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The Intel 486, officially named i486 and also known as 80486, is a microprocessor introduced in 1989. It is a higher-performance follow-up to the Intel 386.It represents the fourth generation of binary compatible CPUs following the 8086 of 1978, the Intel 80286 of 1982, and 1985's i386.
The 386 was the central processing unit (CPU) of many workstations and high-end personal computers of the time. The 386 began to fall out of public use starting with the release of the i486 processor in 1989, while in embedded systems the 386 remained in widespread use until Intel finally discontinued it in 2007.
The Intel i486SL is the power-saving variant of the i486DX microprocessor. [1] The SL was designed for use in mobile computers. It was produced between November 1992 and June 1993. Clock speeds available were 20, 25 and 33 MHz. The i486SL contained all features of the i486DX.
Intel DX4 100 MHz Voltage converter for DX4 processors (5 V to 3.3 V) An IntelDX4 FC80486DX4-75 SX883 75 MHz (3× 25 MHz) 16 KB cache L1 WT. This unit was made in January 1995, and was taken from a Toshiba laptop. Intel DX4 Overdrive. IntelDX4 is a clock-tripled i486 microprocessor with 16 KB level 1 cache. [1]
C&T also developed a 386-compatible processor known as the Super386. This processor supports, in addition to the basic Intel 386 instruction set, a number of instructions to support the Super386-specific "SuperState V" system-management feature. The added instructions for "SuperState V" are: [7]
The Personal System/2 Model 70 386 and Personal System/2 Model 70 486 are midrange desktop computers in IBM's Personal System/2 (PS/2) family of personal computers. The PS/2 Model 70 386, released in June 1988, features an Intel 386 microprocessor clocked between 16 MHz and 25 MHz (depending on the submodel) and features the 32-bit Micro Channel architecture (MCA) bus; the Model 70 486 ...