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MCG_rSI
SANDPILE.ORG -- X86 ARCHITECTURE -- TASK STATE SEGMENT 32-bit TSS : offset: 3 1: 3 0: 2 9: 2 8: 2 7: 2 6: 2 5: 2 4: 2 3: 2 2: 2 1: 2 0: 1 9: 1 8: 1 7: 1 6: 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0 +00h SANDPILE.ORG -- X86 ARCHITECTURE -- SYSTEM MANAGEMENT MODE traditional Intel P4 processor SMM state save map : offset: contents: size: notes: 7E00h: reserved: 196 bytes: 7EC4h: CR3: dword: copy dumped for unknown purposes: 7EC8h SANDPILE.ORG -- X86 ARCHITECTURE -- 1 BYTE OPCODES xxh x8h : x9h: xAh: xBh: xCh: xDh: xEh: xFh 0xh : OR Eb,Gb: OR Ev,Gv: OR Gb,Eb: OR Gv,Ev: OR AL,Ib: OR rAX,Iz: PUSH I64 CS: POP CS (8086/8088) #UD (80186/80188) SANDPILE.ORG -- X86 ARCHITECTURE -- STACK FRAME notes #1: only if transfer from different CPL #2: only if PARAMCOUNTfield is non-zero
SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY STUFF FERR# and IGNNE# For legacy purposes, today's x86 processors support the FERR# output signal and the IGNNE# input signal. In general the FERR# signal represents the state of SANDPILE.ORG -- X86 ARCHITECTURE -- DATATYPES 255224: 223192: 191160: 159128: 12796: 9564: 6332: 310: dword: dword: dword: dword: dword: dword: dword: dword SANDPILE.ORG -- X86 ARCHITECTURE -- PROCESSOR MODE processor paging : name: EFER.LMA: CR0.PG: CR4.PAE: CR4.PSE: PDE.PS: page size: table levels: modes: NONE: 0: 0: n/a: n/a: n/a: n/a: n/a: RM, VM, PM: 4K: 1: 0: 0: n/a SANDPILE.ORG -- X86 ARCHITECTURE -- OPCODE ENCODING lower case letters : 1: 2: 4: 8: 16: 32: 64 : byte: word: dword: qword: oword: yword: zword: x = oword or yword upper = yword or zword normal = oword or yword or zword half = qword or oword or yword fourth = dword or qword or oword: o. eighth = word or dword or qword: o. v = word or dword or qword: z = word or dword or dword: y = dword or qword: p SANDPILE.ORG -- X86 ARCHITECTURE -- CONDITION CODES condition codes : bits: cc: condition(s) 3: 2: 1: 0: 0: 0: 0: 0: O: overflow: 0: 0: 0: 1: NO: no overflow: 0: 0: 1: 0: B (NAE, C) u n s i g n e d: below (not above or SANDPILE.ORG -- X86 ARCHITECTURE -- MODEL SPECIFIC REGISTERS MCA Extended State Registers : name: 6 3 : 0 MCG_rAX 0000_0180h rAX MCG_rBX 0000_0181h rBX MCG_rCX 0000_0182h rCX MCG_rDX 0000_0183h rDXMCG_rSI
SANDPILE.ORG -- X86 ARCHITECTURE -- TASK STATE SEGMENT 32-bit TSS : offset: 3 1: 3 0: 2 9: 2 8: 2 7: 2 6: 2 5: 2 4: 2 3: 2 2: 2 1: 2 0: 1 9: 1 8: 1 7: 1 6: 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0 +00h SANDPILE.ORG -- X86 ARCHITECTURE -- SYSTEM MANAGEMENT MODE traditional Intel P4 processor SMM state save map : offset: contents: size: notes: 7E00h: reserved: 196 bytes: 7EC4h: CR3: dword: copy dumped for unknown purposes: 7EC8h SANDPILE.ORG -- X86 ARCHITECTURE -- 1 BYTE OPCODES xxh x8h : x9h: xAh: xBh: xCh: xDh: xEh: xFh 0xh : OR Eb,Gb: OR Ev,Gv: OR Gb,Eb: OR Gv,Ev: OR AL,Ib: OR rAX,Iz: PUSH I64 CS: POP CS (8086/8088) #UD (80186/80188) SANDPILE.ORG -- X86 ARCHITECTURE -- STACK FRAME notes #1: only if transfer from different CPL #2: only if PARAMCOUNTfield is non-zero
SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY STUFF FERR# and IGNNE# For legacy purposes, today's x86 processors support the FERR# output signal and the IGNNE# input signal. In general the FERR# signal represents the state of SANDPILE.ORG -- X86 ARCHITECTURE -- DATATYPES 255224: 223192: 191160: 159128: 12796: 9564: 6332: 310: dword: dword: dword: dword: dword: dword: dword: dword SANDPILE.ORG -- X86 ARCHITECTURE -- GENERAL PURPOSE REGISTERS traditional general purpose registers : 6 3 : 3 2: 3 1 : 1 6: 1 5 : 8: 7 : 0: RAX or R0: zero-extended: EAX or R0D: preserved: preserved: AX or R0W: AH: AL or R0B SANDPILE.ORG -- X86 ARCHITECTURE -- PROCESSOR MODE processor paging : name: EFER.LMA: CR0.PG: CR4.PAE: CR4.PSE: PDE.PS: page size: table levels: modes: NONE: 0: 0: n/a: n/a: n/a: n/a: n/a: RM, VM, PM: 4K: 1: 0: 0: n/a SANDPILE.ORG -- X86 ARCHITECTURE -- SYSTEM MANAGEMENT MODE traditional Intel P4 processor SMM state save map : offset: contents: size: notes: 7E00h: reserved: 196 bytes: 7EC4h: CR3: dword: copy dumped for unknown purposes: 7EC8h SANDPILE.ORG -- X86 ARCHITECTURE -- SEGMENT REGISTERS x86 architecture segment registers CS, SS, DS, ES, FS, GS : 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0: internal descriptor cache: CS for a segment or SANDPILE.ORG -- X86 ARCHITECTURE -- CONTROL REGISTERS CR015 : name: 6 3: 6 2: 6 1: 6 0: 5 9: 5 8: 5 7: 5 6: 5 5: 5 4: 5 3: 5 2: 5 1: 5 0: 4 9: 4 8: 4 7: 4 6: 4 5: 4 4: 4 3: 4 2: 4 1: 4 0: 3 9: 3 8: 3 7: 3 6: 3 5: 3 4 SANDPILE.ORG -- X86 ARCHITECTURE -- TABLE REGISTERS x86 architecture table registers GDTR, IDTR, LDTR, TR : 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0: internal descriptorcache: GDTR
SANDPILE.ORG -- X86 ARCHITECTURE -- INTERRUPTS external interrupt suppression : SUPPRESS_INTERRUPTS flags #1,#2: name: STI: POP SS: MOV SS,Ew: RESET: no: no: no: STPCLK #3: no: no: no: INIT: yes #4: yes #4: yes #4 SANDPILE.ORG -- X86 ARCHITECTURE -- RFLAGS REGISTER undefined integer FLAGS behavior : instruction: P5 core : P6 core #0: P4 core : case: OF: SF: ZF: AF: PF: CF: OF: SF: ZF: AF: PF: CF: OF: SF: ZF: AF: PF: CF: AAA SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY STUFF FERR# and IGNNE# For legacy purposes, today's x86 processors support the FERR# output signal and the IGNNE# input signal. In general the FERR# signal represents the state of SANDPILE.ORG -- X86 ARCHITECTURE -- DATATYPES 255224: 223192: 191160: 159128: 12796: 9564: 6332: 310: dword: dword: dword: dword: dword: dword: dword: dword SANDPILE.ORG -- X86 ARCHITECTURE -- 3DNOW! OPCODES sandpile.org -- x86 architecture -- 3DNow! opcodes. x86 architecture. 3DNow! opcodes. note: AMD abandoned 3DNow! as well as enhanced 3DNow! with their Family 15h processors, and only supports PREFETCHx now. The PREFETCHx instruction is using the reg field of the mod R/M byte to determine the desired prefetch type (x). 