picoZ80 / pico6502 — NOTICE
============================

Copyright (c) 2019-2026 Philip Smart <info@eaw.app>
https://eaw.app


1. Attribution Requirements
---------------------------
If you redistribute, display, or build upon any part of this project
you MUST:

  a) Retain this NOTICE file and all copyright headers in their
     entirety in every copy or substantial portion of the work.

  b) Clearly and prominently credit "Philip Smart" and "engineers@work
     (eaw.app)" as the original author and project, with a link to
     https://eaw.app in any accompanying documentation, README, web
     page, or "About" screen.

  c) If you have modified the work, clearly state what changes you made
     and that your version is a modified derivative — not the original
     picoZ80 or pico6502 project.

  d) You may NOT imply that the original author endorses you, your
     organisation, or your derivative work without explicit written
     permission.


2. Trademark and Name Protection
---------------------------------
The following names and marks are trademarks of Philip Smart and may
NOT be used without prior written permission:

  - picoZ80
  - pico6502
  - engineers@work
  - eaw.app
  - The picoZ80 and pico6502 logos and board silkscreen artwork

You may use these names solely to accurately describe the origin of
the work (e.g., "based on the picoZ80 project by Philip Smart") but
you may NOT:

  a) Use "picoZ80", "pico6502", or any confusingly similar name as
     the name of a derivative product, fork, or commercial offering.

  b) Remove, obscure, or alter the project name, author attribution,
     or copyright notices on the PCB silkscreen, in the firmware
     boot/splash screen, or in the web interface.

  c) Present a copy, fork, or derivative as if it were the original
     project or your own original creation.


3. Anti-Passing-Off
--------------------
You may NOT:

  a) Claim authorship of this work or represent it as your own original
     creation.

  b) Re-brand this project or any substantial portion of it under a
     different name and present it as a new or independent project.

  c) Remove or alter authorship information, version strings, copyright
     notices, licence headers, or boot/splash screen credits.

  d) Publish this work or derivatives on any repository, marketplace,
     or platform in a way that misrepresents the origin, authorship,
     or licensing of the project.

Any of the above constitutes passing off and is a violation of both
the applicable licence terms and the moral rights of the author.


4. Non-Commercial Use
---------------------
The hardware designs in this project are licensed under CC BY-NC-SA 4.0.
"NonCommercial" means you may NOT use the hardware designs for
commercial advantage or monetary compensation without the prior written
permission of the copyright holder. Specifically:

  - You MAY build boards for your own personal use.
  - You MAY build boards for use within your club, hackerspace,
    or educational institution (provided no profit is made).
  - You MAY share your modifications under the same licence terms.
  - You may NOT manufacture boards for sale.
  - You may NOT sell kits, assembled boards, or products derived from
    these designs.
  - You may NOT include these designs in a commercial product.

If you wish to manufacture or sell picoZ80 or pico6502 hardware, or
incorporate the designs into a commercial product, please contact the
author to arrange a commercial licence:

  Philip Smart <info@eaw.app>


5. Firmware Copyleft (GPL v3)
-----------------------------
The firmware source code is licensed under the GNU General Public
License v3. This means:

  - You must make your source code available if you distribute binaries.
  - Any modifications you distribute must also be licensed under GPL v3.
  - You must preserve all copyright notices and licence headers.
  - The GPL v3 does permit commercial use of the software, but note
    that the hardware required to run it is under the non-commercial
    CC BY-NC-SA 4.0 licence.


6. Third-Party Components
-------------------------
This project includes the following third-party components which are
copyright their respective authors:

  Z80 CPU emulator library
    Copyright (c) 1999-2024 Manuel Sainz de Baranda y Goñi
    Licensed under GNU GPL v3
    https://github.com/redcode/Z80

  Raspberry Pi Pico SDK
    Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
    Licensed under BSD 3-Clause

  TinyUSB
    Copyright (c) 2018 hathach (tinyusb.org)
    Licensed under MIT

  cJSON
    Copyright (c) 2009-2017 Dave Gamble and cJSON contributors
    Licensed under MIT

  ESP-IDF
    Copyright (c) 2016-2024 Espressif Systems (Shanghai) Co. Ltd.
    Licensed under Apache License 2.0


7. Contact
----------
For commercial licensing, permissions, or any questions:

  Philip Smart
  Email: info@eaw.app
  Web:   https://eaw.app
  Git:   https://git.eaw.app/eaw/pico
