AMD AMD-K6-2/450 Design Guide - Page 74
Processor Signatures for AMD-K6™ Processors,
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Preliminary Information Embedded AMD-K6™ Processors BIOS Design Guide 23913A/0-November 2000 All AMD-K6 processor models belong to instruction family 5 (as returned in EAX by function 1). All AMD Athlon™ processor models belong to instruction family 6 (as returned in EAX by function 1). Figure 29 shows the contents of the EAX register obtained by function 1. Table 29 summarizes the specific processor signature values returned for AMD processors. 31 12 11 8 7 4 3 0 Reserved Instruction Family 11-8 Model 7-4 Stepping 3-0 Figure 29. Contents of EAX Register Returned by Function 1 Table 29. Processor Signatures for AMD-K6™ Processors Processor AMD-K6E Processor (Model 7) AMD-K6-2 Processor (Model 8) AMD-K6-2E Processor (Model 8) AMD-K6-III Processor (Model 9) AMD-K6-2E+ Processor (Model D) AMD-K6-IIIE+ Processor (Model D) Instruction Family 0101b (5h) 0101b (5h) 0101b (5h) 0101b (5h) Model 0111b (7h) 1000b (8h) 1001b (9h) 1101b (Dh) Stepping ID1 xxxx xxxx xxxx xxxx Notes: 1. Contact your AMD representative for the latest stepping information. Refer to Table 1 on page 2 for the range of allowable stepping IDs associated with each model number. 62 Embedded AMD Processor Recognition