MICROPROCESSOR INTERFACING It is 4 bit microprocessor From

MICROPROCESSOR & INTERFACING

It is 4 –bit microprocessor From intel corporation in 197 s having only 1000 transistir

8008

8080 t is 8 -bit general purpose MP From Intel in 1974 t is not functionally complete

8085 The first 8 -bit functionally complete MP From Intel in 1977

8085 houses a good an optimum Set of registers and Reasonable powerful ALU

Limitations of 8085 mited memory addressing capacity Slow speed of execution imited scratchpad registers on availability of complex instructio Set and addressing modes does not support adequate pipelini And parallalsim

First 16 -bit CPU from Intel consists a set of 16 bit general Purpose registers t supports 16 bit ALU s having rich instruction set s having segmented memory schem supports pipelining and parallelism

THE development of IBM-PC started in July 1980

8088 BUTTTT

supports only 8 -bit data bus 1 or 2 floppy disk drives keyboard Monochrome monitor Os is early MS-DOS

n March 1983 new version of IBM-PC called PC-XT WITH 1 Mb hard disk double side density floppy disk driv Keyboard Monitor ynchronous communication adapte

80186/80188 These are improved version of 8086/8088 These are having programmable eripheral devises integrated in sam package Instruction set of 8086/8088 is Upward compatible to 80186/80188

80286 It is 16 -bit processor used as a he CPU in a multiuser or multitaskin Microprocessor This CPU used in IBM PC /AT personal computer

80386

80486