# Need some help on update my PicoCalc **URL:** \ **Category:** PicoCalc\ **Created:** [May 24, 2026, 4:57pm UTC](https://forum.clockworkpi.com/t/need-some-help-on-update-my-picocalc/22451 "2026-05-24T16:57:41Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![HolgerM](https://avatars.discourse-cdn.com/v4/letter/h/3ec8ea/32.png) [@HolgerM](https://forum.clockworkpi.com/u/HolgerM)\ **Post date:** [May 24, 2026, 4:57pm UTC](https://forum.clockworkpi.com/t/need-some-help-on-update-my-picocalc/22451/1 "2026-05-24T16:57:41Z")
Hello, I recently baught a PicoCalc in an Ebay auction. Its SD card still retains the old file structure, featuring the .bin files and the firmware directory. Now, I would like to replace the Pico with a Pico 2 W. I have already downloaded a file named “PicoCalc-553da6f2408963b956779599d179d77fd611a4d7.zip”. Inside this archive, specifically within the `Bin\PicoCalc SD` subdirectory, I found, among other things, the `pico1-apps` folder and the files `BOOT20240.uf2` and `bootloader_pico.uf2`. As far as I understand, all of this is intended for the Pico 1. I have also already located the corresponding files for the Pico 2 W: `BOOT2350.uf2` and `bootloader_pico2.uf2`. Now, here are my questions: - Which .uf2 file needs to be flashed directly onto the Pico 2 W via the BOOTSEL mode? - Where can I obtain the .uf2 files, that correspond to the files currently in the `pico1-apps` directory, which presumably need to be placed into a `pico2-apps` directory? Unfortunately, the relevant information available here is quite scattered, and I have not yet been able to find the answers to these specific questions. ---
**Author:** ![787Geoff](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/787geoff/32/12826_2.png) [@787Geoff](https://forum.clockworkpi.com/u/787Geoff)\ **Post date:** [May 24, 2026, 6:29pm UTC](https://forum.clockworkpi.com/t/need-some-help-on-update-my-picocalc/22451/2 "2026-05-24T18:29:15Z")
steps in a nutshell: use the stm cube programmer to upgrade keyboard to Bin 1.6 nuke flash your Pico 2 w flash your nuked Pico 2 w with correct .uf2 file SOFTWARE, FIRMWARE REQUIRED 1 download and instal STM Cube Programmer. - [https://www.st.com/en/development-tools/stm32cubeprog.html](https://www.st.com/en/development-tools/stm32cubeprog.html) 2 download from Geoff’s Projects the latest firmware. - [Geoff's Projects - BASIC Interpreter for the Raspberry Pi Pico](https://geoffg.net/picomite.html) - scroll down to the download box. the zip file contains uf2 files for various PICO chips. You will be looking for a 2350 file. 3 download nuke flash uf2 file. - [Release Version 1.1.0 - Pico SDK 2.2.0 · Gadgetoid/pico-universal-flash-nuke · GitHub](https://github.com/Gadgetoid/pico-universal-flash-nuke/releases/tag/v1.1.0) INSTALLING THE STM LATEST AND UF2. 1 watch this JBlank video, caveat newer firmware available for the STM keyboard. 1.6 not 1.2 as suggested. [Jblanked video](https://youtu.be/O-EXSRHOsfQ?si=Wer6JYV8ntcfEWpp) 2 follow instructions on the video and update the STM firmware. if this is not done, updating the UF2 file for the PICO 2W only, will result in a blank screen. 3 nuke flash your PICO 2 so it contains no conflicting code in preparation for the correct uf2 file. drag and drop. 4 select the correct uf2 file from the Geoff’s Project zip file that you unzipped ealier. it will be a 2350 file. drag and drop * * * now would someone please point this gentleman to the correct .UF2 file for the PICO 2 W. I used the base version as I only have the PICO 2. * * * ---
