code_6502: C++98/STL parsing library

This spec can be used to disassemble raw stream of 6502 CPU machine code into individual operations. Each operation includes an opcode and, optionally, an argument. Register arguments are part of the opcode enum.

KS implementation details

License: CC0-1.0

References

This page hosts a formal specification of code_6502 using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.

Usage

Runtime library

All parsing code for C++98/STL generated by Kaitai Struct depends on the C++/STL runtime library. You have to install it before you can parse data.

For C++, the easiest way is to clone the runtime library sources and build them along with your project.

Code

Using Kaitai Struct in C++/STL usually consists of 3 steps.

  1. We need to create an STL input stream (std::istream). One can open local file for that, or use existing std::string or char* buffer.
    #include <fstream>
    
    std::ifstream is("path/to/local/file.code_6502", std::ifstream::binary);
    
    #include <sstream>
    
    std::istringstream is(str);
    
    #include <sstream>
    
    const char buf[] = { ... };
    std::string str(buf, sizeof buf);
    std::istringstream is(str);
    
  2. We need to wrap our input stream into Kaitai stream:
    #include "kaitai/kaitaistream.h"
    
    kaitai::kstream ks(&is);
    
  3. And finally, we can invoke the parsing:
    code_6502_t data(&ks);
    

After that, one can get various attributes from the structure by invoking getter methods like:

data.operations() // => get operations

C++98/STL source code to parse code_6502

code_6502.h

#ifndef CODE_6502_H_
#define CODE_6502_H_

// This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild

#include "kaitai/kaitaistruct.h"
#include <stdint.h>
#include <vector>

#if KAITAI_STRUCT_VERSION < 9000L
#error "Incompatible Kaitai Struct C++/STL API: version 0.9 or later is required"
#endif

/**
 * This spec can be used to disassemble raw stream of 6502 CPU machine
 * code into individual operations. Each operation includes an opcode
 * and, optionally, an argument. Register arguments are part of the
 * `opcode` enum.
 */

class code_6502_t : public kaitai::kstruct {

public:
    class operation_t;

