Vol. 3 9-3
PROCESSOR MANAGEMENT AND INITIALIZATION
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
MXCSR Pwr up or Reset: 1F80H
INIT: Unchanged
Pentium III processor only-
Pwr up or Reset: 1F80H
INIT: Unchanged
NA
GDTR, IDTR Base = 00000000H
Limit = FFFFH
AR = Present, R/W
Base = 00000000H
Limit = FFFFH
AR = Present, R/W
Base = 00000000H
Limit = FFFFH
AR = Present, R/W
Table 9-1. IA-32 Processor States Following Power-up, Reset, or INIT (Contd.)
Register Pentium 4 and Intel
Xeon Processor
P6 Family Processor Pentium Processor