Data Transfer Instructions

MOV  dest,src      transfer (copy) data to/from register, to/from memory
                    dest←src

XCHG dest,src      exchange values of two registers or register and r/m
                    dest  src

IN port8 (or DX)   input to AL(or AX) from I/O port
                    byte: AL←port
                    word: AL←[port]; AH←[port+1]

OUT port8 (or DX)  output from AL(or AX) to I/O port
                    byte: [port]←AL
                    word: [port]←AL [port+1]←AH

XLAT               translate AL into a value in a translation table at BX
                    AL←ES:[BX+(AL)]

LEA  reg16,addr    load address into a register
                     reg16←(result of EA calculation of addr offset)

LDS  reg16,mem     load DS and reg16 from memory variable
                    reg16←[mem16]; DS←[mem16+2]
LES  reg16,mem     load ES and reg16 from memory variable
                    reg16←[mem16]; ES←[mem16+2]

LAHF               load/convert flags into AH
SAHF               store/convert AH into flags
PUSH src           transfer reg16 or r/m16 to stack
                    SP-=2; SS:[SP]←src
PUSH immed         transfer immed16 (or sign-extended immed8) to stack.
                   SP-=2; SS:[SP]←immed16                              286+

PUSHA              PUSH ALL: copy general registers to stack           286+
                    SP-=10H; AX,BX,CX,DX,SI,DI,BP,SP saved on stack

PUSHF              PUSH Flags: transfer flags register to stack
                    SP-=2; SS:[SP]←flags

POP dest           transfer from stack to dest (reg16, r/m16, or segreg)
                    dest←SS:[SP]; SP+=2

POPA               POP All: copy general registers from stack          286+
                    SP+=10H; AX,BX,CX,DX,SI,DI,BP restored from stack

POPF               POP Flags: transfer from stack to flags register
                    flags←SS:[SP]; SP+=2
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 String Operation Instructions                              Instruction Set