0Fh xxh. SANDPILE.ORG -- X86 ARCHITECTURE -- PROCESSOR MODE processor paging : name: EFER.LMA: CR0.PG: CR4.PAE: CR4.PSE: PDE.PS: page size: table levels: modes: NONE: 0: 0: n/a: n/a: n/a: n/a: n/a: RM, VM, PM: 4K: 1: 0: 0: n/a SANDPILE.ORG -- X86 ARCHITECTURE -- MODEL SPECIFIC REGISTERS MCA Extended State Registers : name: 6 3 : 0 MCG_rAX 0000_0180h rAX MCG_rBX 0000_0181h rBX MCG_rCX 0000_0182h rCX MCG_rDX 0000_0183h rDXMCG_rSI
SANDPILE.ORG -- X86 ARCHITECTURE -- SYSTEM MANAGEMENT MODE traditional Intel P4 processor SMM state save map : offset: contents: size: notes: 7E00h: reserved: 196 bytes: 7EC4h: CR3: dword: copy dumped for unknown purposes: 7EC8h SANDPILE.ORG -- X86 ARCHITECTURE -- CONDITION CODES condition codes : bits: cc: condition(s) 3: 2: 1: 0: 0: 0: 0: 0: O: overflow: 0: 0: 0: 1: NO: no overflow: 0: 0: 1: 0: B (NAE, C) u n s i g n e d: below (not above or SANDPILE.ORG -- X86 ARCHITECTURE -- OPCODE ENCODING lower case letters : 1: 2: 4: 8: 16: 32: 64 : byte: word: dword: qword: oword: yword: zword: x = oword or yword upper = yword or zword normal = oword or yword or zword half = qword or oword or yword fourth = dword or qword or oword: o. eighth = word or dword or qword: o. v = word or dword or qword: z = word or dword or dword: y = dword or qword: p SANDPILE.ORG -- X86 ARCHITECTURE -- CONTROL REGISTERS CR015 : name: 6 3: 6 2: 6 1: 6 0: 5 9: 5 8: 5 7: 5 6: 5 5: 5 4: 5 3: 5 2: 5 1: 5 0: 4 9: 4 8: 4 7: 4 6: 4 5: 4 4: 4 3: 4 2: 4 1: 4 0: 3 9: 3 8: 3 7: 3 6: 3 5: 3 4 SANDPILE.ORG -- X86 ARCHITECTURE -- TASK STATE SEGMENT 32-bit TSS : offset: 3 1: 3 0: 2 9: 2 8: 2 7: 2 6: 2 5: 2 4: 2 3: 2 2: 2 1: 2 0: 1 9: 1 8: 1 7: 1 6: 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0 +00h SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY STUFF FERR# and IGNNE# For legacy purposes, today's x86 processors support the FERR# output signal and the IGNNE# input signal. In general the FERR# signal represents the state of SANDPILE.ORG -- X86 ARCHITECTURE -- DATATYPES 255224: 223192: 191160: 159128: 12796: 9564: 6332: 310: dword: dword: dword: dword: dword: dword: dword: dword SANDPILE.ORG -- X86 ARCHITECTURE -- 3DNOW! OPCODES sandpile.org -- x86 architecture -- 3DNow! opcodes. x86 architecture. 3DNow! opcodes. note: AMD abandoned 3DNow! as well as enhanced 3DNow! with their Family 15h processors, and only supports PREFETCHx now. The PREFETCHx instruction is using the reg field of the mod R/M byte to determine the desired prefetch type (x). 0Fh xxh. SANDPILE.ORG -- X86 ARCHITECTURE -- PROCESSOR MODE processor paging : name: EFER.LMA: CR0.PG: CR4.PAE: CR4.PSE: PDE.PS: page size: table levels: modes: NONE: 0: 0: n/a: n/a: n/a: n/a: n/a: RM, VM, PM: 4K: 1: 0: 0: n/a SANDPILE.ORG -- X86 ARCHITECTURE -- MODEL SPECIFIC REGISTERS MCA Extended State Registers : name: 6 3 : 0 MCG_rAX 0000_0180h rAX MCG_rBX 0000_0181h rBX MCG_rCX 0000_0182h rCX MCG_rDX 0000_0183h rDXMCG_rSI
