How can undefined opcodes ud0 and ud1 have parameters?

4 How can undefined opcodes ud0 and ud1 have parameters? assembly hardware devblogs.microsoft.com via abareplace 2026-10-08 02:59:21 | caches Archive.org Ghostarchive | no comments

Source: https://devblogs.microsoft.com/oldnewthing/20261007-00/?p=112759/