Hacking the Xbox

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234 Hacking the Xbox: An Introduction to Reverse Engineering for download at their website) is comprehensive and clearly written, so it takes a lot of guesswork out of interpreting the design rules. They also do a fairly rigorous set of factory checks on your submitted design, which often catch subtle layout errors that can cause problems later. I have found their staff to be competent and friendly and, though their prices are slightly higher than most engineering prototype manufacturers, their well-documented process and design rule checks help reduce the risk of aggressive designs, and in the end the extra cost is probably worth it. Visit www.datacircuits.com. Advanced Circuits Advanced Circuits of Aurora, Colorado (www.4pcb.com) features an instant quotation feature at their website. This feature alone makes them a good choice for boards of intermediate-complexity that do not fit any of the discount, quick-turn process guidelines. You can use the instant quote feature to optimize your choice of implementation technology for price. In addition, they frequently offer discount, quick-turn specials. Alberta Printed Circuits Alberta Printed Circuits (AP Circuits), located in Alberta, Canada, is one of the original quick-turn prototype PCB houses, with prompt service. The P1 process they offer is a basic one, with no soldermask or silkscreen. As a result, it is difficult to execute fine-pitch surface mount designs because solder tends to get everywhere during the assembly phase. However, they will fabricate and ship your board in the P1 process in just one day for an unheard of price, with no minimum order requirements. The base fee for a production run is about $45 at the time of writing, with approximately a $0.65 per square inch charge on top of the base fee. The technology is an 8 mil trace/space with a minimum drill size of 20 mil (28 mil if you want to stick with the cheapest process option). AP Circuits is great for boards that have to get done in a pinch and on a strict budget, especially if you are using through-hole or coarse SMT components that are easy to assemble without a soldermask. Visit www.apcircuits.com. Starter Projects In Chapter 5, “Replacing a Broken Power Supply,” you are instructed on how to replace an Xbox power supply with a standard ATX power supply. The one problem is that the polarity of the power on signal is inverted between the Xbox and the standard ATX supply. The hack solution proposed in the chapter is to always leave the supply on, and to instead switch the Xbox on and off by first turning on the power supply and then pressing the Xbox’s power button.
Appendix C - Getting Into PCB Layout 235 It is fairly easy to design and layout a board that enables you to invert the polarity of the power signal so that you can control the power state of the Xbox from just the front panel of the Xbox. You can also properly regulate the standby power supply, instead of using two diodes. Such a board would consist of an inverter chip, such as the 74HCT04, and a regulator, such as the LM317K. The LM317K is an adjustable regulator that can be set to reduce the +5V standby voltage provided by the ATX supply down to the +3.3V standby voltage demanded by the Xbox. An example schematic diagram of this board is shown in Figure C-4. The choice of connectors to this board is up to you. The simplest solution would be to just use holes and solder the wires through the holes. There are only five connections on this board. Three go to the power supply: the +5VSB (violet) wire, a ground (black) wire, and the power on output (green) wire. The remaining two, +3.3VSB (pin 6 on the power connector) and power on input (pin 11 on the power connector), go to the Xbox. Be sure to test the voltage output of the regulator before installing your finished board. It is fairly easy to get a resistor value wrong or a pin swapped, and both of these conditions could lead to dangerously high voltages going into the Xbox. Also, when installing the board permanently, be sure to insulate the bottom and top of the board from accidental contact with the Xbox case or other Xbox components. Power On Signal from Xbox Motherboard (Pin 11 on Xbox power connector) +5.0V Standby From Power Supply (violet wire) Ground from Power Supply (black wire) C1 0.1uF, 10V 3 14 U2 74HCT04 1 2 7 U1 LM317T 2, Tab VIN VOUT ADJ 1 R1 240 1% R2 392 1% Power On Signal to Power Supply (green wire) +3.3V Standby To Xbox Motherboard C2 (Pin 6 on Xbox 10uF, 6.3V power connector) Figure C-4: Example schematic diagram of the ATX power supply replacement adapter board. Resistors R1 and R2 program the output voltage of the voltage regulator, U1, to be +3.3V.
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Hacking the Xbox An Introduction to
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The US government is far and away t
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Hacking the Xbox An Introduction to
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In memory of Aaron Swartz
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x Hacking the Xbox: An Introduction
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Acknowledgments I would like to tha
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CHAPTER 4 Building a USB Adapter Ca
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Strategy Chapter 4 - Building a USB
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Chapter 4 - Building a USB Adapter
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CHAPTER 5 Replacing a Broken Power
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CHAPTER 8 Reverse Engineering Xbox
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Chapter 8 - Reverse Engineering Xbo
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clearance for motherboard component
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CHAPTER 9 Sneaking in the Back Door
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Note Chapter 9 - Sneaking in the Ba
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CHAPTER 12 Caveat Hacker Reverse en
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Hacking the Xbox

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