# Unofficial FUZIX images for pico and pico2

**URL:** <https://forum.clockworkpi.com/t/unofficial-fuzix-images-for-pico-and-pico2/16559>\
**Category:** PicoCalc\
**Tags:** firmware, source-code\
**Created:** [April 6, 2025, 12:06am UTC](https://forum.clockworkpi.com/t/unofficial-fuzix-images-for-pico-and-pico2/16559 "2025-04-06T00:06:23Z")\
**Posts on this page:** 1\
**Showing post:** 7

<div class="post-metadata">

**Author:** ![wez](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/wez/32/11557_2.png) [@wez](https://forum.clockworkpi.com/u/wez)\
**Post date:** [April 6, 2025, 1:48pm UTC](https://forum.clockworkpi.com/t/unofficial-fuzix-images-for-pico-and-pico2/16559/7 "2025-04-06T13:48:00Z")

</div>

The SD card that comes with the picocalc is pre-partitioned to include a FUZIX root partition in its last 32MB.

If you want to update that image, you can use `dd`. There’s a little bit about that in [GitHub - wez/FUZIX: FuzixOS: Because Small Is Beautiful](https://github.com/wez/FUZIX?tab=readme-ov-file#installation) and also in the picocalc SD readme docs, but the gist is shown below

**MAKE SURE to check which partition you are writing to with the command below, as you will DESTROY whatever is on that partition!**

```auto
$ sudo dd if=filesystem.img of=/dev/sdb2 oflag=direct bs=8192 status=progress

```

Please note that, until the most recent build from a few minutes ago, the filesystem image I was publishing in the releases section was a generic image. I switched that to one that is slightly more pico-friendly and that includes a utility that will reboot in flashing mode, which is more convenient than trying to press the bootsel button: `picoctl flash`.

So I recommend fetching the latest release zip before you flash the image, just to save an extra couple of steps later.

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