I've been working on a software security project and am using Intel's XDP to debug a CPU. After having read through the spec. for the debug port, there's a point that says XDP Detect Circuit. What exactly is that? I can't find a reference to it anywhere else.
Or, on the other hand, is there any model-specific register or flag set somewhere on the CPU that allows one to detect the presence of a device connected to the XDP?
Any help would be extremely appreciated. At the very least, if anyone knows a proper source or forum where I could ask this question, I would also be very grateful.