Hardware Hacking
I work in computational number theory, which means I occasionally build hardware.
JTAG
JTAG (IEEE 1149.1) is a serial interface for testing devices with integrated circuits. Briefly, it's a magical technology that you design into ever input/output port of every device you design at the hardware level, letting you read/write to each of them. This makes in-circuit testing possible, and serves as an easy way to reprogram custom logic.
JTAG Links
- UrJTAG— The long-awaited fork of the OpenWINCE jtag toolset. Aimed at all JTAG cable types, but started life favouring parallel-based cables.
- OpenOCD— open on-chip debugger software aimed at USB-based JTAG cables.
- A budget homebrew USB JTAG cable.
- Schematics for many other JTAG Cables
- Free JTAG resources