This document is intended for 5x86 CPU system BIOS writers. It is not a stand-alone document but supplements other 5x86 CPU and Cyrix documentation, including the Cx486DX/DX2 Data Book, "Bus Interface Differences, 5x86 CPU versus Cx486DX/DX2 and Intel DX4", and the Cyrix SMM Programmer Guide. This document includes information on 5x86 CPU detection, configuration-register definition, and recommendations for configuration-register programming. This document discusses only the differences between the Cx486DX/DX2 and the 5x86 CPU that may affect BIOS programming.
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