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AMD-K6-2E/233AMZ Datasheet(PDF) 236 Page - Advanced Micro Devices

Part # AMD-K6-2E/233AMZ
Description  AMD-K6??2E Embedded Processor
PDF  332 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AMD-K6-2E/233AMZ Datasheet(HTML) 236 Page - Advanced Micro Devices

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218
System Management Mode (SMM)
Chapter 11
AMD-K6™-2E Processor Data Sheet
22529B/0—January 2000
Preliminary Information
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
co ns is ts o f a 6 4 -K by te area , be twee n 0 0 0 3 _0 00 0h and
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 addr ess — is a t 0003_ 0000h. T h e top 512 b y te s
(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.
Figure 81. SMM Memory
SMM
State-Save
Area
SMM Base Address (CS)
Service Routine Entry Point
Fill Down
SMM
Service Routine
32-Kbyte
Minimum RAM
0003_8000h
0003_FE00h
0003_FFFFh
0003_0000h



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