拡張 かくちょう命令 めいれいコードじゃないです
kakuchōmeireikōdojanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 拡張命令コード

1. It's not an extended instruction code.; It isn't an extended instruction code.

Negative
Polite
Casual Register
Computing