SANDPILE.ORG -- X86 ARCHITECTURE -- SYSTEM MANAGEMENT MODE traditional Intel P4 processor SMM state save map : offset: contents: size: notes: 7E00h: reserved: 196 bytes: 7EC4h: CR3: dword: copy dumped for unknown purposes: 7EC8h SANDPILE.ORG -- X86 ARCHITECTURE -- CONDITION CODES condition codes : bits: cc: condition(s) 3: 2: 1: 0: 0: 0: 0: 0: O: overflow: 0: 0: 0: 1: NO: no overflow: 0: 0: 1: 0: B (NAE, C) u n s i g n e d: below (not above or SANDPILE.ORG -- X86 ARCHITECTURE -- OPCODE ENCODING lower case letters : 1: 2: 4: 8: 16: 32: 64 : byte: word: dword: qword: oword: yword: zword: x = oword or yword upper = yword or zword normal = oword or yword or zword half = qword or oword or yword fourth = dword or qword or oword: o. eighth = word or dword or qword: o. v = word or dword or qword: z = word or dword or dword: y = dword or qword: p SANDPILE.ORG -- X86 ARCHITECTURE -- CONTROL REGISTERS CR015 : name: 6 3: 6 2: 6 1: 6 0: 5 9: 5 8: 5 7: 5 6: 5 5: 5 4: 5 3: 5 2: 5 1: 5 0: 4 9: 4 8: 4 7: 4 6: 4 5: 4 4: 4 3: 4 2: 4 1: 4 0: 3 9: 3 8: 3 7: 3 6: 3 5: 3 4 SANDPILE.ORG -- X86 ARCHITECTURE -- TASK STATE SEGMENT 32-bit TSS : offset: 3 1: 3 0: 2 9: 2 8: 2 7: 2 6: 2 5: 2 4: 2 3: 2 2: 2 1: 2 0: 1 9: 1 8: 1 7: 1 6: 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0 +00h SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY STUFF FERR# and IGNNE# For legacy purposes, today's x86 processors support the FERR# output signal and the IGNNE# input signal. In general the FERR# signal represents the state of SANDPILE.ORG -- X86 ARCHITECTURE -- DATATYPES 255224: 223192: 191160: 159128: 12796: 9564: 6332: 310: dword: dword: dword: dword: dword: dword: dword: dword SANDPILE.ORG -- X86 ARCHITECTURE -- REFERENCE DOCUMENTS PDF. SDM vol 2C (V-Z) 326018-074. 04/21. PDF. older. PDF. SDM vol 2D(SMX) 334569-074.
SANDPILE.ORG -- X86 ARCHITECTURE -- GENERAL PURPOSE REGISTERS traditional general purpose registers : 6 3 : 3 2: 3 1 : 1 6: 1 5 : 8: 7 : 0: RAX or R0: zero-extended: EAX or R0D: preserved: preserved: AX or R0W: AH: AL or R0B SANDPILE.ORG -- X86 ARCHITECTURE -- PROCESSOR MODE processor paging : name: EFER.LMA: CR0.PG: CR4.PAE: CR4.PSE: PDE.PS: page size: table levels: modes: NONE: 0: 0: n/a: n/a: n/a: n/a: n/a: RM, VM, PM: 4K: 1: 0: 0: n/a SANDPILE.ORG -- X86 ARCHITECTURE -- TASK STATE SEGMENT 32-bit TSS : offset: 3 1: 3 0: 2 9: 2 8: 2 7: 2 6: 2 5: 2 4: 2 3: 2 2: 2 1: 2 0: 1 9: 1 8: 1 7: 1 6: 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0 +00h SANDPILE.ORG -- X86 ARCHITECTURE -- CONTROL REGISTERS CR015 : name: 6 3: 6 2: 6 1: 6 0: 5 9: 5 8: 5 7: 5 6: 5 5: 5 4: 5 3: 5 2: 5 1: 5 0: 4 9: 4 8: 4 7: 4 6: 4 5: 4 4: 4 3: 4 2: 4 1: 4 0: 3 9: 3 8: 3 7: 3 6: 3 5: 3 4 SANDPILE.ORG -- X86 ARCHITECTURE -- CPUID Before trying to rely upon CPUID, a program must properly detect and sometimes enable the instruction. In particular, the program must detect the presence of SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY