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The ST 5x86 Processor
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The ST 5x86 is an ST made Cyrix 5x86 processor. The 5x86 utilizes efficient fifth-generation (Pentium class) architectural features to significantly improve performance while minimizing transistor count. It achieves this performance using a superpipelined architecture in the integer unit combined with data forwarding, branch prediction, a 16-KByte unified write-back cache, single-cycle instruction decode, and single-cycle execution.
The processor's built-in power-saving features automatically power down the Floating Point Unit (FPU) and other idle internal circuits, while the System Management Mode (SMM) conserves power flowing to system peripherals.
The ST/Cyrix 5x86 processor is an example of Cyrix's strategy to design next-generation processor architectures that leverage existing designs. It is available in a 168-pin PGA or a 208-pin QFP package with standard 486 pinout. Though it's installed in a P24D socket on a 486 motherboard, the motherboard must have a BIOS that will support the 5x86.
References:
Cyrix 5x86 Processor Brief
Cyrix 5x86 Processor FAQs |
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