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OXOS v0.1.2

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@kooscode kooscode released this 17 Oct 03:09
· 79 commits to main since this release
v0.1.2
aa52e13

Compatibility release: Brute Force now starts in xemu and reaches its main menu.

Download: bios_v0.1.2.bin (1 MB, SHA-256 761e37ed9b1cbae51b6e6133a4c4e7006b7ccb1877c8da81d020c5fd672c11c5)

Fixes

  • Brute Force quit straight back to the dashboard.
    • Games built with later XDKs check the disc themselves: the drive must report an authenticated Xbox disc, and the disc's security sector must carry a matching timestamp, hash and RSA signature.
    • xemu doesn't emulate these drive commands, and OXOS carries no Microsoft key. On a drive without them (such as xemu's), the CD-ROM driver now answers them itself. Every security sector handed to a game is signed with OXOS's own open key, which now fills XePublicKeyData.
  • Stuck on "Loading" (Brute Force). The game copies files from the disc to the hard-disk cache until it gets "end of file". Disc (XDVDFS) reads rejected that last read as an invalid parameter. They now check end of file first, as the original kernel does (the same rule v0.1.1 fixed for FATX).
  • Garbage menu textures (Brute Force). The game opens files as z:\dir\\name, with a doubled backslash. The original kernel's FATX driver accepts one doubled separator; ours now does too.
  • CD-ROM pass-through always sends the 12-byte command block, as the original kernel does.
  • KeStallExecutionProcessor uses the original kernel's fixed loop count.
  • Boot splash stays up until the game draws its first frame.
  • Trace builds (make run-trace) show the last CD-ROM drive requests on screen, for diagnosing disc boots.

Checked in xemu

  • Brute Force: intro movie and main menu with correct textures.
  • The dashboard, Halo and Halo 2 work as in v0.1.1.

Using it in xemu

  1. Open Machine → Settings → System.
  2. Set Flash (BIOS) File to bios_v0.1.2.bin and leave MCPX Boot ROM File empty.

Known limitations

  • Not tested on a real console yet.
  • No TV-encoder tables.
  • No certificate key: stock saves and System Link with stock consoles won't work.
  • Brute Force has only been checked as far as its main menu.

Sources (GPL-2.0)

  • This repository at tag v0.1.2.
  • XboxDev/cromwell at 86f547387184d1001d377cce97d3756c8acf91cc for the X-codes and EEPROM key states.
  • Contains no Microsoft code. Not affiliated with or endorsed by Microsoft.
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