FLOATING-POINT FP/MMX/3DNow! registers : 7 9: 7 8 : 6 4: 6 3 0 : S i g n B i t s: ST(0) Exponent: ST(0) Significand or MM0: ST(1) Exponent: ST(1) Significand or MM1: ST(2) Exponent: ST(2) Significand or MM2 SANDPILE.ORG -- X86 ARCHITECTURE -- 3 BYTE OPCODES pre-fix & OC0: 0Fh 24h xxh x0h : x1h: x2h: x3h: x4h: x5h: x6h: x7h: n/a OC0 =0: 0xh: FMADDPS VDo,VDo,Vo,Wo (SSE5A) FMADDPD VDo,VDo,Vo,Wo (SSE5A) FMADDSS VDd,VDd,Vd,Wd SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY STUFF FERR# and IGNNE# For legacy purposes, today's x86 processors support the FERR# output signal and the IGNNE# input signal. In general the FERR# signal represents the state of SANDPILE.ORG -- X86 ARCHITECTURE -- DATATYPES 255224: 223192: 191160: 159128: 12796: 9564: 6332: 310: dword: dword: dword: dword: dword: dword: dword: dword SANDPILE.ORG -- X86 ARCHITECTURE -- 3DNOW! OPCODES sandpile.org -- x86 architecture -- 3DNow! opcodes. x86 architecture. 3DNow! opcodes. note: AMD abandoned 3DNow! as well as enhanced 3DNow! with their Family 15h processors, and only supports PREFETCHx now. The PREFETCHx instruction is using the reg field of the mod R/M byte to determine the desired prefetch type (x). 0Fh xxh. SANDPILE.ORG -- X86 ARCHITECTURE -- PROCESSOR MODE processor paging : name: EFER.LMA: CR0.PG: CR4.PAE: CR4.PSE: PDE.PS: page size: table levels: modes: NONE: 0: 0: n/a: n/a: n/a: n/a: n/a: RM, VM, PM: 4K: 1: 0: 0: n/a SANDPILE.ORG -- X86 ARCHITECTURE -- MODEL SPECIFIC REGISTERS MCA Extended State Registers : name: 6 3 : 0 MCG_rAX 0000_0180h rAX MCG_rBX 0000_0181h rBX MCG_rCX 0000_0182h rCX MCG_rDX 0000_0183h rDXMCG_rSI
SANDPILE.ORG -- X86 ARCHITECTURE -- SYSTEM MANAGEMENT MODE traditional Intel P4 processor SMM state save map : offset: contents: size: notes: 7E00h: reserved: 196 bytes: 7EC4h: CR3: dword: copy dumped for unknown purposes: 7EC8h SANDPILE.ORG -- X86 ARCHITECTURE -- CONDITION CODES condition codes : bits: cc: condition(s) 3: 2: 1: 0: 0: 0: 0: 0: O: overflow: 0: 0: 0: 1: NO: no overflow: 0: 0: 1: 0: B (NAE, C) u n s i g n e d: below (not above or SANDPILE.ORG -- X86 ARCHITECTURE -- OPCODE ENCODING lower case letters : 1: 2: 4: 8: 16: 32: 64 : byte: word: dword: qword: oword: yword: zword: x = oword or yword upper = yword or zword normal = oword or yword or zword half = qword or oword or yword fourth = dword or qword or oword: o. eighth = word or dword or qword: o. v = word or dword or qword: z = word or dword or dword: y = dword or qword: p SANDPILE.ORG -- X86 ARCHITECTURE -- CONTROL REGISTERS CR015 : name: 6 3: 6 2: 6 1: 6 0: 5 9: 5 8: 5 7: 5 6: 5 5: 5 4: 5 3: 5 2: 5 1: 5 0: 4 9: 4 8: 4 7: 4 6: 4 5: 4 4: 4 3: 4 2: 4 1: 4 0: 3 9: 3 8: 3 7: 3 6: 3 5: 3 4 SANDPILE.ORG -- X86 ARCHITECTURE -- TASK STATE SEGMENT 32-bit TSS : offset: 3 1: 3 0: 2 9: 2 8: 2 7: 2 6: 2 5: 2 4: 2 3: 2 2: 2 1: 2 0: 1 9: 1 8: 1 7: 1 6: 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0 +00h SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY