The i486SX was a microprocessor originally released by Intel in 1991. 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 SX suffix of the earlier i386SX in order to connote a lower-cost option.

2024年4月3日 · Intel released the 486SX in April 1991 and retroactively created the 486DX to counter AMD’s new 386 clone CPU. The actual difference between the 486 DX and SX has …

2017年3月8日 · 80486（简称486或是i486）是英特尔第一个内部包含浮点运算器（FPU）的中央处理器芯片（DX版 CPU），并在x86系列中首次使用了RISC (精简指令集)技术，从而提升了每周期执行指令的速度。 486还采用了更进步的数据总线，大大提高了处理器与内存的数据交换速度。 由于这些改进，同样速度的i486DX的性能比拥有80387数学协处理器的80386快了两倍有余。 不过486SX早期的产品反而比80386高阶的产品还慢。 从80486 DX开始，浮点运算器开始内建于 …

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 Intel486DX contains a floating point unit, the Intel486SX does not.

1 天前 · Разработчик и энтузиаст ретро-ПК Ахмад Бьягови представил открытый проект по реверс-инжинирингу всех компонентов карманного ноутбука IBM PalmTop PC110. Устройство IBM PalmTop PC110 на базе Intel 486SX (33 МГц 80 486SX с пассивным ...

2020年11月21日 · 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 FPU: a 486SX system was much slower than a 486DX when performing floating-point calculations, but was otherwise identical.

2015年12月13日 · The 486SX was intended to get OEMs to roll out 486 CPUs (which only Intel produced at the time) in larger numbers, understandably at prices lower than the top-of-the-line DX variants.

ECS UM486/486SX is a motherboard based on the UMC UM82C480 (386/486 PC Chip Set) chipset. Get specs, BIOS, documentation and more!

Jetway 486SX/DX VERSION II is a motherboard based on the OPTi 82C495SX (LCWB PC/AT) chipset. Get specs, BIOS, documentation and more!

Intel i486（又称486, 80486）是Intel公司的一款CISC架构的x86 CPU。 i486的前身是 Intel 80386 处理器。 早期的486分为有协处理器的486DX和无协处理器的486SX两种，其价格也相差许多。