Figure 29. Contents Of Eax Register Returned By Function 1; Table 29. Processor Signatures For Amd-K6™ Processors - AMD -K6-2/450 - MHz Processor Application Note

Embedded AMD-K6™ Processors BIOS Design Guide
31
Reserved
Instruction Family
Model
Stepping

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)
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
Preliminary Information
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.
11–8
7–4
3–0
Instruction
Model
Family
0101b (5h) 0111b (7h)
0101b (5h) 1000b (8h)
0101b (5h) 1001b (9h)
0101b (5h) 1101b (Dh)
Embedded AMD Processor Recognition
23913A/0—November 2000
12 11 8 7 4 3 0
1
Stepping ID
xxxx
xxxx
xxxx
xxxx