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MS-DOS Interrupt List
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1999-01-03
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SYSTEM-MANAGEMENT MODE Release 60 Last change 03jan99
Copyright (c) 1997,1998,1999 Ralf Brown
---------------------------------------------
SMM Am486
Format of Am486 SMM State-Save Map:
Offset Size Description (Table S0001)
FE00h reserved
FEE4h DWORD DR3
FEE8h DWORD DR2
FEECh DWORD DR1
FEF0h DWORD DR0
FEF4h DWORD CR2
FEF8h DWORD SMM state dump base address
fEFCh DWORD SMM revision ID (see #S0004)
FF00h WORD I/O restart
(set to 00FFh to re-execute trapped I/O)
FF02h WORD halt auto restart
(bit 0 set on entry if SMI during HLT)
(set to 00FFh to restart from HLT)
FF04h DWORD I/O trap word (see #S0002)
FF08h DWORD reserved
FF0Ch DWORD reserved
FF10h DWORD previous EIP
FF14h 5 DWORDs ???
FF28h DWORD reserved
FF2Ch DWORD reserved
FF30h DWORD ES limit
FF34h DWORD ES base
FF38h DWORD ES attributes
FF3Ch DWORD CS limit
FF40h DWORD CS base
FF44h DWORD CS attributes
FF48h DWORD SS limit
FF4Ch DWORD SS base
FF50h DWORD SS attributes
FF54h DWORD DS limit
FF58h DWORD DS base
FF5Ch DWORD DS attributes
FF60h DWORD FS limit
FF64h DWORD FS base
FF68h DWORD FS attributes
FF6Ch DWORD GS limit
FF70h DWORD GS base
FF74h DWORD GS attributes
FF78h DWORD LDT limit
FF7Ch DWORD LDT base
FF80h DWORD LDT attribute
FF84h DWORD GDT limit
FF88h DWORD GDT base
FF8Ch DWORD GDT attribute
FF90h DWORD IDT limit
FF94h DWORD IDT base
FF98h DWORD IDT attribute
FF9Ch DWORD TSS limit
FFA0h DWORD TSS base
FFA4h DWORD TSS attribute
FFA8h WORD ES
FFAAh WORD unused???
FFACh WORD CS
FFAEh WORD unused???
FFB0h WORD SS
FFB2h WORD unused???
FFB4h WORD DS
FFB6h WORD unused???
FFB8h WORD FS
FFBAh WORD unused???
FFBCh WORD GS
FFBEh WORD unused???
FFC0h DWORD LDTR
FFC4h DWORD TR
FFC8h DWORD DR7
FFCCh DWORD DR6
FFD0h DWORD EAX
FFD4h DWORD ECX
FFD8h DWORD EDX
FFDCh DWORD EBX
FFE0h DWORD ESP
FFE4h DWORD EBP
FFE8h DWORD ESI
FFECh DWORD EDI
FFF0h DWORD EIP
FFF4h DWORD EFLAGS
FFF8h DWORD CR3
FFFCh DWORD CR0
SeeAlso: #S0003
Bitfields for AMD Am486 I/O trap word:
Bit(s) Description (Table S0002)
31-16 I/O address
15-2 reserved
1 valid I/O instruction
0 direction
SeeAlso: #S0001
---------------------------------------------
SMM AMD-K5
Format of AMD K5 SMM State-Save Area:
Offset Size Description (Table S0003)
FE00h reserved
FEF8h DWORD SMM base address
(may be set to any multiple of 32K; initially 00030000h)
FEFCh DWORD SMM revision identifier (see #S0004)
FF00h WORD I/O trap restart slot (see #S0007)
FF02h WORD HLT restart slot (see #S0005)
FF04h DWORD I/O restart EDI
FF08h DWORD I/O restart ECX
FF0Ch DWORD I/O restart ESI
FF10h DWORD CR4
FF14h DWORD CR2
FF18h 3 DWORDs reserved
FF24h DWORD ES limit
FF28h DWORD ES base
FF2Ch DWORD ES attributes
FF30h DWORD CS limit
FF34h DWORD CS base
FF38h DWORD CS attributes
FF3Ch DWORD SS limit
FF40h DWORD SS base
FF44h DWORD SS attributes
FF48h DWORD DS limit
FF4Ch DWORD DS base
FF50h DWORD DS attributes
FF54h DWORD FS limit
FF58h DWORD FS base
FF5Ch DWORD FS attributes
FF60h DWORD GS limit
FF64h DWORD GS base
FF68h DWORD GS attributes
FF6Ch DWORD LDT limit
FF70h DWORD LDT base
FF74h DWORD LDT attributes
FF78h DWORD TSS limit
FF7Ch DWORD TSS base
FF80h DWORD TSS attributes
FF84h DWORD GDT limit
FF88h DWORD GDT base
FF8Ch DWORD IDT limit
FF90h DWORD IDT base
FF94h 2 DWORDs reserved
FF9Ch DWORD I/O trap EIP
FFA0h DWORD reserved
FFA4h DWORD I/O trap DWORD (see #S0006)
FFA8h WORD ES
FFAAh WORD unused???
FFACh WORD CS
FFAEh WORD unused???
FFB0h WORD SS
FFB2h WORD unused???
FFB4h WORD DS
FFB6h WORD unused???
FFB8h WORD FS
FFBAh WORD unused???
FFBCh WORD GS
FFBEh WORD unused???
