Presentation on Microprocessor 8086

1. PRESENTED BY
UMANG DHURI
MICROPROCESSOR
8086
DEPARTMENT OF INFORMATION TECHNOLOGY
SHAH AND ANCHOR KUTCHHI ENGINEERING COLLEGE

2. TABLE OF CONTENTS
1. FEATURES
2. PIN DIAGRAM
3. ARCHITECTURE
4. ADDRESSING MODES
5. COMPARISON WITH 8085

3. FEATURES
 16-Bit Data Transfer
 Reverse Compatibility
 Processor Speed and Memory
 Co-processor Support
The introduction of the 8086 microprocessor in 1978 set the
stage for an industry and worldwide standard that would
become the basis for the architecture of every computer made
today, regardless of the operating system. This chip had a
certain set of features that led to it becoming the chip that
almost all modern processors are based on.

4. PIN DIAGRAM

5. ARCHITECTURE

6. ADDRESSING MODES
1. Register Addressing Modes
2. Immediate Addressing Modes
3. Memory Addressing Modes
4. Direct Addressing Modes
5. Relative addressing modes
6. Implied or Implicit addressing mode

7. COMPARISION OF 8086 WITH 8085
MICROPROCESSOR 8086 MICROPROCESSOR 8085
It is a 16-bit Microprocessor It is a 8-bit Microprocessor
Address bus is 20-bit hence can
access 1 MB memory
Address bus is 16-bit hence can
access 64 kb memory
It provides 16-bit registers Ax, Bx,. It provides 8-bit registers A, B, …..
16-bits of Address bus AD0-AD15
are multiplexed
8-bits of Address bus AD0-AD7 are
multiplexed
Flag register is 16-bit and contains
9 flags
Flag register is 8-bit and contains 5
flags
There are two operating modes Operated only in one mode