Documentation is now handled by the same processes we use for code: Add something to the Documentation/ directory in the coreboot repo, and it will be rendered to https://doc.coreboot.org/. Contributions welcome!
In order to be able to boot Windows using a coreboot system we recommend to use SeaBIOS as the payload.
All Windows versions since Windows XP require a quite complete ACPI implementation. If you have trouble booting Windows, have a look at our ACPI page.