JTAGTest

JTAGTest is IEEE 1149.1 JTAG boundary scan debugging, testing and programming solution.

It's invaluable tool for all embedded designers, production houses and service companies. JTAGTest provides a significant aid for PCB debugging, prototyping, testing and repairing. Using an IEEE 1149.1 (JTAG) boundary-scan, device pin signals or internal signals can be monitored in real-time without interfering with the normal device operation and you can change pin state manually. The scan speed can be as high as allowed by your computer and the JTAG connection. Pin state view is provided in listing form or visual chip view:

Alternatively data can be stored during realtime boundary scan in memory and then viewed as on logical analyzer. All this via 4 JTAG wires:

JTAGTest is multiplatform! Both Microsoft Windows and Linux/Unix are supported!