Matthew Lai

Thanks for the prompt responses! I got it running... I connect the JTAG-HS2 to the top row with a 6-pin header.

Yes I do use the integrated JTAG (the usb port) to upload the bitstream to the Nexys using Vivado already. The JTAG-HS2 is used to load the elf file through the openocd. [I'm just following the programming steps as specified in a commercial RISC-V vendor's FPGA guide.]

I'm trying to connect the JTAG-HS2 to Nexys A7 and wonder what is the recommended way to do it. Should I connect the JTAG-HS2 to a Pmod (eg. pmod JD) but not sure whether to use the top row or the bottom row of the pmod (the pmod is 2x6)? Or should I connect the JTAG-HS2 to the header J10 instead?