This text appears to be documentation or comments from the Marlin open-source firmware project for RepRap 3D printers.

The main points covered in this section are:

1. Building Marlin for a specific board: The user must set the MOTHERBOARD option in Configuration.h to select their printer's hardware configuration.

2. Customizing settings: Depending on the board, additional customizations may be required through PlatformIO or other build tools. Some boards share files with related models.

Specifically mentioned topics include:

* Assigning pins for extra axes (e.g., Z-axis) and endstops

* Using Board Pins documentation for more detailed information

The text also mentions several important Marlin source code files that provide hardware support, including:

1. `boards.txt`: Contains the full list of supported boards.

2. The Hardware Abstraction Layer: This is a layer between firmware components and specific board-specific implementation details.

Key points about these changes include:

* Improved compatibility with newer platforms (ARM-based boards) beyond original AVR-focused design

* Enhanced support for various 3D printers, including all RAMPS variants

Overall, this documentation aims to guide users through the process of setting up Marlin on their specific printer's hardware.

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