On Sun, Jan 16, 2011 at 02:41:57PM -0500, erik quanstrom wrote: > i haven't cracked the case. does anyone know if there's > a jtag port at all in a sheevaplug?
There is. I've used it to debug Linux boots with openocd. The FTDI chip at the the USB-device connector should show you two serial ports. One for the console, and the other for the JTAG.