    enum opcode_t {
        OPCODE_BRK_IMPL = 0,
        OPCODE_ORA_X_IND = 1,
        OPCODE_ORA_ZPG = 5,
        OPCODE_ASL_ZPG = 6,
        OPCODE_PHP_IMPL = 8,
        OPCODE_ORA_IMM = 9,
        OPCODE_ASL_A = 10,
        OPCODE_ORA_ABS = 13,
        OPCODE_ASL_ABS = 14,
        OPCODE_BPL_REL = 16,
        OPCODE_ORA_IND_Y = 17,
        OPCODE_ORA_ZPG_X = 21,
        OPCODE_ASL_ZPG_X = 22,
        OPCODE_CLC_IMPL = 24,
        OPCODE_ORA_ABS_Y = 25,
        OPCODE_ORA_ABS_X = 29,
        OPCODE_ASL_ABS_X = 30,
        OPCODE_JSR_ABS = 32,
        OPCODE_AND_X_IND = 33,
        OPCODE_BIT_ZPG = 36,
        OPCODE_AND_ZPG = 37,
        OPCODE_ROL_ZPG = 38,
        OPCODE_PLP_IMPL = 40,
        OPCODE_AND_IMM = 41,
        OPCODE_ROL_A = 42,
        OPCODE_BIT_ABS = 44,
        OPCODE_AND_ABS = 45,
        OPCODE_ROL_ABS = 46,
        OPCODE_BMI_REL = 48,
        OPCODE_AND_IND_Y = 49,
        OPCODE_AND_ZPG_X = 53,
        OPCODE_ROL_ZPG_X = 54,
        OPCODE_SEC_IMPL = 56,
        OPCODE_AND_ABS_Y = 57,
        OPCODE_AND_ABS_X = 61,
        OPCODE_ROL_ABS_X = 62,
        OPCODE_RTI_IMPL = 64,
        OPCODE_EOR_X_IND = 65,
        OPCODE_EOR_ZPG = 69,
        OPCODE_LSR_ZPG = 70,
        OPCODE_PHA_IMPL = 72,
        OPCODE_EOR_IMM = 73,
        OPCODE_LSR_A = 74,
        OPCODE_JMP_ABS = 76,
        OPCODE_EOR_ABS = 77,
        OPCODE_LSR_ABS = 78,
        OPCODE_BVC_REL = 80,
        OPCODE_EOR_IND_Y = 81,
        OPCODE_EOR_ZPG_X = 85,
        OPCODE_LSR_ZPG_X = 86,
        OPCODE_CLI_IMPL = 88,
        OPCODE_EOR_ABS_Y = 89,
        OPCODE_EOR_ABS_X = 93,
        OPCODE_LSR_ABS_X = 94,
        OPCODE_RTS_IMPL = 96,
        OPCODE_ADC_X_IND = 97,
        OPCODE_ADC_ZPG = 101,
        OPCODE_ROR_ZPG = 102,
        OPCODE_PLA_IMPL = 104,
        OPCODE_ADC_IMM = 105,
        OPCODE_ROR_A = 106,
        OPCODE_JMP_IND = 108,
        OPCODE_ADC_ABS = 109,
        OPCODE_ROR_ABS = 110,
        OPCODE_BVS_REL = 112,
        OPCODE_ADC_IND_Y = 113,
        OPCODE_ADC_ZPG_X = 117,
        OPCODE_ROR_ZPG_X = 118,
        OPCODE_SEI_IMPL = 120,
        OPCODE_ADC_ABS_Y = 121,
        OPCODE_ADC_ABS_X = 125,
        OPCODE_ROR_ABS_X = 126,
        OPCODE_STA_X_IND = 129,
        OPCODE_STY_ZPG = 132,
        OPCODE_STA_ZPG = 133,
        OPCODE_STX_ZPG = 134,
        OPCODE_DEY_IMPL = 136,
        OPCODE_TXA_IMPL = 138,
        OPCODE_STY_ABS = 140,
        OPCODE_STA_ABS = 141,
        OPCODE_STX_ABS = 142,
        OPCODE_BCC_REL = 144,
        OPCODE_STA_IND_Y = 145,
        OPCODE_STY_ZPG_X = 148,
        OPCODE_STA_ZPG_X = 149,
        OPCODE_STX_ZPG_Y = 150,
        OPCODE_TYA_IMPL = 152,
        OPCODE_STA_ABS_Y = 153,
        OPCODE_TXS_IMPL = 154,
        OPCODE_STA_ABS_X = 157,
        OPCODE_LDY_IMM = 160,
        OPCODE_LDA_X_IND = 161,
        OPCODE_LDX_IMM = 162,
        OPCODE_LDY_ZPG = 164,
        OPCODE_LDA_ZPG = 165,
        OPCODE_LDX_ZPG = 166,
        OPCODE_TAY_IMPL = 168,
        OPCODE_LDA_IMM = 169,
        OPCODE_TAX_IMPL = 170,
        OPCODE_LDY_ABS = 172,
        OPCODE_LDA_ABS = 173,
        OPCODE_LDX_ABS = 174,
        OPCODE_BCS_REL = 176,
        OPCODE_LDA_IND_Y = 177,
        OPCODE_LDY_ZPG_X = 180,
        OPCODE_LDA_ZPG_X = 181,
        OPCODE_LDX_ZPG_Y = 182,
        OPCODE_CLV_IMPL = 184,
        OPCODE_LDA_ABS_Y = 185,
        OPCODE_TSX_IMPL = 186,
        OPCODE_LDY_ABS_X = 188,
        OPCODE_LDA_ABS_X = 189,
        OPCODE_LDX_ABS_Y = 190,
        OPCODE_CPY_IMM = 192,
        OPCODE_CMP_X_IND = 193,
        OPCODE_CPY_ZPG = 196,
        OPCODE_CMP_ZPG = 197,
        OPCODE_DEC_ZPG = 198,
        OPCODE_INY_IMPL = 200,
        OPCODE_CMP_IMM = 201,
        OPCODE_DEX_IMPL = 202,
        OPCODE_CPY_ABS = 204,
        OPCODE_CMP_ABS = 205,
        OPCODE_DEC_ABS = 206,
        OPCODE_BNE_REL = 208,
        OPCODE_CMP_IND_Y = 209,
        OPCODE_CMP_ZPG_X = 213,
        OPCODE_DEC_ZPG_X = 214,
        OPCODE_CLD_IMPL = 216,
        OPCODE_CMP_ABS_Y = 217,
        OPCODE_CMP_ABS_X = 221,
        OPCODE_DEC_ABS_X = 222,
        OPCODE_CPX_IMM = 224,
        OPCODE_SBC_X_IND = 225,
        OPCODE_CPX_ZPG = 228,
        OPCODE_SBC_ZPG = 229,
        OPCODE_INC_ZPG = 230,
        OPCODE_INX_IMPL = 232,
        OPCODE_SBC_IMM = 233,
        OPCODE_NOP_IMPL = 234,
        OPCODE_CPX_ABS = 236,
        OPCODE_SBC_ABS = 237,
        OPCODE_INC_ABS = 238,
        OPCODE_BEQ_REL = 240,
        OPCODE_SBC_IND_Y = 241,
        OPCODE_SBC_ZPG_X = 245,
        OPCODE_INC_ZPG_X = 246,
        OPCODE_SED_IMPL = 248,
        OPCODE_SBC_ABS_Y = 249,
        OPCODE_SBC_ABS_X = 253,
        OPCODE_INC_ABS_X = 254
    };

