Page "INT (x86 instruction)" Paragraph 9

The opcode for INT 3 is < tt > 0xCC </ tt >, as opposed to the opcode for INT immediate, which is < tt > 0xCD imm8 </ tt >.

According to Intel documentation: " Intel and Microsoft assemblers will not generate the CD03 opcode from any mnemonic " and < tt > 0xCC </ tt > has some special features, which are not shared by " the normal 2-byte opcode for INT 3 ( CD03 )" Arch.

Software Developer ’ s Manual.

Vol.

2A