changelog.md

XDV-Boot Changelog

2026-02-28

Changed

• Finalized canonical boot sequence in src/boot.ds:
  • splash render,
  • 8-second splash timer window,
  • firmware-origin detection,
  • MBR/UEFI parity verification,
  • /console/kernel.bin load,
  • strict handoff precheck + transfer.
• Added explicit boot failure-path logging (xdv-boot: failure: ...) across:
  • src/boot.ds
  • src/boot_mbr.ds
  • src/boot_uefi.ds
  • src/boot_kernel_load.ds
• Tightened strict handoff semantics:
  • boot.ds now requires valid entry precheck before transfer,
  • xdv-lib boot wrapper now propagates transfer status,
  • xdv_lib_boot_runtime.asm now rejects zero/out-of-window entry offsets.
• Replaced placeholder MBR/UEFI tests with parity/failure-path test cases in:
  • src/boot_mbr_tests.ds
  • src/boot_uefi_tests.ds
• Updated README and docs for XDV-062 flow and strict handoff behavior.

2026-02-20

Added

• Added documentation set under xdv-boot/docs/:
  • docs/README.md
  • docs/boot_sequence.md
  • docs/module_reference.md
• Added this changelog file.

Changed

• Updated README.md to reflect current canonical boot.bin contract:
  • stage0 loads boot.bin only,
  • splash + 8-second hold path,
  • firmware-origin recognition (MBR/UEFI),
  • xdvfs kernel lookup at /console/kernel.bin,
  • boot-side kernel handoff.

2026-02-19

Changed

• Boot flow was formalized in src/boot.ds as:
  • splash -> wait -> firmware-origin detection -> /console/kernel.bin load -> handoff.
• Kernel lookup path was aligned to xdvfs /console/kernel.bin via src/boot_xdvfs_mount.ds.
• Kernel loader messages and semantics were updated in src/boot_kernel_load.ds, src/boot_mbr.ds, and src/boot_uefi.ds to follow the console kernel path.