README

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This package provides NES cartridge-related functionality, handling game ROM data loading and memory mapping for a NES emulator.

Features

• Support for standard iNES and NES2.0 format ROM file parsing
• Memory structure management for cartridge data
• ROM data loading and processing
• Integration with the mapper module (nes-mappers)
• Support for battery-backed SRAM management

Installation

Install via Composer:

composer require nes/cartridge

Basic Usage

// Load ROM from file
$cartridge = CartridgeFactory::createFromFile('/path/to/game.nes');

// Get mapper type
$mapperType = $cartridge->getMapperType();

// Get PRG-ROM data
$prgRomData = $cartridge->getPrgRomData();

// Get CHR-ROM data
$chrRomData = $cartridge->getChrRomData();

// Reset cartridge state
$cartridge->reset();

Integration with Mapper Module

This package is designed to work with the nes-mappers package:

// Cartridge and mapper integration example
$cartridge = CartridgeFactory::createFromFile('/path/to/game.nes');
$mapper = MapperFactory::create($cartridge->getMapperType(), $cartridge);

// CPU read (through mapper)
$data = $mapper->cpuRead(0x8000);

// PPU read (through mapper)
$patternData = $mapper->ppuRead(0x0000);

Architecture

The module uses a layered design:

1. Interface Layer - Defines standard interfaces for interaction with other modules
2. Core Layer - Provides core cartridge implementation
3. Functional Layer - Implements ROM header parsing, memory management, etc.
4. Factory Layer - Provides factory classes for creating cartridge instances
5. Loader Layer - Handles file IO and ROM data loading

Contributing

Contributions are welcome. Please ensure you add appropriate tests before submitting PRs.

License

MIT License