Timing Attack Confirmed Working after Fall Update

Via xbox scene

Ivc confirmed on the XBH forums that he managed to perform the Timing Attack on kernel 6683 (fall 07 update) and boot back into kernel 1888:

The timing attack works on the fall update!
I just downgraded a machine with the latest 6683 kernel to 1888 using the PIC timing attack. The CB/CD sections didn't change after the update and is still 1920 after the update. This might suggest CB 1888/1903/1920 on current machines can't be changed/updated, and a newer CB can only be applied to new machines from the factory/rma.

To verify that machines with CB/CD 1888 and CE/CF 6683 could be downgraded, I ran a timing attack on another machine I had and it booted 1888 after timing attacking it for an hour. Both runs was done on Xenon (initial) motherboards.

Yes, the fuse resistor [R6T3] is in place on both machines. No major problems encountered on either machines after the update and downgrade.

Geremia posted some details about the changes he found in the new kernel:

On my early 2006 console, with R6T3 resistor removed, i see only changes in the kernel+filesystem (as usual) and probably an updated consoleravocationlist, and a few bytes increased at quite end of nand @0xFF3C00, don't know, probably some settings, don't know.
No changes in KV and in CB,CD,CE (still 1888), so games are still open