Hacking the Xbox

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258 Hacking the Xbox: An Introduction to Reverse Engineering Wire Color Description +12V Yellow GND Black GND Black +5V Red Table F-2: Hard disk power connector pinouts. Video Connector Pinout The video connector pinout is a little bit of a mystery because some of its signals show no obvious or recognizable signal patterns when probed, and because multiple display modes are supported by a single connector. There are a few websites that post pinouts for the video connector, but crosschecking the posted information with measurements reveals some discrepancies. I have done my best here to piece together and reconcile two separate postings from the XboxHacker BBS and the ucon64 web page at Sourceforge.net. The original postings can be found at http:// www.xboxhacker.net/index.php?do=article&id=10&page=1 and at http://ucon64.sourceforge.net/ucon64misc/ conn.html. The definition of all eight video modes selectable by the MODE1-3 signals is listed on the XboxHacker BBS web page. My measurements indicate that all of the composite video and audio signal mappings are correct, but I was unable to verify the SDTV, HDTV, and RGB mappings as given by the Xboxhacker BBS posting. I apologize in advance if any of these signals are incorrect. Note that pins 12 and 24 have longer pins on the Xbox’s connector, which indicate that they are used to supply power to peripherals attached to the video connector during hot-insertion events. The longer pins allow a peripheral’s circuitry to power up before receiving signals in the event that the peripheral is connected while the Xbox is powered on. This helps prevent a potentially destructive situation inside the peripheral’s chips called latch-up. 12 13 24 Figure F-1: Xbox audio-video connector, as viewed while looking at the Xbox back panel from the outside. 1
Appendix F - Xbox Hardware Reference 259 Pin Signal Name I/O Comment 1 Right Audio Out Audio out, right channel 2 GND Power 3 SPDIF Out Sony/Philips Digital Interface (S/PDIF) audio output 4 VSYNC Out Vertical Sync (VGA output mode) 5 GND Power 6 GND Power 7 GND Power 8 GND Power 9 Pb / B Out Pb for HDTV mode, Blue for RGB mode 10 GND Power 11 Y / G Out Y in SDTV and HDTV modes, Green in RGB mode 12 GND Power Has longer pins for hot-insertion 13 CVIDEO Out Composite video out. 14 GND Power 15 C / Pr / R Out C in SDTV, Pr in HDTV, Red in RGB mode 16 GND Power STATUS Out SCART (Syndicat des Constructeurs d'Appareils Radio 17 Récepteurs et Téléviseurs) status pin 18 MODE3 In Video output mode select pin 3 19 MODE2 In Video output mode select pin 2 20 MODE1 In Video output mode select pin 1 21 HSYNC Out Horizontal Sync (VGA output mode) 22 GND Power Left channel audio cable shield 23 Left Audio Out Audio out, left channel 24 +5V Power +5V power, has longer pins for hot-insertion Table F-3: Video connector pinouts. The pin numbering used by Table F-3 for the Xbox video connector is illustrated in Figure F-1. Both the Xboxhacker-derived pinout and the ucon64-derived pinouts disagree in terms of their numbering scheme, so I chose a number scheme that is somewhere in between the two. Interestingly, pin 24 in Figure F-1 is mapped to a square pad on the Xbox video connector, indicating that the numbering scheme I chose to give the connector here is not consistent with the manufacturer’s numbering scheme (square pads typically indicate pin 1, while round pads indicate all other pins). This should not effect the correctness of the table, as pin numbering schemes are arbitrary and only need to be consistent with the pin definition table.
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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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xii Hacking the Xbox: An Introducti
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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 5 - Replacing a Broken Powe
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Strategy Chapter 5 - Replacing a Br
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Figure 5-6: The final cable assembl
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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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Chapter 9 - Sneaking in the Back Do
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Note Chapter 9 - Sneaking in the Ba
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CHAPTER 11 Developing Software for
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CHAPTER 12 Caveat Hacker Reverse en
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Chapter 12 - Caveat Hacker 191 his
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Page 281 and 282: DVD-ROM Power Connector Appendix F
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Hacking the Xbox

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