AMD AMD-K6-2/450 Design Guide - Page 91
Function 8000_0006h - L2 Cache Information
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23913A/0-November 2000 Preliminary Information Embedded AMD-K6™ Processors BIOS Design Guide Function 8000_0006h - L2 Cache Information This function is only available on AMD-K6 processors models 9 and D. Input: EAX = 8000_0006h Output: EAX = Reserved EBX = Reserved ECX = L2 Unified Cache Information EDX = Reserved Function 8000_0006h returns information about the processor's L2 cache. Table 36 provides the format for the information returned by the 8000_0006h function. Table 36. ECX Format Returned by Function 8000_0006h L2 Cache Size (Kbytes) Associativity1 Lines per Tag ECX Bits 31-16 Bits 15-12 Bits 11-8 Notes: 1. See "Associativity for L2 Cache" on page 80 for more information Line Size (bytes) Bits 7-0 Function 8000_0007h - AMD PowerNow!™ Technology Information The AMD PowerNow! technology function for enhanced power management is available on low-power versions of the AMD-K6-2E+ and AMD-K6-IIIE+ processors, Model D. Input: EAX = 8000_0007h Output: EAX = Reserved EBX = Reserved ECX = Reserved EDX = EPM Flags Function 8000_0007h returns information about the processor's AMD PowerNow! technology support. Table 37 provides the format for the information returned by the 8000_0007h function. Table 37. EDX Format Returned by Function 8000_0007h AMD PowerNow!™ Technology Reserved Voltage ID Control EDX1 Bits 31-3 Bit 2 Notes: 1. A '1' indicates the feature is present, however the feature must still be enabled by software. Bus Divisor Control Bit 1 Reserved Bit 0 Appendix A 79