The Intel 80486.
The Intel 80486("eighty-four-eighty-six") (Marketed i486, spoken as Intel 486)
depends on the manufacturer and type of 486 for example dx2. between 0.1 - 0.2 grams of gold
Ross P. Nelson has written: 'Microsoft's 80386/80486 programming guide' -- subject(s): Assembler language (Computer program language), Intel 80386 (Microprocessor), Intel 80486 (Microprocessor), Programming
Because a number could not be copyrighted. Thus Intel went to names for their CPUs instead of numbers to prevent clones from carrying the same designation.
The Intel 80486 was a microprocessor family produced by Intel introduced in 1989. It was their first 86 processor with a math coprocessor built into it. It's predecessor family were the 386 family and it's sucessor was the Pentium chip
The Intel 80486
There is no microprocessor with !t of address memory, only virtual memory. the firt one was the 80486.
The 4004 was Intel's first microprocessor and the world's first single chip microprocessor. For the first PC as we know it (the 1981 IBM PC), it was the 8088, following with 80286, 80386, 80486 and then the Pentium line.
AMD was a major supplier of various integrated circuits: logic, DRAM, the 2900 family bitslice bipolar microprocessor chipset, etc. However they lacked a single chip MOS microprocessor like those made by Intel, Motorola, Zilog, Texas Instruments, National Semiconductor, etc. When Intel encountered a problem meeting demand for their 80386 single chip MOS microprocessor they sought out another chip manufacturer with available fabrication facilities. At the time AMD had surplus fabrication facilities and Intel and AMD quickly reach an agreement where Intel would provide AMD with the masks and other manufacturing details for the 80386 and AMD would licence some of their patents to Intel. The two companies would then share the market and sales of the 80386. When Intel designed their 80486 single chip MOS microprocessor, they had already expanded their fabrication facilities enough that they would not need help from AMD to make enough 80486 microprocessors to meet demand. However AMD expected that the original 80386 agreement demanded Intel provide masks and other manufacturing details for successive Intel designed microprocessors (beginning with the 80486). Intel refused and the case went to court. Meanwhile AMD began designing an 80486 microprocessor clone on their own. Intel claimed in the court case that AMD could not do that as 80486 was a trademark, but the court pointed out that trademark law does not permit trademarking of numbers. This allowed both Intel and AMD to manufacture, market, and sell their own independently designed versions of the 80486 microprocessor. When Intel designed their 80586 single chip MOS microprocessor, because of the court decision that numbers could not be trademarked Intel chose to use a word which could be trademarked instead of 80586 and (somewhat unimaginatively) made up the word Pentium for the 80586. Of course AMD designed their own 80586 clone independently (as they had done with the 80486) and made up their own word as a trademark for it. Ever since then when Intel has enhanced the x86/Pentium architecture, AMD has independently designed a clone supporting the new architectural features. However AMD has their own implementation ideas to improve and optimize performance, so sometimes the Intel microprocessors have had better performance and other times the AMD microprocessors have had the better performance.
They are two different companies. Cyrix is a smaller company, their processors are not as performant as Intel ones, however they would exponse exactly the same set of instructions. Regardless the lack of performance compared with Intel, Cyrix had a very good market in the mid 90s, for people that did not have the money to purchase Intel. Instead of purchasing an Intel at 166 Mhz with 400 dollars, one could purchase a Cyrix at 150 Mhz for only 99 dollars. Of course, the performance of the cyrix would be far smaller, but the price difference would make it worthwile. Had a Cyrix between 97 and 2000. Was very happy with it.
it should. they are the same from 88-92