R20 MPMC UNIT-1:: Instruction set of 8086 microprocessor -PDF
AY:2022-23, SEM-II
UNIT-2: INSTRUCTION SET OF 8086 MICROPROCESSOR- PDF
Instuctionset of 8086 & Instuction format -PDF
The instruction set of 8086 can be classified into
1. Data Transfer Instructions
2. Arithmetic Instructions
3. Logical Instructions
4. String Manipulating Instructions
5. Control transfer Instructions
6. Processor control instructions
The size of 8086 instruction is one to six bytes.
In general the first byte of instruction will have a 6-bit opcode
and two special bit indicators d-bit and w-bit (or s-bit and w-bit )
(or v-bit and w-bit)
Some instructions will have 7-bit opcode and one special bit
indicator w-bit or z-bit
Some instructions will have 8-bit opcode
Some of the instructions will have 3-bit register field in the first
byte of the instruction
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