One thing that didn’t make it in the blog post was that a strategically soldered wire shortened the JTAG chain to only include the 2 Intel chips
and bypass the AHA chips.
The power to the AHA chips gets cut off at some point, breaking the JTAG chain, but the FPGAs stay active.
One thing that didn’t make it in the blog post was that a strategically soldered wire shortened the JTAG chain to only include the 2 Intel chips and bypass the AHA chips.
The power to the AHA chips gets cut off at some point, breaking the JTAG chain, but the FPGAs stay active.
So by bypassing, you keep the chain alive.