I already have a hacked-together working port of the “DirtyJTAG” project (no relation), but someone sent this via twitter. Looks like there will be a full week of JTAG fun soon:
This PicoLink, I didn’t know about it, seems interesting.
However, to debug you can use a regular Raspberry PI Pico with debug firmware as described by @ian here:
Or buy a Pico Probe Debug (for 13 Euro):
You can try the firmware on your bus pirate soon
i believe this firmware works with more chips than dirty JTAG.
but someone sent this via twitter.