AMD: Secret Undocumented Debugger In Chips

[zen at freedbms.net (Zenaan Harkness)]

On Thu, Mar 23, 2017 at 07:06:26PM -0400, grarpamp wrote:
> https://www.theregister.co.uk/2010/11/15/amd_secret_debugger/

Intros for those who don't know their ring-zeros from the OCDs:

http://hackaday.com/2012/09/27/beginners-look-at-on-chip-debugging/

http://www.embedded.com/electronics-blogs/beginner-s-corner/4024528/Introduction-to-On-Chip-Debug

http://www.embeddedintel.com/technology_applications.php?article=54


Why would AMD hide such a useful feature?

Surely such hiding could have nothing to do with the NSA's global data
collection activities or the CIAs global computer hackfest?

Surely not?