Hi @ Everyone!
I came to your Mainling list just ocasionally. Find this verry
interesting, if I had an X-BOX 360 I would immedialtey take out my
electronic stuff and start workling on it, but this isn't the Point.
I read that monitoring the Systems bus would help in hacking.
Slowing down the Bus speed should not be a great Problem.
Usualy for a Computer system there is one XTAL oscilator whitch generates
a reference Clock and the whole system relys on this. All other Clock's
are generated by using PLL's. So, slowing down this would also slow down
the hole System, without changing it's function.
All external devices such as HDD etc. could get inaccessible, as long as
they are not "syncronized" too.
DRAM might loose Data. On a normal PC System this could maybe be overcome
by changing the Data in the SPD-EEPROM an lowering the refresh times.
(don't know how RAM is implemented)
The procedure is limited by the oscillators used for the PLL's. They might
loose Syncronization if the Clock is chaged too much - at least if it is
changed too much initially - . A good Idea would probably be to attach a
Function Gerator instead of the XTAL, start with the nomial Frequncy and
then slow down till the PLL's can't follow anymore, I think 50% of Clock
decrease should be possible without problems.
Just exchanging the XTAL might not work (dependig on how the whole Thing
works), because PLL's are usually captable of folowing the ref Frequency
over a wide range as soon as they're locked on, but not to lock on on
Frequnecy's much different then the nominal, so the Frequncy might have to
be changed "slowly" while System is running.
Have a nice night!
Simon
-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems? Stop! Download the new AJAX search engine that makes
searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!
http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click
_______________________________________________
free60-devel mailing list
free60-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/free60-devel
