8086 MOV Instruction 
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13 February 2021 | 
6040
8086 assembly language MOV instruction is a data transfer instruction that copies a byte or word data from a specified source (second operand) to a specified destination (first operand).
The source can be value, general-purpose register or a memory location. Destination can be a general purpose register or a memory location. both operand can be byte or a word and should be of the same size.
MOV instruction does not affect any flag.
Types of operands supported
Instruction Operands ---------------------------- MOV reg, Memory memory, reg reg, reg memory, immediate reg, immediate sreg, memory memory, sreg reg, sreg sreg, reg
reg: AX, BX, CX, DX, AH, AL, BL, BH, CH, CL, DH, DL, DI, SI, BP, SP. memory: [BX], [BX SI 7], variable, etc immediate: 5, -24, 3Fh, 10001101b, etc
For Segment registers only the below type of mov are supported
MOV SREG, memory MOV memory, SREG MOV REG, SREG MOV SREG, REG
For Segment registers only the below type of mov are supported
SREG: DS, ES, SS, and only as second operand: CS.
mov instruction cannot be used to set the value of CS & IP registers