February 3, 2025 – Modern Replacement Parts

Marcel Erz, through his Retrostack github page, has put together a lot of modern replacements for TRS-80 Model I/III/4 parts, including motherboards, ROMs, character generators, and various plastic parts.

As of this posting, the site includes:

  • Model I:
    • Motherboards: Revision A, D, E, G
    • ROMs: Broken out into 2×64, 2×128, 2×256, and 2×512
    • Keyboards: ALPS and MX
    • Power Supply with 3-D Printable Enclosure
    • Mods: XRX-III
    • Adapters: Keyboard, ROM, and Character Generator
    • 3-D Printable Parts
  • Model III and 4:
    • Keyboard Adapter
    • 3-D Printable Parts

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