    code_6502_t(kaitai::kstream* p__io, kaitai::kstruct* p__parent = 0, code_6502_t* p__root = 0);

private:
    void _read();
    void _clean_up();

public:
    ~code_6502_t();

    class operation_t : public kaitai::kstruct {

    public:

        operation_t(kaitai::kstream* p__io, code_6502_t* p__parent = 0, code_6502_t* p__root = 0);

    private:
        void _read();
        void _clean_up();

    public:
        ~operation_t();

    private:
        opcode_t m_code;
        uint16_t m_args;
        bool n_args;

    public:
        bool _is_null_args() { args(); return n_args; };

    private:
        code_6502_t* m__root;
        code_6502_t* m__parent;

    public:
        opcode_t code() const { return m_code; }
        uint16_t args() const { return m_args; }
        code_6502_t* _root() const { return m__root; }
        code_6502_t* _parent() const { return m__parent; }
    };

private:
    std::vector<operation_t*>* m_operations;
    code_6502_t* m__root;
    kaitai::kstruct* m__parent;

public:
    std::vector<operation_t*>* operations() const { return m_operations; }
    code_6502_t* _root() const { return m__root; }
    kaitai::kstruct* _parent() const { return m__parent; }
};

#endif  // CODE_6502_H_

code_6502.cpp

// This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild

#include "code_6502.h"

code_6502_t::code_6502_t(kaitai::kstream* p__io, kaitai::kstruct* p__parent, code_6502_t* p__root) : kaitai::kstruct(p__io) {
    m__parent = p__parent;
    m__root = this;
    m_operations = 0;

    try {
        _read();
    } catch(...) {
        _clean_up();
        throw;
    }
}

void code_6502_t::_read() {
    m_operations = new std::vector<operation_t*>();
    {
        int i = 0;
        while (!m__io->is_eof()) {
            m_operations->push_back(new operation_t(m__io, this, m__root));
            i++;
        }
    }
}

code_6502_t::~code_6502_t() {
    _clean_up();
}

void code_6502_t::_clean_up() {
    if (m_operations) {
        for (std::vector<operation_t*>::iterator it = m_operations->begin(); it != m_operations->end(); ++it) {
            delete *it;
        }
        delete m_operations; m_operations = 0;
    }
}

