IBM 6x86/6x86MX

 80486◄ 6x86


The Cyrix 6x86 (codename M1) is a sixth-generation, 32-bit x86-compatible microprocessor designed by Cyrix and manufactured by IBM and SGS-Thomson. It was originally released in 1996.

The 6x86 is superscalar and superpipelined and performs register renaming, speculative execution, out-of-order execution, and data dependency removal. However, it continued to use native x86 execution and ordinary microcode only, like Centaur's WinChip, unlike competitors Intel and AMD which introduced the method of dynamic translation to micro-operations with Pentium Pro and K5.

 

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IBM 6x86

IBM 6x86 P150+

IBM26 6x86-2V2P150GE
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IBM 6x86 P166+

IBM26 6x86-2V2P166GE
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IBM 6x86L PR200+

IBM26 6x86L-2VAP200GB
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IBM 6x86MX

Another release of the 6x86, the 6x86MX, added MMX compatibility, introduced the EMMI instruction set, and quadrupled the primary cache size to 64 KB. Later revisions of this chip were renamed MII, to better compete with the Pentium II processor.

IBM 6x86MX PR166

IBM26x86MX-AVAPR166GB
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IBM 6x86MX PR233

IBM26x86MX-CVAPR233GE
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IBM 6x86MX PR300

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IBM26x86MX-DVAPR300HF
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Unlisted models:

  • 6x86(L): P90+, P100+, P120+, P133+
  • 6x86MX: PR200, PR266, PR333

 

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