AAA addition ASCII code or non-compressed BCD code Adjustment Command
AAD division ASCII code or non-compressed BCD code Adjustment Command
AAM multiplication ASCII code or non-compressed BCD code Adjustment Command
ASCII code or non-compressed BCD code Adjustment Command for AAS Subtraction
Add addition command
ADC incoming bit addition command
And logic and Operation
BSF forward scanning command (scan the first bit containing 1 from right to left and send the bit number to the specified operand)
BSR reverse scanning command (from left to right, scan the first bit containing 1 and send the bit number to the specified operand)
BT-bit test Command Format: Bt DST. SRC tests the bits in DST specified by Src. The bits are sent to CF
BTC bit test and get the reverse Command Format: btc dst, Src test and retrieve the bits in the DST specified by Src. The original value is sent to CF
Btr bit Test and reset command format: btr dst, Src test and clear the bits in the DST specified by Src, the in-situ value is sent to CF
Bts bit Test reset command format: bts dst, Src test reset 1 specified by the src dst bit, in-situ value sent to CF
Call subroutine call command
CBW byte conversion to word (extend the byte symbol in Al to Ah)
CDQ dual-word extension to four characters (extend the characters in eax to EDX)
CLC carry mark CF clear 0
CLD direction mark DF clear 0
CLI interruption allows flag if clear 0
CMC carry mark CF reverse
CMP comparison (two operands are used as subtraction, only the flag bit is modified, and the result is not returned)
CMPS string comparison command
Cmpsb string comparison command _ character
Cmpsd string comparison command _ dual-Character
Cmpsw string comparison command _ word
CWD words are extended into dual characters (extending the characters in ax to dx)
Conversion from cwde to dual (extending the word symbols in ax to eax)
DAA addition decimal (compressed BCD code) Adjustment Command
Decimal (compressed BCD code) Adjustment Command for DAS Subtraction
Dec minus 1 command
Div unsigned number division command and the above two, result delivery: Commercial Al, remainder AH (byte operation), or commercial ax, remainder dx (word Operation)
Hlt command to stop the CPU)
Idiv with the symbol number division command and the above two, the result is sent back: the provider returns Al, the remainder returns AH (byte operation), or the provider returns ax, the remainder returns dx (word Operation)
Imul returns the results of the symbol number multiplication command AH and Al (byte operation), or Dx and ax (word operation)
In I/O port input (for example, in Al, 61 h) the input port refers to the timing in the immediate mode, and the range is 0-255; the input port refers to the timing in the DX register, the value range is 0-65535.
INC plus 1 command
INS string input command
InSb string input directive _ character
INSD string input command _ dual-Character
Insw string input directive _ words
Int interrupt call command
Iret interrupt return command
Ja unsigned integer is higher than the Transfer Instruction (A: above)
Jae unsigned integer greater than or equal to the Transfer Instruction (A: abve E: equel)
JB unsigned integer lower than the Transfer Instruction (B: below)
The value of the jbe unsigned integer is less than or equal to the Transfer Instruction (B: Below E: equel)
JC transfer command when there is a bid
Jcxz test CX value is 0 transfer command
Je equal Transfer Instruction
Jecx test ECx value is 0 Transfer Instruction
The signed integer of JG is greater than the Transfer Instruction (G: greater)
The signed integer of jge is greater than or equal to the Transfer Instruction (G: greater E: equel)
Jl signed integer less than Transfer Instruction (L: less)
The signed integer of jle is less than or equal to the Transfer Instruction (L: less E: equel)
JMP unconditional transfer instruction
The unsigned integer of JNA is no higher than the Transfer Instruction (A: abve)
The jnae unsigned integer is not higher than or equal to the Transfer Instruction (A: abve E: equel)
Jnbe unsigned integer not less than or equal to the Transfer Instruction (B: Below E: equel)
The unsigned integer of JNB is not lower than the Transfer Instruction (B: below)
Transfer command when JNC has no carry
JNE unequal Transfer Instruction
The signed integer of jng is not greater than the Transfer Instruction (G: greater)
Jnge signed integer not greater than or equal to the Transfer Instruction (G: greater E: equel)
JNL signed integer not less than Transfer Instruction (L: less)
Jnle signed integer not less than or equal to the Transfer Instruction (L: less E: equel)
Transfer command when jno does not overflow
Jnp odd Transfer Instruction
JNS non-Negative Transfer Instruction
Jnz result is not 0 Transfer Instruction
Jo overflow transfer command
JP even Transfer Instruction
Jpe even Transfer Instruction
JPO odd transfer command
JS Negative Transfer
The result of jz is 0 transfer instruction.
Transmit the lahf flag register and load the flag into ah
LDS transfers the target pointer and loads the pointer content into Ds, for example, LDS Si and string. Saves the segment address: Offset address to DS: Si.
Lea load valid address example: Lea dx, string; Save the offset address to DX
Les transfers the target pointer and loads the pointer content into es, for example, les Di and string. Saves the segment address: Offset address to ES: Di.
