DD2 to DD1

Note  This page is intended for advanced technicians only. If you do not have advanced component and BGA rework skills, you will not be able to complete the process successfully.

The Waternoose DD1 CPU can be installed onto a final Xenon Fab K (X803600-011) motherboard. A Titan card is required to start the system.

These instructions are not from Microsoft and were created by Octal450 via reverse engineering. (Demo Video)

Install CPU

• Replace DD2 U7D1 with DD1

CPU Strapping

• Remove 100 ohm 0402 R7F4
• Remove 10K ohm 0402 R7R7
• Install 10K ohm 0402 R7F3
• Install 10K ohm 0402 R7R8

Set CPU VID

• Remove 10K ohm 0402 R7T13
• Install 10K ohm 0402 R7T6

Install V_CPUPLL Regulator

• Remove 0 ohm 0805 R5C4
• Remove 0 ohm 0805 R6C1
• Install 0.1uF 6.3V 0402 C6R1
• Install 0 ohm 0805 R5C6
• Install 374 ohm 0402 R6R2
• Install 499 ohm 0402 R6R3
• Install NCP1117STAT3G U6R1

CPU JTAG Header

• Install header J8C1
• Install 10K ohm 0402 R8C3
• Install 10K ohm 0402 R8C4
• Install 10K ohm 0402 R8C5
• Install 10K ohm 0402 R8C6

SMC Strapping

• Install 2K ohm 0402 R2B18

64MB Nand Conversion

• Remove 10K ohm 0402 R2D5
• Install 10K ohm 0402 R2D6
• Install K9F1208U0B or K9F1208U0C U2E1

Titan Power

• Wire from FB5G1 south side to Titan J_GPUL pin 12

Firmware

• Use J-Runner with Extras to write a DD1 compatible nand
• Ensure Titan is running V2.11 or later and switches are set to OFF - OFF - ON - OFF