ez80dis 1.0.3

ADL-aware Z80/eZ80 disassembler

ez80dis — eZ80 disassembler

A Python disassembler for the Zilog eZ80 CPU, extending z80dis with full eZ80 instruction set support.

Found a bug? → Open an issue!

Features

• All standard Z80 instructions
• All eZ80 additions: LEA, PEA, MLT, TST, TSTIO, IN0, OUT0, SLP, STMIX, RSMIX, extended block I/O (INIM/OTIM/INI2/… families)
• eZ80 16-bit LD variants
• ADL mode: 24-bit immediates and addresses
• .lil/.lis/.sil/.sis prefixes

Installation

pip install ez80dis

API

from ez80dis import decode, disasm, Decoded, DECODE_STATUS

# Quick string — one call
print(disasm(bytes([0xDD, 0x54])))          # ld D,IXH

# Structured result
dec = decode(bytes([0x5B, 0xCD, 0x00, 0x10, 0x00]), addr=0x1000, adl=True)
print(dec.status)       # DECODE_STATUS.OK
print(dec.len)          # 5  (mode-prefix byte + CALL Opcode + 3-byte CALL target)
print(disasm(dec))      # call.lil 0x001000

# ADL mode active by default
dec = decode(bytes([0xC3, 0x00, 0x10, 0x00]), adl=True)
print(disasm(dec))      # jp 0x001000

decode(data, addr=0, adl=False) -> Decoded

Decodes one instruction from data (bytes or list of ints).

Field	Type	Description
status	DECODE_STATUS	OK, INVALID_INSTRUCTION, or ERROR
len	int	Number of bytes consumed
op	OP	Opcode enum value
operands	list	List of (OPER_TYPE, value) tuples
typ	INSTRTYPE	Instruction category
mode_suffix	str	'.lil' / '.lis' / '.sil' / '.sis' / ''
long_op	bool	True when 24-bit operands are active

disasm(data_or_decoded, pc=0, adl=False) -> str

Convenience wrapper — accepts raw bytes or an already-decoded Decoded object.

FLAGS — F-register decoder

FLAGS is an IntFlag enum for unpacking the Z80/eZ80 flags register:

Bit	Name	Meaning
0	C	Carry
1	N	Add/subtract (set after SUB, cleared after ADD; used by DAA)
2	PV	Parity / Overflow
3	F3	Undocumented copy of result bit 3
4	H	Half-carry (carry from bit 3 to 4)
5	F5	Undocumented copy of result bit 5
6	Z	Zero
7	S	Sign (MSB of A)

from ez80dis import FLAGS

f = FLAGS(0x45)          # e.g. value read from the F register
print(f.name)            # 'C|PV|Z'
print(FLAGS.Z in f)      # True
print(f & FLAGS.C)       # FLAGS.C

License

Based on z80dis by lwerdna.
z80dis was released under The Unlicense. I decided to use the same for ez80dis.