eiselekd

Enable DCI debugging on Gigabyte-BKi5HA-7200
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The Gigabyte-BKi5HA-7200 (Kabylake i5-7200 processor) can be debugged with only a USB debug cable, a
special cable that crosses only the data signals and has the power signals
removed. You can buy these cables at i.e. https://www.datapro.net/products/usb-3-0-super-speed-a-a-debugging-cable.html
The hurdle you have to overcome  before you can access DCI however is that you
need to set some bits in hardware that first enable DCI and also enable the debug port so that DCI can control the cores.
There are lots of guides in howto patch the BIOS but only these two really describes all the steps using only freely accessible tools:

akumpf

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