Bruce Boettjer wrote:
Just a quick note to introduce myself and say 'Hi' to folks already here.
It is my understanding that the '360 uses 970FX cores licensed from IBM. I
designed and implemented IBM's reference design for the 970FX (Maple)
[<SNIP>]
Hello Bruce, thanks for stopping by. Previous experience with this chipset
cannot hurt. My understanding is that the XBOX360's cores are custom, but I
would imagine that the changes were as minimal as possible, to save both
engineering and debugging time.
Since most of us know very little about the internals of the core
processors, can you give us a basic overview of the boot process? Details
like where code execution starts and how interrupts vectors are located can
be of great assistance. I'm also interested to find out whether this
processor has an integrated MMU and, if so, what its capabilities are. I
believe there is a version of linux built for platforms not supporting
virtual memory, but most standard versions rely on paging hardware for a
number of features.
Again, thanks for any details that you can provide.
Segin wrote:
Who cares for NDAs? We'll just pretend we got it from an "outside source"
;)
Reverse Engineering is a fact of life. Another fact is that businesses
invest money bringing a product to market in the hope that it will make more
money than it cost to develop. R.E. virtually garantees that the lifetime
of a product is fairly short (18 months at best). Businesses *must* make
every effort to protect the investment for as long as possible. I can
single handedly ruin a products chances of success by leaking detailed
designs and/or prototypes at the right time.
I like the open source model. I think its a brave way to go about doing
your business...the extension of the "publish or parish" methodology from
most universities. However, that isn't the only valid way.
I only bring this up because when someone like Bruce offers to help with a
project like this it can be somewhat intimidating. It is difficult
separating the protected information from the unprotected information. It
is worse when he feels like any slip up will be taken advantage of without
any regard to his career.
So, the point is this: comments like "Who cares for NDAs?" are just like
saying "Who cares about your career?"
Is that really what you wanted to say to Bruce after such a kind offer of
assistance?
-SpeedBump
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