I 8086 instruction set list

Intel 8086 instruction set includes a few very powerful string instructions. When these instructions are prefixed by REP (repeat) instruction, the CPU will perform block operations - move block of data, compare data blocks, set data block to certain value, etc, that is one 8086 string 8086 ADD Instruction. This instruction adds the data of destination and source operand and stores the result in destination. If the sum of two operands exceeds the size of destination operand, then it would set the carry flag to 1. The ADD instruction can affect AF, CF, OF, PF, SF, ZF flags depending Internal Architecture of 8086. • 8086 has two blocks BIU and EU. • The BIU performs all bus operations such as instruction. fetching, reading and writing operands for memory and calculating the addresses of the memory operands. • The instruction bytes are transferred to the instruction queue. • Complete 8086 instruction set. Quick reference A list of all 8086 CPU compatible instructions is published here (without numeric opcodes). Only those instructions that appear both in Pentium ® manuals and in this reference may be used for 8086 microprocessor. 8086 Table 2 Instruction Set Summary (Continued) Mnemonic and Description LOGIC Invert SHL SAL Shift Logical Arithmetic Left Shift Logical Right Shift Arithmetic Right The following list represents key differences between this and the -004 data sheet Please review this summa- ry carefully 1 The Intel 8086-Instruction set of 8086- String and Program Execution Transfer instructions The following section explains the Bit Manipulation instructions of 8086 in details.These instructions include logical , shift and rotate instructions in which a bit of the data is involved. 8086 Instruction Encoding-1. Instruction Format (Cont'd) ! Instruction may also be optionally preceded by one or more. When the s bit is set it means that the single byte operand should be sign-extended to 16 bits. Complete 8086 instruction setQuick reference This is especially important for Conditional Jump instructions (see "Program Flow Control" in Tutorials for more information).Instructions in alphabetical order:Instruction Operands Description AAA No operands. 1. Instruction Set of 8086 The 8086 instructions are categorized into the following main types. i. Data Copy / Transfer Instructions ii. 2. Machine Control instructions. Flag Manipulation instructions The Flag manipulation instructions directly modify some of the Flags of 8086. i. CLC - Clear Carry * Opcode 0F - "POP CS" on the 8086, and the first byte in multi-byte opcodes on later processors - is also treated as an undefined opcode. I wouldn't expect to see this in 8086 code (as the "POP CS" instruction is particularly useless) and wanted to treat its appearance as an error condition. instruction set of 8086Full description 8086 instruction set opcode aaa aad aam aas ADC ADD and CA"" C%& C"C CD" C"I CMC Cmp cmps cmps cmps% cmps& C&D daa das dec DI+ esc -"t IDI+ IM</b>" in inc int into iret .a .ae .% .% For every instruction that is executed in the 8086 microprocessor, an instruction format is available that is the binary representation of that instruction. This instruction format can be coded from 1 to 6 bytes depending upon the addressing modes used for instructions. For every instruction that is executed in the 8086 microprocessor, an instruction format is available that is the binary representation of that instruction. This instruction format can be coded from 1 to 6 bytes depending upon the addressing modes used for instructions.