The JTAG angle is unnecessary, and difficult to do in practice with this LGA70 chip face-down soldered onto the logic board.
It really means there is a Cortex-A (so lots of brunt) with a firmware update mechanism that has 1) direct access to the application processor RAM and 2) direct access to the plentiful permanent storage.
Comments
The JTAG angle is unnecessary, and difficult to do in practice with this LGA70 chip face-down soldered onto the logic board.
It really means there is a Cortex-A (so lots of brunt) with a firmware update mechanism that has 1) direct access to the application processor RAM and 2) direct access to the plentiful permanent storage.
He made a board so that he can do JTAG in-line. Not sure how else he could tell the processor to do something.
By flashing custom unverified firmware, of course.
Flashing custom unverified but somehow-signed-with-Apple's-secret-key firmware?