I've tried with a CH340G USB-to-serial adapter and the serial programming cable.
However, this fails:
Reset Rabbit.
loaded 831 bytes from ../coldboot/coldload.bin
Sending initial loader.
Warning: Processor verification sequence failed!
sending 276 initial loader triplets
Error: Status line should be high after sending initial loader.
The error is the same no matter if the new tcdrain() or old usleep() approach is used in rabbit.c
I've tried with a CH340G USB-to-serial adapter and the serial programming cable.
However, this fails:
The error is the same no matter if the new tcdrain() or old usleep() approach is used in rabbit.c