Please don't use this unless you are actually writing code for the 8086. For example: the NOP instruction in your assembler will result in the same opcode with

Please don't use this unless you are actually writing code for the 8086. For example: the NOP instruction in your assembler will result in the same opcode with less work. Why write the XCHG if you don't have to? Hell, at that point it's probably faster to write the 0x90 straight into the obj code.