**Author:** ![HolgerM](https://avatars.discourse-cdn.com/v4/letter/h/3ec8ea/32.png) [@HolgerM](https://forum.clockworkpi.com/u/HolgerM)\ **Post date:** [May 26, 2026, 11:58am UTC](https://forum.clockworkpi.com/t/need-some-help-on-update-my-picocalc/22451/3 "2026-05-26T11:58:38Z")
I want to have multiboot with the pelrun bootloader. My steps: - Prepeared a new SD card with the following content: ```auto ls -la insgesamt 2788 drwxrwxr-x 9 holger holger 4096 Mai 25 17:48 . drwxrwxr-x 6 holger holger 4096 Mai 26 14:02 .. -rw-r--r-- 1 holger holger 2133632 Apr 2 04:20 BellLabs_Fine.mp3 -rw-r--r-- 1 holger holger 423 Apr 2 04:20 bifdiag.bas -rw-r--r-- 1 holger holger 92160 Apr 2 04:20 BOOT2040.uf2 -rw-r--r-- 1 holger holger 89600 Mai 25 17:47 BOOT2350.uf2 -rw-r--r-- 1 holger holger 14336 Mai 25 17:46 bootloader_pico2.uf2 -rw-r--r-- 1 holger holger 22016 Apr 2 04:20 bootloader_pico.uf2 drwxr-xr-x 3 holger holger 4096 Apr 2 04:20 cc -rw-r--r-- 1 holger holger 40976 Apr 2 04:20 Chessnovice_johnybot.nes -rw-r--r-- 1 holger holger 29696 Mai 25 17:48 diag_pico2.uf2 -rw-r--r-- 1 holger holger 30720 Mai 25 17:47 diag_pico.uf2 drwxr-xr-x 2 holger holger 4096 Apr 2 04:20 fonts -rw-r--r-- 1 holger holger 550 Apr 2 04:20 lorenz.bas drwxr-xr-x 2 holger holger 4096 Apr 2 04:20 lua -rw-r--r-- 1 holger holger 4598 Apr 2 04:20 MACHIKAP.INI -rw-r--r-- 1 holger holger 185 Apr 2 04:20 main.lua -rw-r--r-- 1 holger holger 847 Apr 2 04:20 mand.bas drwxr-xr-x 2 holger holger 4096 Apr 2 04:20 pico1-apps drwxrwxr-x 2 holger holger 4096 Mai 25 17:52 pico2-apps -rw-r--r-- 1 holger holger 307254 Apr 2 04:20 picocalc.bmp drwxr-xr-x 3 holger holger 4096 Apr 2 04:20 picoware -rw-r--r-- 1 holger holger 9610 Apr 2 04:20 README.md ``` - Updated STM32 following these instructions [https://github.com/jblanked/awesome-pico-calc/blob/master/GettingStarted.md](https://github.com/jblanked/awesome-pico-calc/blob/master/GettingStarted.md) - Checked my new pico 2W via the Arduino IDE with the blink example, works. - Pressed BOOTSEL on the Pico 2W and plugged it in again - Copied bootloader\_pico2.uf2 to the root directory of the mounted Pico 2W - Changed the Pico 1 in te PicoCalc to this new Pico 2W. - Changed the SD card with the prepared one. - Switched the PicoCalc on. Green LED is on but the screen keeps black, nothing happens. I then changed everything back and it’s working the old way. What’s wrong? \< ---
**Author:** ![HolgerM](https://avatars.discourse-cdn.com/v4/letter/h/3ec8ea/32.png) [@HolgerM](https://forum.clockworkpi.com/u/HolgerM)\ **Post date:** [May 28, 2026, 3:50pm UTC](https://forum.clockworkpi.com/t/need-some-help-on-update-my-picocalc/22451/4 "2026-05-28T15:50:53Z")
I’m a step further. Flashed the Pico 2W with universal\_flash\_nuke.uf2 first and then with bootloader\_pico2.uf2. I don’t know why but it boots into the select uf2 menu when holding the up button. - micropython\_pico2w.uf2 is starting on select and flashing but it is rather empty. - PicoCalc\_Fuzix\_v1.1\_pico2.uf2 is missing the root partition allthough I made a SD card with a big fat32 partition as first partition and a small