Cyrix Cx486DLC

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Cyrix Cx486DLC

The Cyrix Cx486DLC was one of the first CPUs from Cyrix ( Cx486 series ) in 1992 and, as the "big brother" of the Cx486SLC, should compete with the Intel i486SX and i486DX chips .

Cx486DLC & Cx486SLC

Similarities

  • Texas Instruments also sold its own version of this CPU called TI486SXL. As with the Cx486SLC, this CPU had an 8  KiB L1 cache instead of the original 1  KiB .
  • Hybrid CPU: Properties of a current CPU, but socket-compatible with the predecessor.
  • Command set of the 80486
  • no integrated math coprocessor
  • can use an external math coprocessor
  • Clock frequencies: 25, 33 and 40 MHz

differences

  • Full 32-bit (no bus restriction to 16-bit)
  • Performance at 33 MHz comparable to 486SX at 25 MHz

history

The Cyrix Cx486DLC was introduced in 1992. Success with large OEMs was modest, but the processor was known among enthusiasts for being able to compete with an Intel 486SX-25 (similar to the AMD 386DX-40 ). Because of this, it was sometimes used as a slightly faster replacement for an 80386 CPU. As the prices of Intel CPUs fell, it became difficult to keep the DLC and SLC chips competitive. Cyrix therefore introduced the pin-compatible Cx486DRx² in September 1993 .

Cx486DRx²

The Cx486DRx² was an improved version of the Cx486DLC and now ran internally - similar to the i486DX2 - with twice the clock frequency. This enabled clock rates of up to 66 MHz, which is why this CPU was mostly used to upgrade older 80386 PCs.

Model data

Cx486DLC

A Cyrix Cx486DLC (Cx486DLC-33GP)
TX486DLC from Texas Instruments.
  • Code name:
  • Sold as: Cyrix Cx486DLC & Texas Instrument TX486DLC
  • L1 cache: 1  KiB (unified)
  • L2 cache: depending on the mainboard or chipset used
  • Socket for 80386 CPUs with a front side bus from 16 to 40 MHz
  • Operating voltage (VCore): 5.0 V.
  • Release DATE: June 1992
  • Manufacturing engineering:
  • The size:? mm² with 0.6 million transistors
  • Clock rates: 20, 33 and 40 MHz

Cx486DRx²

Cyrix 486DRx².
  • Code name:
  • Sold as: Cyrix Cx486DRx², Cx486DRu²
  • L1 cache: 1  KiB (unified)
  • L2 cache: depending on the mainboard or chipset used
  • Socket for 80386 CPUs with a front side bus from 16 to 33 MHz
  • Operating voltage (VCore): 5.0 V.
  • Release DATE: September 1993
  • Manufacturing engineering:
  • The size:? mm² with 0.6 million transistors
  • Clock rates: 32 to 66 MHz

See also