I previously mentioned dumping memory contents using SPI, with a BusPirate. Sometimes that’s not feasible – such as if the flash memory module is a little inaccessible and you’re not feeling like deconstructing the board just yet.
An alternative is to pull memory over JTAG. I talked about accessing JTAG and interacting with a chip using OpenOCD previously, however this time around I’d like to go a step further.
The board I’m using in this example is a Netgear DG834Gv1, which has an exposed JTAG, shown below on the bottom right of the board (in red):