STUFF FERR# and IGNNE# For legacy purposes, today's x86 processors support the FERR# output signal and the IGNNE# input signal. In general the FERR# signal represents the state of SANDPILE.ORG -- X86 ARCHITECTURE -- DATATYPES 255224: 223192: 191160: 159128: 12796: 9564: 6332: 310: dword: dword: dword: dword: dword: dword: dword: dword SANDPILE.ORG -- X86 ARCHITECTURE -- 3DNOW! OPCODES sandpile.org -- x86 architecture -- 3DNow! opcodes. x86 architecture. 3DNow! opcodes. note: AMD abandoned 3DNow! as well as enhanced 3DNow! with their Family 15h processors, and only supports PREFETCHx now. The PREFETCHx instruction is using the reg field of the mod R/M byte to determine the desired prefetch type (x). 0Fh xxh. SANDPILE.ORG -- X86 ARCHITECTURE -- PROCESSOR MODE processor paging : name: EFER.LMA: CR0.PG: CR4.PAE: CR4.PSE: PDE.PS: page size: table levels: modes: NONE: 0: 0: n/a: n/a: n/a: n/a: n/a: RM, VM, PM: 4K: 1: 0: 0: n/a SANDPILE.ORG -- X86 ARCHITECTURE -- MODEL SPECIFIC REGISTERS MCA Extended State Registers : name: 6 3 : 0 MCG_rAX 0000_0180h rAX MCG_rBX 0000_0181h rBX MCG_rCX 0000_0182h rCX MCG_rDX 0000_0183h rDXMCG_rSI
SANDPILE.ORG -- X86 ARCHITECTURE -- SYSTEM MANAGEMENT MODE traditional Intel P4 processor SMM state save map : offset: contents: size: notes: 7E00h: reserved: 196 bytes: 7EC4h: CR3: dword: copy dumped for unknown purposes: 7EC8h SANDPILE.ORG -- X86 ARCHITECTURE -- CONDITION CODES condition codes : bits: cc: condition(s) 3: 2: 1: 0: 0: 0: 0: 0: O: overflow: 0: 0: 0: 1: NO: no overflow: 0: 0: 1: 0: B (NAE, C) u n s i g n e d: below (not above or SANDPILE.ORG -- X86 ARCHITECTURE -- OPCODE ENCODING lower case letters : 1: 2: 4: 8: 16: 32: 64 : byte: word: dword: qword: oword: yword: zword: x = oword or yword upper = yword or zword normal = oword or yword or zword half = qword or oword or yword fourth = dword or qword or oword: o. eighth = word or dword or qword: o. v = word or dword or qword: z = word or dword or dword: y = dword or qword: p SANDPILE.ORG -- X86 ARCHITECTURE -- CONTROL REGISTERS CR015 : name: 6 3: 6 2: 6 1: 6 0: 5 9: 5 8: 5 7: 5 6: 5 5: 5 4: 5 3: 5 2: 5 1: 5 0: 4 9: 4 8: 4 7: 4 6: 4 5: 4 4: 4 3: 4 2: 4 1: 4 0: 3 9: 3 8: 3 7: 3 6: 3 5: 3 4 SANDPILE.ORG -- X86 ARCHITECTURE -- TASK STATE SEGMENT 32-bit TSS : offset: 3 1: 3 0: 2 9: 2 8: 2 7: 2 6: 2 5: 2 4: 2 3: 2 2: 2 1: 2 0: 1 9: 1 8: 1 7: 1 6: 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0 +00h SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY STUFF FERR# and IGNNE# For legacy purposes, today's x86 processors support the FERR# output signal and the IGNNE# input signal. In general the FERR# signal represents the state of SANDPILE.ORG -- X86 ARCHITECTURE -- DATATYPES 255224: 223192: 191160: 159128: 12796: 9564: 6332: 310: dword: dword: dword: dword: dword: dword: dword: dword SANDPILE.ORG -- X86 ARCHITECTURE -- REFERENCE DOCUMENTS PDF. SDM vol 2C (V-Z) 326018-074. 04/21. PDF. older. PDF. SDM vol 2D(SMX) 334569-074.
