mre-mos6502/examples/mos6502.rs

// Copyright (C) 2014 The 6502-rs Developers
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
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// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
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// 3. Neither the names of the copyright holders nor the names of any
//    contributors may be used to endorse or promote products derived from this
//    software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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extern crate mos6502;

#[cfg(not(test))]
use mos6502::cpu;
use mos6502::memory::Bus;
use mos6502::memory::Memory;

#[cfg(not(test))]
fn main() {
    let mut cpu = cpu::CPU::new(Memory::new());

    // "Load" a program

    let zero_page_data = [
        // ZeroPage data start
        0x00, 0x02, // ADC ZeroPage target
        0x00, 0x04, // ADC ZeroPageX target
        0x00, 0x00, 0x00, 0x00, 0x10, // ADC IndexedIndirectX address
        0x80, // ADC IndexedIndirectX address
        0x00, 0x00, 0x00, 0x00, 0x00, 0x08, // ADC IndirectIndexedY address
        0x80, // ADC IndirectIndexedY address
    ];

    let program = [
        // Code start
        0xA9, // LDA Immediate
        0x01, //     Immediate operand
        0x69, // ADC Immediate
        0x07, //     Immediate operand
        0x65, // ADC ZeroPage
        0x01, //     ZeroPage operand
        0xA2, // LDX Immediate
        0x01, //     Immediate operand
        0x75, // ADC ZeroPageX
        0x02, //     ZeroPageX operand
        0x6D, // ADC Absolute
        0x01, //     Absolute operand
        0x80, //     Absolute operand
        0xA2, // LDX immediate
        0x08, //     Immediate operand
        0x7D, // ADC AbsoluteX
        0x00, //     AbsoluteX operand
        0x80, //     AbsoluteX operand
        0xA0, // LDY immediate
        0x04, //     Immediate operand
        0x79, // ADC AbsoluteY
        0x00, //     AbsoluteY operand
        0x80, //     AbsoluteY operand
        0xA2, // LDX immediate
        0x05, //     Immediate operand
        0x61, // ADC IndexedIndirectX
        0x03, //     IndexedIndirectX operand
        0xA0, // LDY immediate
        0x10, //     Immediate operand
        0x71, // ADC IndirectIndexedY
        0x0F, //     IndirectIndexedY operand
        0xEA, // NOP :)
        0xFF, // Something invalid -- the end!
    ];

    let data = [
        0x00, 0x09, // ADC Absolute target
        0x00, 0x00, 0x40, // ADC AbsoluteY target
        0x00, 0x00, 0x00, 0x11, // ADC AbsoluteX target
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, // ADC IndexedIndirectX target
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, // ADC IndirectIndexedY target
    ];

    cpu.memory.set_bytes(0x0000, &zero_page_data);
    cpu.memory.set_bytes(0x4000, &program);
    cpu.memory.set_bytes(0x8000, &data);

    cpu.registers.program_counter = 0x4000;

    cpu.run();

    println!("{:?}", cpu);
}