1. Computer Organization & Assembly Language
Lecture # 3
By Muhammad Jafer

2. History of Intel Evolution
Evolution from 8080/8085 to 8086
Evolution from 8086 to 8088
Pentium & Pentium Pro
Pentium II
Pentium III
Pentium 4
Itanium

3. Evolution 8080/8085 8 bit 64 K 8086 1978 16bit 1 megabyte Piplelining
16 bit Internal & External Address Bus
Peripheral Problem
Expensive

4. Evolution 8088 Similar like 8088 8bit external data bus IBM PC MS-DOS
80286
1982
16bit (Internal & External Busses)
24 Address Lines
16 MB
Virtual Memory
Real & Protected Modes

5. Evolution 80386 1985 32bit (Internal & External Busses) 4GB
Virtual Memory to 16TB
Math CoProcessors
386SX
16 bit External Data Bus
24 bit Address Bus
16 MB
Cheaper
Cache Memory

6. Evolution Intel Pentium 1992 x86 Microprocessor 80586
3 million transistors
60 & 66 MHz
Later became 3 time faster due to new design
Compatible with old x86
8k Cache Memory for Separate Data & code
64 bit Address Bus
32 bit Registers & Data Bus
4 GB
Improved Floating Point
Pentium Pro for Servers & Work Stations

7. Evolution Pentium || 1997 MMX (Multi Media Extention)
Fast graphics & Audio
Pentium || Xeon
Servers
Work Station
Celeron
1999
Great Performance
For Education, Home & Small Business
Cheaper

8. Evolution Pentium III 1999 New Instruction for
SIMD (Enhance Video & Audio)
Pentium ||| Xeon
Servers
Work Station
Pentium 4
New Design Called Net Brust
New Instruction for Video & Audio.
Increase Speed of Buses & Processors

9. Chapter Review The x86 PC Assembly Language, Design & Interfacing
The x86 Processor
Brief History of the x86 family