Booting Windows 11 on hdk8450

[junhaoliao]

Hello there,

I recently came across a spare HDK8450 board and discovered this repository. However, I'm a bit lost on how to get started. I noticed the board is mentioned in the README and saw that it was discussed in #480.

I'm quite familiar with using fastboot, adb, and recovery images, though I don't think any TWRP images exist for this development board. Would you be able to share any pointers or documentation on getting started? If there isn't anything formal yet, even some informal guidance would be great - I'd be happy to help write documentation once I have things working.

Just to get your attention: @sunflower2333 @gus33000

Thanks in advance for your help!

[sunflower2333]

Hi junhao,
It can boot windows yes but it lack drivers like gpu/pil loader etc.

In short the installation has 4 steps:

1. Repartition the device in recovery.

Try execute "adb root" when device is in recovery mode and you will get a root shell if recovery is eng/userdebug build. Push the parted binary below into /tmp or any other paths you prefer and give it execute permission with chmod +x.

Open /dev/block/sda with parted. Generally we shrink userdata size to keep android boot fine. Notice this action will erase all the data on userdata so you should backup essential data in the device. After shrink the partition you need to create a fat esp partition and a ntfs windows partition. Partition label should not contain spaces otherwise fastboot will die after device reboot. Remember to run set <numder of esp partition> esp on before leaving parted.
Reboot the device and check if it can successfully boot to android. Format userdata in recovery if not.

parted.zip

The two partition we created are not formatted currently because the default system does not provide a mkfs tool. You need to do it in android with termux, or format it later on your computer after hdk entering mass storage mode.
dosfstools in termux provides mkfs.fat, run sudo mkfs.fat /dev/block/by-name/<esp partlabel> to format esp partition.
ntfs-3g in termux provides mkfs.ntfs, run sudo mkfs.ntfs -f /dev/block/by-name/<win partlabel> to format windows partition.
if your android is not root you can also get a root shell with termux env after running this script in root adb shell:
termux.sh

adb push termux.sh /sdcard
adb shell
su
sh /sdcard/termux.sh
#: mkfs.xxxx ...

2. Apply windows image to the device in mass storage mode.
   You need to get a WindowsOnArm iso image from UUPDump first. During the waiting time you can try set the usb mass storage mode in reocvery with this script: msc.sh. The disk will appear in disk manager in the pc like this if succeed.

Then you need to choose a tool like wimlib in linux or dism/dism++ in windows. In this case, `F:` is the ntfs partition on hdk. This progress will take a long time. Repair bootmgr in esp partition after applying iso.

3. Boot the uefi we provieded with fastboot boot command.

4. Debug & check if it's booting correctly.