Here are 2 JTAG adapters for D-DAQ.

For those with an ARM 20-pin cable

For those with a MIPS 14-pin cable

Since I'm putting neither a 20-pin or 14-pin receptacle on the mainboard, an adapter is required. As long as your JTAG tool speaks PIC32/MIPS 4K, these should work for you. For the pins, I'm using Mill Max's 9976 series pins that have an insertion  diameter of 0.018" or 0.46 mm. I've chosen this route to keep the mainboard's layout compact, simple, and to lessen routing complexity.