On http://www-128.ibm.com/developerworks/powe...lnxw06XBoxStory there is talk of a a POST monitor, did someone already take a look at the extra connections next to the cpu?
On most routers there is a debug serial port right out of the processor, there's only a level converter chip between it (max232) if even connected (have a router running linux with usb for €25,-!!), maby this is the same?
There's even talk of a j-tag port, used for taking complete control of a unit.
I only hope that those fuses they talk about in the article arent blown and the processor microcode is the same as the debug boxes.
Hopefully someone will have the balls to take a look...