|
We have put this page here to show
The first CPU from Intel
Worlds first Microprocessor November 15, 1971)
The 4004 is the world's first microprocessor. The 4004
was created at Intel with Ted Hoff and Federico Faggin as the lead
designers. The 4004 provided a new tool to the world. Up to that time
and semiconductors and IC's were built for a specific purpose. The 4004
was the first semiconductor device that provided, at the chip level, the
functions of a computer.
The 4004 contains the two basic architectural building
blocks that are still found in today's microcomputers: the arithmetic
and logic unit and the control unit. The Intel 4004 ran at a clock speed
of 108 kHz and contained 2300 transistors. By the time it was in
production the clock speed was increased to 500kHz and later to 740kHz.
It processed data in 4 bits, but its instructions were 8 bits long. The
4004 addressed up to 1 Kb of program memory and up to 4 Kb of data
memory (as separate entities). It had sixteen 4-bit (or eight 8-bit)
general purpose registers, and an instruction set containing 45
instructions
| Year: |
1978 |
Intel 8086 microprocessor is a first member of x86 family of
processors. Advertised as a "source-code compatible" with Intel
8080 and Intel 8085 processors, the 8086 was not object code
compatible with them. The 8086 had complete 16-bit architecture
- 16-bit internal registers, 16-bit data bus, and 20-bit address
bus (1 MB of physical memory). Because the processor had 16-bit
index registers and memory pointers, it could effectively
address only 64 KB of memory. To address memory beyond 64 KB the
Intel 8086 used segment registers - these registers specified
where code, stack data and extra data 64 KB segments are located
within 1 MB of total processor memory. To accommodate this
awkward memory addressing many 8086 compilers included 6
different memory models: tiny, small, compact, medium, large and
huge. 64 KB direct addressing limitation went away with the
introduction of the 32-bit protected mode in Intel 80386
processor. |
We will update this page with more interesting data and articles all
about the history of the computer from early days right up to modem
times.
Here is link to go to the Top 500
List on super computers in the world http://www.top500.org/ |
