Run your own code INSIDE your retro ROMs - introducing One ROM plugins

In this video I explain how you can run your own code within the most flexible replacement ROM for your retro systems, One ROM. Plugins run on One ROM's two spare ARM Cortex-M33 150MHz cores, in parallel with One ROM serving a ROM to the retro system. I demonstrate the blinky and live USB stack plugins, including what they do and how they were written, and show you how to get started with writing your own plugins. I also cover: How to monitor and modify One ROM live, while it's running, using the USB plugin and One ROM's new CLI. picobootx - an open source PICOBOOT implementation you can include in your own firmware, allowing it to be managed by tools like picotool and picoflash directly, without being in BOOTSEL mode. pico-sdkless - build projects like tinyusb for the RP2350 without needing the full Pico SDK. 🔗 *Links* Discord:   / discord   Buy: https://onerom.org/buy One ROM Plugin API: https://github.com/piersfinlayson/one... Picobootx: https://github.com/piersfinlayson/pic... Pico-sdkless: https://github.com/piersfinlayson/pic... picoflash: https://picoflash.org/ ⏰ *Timestamps* 00:00 Introduction 01:37 USB Plugin Video content copyright (c) 2026 piers.rocks Limited. All rights reserved.