There was a separate blog post about acquiring the parts: https://ezcontents.org/atari-800xl-bill-materials-bom https://ezcontents.org/atari-800xl-bill-materia

There was a separate blog post about acquiring the parts: https://ezcontents.org/atari-800xl-bill-materials-bom https://ezcontents.org/atari-800xl-bill-materials-bom Mirror: https://web.archive.org/web/20201122190319/https://ezcontents.org/atari-800xl-bill-materials-bom https://web.archive.org/web/20201122190319/https://ezcontent... It looks like they pulled a few components from other systems, like a Atari 2600 Junior.