Add Jtag Port
From NAS-Central Buffalo - The Linkstation Wiki
This document is a work in progress. It explains how to fit the internal on-chip debug (OCD) port on a Linkstation, Kuro-Box or Kuro-Box/HG to a PC interface.
Cable required: 
Contents |
OCD connector
The internal OCD port uses an electrical standard known as JTAG/COP. The signals have to be buffered to protect the hardware from damage and we use a JTAG wiggler to do this.
Those with some electrical experience could build their own circuit, but most will opt for ordering one.
Schematics and Software to build your own
http://hri.sourceforge.net/tools/
Buy one
Commercial The Wiggler seems to be the cheapest at $150.
Hobby Could the 20-pin ARM-JTAG be modified to work with Kuro-Box? $20.
Locate the pads
The pads are labelled CN5: 
Connector Pin-outs
In order to use this port, you should add the 10K series VIO resistor R67 and a 4-way 1K resistor pack at RA11. It may be possible to use some functionality without these components.
If you know which set of pin-outs that LinkStation/Kuro-Box uses, please update this page with the details.
