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
EFLAGS100000002H 00000002H 00000002H
EIP 0000FFF0H 0000FFF0H 0000FFF0H
CR0 60000010H260000010H260000010H2
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 000n06xxH3 000005xxH
EAX 040404
EBX, ECX, ESI,
EDI, EBP, ESP 0000000 0H 00000000H 00000000H
ST0 through
ST75Pwr 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
Word5Pwr up or Reset: 0040H
FINIT/FNINIT: 037FH Pwr up or Reset: 00 40H
FINIT/FNINIT: 037FH Pwr up or Reset: 0040H
FINIT/FNINIT: 037FH
x87 FPU Status
Word5Pwr 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
Word5Pwr 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. Selectors5
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. Pointers5
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
MM75Pwr 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