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Cyrix 5x86-120GP. The Cyrix 5x86 is a line of x86 microprocessors designed by Cyrix and released on June 5 of 1995. [1] [2] [3] Cyrix, being a fabless company, had the chips manufactured by IBM. The line came out about 5 months before the more famous Cyrix 6x86. The Cyrix 5x86 was one of the fastest CPUs ever produced for Socket 3 computer systems.
IBM Servers; PowerPC architecture (powerpc): IBM's Cell; Most pre-Intel Apple computers (all PCI-based Power Macintoshes, limited support for the older NuBus Power Macs) Clones of the PCI Power Mac marketed by Power Computing, UMAX and Motorola; Amigas upgraded with a "Power-UP" card (such as the Blizzard or CyberStorm)
Uses 0F 7E encoding on Cyrix 486, 5x86, 6x86 and ZFx86. Uses 0F 38 encoding on Cyrix 6x86MX, MII, MediaGX and Geode. Cyrix 486S [11] and later processors - not available on older Cyrix 486SLC/DLC/SRx2/DRx2 processors. Not available on any Ti486 processors. 0F 38: RDSHR r/m32: 0F 36 /0 [d] Read SMM Header Pointer Register Cyrix 6x86MX [48] and MII
Below is the full 8086/8088 instruction set of Intel (81 instructions total). [2] These instructions are also available in 32-bit mode, in which they operate on 32-bit registers (eax, ebx, etc.) and values instead of their 16-bit (ax, bx, etc.) counterparts.
Cyrix 5x86 (M1sc) was a cost-reduced version of the flagship 6x86 (M1). Like Intel's Pentium Overdrive, the Cyrix 5x86 used a 32-bit external data bus. While AMD's Am5x86 was little more than a clock-quadrupled 486 with a new name, Cyrix's 5x86 implemented some Pentium-like features. Cyrix 6x86-P166
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The IBM Personal Computer, commonly known as the IBM PC, spanned multiple models in its first generation (including the PCjr, the Portable PC, the XT, the AT, the Convertible, and the /370 systems, among others), from 1981 to 1987. It eventually gave way to many splintering product lines after IBM introduced the Personal System/2 in April 1987.
NexGen, Inc. was a private semiconductor company based in Milpitas, California, that designed x86 microprocessors until it was purchased by AMD on January 16, 1996. [1] NexGen was a fabless design house that designed its chips but relied on other companies for production.