MakeMHz XboxHD+v2 Project Stellar

Xbox Revision
Regular price $140.00 USD
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Coupon codes may be disabled for some pre-order and exclusive items. Pre-order ship dates are estimates and subject to change. Orders are estimated ship date of mid-June 2023 *the above mentioned date is not a promise, it's an estimate based on manufacturing times with an allowance of time for international and domestic shipping.

Project Stellar

StellarOS is the first completely legal re-implementation of the retail Xbox BIOS. Built from the ground up using modern tooling, StellarOS was designed to take full advantage of the additional 8MB of SDRAM on board Project Stellar. On boot the kernel is dynamically recompiled using modules of the re-implemented kernel targeting the user's hardware setup and ones for the enabled features.

With this approach StellarOS can load in any number of additional modules at will while not using up any additional system RAM. 

On board Project Stellar is a modern and top-of-its-class FPGA that fully implements the memory interface used for the BIOS, as well as the complete LPC interface for I/O and DMA transactions.

But what does all of this mean? By fully implementing the LPC interface, we can give the system access to an additional 8MB of SDRAM plus 16MB of static RAM (all of which is MMU mapped as virtual system memory, CPU cache-able, and usable by the kernel) along with two ARM CPU cores that can be used for off-loading tasks from the Xbox's CPU.

Additionally, we've added an OLED screen for troubleshooting/error-code readouts, a MicroSD card slot for loading alternative BIOSes (Legacy BIOSes, non-StellarOS), three expansion connections for future add-ons, and USB-C connection for firmware recovery and kernel debugging. 


  • Built-in tools for system troubleshooting, configuration, hard-drive setup, etc.
  • Automatic network based system updating.
  • Kernel level ODE. (ISO Loading)
  • Compressed ISO Loading. (CISO)
  • Additional controller support. (Xbox One)
  • Network loading of ISOs and virtual HDD images.
  • Titan+ support. Supports legacy configured drives and Titan formated HDDs for up to 16TBs of native storage.
  • Auto optimal UDMA timing. Up to UDMA5 autoconfigured, verifed, and tested on boot.
  • Native ATA TRIM support.
  • True no-DVD drive bypass. No external modifications required.
  • Support for 64MB, 128MB, and 256MB RAM configurations.
  • Automatic system time updating via network on boot.
  • Analog video improvements and fixes with feature parity of the XboxHD+.
  • Native boot animation in 720P.
  • Native force 480P with HD+ fixes.
  • Insignia enhancments.
  • Advance fan control.
  • Kernel debugger over USB.
  • GDB debugger via USB.
  • And so much more...

Kit Contents

  • Project Stellar Board
  • Mounting hardware
  • 2x8 gold-plated pin header
  • Easy d0 Flex for 1.0 - 1.5 installs
  • Easy LPC Rebuild Flex for 1.6 installs


How difficult is it to install?
Stellar should be a drop-in replacement for existing mods in most cases. For unmodified systems, a 2x8 pin header will need to be installed along with the QSB flex for 1.6 systems.

Is this compatible with the XboxHDMI/XboxHD+(v1)?
Yes! A simple adapter kit is required (coming soon).

What can the MicroSD card be used for?
Currently, the MicroSD card is used for additional storage of BIOS images, log files, etc with future plans to allow for mounting virtual HDD images (for non-HDD setups).


This product is not designed, manufactured, sponsored, endorsed, or licensed by Microsoft. All other trademarks or registered trademarks are the property of their respective owners in the United States and other countries. All rights reserved.