linux partition as a second. - PicoCalc\_NES\_v1.0\_pico2.uf2 is booting and shows Chessnovice\_johnybot.nes in a choice menu but that’s not working. It behaves like the original PICO 1 so no progress. - None of the MMBASIC versions under [Releases · madcock/PicoMiteAllVersions · GitHub](https://github.com/madcock/PicoMiteAllVersions/releases) is working. It shows a black screen on the PicoCalc. Now I found a thread in the forum regarding this topic. The uf2 file from [Releases · pelrun/PicoMiteAllVersions · GitHub](https://github.com/pelrun/PicoMiteAllVersions/releases) is working. What do you need to keep in mind when compiling UF2 files yourself and using the Pico 2W with the pelrun bootloader? What does the FUZIX use as the root partition? ---
**Author:** ![tabemann](https://avatars.discourse-cdn.com/v4/letter/t/df705f/32.png) [@tabemann](https://forum.clockworkpi.com/u/tabemann)\ **Post date:** [May 28, 2026, 7:27pm UTC](https://forum.clockworkpi.com/t/need-some-help-on-update-my-picocalc/22451/5 "2026-05-28T19:27:58Z")
FUZIX uses its own filesystem format. You may want to get ahold of the FUZIX source with the necessary PicoCalc patching and start from there, to properly initialize a FUZIX filesystem. ---
**Author:** ![HolgerM](https://avatars.discourse-cdn.com/v4/letter/h/3ec8ea/32.png) [@HolgerM](https://forum.clockworkpi.com/u/HolgerM)\ **Post date:** [May 29, 2026, 3:12pm UTC](https://forum.clockworkpi.com/t/need-some-help-on-update-my-picocalc/22451/6 "2026-05-29T15:12:14Z")
Finally I got FUZIX up and running following these instructions: [GitHub - wez/FUZIX: FuzixOS: Because Small Is Beautiful · GitHub](https://github.com/wez/FUZIX/tree/picocalc) I still struggle with the Micropython. This [GitHub - zenodante/PicoCalc-micropython-driver · GitHub](https://github.com/zenodante/PicoCalc-micropython-driver) isn’t working. I have a Micropython which is starting but it has no examples etc. ---
**Author:** ![pelrun](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/pelrun/32/12323_2.png) [@pelrun](https://forum.clockworkpi.com/u/pelrun)\ **Post date:** [June 4, 2026, 2:01pm UTC](https://forum.clockworkpi.com/t/need-some-help-on-update-my-picocalc/22451/7 "2026-06-04T14:01:25Z")
The core philosophy of uf2loader is to almost never have to think about uf2loader when making a picocalc app. If you can flash it directly to the pico you “should” be able to use it directly with uf2loader. Unfortunately a few of the most popular applications take control of flash in ways that uf2loader can’t control, and therefore conflict or need changes. Micropython and PicoMite are in this category. (I have a list at [Applications that need patching · Issue #6 · pelrun/uf2loader · GitHub](https://github.com/pelrun/uf2loader/issues/6) ) Practically everything else should just work. ---
**Author:** ![tabemann](https://avatars.discourse-cdn.com/v4/letter/t/df705f/32.png) [@tabemann](https://forum.clockworkpi.com/u/tabemann)\ **Post date:** [June 4, 2026, 4:45pm UTC](https://forum.clockworkpi.com/t/need-some-help-on-update-my-picocalc/22451/8 "2026-06-04T16:45:16Z")
zeptoforth currently does not support uf2loader, and I am waiting on @cathiele to add the capability for it to properly autodetect partition sizes to his pull request before I merge it in so zeptoforth will support uf2loader.