code_6502_t::operation_t::operation_t(kaitai::kstream* p__io, code_6502_t* p__parent, code_6502_t* p__root) : kaitai::kstruct(p__io) {
    m__parent = p__parent;
    m__root = p__root;

    try {
        _read();
    } catch(...) {
        _clean_up();
        throw;
    }
}

void code_6502_t::operation_t::_read() {
    m_code = static_cast<code_6502_t::opcode_t>(m__io->read_u1());
    n_args = true;
    switch (code()) {
    case code_6502_t::OPCODE_BCC_REL: {
        n_args = false;
        m_args = m__io->read_s1();
        break;
    }
    case code_6502_t::OPCODE_ORA_IND_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_LDA_IND_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CPX_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_STA_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_STA_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_BCS_REL: {
        n_args = false;
        m_args = m__io->read_s1();
        break;
    }
    case code_6502_t::OPCODE_LDY_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_LSR_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_AND_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_ADC_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_STA_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_BNE_REL: {
        n_args = false;
        m_args = m__io->read_s1();
        break;
    }
    case code_6502_t::OPCODE_LDA_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ADC_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_LSR_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_ADC_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_STA_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_CPX_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_JMP_IND: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_ADC_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_EOR_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_EOR_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_STA_X_IND: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_SBC_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CPY_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDX_ABS_Y: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_ADC_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_BPL_REL: {
        n_args = false;
        m_args = m__io->read_s1();
        break;
    }
    case code_6502_t::OPCODE_ORA_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ROR_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_ADC_IND_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_EOR_IND_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_LDA_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_BIT_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ROL_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_STY_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_JSR_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_EOR_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_EOR_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDA_ABS_Y: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDA_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_BMI_REL: {
        n_args = false;
        m_args = m__io->read_s1();
        break;
    }
    case code_6502_t::OPCODE_STY_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ADC_X_IND: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ROL_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_STX_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ASL_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LSR_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ORA_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ADC_ABS_Y: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDY_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_CMP_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDA_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_BVS_REL: {
        n_args = false;
        m_args = m__io->read_s1();
        break;
    }
    case code_6502_t::OPCODE_LDA_X_IND: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CMP_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_INC_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ASL_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_AND_ABS_Y: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDX_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_AND_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CPX_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_DEC_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ROR_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_LDX_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_DEC_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_SBC_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CMP_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_ROR_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_INC_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_AND_X_IND: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_SBC_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_ASL_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_EOR_X_IND: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ORA_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDY_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_SBC_X_IND: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ASL_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_SBC_ABS_Y: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_ROL_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LSR_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_STX_ZPG_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ORA_ABS_Y: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_EOR_ABS_Y: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_BIT_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDX_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDY_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_JMP_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_BEQ_REL: {
        n_args = false;
        m_args = m__io->read_s1();
        break;
    }
    case code_6502_t::OPCODE_DEC_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_AND_IND_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_AND_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CMP_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_EOR_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_SBC_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_CMP_ABS_Y: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_SBC_IND_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CMP_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_STX_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_STY_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_CPY_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_DEC_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_ROR_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_STA_ABS_Y: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_INC_ABS_X: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_LDA_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CMP_IND_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CPY_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_LDX_ZPG_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_SBC_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ORA_X_IND: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ROL_ZPG_X: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_ORA_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_STA_IND_Y: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_AND_ABS: {
        n_args = false;
        m_args = m__io->read_u2le();
        break;
    }
    case code_6502_t::OPCODE_AND_IMM: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_CMP_X_IND: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_LDY_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_INC_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    case code_6502_t::OPCODE_BVC_REL: {
        n_args = false;
        m_args = m__io->read_s1();
        break;
    }
    case code_6502_t::OPCODE_ORA_ZPG: {
        n_args = false;
        m_args = m__io->read_u1();
        break;
    }
    }
}

code_6502_t::operation_t::~operation_t() {
    _clean_up();
}

void code_6502_t::operation_t::_clean_up() {
    if (!n_args) {
    }
}