LFS transfers the target pointer, and loads the pointer content into FS, for example, LFS Di and string; saves the segment address: Offset address to FS: Di
LGS transfers the target pointer, and loads the pointer content into Gs for example: LGS Di, string; saves the segment address: Offset address to GS: Di
Lock prefix command (to make the bus lock signal valid)
Lods takes string commands (loads the elements (words or bytes) in the source string into Al or ax one by one)
Lodsb string-based instruction _ character-based
Lodsd string-taking command _ double-Character
Lodsw string-taking command _ string-taking
Loop command (CX is not a zero-hour loop)
Loope equal loop command
Loopne unequal cyclic commands
Loopnz unequal cyclic commands
Loopz equal loop command
The LSS transfers the target pointer and loads the pointer content into the SS instance: LSS Di, string; saves the segment address: Offset address to SS: Di
MoV transfer command
SEG mov ax, SEG tab-> send the base address of the tab segment to the ax register
Offset mov Di, offset tab-> send the segment offset of the tab to the di register.
Movs serial transmission commands
Movsb string Transfer Instruction _ Transfer Character
Movsd string Transfer Instruction _ transfer dual-word
Movsw string Transfer Instruction _ transfer word
Mul unsigned number multiplication command results are returned to Ah and Al (byte operation), or Dx and ax (word Operation)
Neg inverse (that is, seeking compensation, minus 0)
NOP null operation
Not logical non-(inverse)
Or logic or operation
Out I/O port output (for example, out 61 H, Al) the output port refers to the timing in the immediate mode. The range is 0-255, and the DX indicates the timing in the register, the value range is 0-65535.
Outs string output command
Outsb string output command _ character
Outsd string output command _ dual-Character
Outsw string output directive _ words
Pop output stack command
Popa pops up the stack of DI, Si, BP, SP, BX, dx, CX, and ax in sequence.
Popad pops up the stacks of EDI, ESI, EBP, ESP, EBX, EDX, ECx, and eax in sequence.
Popf 16-bit mark out stack command
Popfd 32-Bit Flag stack command
Push into Stack command
Pusha pushes ax, CX, dx, BX, SP, BP, Si, di into the stack in sequence.
Pushad pushes eax, ECx, EDX, EBX, ESP, EBP, ESI, and EDI to the stack in sequence.
Pushf 16-bit mark into the stack command
Pushfd 32-bit mark into the stack command
RCL shifts the left of the bitwise loop.
Right Shift of RCR bit-in cycle
RET subroutine return instruction
Rol loop shifts left
Ror loop shifts right
Send the sahf mark register and load the ah content into the mark register.
Sal arithmetic left shift (= SHL)
SAR arithmetic shift right
SBB with borrow subtraction command
SCAs string scan command (compare the content of Al or ax with the target string, and the comparison result is reflected in the flag bit)
Scasb string scan instruction _ character
Scasd string scan command _ dual-Character
Scasw string scan instruction _ word
Set Seta to 1 when it is higher
Set setae to 1 if it is greater than or equal
Set SETB to 1 when it is lower
Set setbe to 1 if it is less than or equal
Set SETC to 1 when it has a bid.
Set sete to 1 when it is equal.
Set setg to 1 when it is greater
Set setge to 1 if it is greater than or equal
Set SETl to 1 when it is smaller
Set setle to 1 if it is less than or equal
Set setna to 1 when it is not higher
Set setnae to 1 if it is not greater than or equal
Set setnb to 1 if it is not lower
Set setnbe to 1 if it is not less than or equal
Set setnc to 1 when there is no carry
If setne is not equal, set it to 1.
Set setng to 1 if it is not greater
Set setnge to 1 if it is not greater than or equal
Set setnl to 1 if it is not smaller
Set setnle to 1 if it is not less than or equal
Set setno to 1 if no overflow exists
When the setnp result is 8 bits with an odd number of 1, it is set to 1.
Set setns to 1 when it is not negative
If setnz is not equal to 0, set it to 1.
Set Seto overflow to 1
When the setp result is 8 bits with an even number of 1, the value is set to 1.
When the setpe result has eight lower bits and an even number of 1 bits, it is set to 1.
When the setpo result is 8 low and there are odd numbers of 1, the value is set to 1.
When sets are negative, set them to 1.
When setz is equal to 0, it is set to 1.
SHL logic left shift
Shld Double Precision left shift command
Right Shift of SHR Logic
Shrd Double Precision right shift command
The STC carry Mark sets CF to 1.
1 For the direction sign of STD DF
STI interruption allowed flag if set 1
STOs memory string command (lods inverse process)
Stosb memory string directive _ memory characters
Stosd storage string directive _ storage dual-word
Stosw storage string directive _ storage words
Sub subtraction command
Test (two operations and operations are performed. Only the flag bit is modified and the result is not returned)
Wait command (leave the CPU in the waiting state)
Xadd swap first and then accumulate (the result is in the first operand)
Xchg exchange word or byte (at least one operand is a register, segment register cannot be used as the operand)
Xlat byte Table query Conversion
XOR logical exclusive or operation