, 0x0F
    JR 0xF3
    LD H, A
    LD A, 0x64
    LD D, A
    LD (0xFF00 + 0x42), A
    LD A, 0x91
    LD (0xFF00 + 0x40), A
    INC B

0x0060:
    LD E, 0x02

0x0062:
    LD C, 0x0C

0x0064:
    LD A, (0xFF00 + 0x44)
    CP A, 0x90
    JR NZ, 0x00FA
    DEC C
    JR NZ, 0x00F7
    DEC E
    JR NZ, 0x00F2
    LD C, 0x13
    INC H
    LD A, H
    LD E, 0x83
    CP A, 0x62
    JR Z, 0x0006
    LD E, 0xC1
    CP A, 0x64
    JR NZ, 0x0006

0x0080:
    LD A, E
    LD (0xFF00 + C), A
    INC C
    LD A, 0x87
    LD (0xFF00 + C), A

0x0086:
    LD A, (0xFF00 + 0x42)
    SUB A, B
    LD (0xFF00 + 0x42), A
    DEC D
    JR NZ, 0x00D2
    DEC B
    JR NZ, 0x004F
    LD D, 0x20
    JR 0xCB
    LD C, A

0x0096:
    LD B, 0x04

0x0098:
    PUSH BC
    RL C
    RL_A
    POP BC
    RL C
    RL_A
    DEC B
    JR NZ, 0x00F5
    LD (HL+), A
    INC HL
    LD (HL+), A
    INC HL
    RET

0x00A8:
    DATA 0xCEED6666CC0D000B03730083000C000D0008111F8889000EDCCC6EE6
    DATA 0xDDDDD999BBBB67636E0EECCCDDDC999FBBB9333E3C42B9A5B9A5423C


0x00E0:
    LD HL, 0x0104
    LD DE, 0x00A8

0x00E6:
    LD A, (DE)
    INC DE
    CP A, (HL)

0x00E9:
    JR NZ, 0x00FE
    INC HL
    LD A, L
    CP A, 0x34
    JR NZ, 0x00F5
    LD B, 0x19
    LD A, B

0x00F4:
    ADD A, (HL)
    INC HL
    DEC B
    JR NZ, 0x00FB
    ADD A, (HL)

0x00FA:
    JR NZ, 0x00FE
    LD A, 0x01
    LD (0xFF00 + 0x50), A