AMD-K6-2E Datasheet, PDF (236/332 Pages) Advanced Micro Devices – AMD-K6™-2E Embedded Processor

AMD-K6™-2E Processor Data Sheet
Preliminary Information
22529B/0—January 2000
s A20M# is masked
s Interrupt vectors use the real-mode interrupt vector table
s The IF flag in EFLAGS is cleared (INTR not recognized)
s The TF flag in EFLAGS is cleared
s The NMI and INIT interrupts are disabled
s Debug register DR7 is cleared (debug traps disabled)
Figure 81 shows the default map of the SMM memory area. It
con sists of a 64 -Kbyte area, between 00 03 _0000h an d
0003_FFFFh, of which the top 32 Kbytes (0003_8000h to
0003_FFFFh) must be populated with RAM. The default
code-segment (CS) base address for the area—called the SMM
base address — is at 0003_0000h. The top 512 bytes
(0003_FE00h to 0003_FFFFh) contain a fill-down SMM
state-save area. The default entry point for the SMM service
routine is 0003_8000h.
Fill Down
SMM
State-Save
Area
0003_FFFFh
0003_FE00h
32-Kbyte
Minimum RAM
Service Routine Entry Point
SMM
Service Routine
0003_8000h
SMM Base Address (CS)
Figure 81. SMM Memory
0003_0000h
218
System Management Mode (SMM)
Chapter 11