Computer Architecture, Instruction Set, Intel, X86, Computer Science.
ModR/M) specify the second operand. On to the ModR/M byte Our ModR/M byte is 18. That is 1101 1000 in binary. If we break this into its components, Mod --> 11 --> 3 Reg --> 011 --> 3 R/M --> 000 --> 0 Okay…. Now what? Once again the developer manual saves the day. In Volume 2 Chapter 2, there is