Unverified50% confidenceFactExact time
The ud2 instruction in the x86 architecture is used to trigger an Invalid Opcode (#UD) exception.
1
Sources
50%
Confidence
Long-term
Relevance
9/13/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedAlthough ud1 has long existed in processors and similarly triggers #UD, it was once in an ambiguous state of being reserved but not formally committed to, before Intel later incorporated ud1 and ud0 into its official mnemonic system in documentation.67% similarUnverifiedThe opcode corresponding to ud2 is 0F 0B.65% similarUnverifiedTo build a Universal Binary, Xcode developers typically only need to change the architecture setting to Standard Architectures (arm64, x86_64) and recompile.62% similarUnverifiedThe macOS 12 launch failure was a regression defect introduced in Claude Code version 2.1.255.55% similarUnverifiedZimaBoard 2 is an x86-architecture single-board server that, unlike the ARM-architecture Raspberry Pi, can directly run standard Linux distributions and x86 applications without cross-compilation.53% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/919432API
curl https://kongchang.com/api/v1/knowledge/claims/919432MCP
get_claim(id=919432)