Cyrix Cx486DLC

The Cyrix Cx486DLC 1992 was one of the first CPUs from Cyrix ( Cx486 series) and should provide a " big brother " of the Cx486SLC the Intel chips i486SX and i486DX competition.

  • 4.1 Cx486DLC
  • 4.2 Cx486DRx ²

Cx486DLC & Cx48SDLC

Similarities

  • Texas Instruments also sold by this CPU its own version called TI486SXL. As with Cx486SLC this CPU had 8KB L1 cache instead of the original 1 KiB.
  • Hybrid CPU: properties of a current CPU, but socket - compatible with its predecessor.
  • Instruction set of the 80486
  • No built-in math coprocessor
  • Can use an external math coprocessor
  • Clock frequency: 25, 33 and 40 MHz

Differences

  • Full 32 - bit ( no bus limitation on 16- bit)
  • Performance at 33 MHz compared to 25 MHz 486SX in

History

The Cyrix Cx486DLC was introduced in 1992. The success at major OEMs was modest, but the processor was among enthusiasts known to be able to compete with an Intel 486SX -25 (similar to the AMD 386DX -40). For this he was sometimes used as a substitute for a slightly faster 80386 CPU. As the prices of Intel CPUs fell, it was difficult to keep the DLC and SLC chips competitive. Cyrix therefore led in September 1993 to a pin-compatible Cx486DRx ².

Cx486DRx ²

The Cx486DRx ² was an improved version of the Cx486DLC and was now internally - like the i486DX2 - at twice the clock frequency. This clock speeds were now possible to 66 MHz, this CPU was therefore mostly used for upgrading older 80386 PCs.

Model data

Cx486DLC

  • Code Name:
  • Sold as: Cyrix Cx486DLC & Texas Instrument TX486DLC
  • L1 cache: 1 KiB (unified )
  • L2 - Cache: depending on the motherboard or chipset used
  • Socket for 80386 CPUs with a front side bus 16-33 MHz
  • Operation voltage ( Vcore ): 5.0 V
  • Release Date: June 1992
  • Manufacturing Technology:
  • The size? mm ² to 0.6 million transistors
  • Clock rates: 20, 33 and 40 MHz

Cx486DRx ²

  • Code Name:
  • Sold as: Cyrix Cx486DRx ² ² Cx486DRu
  • L1 cache: 1 KiB (unified )
  • L2 - Cache: depending on the motherboard or chipset used
  • Socket for 80386 CPUs with a front side bus 16-33 MHz
  • Operation voltage ( Vcore ): 5.0 V
  • Release Date: September 1993
  • Manufacturing Technology:
  • The size? mm ² to 0.6 million transistors
  • Clock rates: 32 to 66 MHz
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