Z80 Disassembler Patched 〈DIRECT REVIEW〉

opcode_map = 0x00: ("NOP", 1), 0x01: ("LD BC, $%04X", 3), 0xC3: ("JP $%04X", 3), # ... full table omitted for brevity

Pseudo-structure in C:

1. Introduction: Why the Z80 Still Matters The Zilog Z80, introduced in 1976, is one of the most influential microprocessors in history. It powered everything from the Game Boy (custom LR35902, a Z80 derivative) and the Sega Master System to the Sinclair ZX Spectrum, Amstrad CPC, MSX, and countless arcade machines. Even today, it thrives in embedded systems, retrocomputing, and hobbyist scenes. z80 disassembler

To understand a Z80 binary—whether to reverse-engineer a classic game, patch a ROM, or debug vintage firmware—you need a disassembler. But a disassembler is not merely a "binary-to-text" converter. It is a lens through which we reconstruct intent, control flow, and data structures from raw machine code. opcode_map = 0x00: ("NOP", 1), 0x01: ("LD BC,

def decode_one(pc, memory): op = memory[pc] if op in opcode_map: mnemonic, length = opcode_map[op] if length == 3: operand = memory[pc+1] | (memory[pc+2] << 8) return (mnemonic % operand, length) return (mnemonic, length) else: return (".db $%02X" % op, 1) It powered everything from the Game Boy (custom

“To disassemble is to understand; to understand is to preserve.”