HDCP is unrelated to the CEC bus. CEC is completely separate and unencrypted. The pulse-eight adapter, AFAIK, should just be a female-female connector with two

HDCP is unrelated to the CEC bus. CEC is completely separate and unencrypted. The pulse-eight adapter, AFAIK, should just be a female-female connector with two pins plugged into a microcontroller. I've toyed with the idea of replicating its functionality on an Arduino, but ended up just buying the adapter :) In the end, I'm not sure how doable it is, but it shouldn't be too complex. Licensing is another matter. I'm at a loss as to why GPU makers don't wire it up though.