Did anyone consider potentially porting some of the cool retroemulation projects that already run on Raspberry Pi pico hardware to the PicoCalc? Two that come to mind are PicoMac (GitHub - evansm7/pico-mac: Run the popular umac emulator right on your Pi Pico!) and Pico-ZxSpectrum (GitHub - fruit-bat/pico-zxspectrum: ZX Spectrum for Raspberry Pi Pico RP2040 and RP2350). There is so much potential on PicoCalc that it’s even hard to stay focused 
Flavio
I think it is possible but I am not sure if it will actually work. I asked the creator of ZXBaremulator, a ZX Spectrum emulator that runs on different versions of Raspberry Pi and it is almost like having a real working device, but unfortunately he replied that the model used for PicoCalc is not compatible. I am searching for other solutions and I am hoping that someone could eventually make this work properly. I also asked if another emulator called M.CU.M.E. would work on a PicoCalc. The response was that I would configure the firmware of the PicoCalc in order to make it work. Maybe in the future there will be a Raspberry Pi Pico ZX Spectrum bare emulator that will work on the PicoCalc.