Cyrix 5x86

Historia

The 5x86 processor 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 processors 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 Cyrix 5x86 processor is an example of Cyrixs 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 its installed in a P24D socket on a 486 motherboard, the motherboard must have a BIOS that will support the 5x86.