X-Box 360 kernel downgrade timing attack PIC interface details
Downloads: Schematic / PIC BootLoader / PIC Binary / Documentation
The timing attack is working well now, the software has been released for testing and if no major problems are found then it will be available at the end of the week. The first release will require an Infectus modchip and a "home made" PIC interface. I thought I would release the details of the PIC today to give people a chance to order parts, build and test the hardware.
Parts List:
IC1 LM339
IC2 LM339
IC3 74HC08
IC4 PIC16F876A 20MHz
IC5 MAX232 or equivalent
1 * LED
1 * 20MHz Crystal
16 * 1K 0.25W 5%
1 * 10K 0.25W 5%
1 * 680R 0.25W 5%
1 * 330R 0.25W 5%
1 * 5K6 0.25W 5%
2 * 22pF Ceramic Cap
9 * 100nF Ceramic Cap
Please note, 100nF decoupling caps across every ICs power supply pins seems to reduce the noise on the power supply and VRef lines. Reduced noise = Less jitter in the timing measurements which is a good thing
Tomorrow I will release the tool that will build downgradable flash images. Hopefully by then the 2.0.1888 file set will be available in "the usual places".
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