486 - meaning and definition. What is 486
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What (who) is 486 - definition

YEAR
486 AD; 486 (year); Year 486; AD 486; 486 CE; Events in 486; Births in 486; Deaths in 486
  • Frankish]] expansion

486         
Intel 486         
  • The 486DX2 architecture
  • first 486 system from the UK]] on the cover of BYTE, September 1989
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  • STMicroelectronics' ST ST486DX2-40
  • [[UMC Green CPU]] U5SX
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FAMILY OF 32-BIT MICROPROCESSORS INTRODUCED IN 1989, INCLUDING DX, SX AND SL MODELS
Intel 80486DX; 80486; Intel 486; Intel I486; 486 DX; 486DX; 80486DX; 80486SX; 486 processor; 486dx; Intel i486; Intel 80486 (microarchitecture); Intel i486 (Processor); 486 (PC); 486 (Intel); 486 (computing); 486 (computer); 80-486; SL-enhanced 486; I80486; 486 (CPU); Intel 80486; I486DX
<processor> (Or "i486", "iAPX 80486", and "Intel DX4" but usually just "486"). A range of Intel CISC microprocessors which is part of the Intel 80x86 family of processors. The 486s are very similar to their immediate predecessor, the Intel 80386DX. The main differences are that the 486 has an optimised instruction set, has an on-chip unified instruction and data cache, an optional on-chip floating-point unit (FPU), and an enhanced {bus interface unit}. These improvements yield a rough doubling in performance over an Intel 80386 at the same clock rate. There are several suffixes and variants including: Intel 486SX - a 486DX with its FPU disabled (see crippleware). Intel 486DX - 486SX with a working FPU. 486DX-2 - runs at twice the external clock rate. 486SX-2 - runs at twice the external clock rate. 486SL - 486DX with power conservation circuitry. 486SL-NM - 486SX with power conservation circuitry; SL enhanced suffix, denotes a 486 with special power conservation circuitry similar to that in the 486SL processors. 487 - 486DX with a slightly different pinout for use in 486SX systems. OverDrive - 486DX-2 with a slightly different pinout for use in 486SX systems. RapidCAD - 486DX in a special package with a companion FPU dummy package for use in Intel 80386 systems. Intel DX4, Cyrix Cy486SLC. External clock rates include 16MHz, 20MHz, 25MHz, 33MHz, 40MHz, although 16Mhz is rare now, and the 20MHz processors are often clock doubled. The 486 processor has been licensed or reverse engineered by other companies such as IBM, AMD, Cyrix, and {Chips & Technologies}. Some are almost exact duplicates in specications and performance, some aren't. The successor to the 486 is the Pentium. (1995-02-21)
80486         
  • The 486DX2 architecture
  • first 486 system from the UK]] on the cover of BYTE, September 1989
  • 80px
  • 80px
  • 80px
  • 80px
  • 80px
  • 80px
  • 80px
  • 80px
  • upright=0.5
  • 80px
  • 80px
  • 80px
  • 80px
  • 80px
  • STMicroelectronics' ST ST486DX2-40
  • [[UMC Green CPU]] U5SX
  • 80px
FAMILY OF 32-BIT MICROPROCESSORS INTRODUCED IN 1989, INCLUDING DX, SX AND SL MODELS
Intel 80486DX; 80486; Intel 486; Intel I486; 486 DX; 486DX; 80486DX; 80486SX; 486 processor; 486dx; Intel i486; Intel 80486 (microarchitecture); Intel i486 (Processor); 486 (PC); 486 (Intel); 486 (computing); 486 (computer); 80-486; SL-enhanced 486; I80486; 486 (CPU); Intel 80486; I486DX

Wikipedia

486

Year 486 (CDLXXXVI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Basilius and Longinus (or, less frequently, year 1239 Ab urbe condita). The denomination 486 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Examples of use of 486
1. "Since then, approximately 500,000 American babies have been killed with RU–486," Perkins wrote.
2. In 1''6, parliament voted to place control of RU–486 with the federal health minister.
3. After all, at last count, foreign direct investment in the United States amounted to $486 billion.
4. Of 26 women who voted, 23 supported the RU–486 bill.
5. "RU–486 is not like taking an aspirin for a headache.