FFC0h DWORD LDTR
FFC4h DWORD TR
FFC8h DWORD DR7
FFCCh DWORD DR6
FFD0h DWORD EAX
FFD4h DWORD ECX
FFD8h DWORD EDX
FFDCh DWORD EBX
FFE0h DWORD ESP
FFE4h DWORD EBP
FFE8h DWORD ESI
FFECh DWORD EDI
FFF0h DWORD EIP
FFF4h DWORD EFLAGS
FFF8h DWORD CR3
FFFCh DWORD CR0
SeeAlso: #S0001
Bitfields for AMD K5 SMM Revision Identifier:
Bit(s) Description (Table S0004)
31-18 reserved (0)
17 SMM base address relocation available (always 1 [enabled] on K5)
16 I/O trap restart supported (always 1 on K5)
15-0 SMM revision level (currently 0000h)
SeeAlso: #S0003
Bitfields for AMD K5 Halt Restart Slot:
Bit(s) Description (Table S0005)
15-1 undefined
0 (on SMM entry) entered SMM from Halt state
(at RSM) return to Halt state instead of state in SMM state-save area
SeeAlso: #S0003
Bitfields for AMD K5 I/O Trap DWORD:
Bit(s) Description (Table S0006)
31-16 I/O port address
15 I/O was string operation (INS,OUTS,etc.)
14-2 reserved
1 valid I/O instruction
0 direction (0 = output, 1 = input)
SeeAlso: #S0003,#S0007
Bitfields for AMD K5 I/O Trap Restart Slot:
Bit(s) Description (Table S0007)
31-16 reserved
15-0 I/O instruction restart on RSM
0000h resume at next instruction following trapped I/O instruction
(default on SMM entry)
00FFh re-execute the trapped I/O instruction
Note: before changing the restart value, check that the I/O instruction is
actually valid (see #S0006)
SeeAlso: #S0003,#S0006
---------------------------------------------
SMM Pentium
Format of Pentium State Dump record:
Offset Size Description (Table S0008)
FE00h 248 BYTEs officially reserved, actually unused
FEF8h DWORD state dump base address (must be multiple of 32K)
FEFCh DWORD SMM revision identifier
bits 15-0: SMM revision level
bit 16: I/O trap extension is present (offset FF00h)
bit 17: SMM base relocation supported (offset FEF8h)
bits 31-18: reserved
FF00h WORD I/O Trap restart
(set to 00FFh to re-execute trapped I/O)
FF02h WORD Halt auto-restart
(bit 0 set on entry if SMI during HLT; if handler clears it,
the CPU returns to the instruction after the interrupted HLT
rather than to the HLT instruction)
FF04h DWORD (undoc) I/O restart EDI / CR0
FF08h DWORD (undoc) I/O restart ECX
FF0Ch DWORD (undoc) I/O restart ESI
FF10h DWORD (undoc) I/O restart EIP
FF14h 16 BYTEs unused
FF24h WORD (undoc) alternate DR6
FF26h WORD (undoc) RSM control
if bit 0 set on return, the low word of DR6 is loaded from FF26h
instead of FFCCh
FF28h DWORD (undoc) CR4
FF2Ch DWORD unused
FF30h 12 BYTEs (undoc) ES descriptor cache
DWORD limit
DWORD base address
DWORD type
FF3Ch 12 BYTEs (undoc) CS descriptor cache
FF48h 12 BYTEs (undoc) SS descriptor cache
FF54h 12 BYTEs (undoc) DS descriptor cache
FF60h 12 BYTEs (undoc) FS descriptor cache
FF6Ch 12 BYTEs (undoc) GS descriptor cache
FF78h 12 BYTEs (undoc) LDT descriptor cache
FF84h 12 BYTEs (undoc) GDT descriptor cache
FF90h 12 BYTEs (undoc) IDT descriptor cache
FF9Ch 12 BYTEs (undoc) TSS descriptor cache
FFA8h WORD ES
FFAAh WORD reserved
FFACh WORD CS
FFAEh WORD reserved
FFB0h WORD SS
FFB2h WORD reserved
FFB4h WORD DS
FFB6h WORD reserved
FFB8h WORD FS
FFBAh WORD reserved
FFBCh WORD GS
FFBEh WORD reserved
FFC0h DWORD LDTR
FFC4h DWORD TR
FFC8h DWORD DR7
FFCCh DWORD DR6
FFD0h DWORD EAX
FFD4h DWORD ECX
FFD8h DWORD EDX
FFDCh DWORD EBX
FFE0h DWORD ESP
FFE4h DWORD EBP
FFE8h DWORD ESI
FFECh DWORD EDI
FFF0h DWORD EIP
FFF4h DWORD EFLAGS
FFF8h DWORD CR3
FFFCh DWORD CR0
SeeAlso: #S0003
--------!---Admin----------------------------
Highest Table Number = S0008
--------!---FILELIST-------------------------
Please redistribute all of the files comprising the interrupt list (listed at
the beginning of the list and in INTERRUP.1ST) unmodified as a group, in a
quartet of archives named INTER60A through INTER60D (preferably the original
authenticated PKZIP archives), and the utility and hypertext conversion
programs in three additional archives called INTER60E.ZIP to INTER60G.ZIP.
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------!---CONTACT_INFO---------------------
Internet: ralf@pobox.com (currently forwards to ralf@telerama.lm.com)
FIDO: Ralf Brown 1:129/26.1