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Intel architecture ia-32 Manual Do Utilizador

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Vol. 3A 9-3
PROCESSOR MANAGEMENT AND INITIALIZATION
Table 9-1.  IA-32 Processor States Following Power-up, Reset, or INIT 
Register
Pentium 4 and Intel Xeon 
Processor
P6 Family Processor
Pentium Processor
EFLAGS
1
00000002H
00000002H
00000002H
EIP
0000FFF0H
0000FFF0H
0000FFF0H
CR0
60000010H
2
60000010H
2
60000010H
2
CR2, CR3, CR4
00000000H
00000000H
00000000H
CS
Selector = F000H
Base = FFFF0000H
Limit = FFFFH
AR = Present, R/W, 
Accessed
Selector = F000H
Base = FFFF0000H
Limit = FFFFH
AR = Present, R/W, 
Accessed
Selector = F000H
Base = FFFF0000H
Limit = FFFFH
AR = Present, R/W, 
Accessed
SS, DS, ES, FS, 
GS
Selector = 0000H
Base = 00000000H
Limit = FFFFH
AR = Present, R/W, 
Accessed
Selector = 0000H
Base = 00000000H
Limit = FFFFH
AR = Present, R/W, 
Accessed
Selector = 0000H
Base = 00000000H
Limit = FFFFH
AR = Present, R/W, 
Accessed
EDX
00000FxxH  
000n06xxH
3
 000005xxH 
EAX
0
4
0
4
0
4
EBX, ECX, ESI, 
EDI, EBP, ESP
00000000H
00000000H
00000000H
ST0 through 
ST7
5
Pwr up or Reset: +0.0
FINIT/FNINIT: Unchanged
Pwr up or Reset: +0.0
FINIT/FNINIT: Unchanged
Pwr up or Reset: +0.0
FINIT/FNINIT: Unchanged
x87 FPU Control 
Word
5
Pwr up or Reset: 0040H
FINIT/FNINIT: 037FH
Pwr up or Reset: 0040H
FINIT/FNINIT: 037FH
Pwr up or Reset: 0040H
FINIT/FNINIT: 037FH
x87 FPU Status 
Word
5
Pwr up or Reset: 0000H
FINIT/FNINIT: 0000H
Pwr up or Reset: 0000H
FINIT/FNINIT: 0000H
Pwr up or Reset: 0000H
FINIT/FNINIT: 0000H
x87 FPU Tag 
Word
5
Pwr up or Reset: 5555H
FINIT/FNINIT: FFFFH
Pwr up or Reset: 5555H
FINIT/FNINIT: FFFFH
Pwr up or Reset: 5555H
FINIT/FNINIT: FFFFH
x87 FPU Data 
Operand and CS 
Seg. Selectors
5
Pwr up or Reset: 0000H
FINIT/FNINIT: 0000H
Pwr up or Reset: 0000H
FINIT/FNINIT: 0000H
Pwr up or Reset: 0000H
FINIT/FNINIT: 0000H
x87 FPU Data 
Operand and 
Inst. Pointers
5
Pwr up or Reset: 
   00000000H
FINIT/FNINIT: 00000000H
Pwr up or Reset: 
   00000000H
FINIT/FNINIT: 00000000H
Pwr up or Reset: 
   00000000H
FINIT/FNINIT: 
00000000H
MM0 through 
MM7
5
Pwr up or Reset:
   0000000000000000H
INIT or FINIT/FNINIT:
   Unchanged
Pentium II and Pentium III 
Processors Only—
Pwr up or Reset:
   0000000000000000H
INIT or FINIT/FNINIT:
   Unchanged
Pentium with MMX 
Technology Only—
Pwr up or Reset:
   0000000000000000H
INIT or FINIT/FNINIT:
   Unchanged
XMM0 through 
XMM7
Pwr up or Reset:
   0000000000000000H
INIT: Unchanged
Pentium III processor 
Only—
Pwr up or Reset:
   0000000000000000H
INIT: Unchanged
NA