SANDPILE.ORG -- X86 ARCHITECTURE -- GENERAL PURPOSE REGISTERS traditional general purpose registers : 6 3 : 3 2: 3 1 : 1 6: 1 5 : 8: 7 : 0: RAX or R0: zero-extended: EAX or R0D: preserved: preserved: AX or R0W: AH: AL or R0B SANDPILE.ORG -- X86 ARCHITECTURE -- PROCESSOR MODE processor paging : name: EFER.LMA: CR0.PG: CR4.PAE: CR4.PSE: PDE.PS: page size: table levels: modes: NONE: 0: 0: n/a: n/a: n/a: n/a: n/a: RM, VM, PM: 4K: 1: 0: 0: n/a SANDPILE.ORG -- X86 ARCHITECTURE -- TASK STATE SEGMENT 32-bit TSS : offset: 3 1: 3 0: 2 9: 2 8: 2 7: 2 6: 2 5: 2 4: 2 3: 2 2: 2 1: 2 0: 1 9: 1 8: 1 7: 1 6: 1 5: 1 4: 1 3: 1 2: 1 1: 1 0: 9: 8: 7: 6: 5: 4: 3: 2: 1: 0 +00h SANDPILE.ORG -- X86 ARCHITECTURE -- CONTROL REGISTERS CR015 : name: 6 3: 6 2: 6 1: 6 0: 5 9: 5 8: 5 7: 5 6: 5 5: 5 4: 5 3: 5 2: 5 1: 5 0: 4 9: 4 8: 4 7: 4 6: 4 5: 4 4: 4 3: 4 2: 4 1: 4 0: 3 9: 3 8: 3 7: 3 6: 3 5: 3 4 SANDPILE.ORG -- X86 ARCHITECTURE -- CPUID Before trying to rely upon CPUID, a program must properly detect and sometimes enable the instruction. In particular, the program must detect the presence of SANDPILE.ORG -- X86 ARCHITECTURE -- LEGACY FLOATING-POINT FP/MMX/3DNow! registers : 7 9: 7 8 : 6 4: 6 3 0 : S i g n B i t s: ST(0) Exponent: ST(0) Significand or MM0: ST(1) Exponent: ST(1) Significand or MM1: ST(2) Exponent: ST(2) Significand or MM2 SANDPILE.ORG -- X86 ARCHITECTURE -- 3 BYTE OPCODES pre-fix & OC0: 0Fh 24h xxh x0h : x1h: x2h: x3h: x4h: x5h: x6h: x7h: n/a OC0 =0: 0xh: FMADDPS VDo,VDo,Vo,Wo (SSE5A) FMADDPD VDo,VDo,Vo,Wo (SSE5A) FMADDSS VDd,VDd,Vd,Wd ------------------------- THE WORLD'S LEADING SOURCE FOR TECHNICAL X86 PROCESSOR INFORMATION. ------------------------- -------------------------REGS
------------------------- general purpose registers rFLAGS | masks | bounds| CET
segment registers
table registers
control registers
debug registers
legacy FP | vector FP model specific registers -------------------------CODE
-------------------------opcode encoding
1 byte opcodes
2 byte opcodes
3 byte opcodes
opcode groups | bits FP | 3DNow! | SSE5A| XOP
mod R/M byte and SIB byte16-bit mod R/M byte
-------------------------DATA
-------------------------datatypes
stack frame
selectors
descriptors
descriptor tables
task state segment
paging structures
system management mode -------------------------MISC
-------------------------condition codes
exceptions | interrupts legacy stuff | APIC | VXcoherency
processor mode
initial state
canonical addresses
CPUID
------------------------- restrict search to www.sandpile.org -------------------------------------------------- 1996-2020 by Christian Ludloff. All rights reserved. Use at your
own risk.
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