CMP - Compare Instruction

The CMP instruction compares the second operand to the first operand. When called this instruction sets the flags to indicate the result of the comparison.
This command has 3 parts, Instruction, Register, then either a Register, Immediate value, or a memory address.

Assembly
Sample Description 16 bit Machine
Code

CMP AX, 0x00F2 ; Compare an immediate number to a Register 3D F2 00

CMP AH, AL ; Compare two 8 bit Registers 3A C4

CMP BX, AX ; Compare two 16 bit Registers 3B C3

CMP [BX], AX ; Compare a Register with a memory address 39 07

CMP AX, [BX] ; Compare a memory address with a Register 3B 07

Assembly Sample	Description	16 bit Machine Code
CMP AX, 0x00F2	; Compare an immediate number to a Register	3D F2 00
CMP AH, AL	; Compare two 8 bit Registers	3A C4
CMP BX, AX	; Compare two 16 bit Registers	3B C3
CMP [BX], AX	; Compare a Register with a memory address	39 07
CMP AX, [BX]	; Compare a memory address with a Register	3B 07