HP41 TULIP4041 update

[MeindertKuipers]

Good luck building it, and let me know how it goes. Most of the orders are now on their way or have already arrived. For the Pico2, just pick the right webshop, after the initial wait I had no issues getting my hands on multiple units.
Remember that I do NOT recommend to solder the Pico2 to the PCB. Currently only versions without header are available, but please solder headers to the Pico and sockets on the PCB. Unsoldering the Pico is almost impossible in case of problems.
If you want to experiment with your own code I do recommend to solder a header to the debug interface and use a Pico Probe. I use this all the time and it is just one or two mouse clicks in VS Code to compile and run a new version without having to go into BOOTSEL mode.