and it was used in HP 9800 series computers. By 1972, it became world bestselling memory
chip,
defeating Magnetic memory
Intel MCS Family
MCS Family
Intel CPU
MCS-4 4004
MCS-40 4040
MCS-8 8008
MCS-80 8080
MCS-85 8085
MCS-86
8086, 8088, 80186, 80188,
80286, 80386, 80486,
Pentiums
Intel 4004 produced in 1971 was world first “general purpose” micro-processor and its Lead
Ii designers were– Ted Hoff, Federico Faggin, Stan Mazor, and Masatoshi Shim. Intel 4004 have
Word width: 4-bit, 2300 transistors, Clock frequency: 108KHz/500/740.It have 46 instructions,
Registers: 16 x 4-bit, Stack: 12 x 4- bit with Address space of 1Kb for program and 4Kb for data.
In1972 came the Intel 8008 - worldfirst 8-bit microprocessor whose designers were– Ted Hoff,
Stan Mazor, Hal Feeney, and FedericoFaggin. Intel 8008 have word width: 8-bit, Clock
frequency: 800 KHz with 3500 transistors, 48instructions, Registers: 6 x 8-bit, Stack: 17 x 7-
bitand Address space: 16KB. In 1974 came the Intel 8080 whose Lead designers were –
Feder1icoFaggin, Masatoshi Shima and Stan Mazor.
"The 8080 really created the microprocessor market”. Itwas used in MITS Altair 8800 in 1975
and termed as “Microcomputer”. It have Word width: 8-bit with 4500 transistors, Clock
frequency: 2M-3MHz and Address space: 64KB, Registers: 6 x 8- bit, IO ports and Stack
pointer.
Intel 16-bit Microprocessors came in 1978 when Intel launched Intel 8086, first x86 family
microprocessor with Source compatibility with 80xx lines and its Followers were: 8088 (1979),
80186 (1982). It have 16-bit: all registers, internal and external buses with 29,000 transistors,
5MHz of clock frequency, 20-bit address bus, 4MB address space and 16-bit register –
segmentation programming. IBM PC in 1981 used 8088 processor. Then came the Intel 80286 in
1982 with 134,000 transistors with clock frequency of 6M-8MHz and 1.5 MIPS it was used by
IBM PC/AT in 1984 it was Designed for multi-tasking with MMU “protection mode”. Intel i432,
Intel first 32-bit microprocessor design it was “intel Advanced Processor architecture”. Started in
1975 as the 8800, follow-on to the existing 8008 and 8080 CPUs, intended purely 32-bit, to be
Intel backbone in the 1980s, to support Ada, LISP, advanced computations, the HW supports to
all the good terms with Object Oriented programming and capability-based addressing,
multi-tasking and IPC, Multiprocessing, Fault tolerance. But the Problems with it was two-chip
implementation, lack of cache, bit-aligned variable length instructions. It Failed: ¼
performance of 286 as of 1982. Then in 1980 Intel 8087 came into picture with First floating-
point coprocessor for 8086 lines, its Performance was: +20% ~ 5x; it have Floating registers
form 8 level stack: st0~st7 work in two mode: 8-bit/16-bit follow IEEE 754 standard. Then
follows: Intel 80287 – 16-bit and Intel 80387, 80487 – 32-bit. Starting from Intel 80486DX,
Pentium and later model has on chip floating point unit and “DX” was used for on-chip FP
capability. Intel introduced 80386 processor in 1985 it was Intel first X86 32-bit flat memory
model with 4GB space. 80386 instruction set, programming model, and binary encodings were
the common denominator for all IA-32, i386, x86 series. It has Paging to support VM, hardware
debugging, first use of pipeline it wasn’t necessarily a big performance improvement over
80286,it contain 275,000 transistors with clock frequency of 12MHz initially, later 33MHz and
11.4MIPS. Compaq: first PC using 80386, legitimize PC “clone” industry.
In 1985 Intel produced i960. Intel 80960, Intel was first RISC (Reduced instruction set
computing) microprocessor it was the Best-selling embedded microcontroller at the time. It was