XDV-Boot

Status: Active
Language: Dust Programming Language (DPL)

xdv-boot is the boot.bin runtime for XDV OS.

It owns the boot sequence after stage0 loads boot.bin:

1. render XDV splash,
2. hold splash window for 8 seconds,
3. detect firmware origin (MBR or UEFI),
4. mount xdvfs and resolve /console/kernel.bin,
5. load kernel image and hand off execution.

Boot Contract

• Stage0 (xdv-os/src/boot_sector.asm) loads boot.bin only.
• xdv-boot resolves kernel location from xdvfs (/console/kernel.bin).
• xdv-boot performs final transfer to kernel entry.

Repository Layout

• src/boot.ds: canonical boot flow for boot.bin.
• src/boot_splash_profile.ds: ASCII splash payload.
• src/boot_loader_profile.ds: MBR/UEFI origin recognition.
• src/boot_mbr.ds: MBR partition profile and load helpers.
• src/boot_uefi.ds: UEFI/GPT profile and kernel handoff helpers.
• src/boot_xdvfs_mount.ds: xdvfs mount and /console/kernel.bin lookup.
• src/boot_kernel_load.ds: kernel header read, validation, segment load, entry jump.
• src/boot_stage1.ds: stage init orchestration model.
• src/boot_disk.ds: disk access and read/write checks.
• src/boot_gdt.ds, src/boot_idt.ds, src/boot_paging.ds: boot CPU/runtime setup models.
• src/*_tests.ds: module-level behavior tests.

Documentation

• docs/README.md
• docs/boot_sequence.md
• docs/module_reference.md
• changelog.md

Validate

dust check xdv-boot/src