Bob's Retro mods
OpenXenium  for the original xbox created by Ryzee119.


01 Febuary 2024:

From now all chips sold will be shipped with the PrometheOS operating system.
If you want the XeniumOS please contact me i will change it back for you.


 Features:



  • Software controlled BIOS bank switching (any BIOS combinations that fit into 1mbyte of flash memory (4x256k, 1x512+2x256k, 2x512k, 1x1mbyte).
  • Instant boot to a chosen BIOS using the power button.
  • Boot the XeniumOS with eject button.
  • Ability to boot from the onboard BIOS (colloquially known as TSOP booting). This will completely disable OpenXenium and release D0/LFRAME(1.6) to boot the Xbox as if stock.
  • All the standard features in Cromwell/XeniumOS. (EEPROM tools, Hard drive tools, FTP/SMB Server etc.).
  • Three general purpose outputs. These are normally bitbanged as a SPI master (MOSI,CLK,CS) with the most common use an LCD, however could support any SPI peripheral in theory.
  • Two general purpose inputs. On a Xenium, these are I believe intended to be MISO lines to complement the SPI interface but could be used for any 3.3V digital logic.
  • Three outputs are connected to an RGB led (Or an external user added RGB led).
  • Reserved memory on the flash chip for non-volatile storage of an EEPROM backup and XeniumOS settings.
  • If you bridge the two recovery pins on power up, it will attempt to boot the XeniumOS recovery BIOS if available. This functions the same as a genuine Xenium modchip.
  • I also simulate the LFRAME abort mechanism (Ref Intel LPC Interface Spec Rev 1.1 Section 4.3.1.13) for a v1.6 console to prevent the Xyclops responding to the MCPX LPC Memory Read requests during boot (and conflicting with an external LPC memory peripheral). This is generally accepted to be better than shorting LFRAME the ground constantly which some traditional LPC memory addons do.







Shipping Information

In case you want to buy multiple items please contact me before purchase

Please ask all questions before the auction ends, or before buying the item.

 

 International buyers are welcome !