Thank you for double checking, the confusing part for me was that during the boot process it would stop at AE and blackscreen for a long time, not used to not seeing the splash screen for XP. On X4C the same thing happens but at least it doesn't blackscreen for quite as long.
FYI X6 BIOS broke XP support, hang on AE no matter what image I tried, either on 12th or 13th gen. When I flipped to backup BIOS chip on X3K everything worked again. Not sure where support was broken, maybe after X4?