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  1. i486SX - Wikipedia

    It was a modified Intel i486DX microprocessor with its floating-point unit (FPU) disabled. It was intended as a lower-cost CPU for use in low-end systems—selling for US$ 258—adapting the …

  2. i486 - Wikipedia

    In fall of 1991, Intel introduced the 50 MHz i486 DX using the three layer 800 nm process CHMOS-V technology. They were available for US$665 in 1,000-unit quantities. [9] In that …

  3. 486SX vs 486DX: A closer look - The Silicon Underground

    Apr 3, 2024 · The 486SX vs 486DX was a marketing game. Intel disabled the FPU on the 486 to make the SX. In this blog post, we explore why Intel did this.

  4. Intel 486SX Microprocessor - National MagLab

    Intel 486SX Microprocessor. While the 80486 (DX version) is basically an enhanced 386 with an internal cache and math coprocessor, the Intel 486SX is the "economy model" lacking the …

  5. 2.03 What is the difference between the 386SX/386DX and 486SX

    The Intel386DX contains full 32 bit buses for external data, internal data, and address. The Intel386SX contains a smaller 16 bit external data bus, and a smaller 24 bit address bus. The …

  6. Intel 486SX - Tiny Transistors

    Nov 21, 2020 · In late 1991, Intel introduced a low-cost version called the 486SX, and renamed the original processor 486DX. The only difference between the two was the presence of the …

  7. 32-bit RISC-Technology Core — The embedded Intel486 SX processor performs a complete set of arithmetic and logical operations on 8-, 16-, and 32-bit data types using a full-width ALU and …

  8. Intel 80486SX | IT History Society

    Intel's i486SX was a modified Intel 486DX microprocessor with its floating-point unit (FPU) disconnected. All early 486SX chips were actually i486DX chips with a defective FPU.

  9. Intel OverDrive Part I: 486 OverDrive | OS/2 Museum

    Dec 13, 2015 · The 486SX was introduced in mid-1991, and its main purpose was to compete with faster 386 systems, especially those from AMD. At that time, the vast majority of software …

  10. Intel i486 SX - CPU collection

    The 486SX processors were the same as their DX counterparts in design, but the built in math co processor was disabled. There was a 487 which was actually a 486 with the math co …

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