The TX/TXRX functions used fixed ~1-2 KB stack buffers and rejected
anything larger, so any big shift failed: bscan_idle_cycles(10000) and
above all the ~19 Mbit bitstream load for the BSCAN proxy. Size the
pack/capture buffers to the shift on the heap instead.
This is what unblocked the proxy load — see next commit.
François
4d0637e997