Evolution of Microprocessor
Intel 4004 was first microprocessor boar upon PMOS technology. It was of 4 bit processing speed was very slow then 8 bit microprocessor was again developed by Intel 8080 & 8088 ,8080 was PMOS and 8085 based on N-MOS
Intel then introduce 16 bit microprocessor 8086 , 8088 and B0186 there 16bit microprocessor were very fast because of VLSI technology.
VLSI uses C-MOS logic family (complementary metal oxide semiconductor)
in this technology for designing any logic circuit there is need of resister
Registers are passive elements and register design by active elements. If resister will not be used in the circuit having affect will be zero.
Then Intel introduces 32 bit microprocessor Intel 80386, 80486, Pentium 1,2,3,4 after that 64 bit system was developed.
8 bit, 16 bit, 24 bit, 32 bit, 64 bit defines word length of microprocessor.
8 bit= 1 byte
32 bit mean microprocessor will perform 32 bit data at a time ,speed will increase by increasing word length because of this reason clock frequency or speed operation of microprocessor for different bit .
2) Intel 8085
It is also developed by Intel and was discovered in 1976. The speed of operation is 3.07Mhz.It is 8 Bit microprocessor. It has memory of 64Kb.
It is manufactured by Intel in 1982.The speed of operation is 5 to 10Mhz. It has 16 bit processor and memory is 1MB.
4) Intel 80286,80386
These microprocessors are manufactured by Intel in 1985 and 80286 has speed operation of 6 to 12Mhz and 80386 has speed operation of 20 to 33Mhz.It also has 16 bit processor and memory is 16MB.
5) Intel 80486
Intel 80486 microprocessor are manufacture in 1989. The speed of operation is 25 to 100 MHz It has 32 bit processor. Memory of Intel 80486 microprocessor is 4GB.
6) Pentium 1
Pentium 1 is also manufacture by Intel in 1993.The speed of operation of Pentium is 60 to 200Mhz.It has processor of 32 Bit and have memory of 4GB.
7) Pentium 2
Pentium 2 was manufacture in 1997 and Intel Pentium 2 microprocessor have speed operation of 230 to 400Mhz.It has 32 Bit processor and memory is 4GB to 6GB.
8) Pentium 3 and Pentium 4.
Pentium 3 and Pentium 4 microprocessor was manufactured in year of 2000. The speed of operation of Pentium 3 is up to 1.3GHz and Pentium 4 have speed up to 1.3 to 1.5GHz. Both have processor of 32 Bits and memory 4 to 6GB.
Itanium processor are manufactured in 2001 and speed operation is up to 3Ghz and uses the 64 bit processor and memory is up to 12Gb.
10)3rd and 4th Generation Microprocessor.
i3,i5 and i7 are the 3rd & 4th generation microprocessors and they have high processing speed and supports larger memory. They are multithreading microprocessors.