Unless you're using Linux on a virtual machine, installing the open-source OS is usually done via a USB drive. Because of this, you can burn an ISO to a USB drive, reboot the system, boot into the USB ...
There is also an alternative ps2pico firmware for the PC-XT and ps2x2pico hardware: ps2pico-XT-alt.uf2 ⚠️ Do not assume wire colors will match cables depicted in photos. Double-check your pinout with ...