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Intel's processor history: the path from the Intel 4004 to the Pentium 4

Intel's processor history: the path from the Intel 4004 to the Pentium 4

1978: The Intel 8086: The success story begins

After there were delays at Intel in the development of the I432, the first 32-bit processor from Intel, because the developers did not yet trust a 32-bit processor because it seemed more complicated than they initially did thought, the engineers developed the 8086 within a very short time. With the 8086, Intel's first 16-bit processor, the success story of the 80x86 family begins, which should probably still be a household name today. Probably the greatest advantage of this processor family was the first introduced downward compatibility of the next processors. I.e. for theUsers that their software can also be run on a more powerful processor without any problems. From an initial 4.77 MHz, Intel gradually increased the clock frequency to 10 MHz. Even the slowest version could process 330,000 commands per second and the 10 MHz version was even 750,000 commands per second. The processor had 29,000 transistors and was manufactured using 3 micron technology. It exceeded the performance of the 8080 by ten times and only ten years after the company was founded, Intel had annual sales of $ 283 million.

Intel 8086>
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1979: The Intel 8088: Step backwards for progress

The 8086 was still not very successful because the 16 bit data bus was only accepted very hesitantly so Intel was forced to take a step backwards with the 8088. The 8088 was actually a slimmed-down version of the 8086. The Intel 8088 retained a 16-bit data bus internally, but only worked with 8-bit externally. The 8088 was clocked with both 5 and 8 MHz and, like its 16-bit predecessor, had 29,000 transistors with a production technique in 3 micron technology. For the first time, Intel grants so-called second source licenses for the 8088 and 8086, which allow companies such as AMD, IBM, SGS Thomson and Siemens to replicate the processors. As a result, AMD in particular relied entirely on replicas from Intel in the early years. NEC also built the 8086 from in the 80sIntel after. The resulting NEC V20 showed slight improvements in architecture compared to the original and was therefore slightly faster than Intel's model.

Intel 805>

On the next page: 1981: Intel cooperates with IBM