Hot Shareware 32/hot34.iso/ficheros/DTOOL/INTER57C.ZIP/MSR.LST

File List | 1998-03-22 | 56KB | 1,467 lines

MODEL-SPECIFIC REGISTERS    Release 57        Last change 22mar98
Copyright (c) 1996,1997,1998 Ralf Brown

--------!---Note-----------------------------
Note:    except where mentioned otherwise, Pentium information also applies to
      the PentiumMMX, and Pentium Pro information also applies to the
      Pentium II
----------S00000000--------------------------
MSR 00000000h - Pentium, Pentium Pro - MACHINE CHECK EXCEPTION ADDRESS
Size:    32-36 bits
Access:    Read
Desc:    on any Machine Check exception (INT 12), this MSR contains the physical
      address at which the exception occurred
Note:    also supported by AMD Am5k86, K5, and K6; however, the K6 does not
      actually support the machine check -- this register may be written
      on the K6 to emulate that functionality
SeeAlso: MSR 00000001h,MSR 80000000h,INT 12"MACHINE CHECK"
----------S00000001--------------------------
MSR 00000001h - Pentium, Pentium Pro - MACHINE CHECK EXCEPTION TYPE
Size:    6 bits
Access:    Read
Desc:    when a Machine Check exception occurs, this register contains the
      reason for the exception
Note:    also supported by AMD Am5k86, K5, and K6; however, the K6 does not
      actually support the machine check -- this register may be written
      on the K6 to emulate that functionality
SeeAlso: MSR 00000000h,MSR 80000001h,INT 12"MACHINE CHECK"

Bitfields for Machine Check Exception type (MSR 00000001h):
Bit(s)    Description    (Table R001)
 63-6    reserved (0)
 5    "FERI" Fan Error Indicator (Pentium OverDrive only) -- CPU overheated
    (once set, this bit remains set even through CPU reset)
 4    bus cycle causing exception was locked
 3    state of M/IO# pin during bus cycle
 2    state of D/C# pin during bus cycle
 1    state of W/R# pin during bus cycle
 0    Machine Check pending (cleared by reading this MSR)
----------S00000002--------------------------
MSR 00000002h - Pentium - (TR1) PARITY REVERSAL TEST REGISTER
Size:    14 bits
Access:    Write
SeeAlso: MSR 00000004h,MSR 80000002h

Bitfields for Parity Reversal Test Register (TR1):
Bit(s)    Description    (Table R002)
 63-14    reserved (0)
 13    microcode
 12    Data TLB data
 11    Data TLB tag
 10    Data Cache data
 9    Data Cache tag
 8    Code TLB data
 7    Code TLB tag
 6    "ID3" data cache odd bits 129-255
 5    "ID2" data cache even bits 128-254
 4    "ID1" data cache odd bits 1-127
 3    "ID0" data cache even bits 0-126
 2    instruction cache tag
 1    do not go into SHUTDOWN mode on parity error
 0    (read/write-clear) "Parity Error Summary" set on any parity error
Note:    bits 2-13 indicate that the parity should be reversed for the given
      subsystem, thus always forcing a parity error
----------S00000003--------------------------
MSR 00000003h - Pentium - INVALID
Note:    attempted accesses to this MSR cause an exception
SeeAlso: MSR 80000003h,MSR 0000000Fh
----------S00000004--------------------------
MSR 00000004h - Pentium - (TR2) INSTRUCTION CACHE END BITS
Size:    4 bits
Access:    Read/Write
Note:    documented as reserved on Pentium MMX
SeeAlso: MSR 00000002h,MSR 00000005h,MSR 80000004h

Bitfields for Instruction Cache End Bits (TR2):
Bit(s)    Description    (Table R003)
 63-4    reserved (0)
 3-0    end bits (each set bit indicates the last byte of an instruction in
      TR3 during code cache access)
Note:    when a new line is written into the code cache, all end bits are set;
      the instruction decoder then clears those bits corresponding to
      bytes which are not the last byte of an instruction
SeeAlso: #R004
----------S00000005--------------------------
MSR 00000005h - Pentium - (TR3) CACHE DATA TEST REGISTER
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 00000004h,MSR 00000006h,MSR 80000005h

Bitfields for Cache Data Test Register (TR3):
Bit(s)    Description    (Table R004)
 63-32    reserved (0)
 31-0    data read/written from/to cache (code or data)
SeeAlso: #R005
----------S00000006--------------------------
MSR 00000006h - Pentium - (TR4) CACHE TAG
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 00000005h,MSR 00000007h,MSR 80000006h

Bitfields for Cache Tag Test Register (TR4):
Bit(s)    Description    (Table R005)
 63-32    reserved (0)
 31-8    cache tag (bits 35-12 of address)
 7-3    reserved (0)
 2    LRU (P54C)
    =0  Way 0
    =1  Way 1
 4-2    LRU (P55C [PentiumMMX])
    =X00  Way 0
    =X10  Way 1
    =0X1  Way 2
    =1X1  Way 3
 1-0    Valid
    ---code cache (selected by TR5)---
    x0 cache line invalid
    x1 cache line valid
    ---data cache (selected by TR5)---
    00 cache line invalid
    01 cache line shared
    10 cache line exclusive
    11 cache line modified
SeeAlso: #R004,#R006
----------S00000007--------------------------
MSR 00000007h - Pentium - (TR5) CACHE CONTROL
Size:    15 bits
Access:    Write
SeeAlso: MSR 00000006h,MSR 00000008h,MSR 80000007h

Bitfields for Cache Control Test Register (TR5):
Bit(s)    Description    (Table R006)
 63-20    reserved (0)
 19    entry[1] (PentiumMMX only)
    combined with bit 12, selects Way within cache set
 18-15    reserved (0)
 14    cache write-back mode (instead of write-through) enabled
 13    select data cache instead of code cache
 12    select Way within cache set
 11-5    cache set number
 4-2    buffer select (specify which 32-bit portion of cache line to access)
 1-0    control
    00 normal operation
    01 test write
    10 test read
    11 flush (action controlled by TR7)
        TR7.CD/TR7.WD    Action
         0    x    invalidate code cache line
         1    0    invalidate data cache line, but don't writeback
         1    1    invalidate data cache line, writeback if dirty
SeeAlso: #R004,#R005
----------S00000008--------------------------
MSR 00000008h - Pentium - (TR6) TLB COMMAND
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 00000007h,MSR 00000009h,MSR 80000008h

Bitfields for Pentium TLB Command Test Register:
Bit(s)    Description    (Table R007)
 63-32    reserved (0)
 31-12    linear address
 11    TLB entry is valid
 10    page is dirty (has been written to)
 9    page may only be accessed from Ring 0
 8    page may be written
 7-3    reserved (0)
 2    page is 4M instead of 4K
 1    data TLB instead of code TLB
 0    operation (0=write, 1=read)
SeeAlso: #R008
----------S00000009--------------------------
MSR 00000009h - Pentium - (TR7) TLB DATA
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 00000008h,MSR 0000000Bh,MSR 80000009h

Bitfields for Pentium TLB Data Test Register (TR7):
Bit(s)    Description    (Table R008)
 63-32    reserved (0)
 31-12    physical address
 11    "CD" Page Cache Disable
 10    "WB" Page Write-Through
 9-7    TLB Least-Recently Used value (non-MMX Pentium only)
 6-5    reserved (0) (P54C)
 6-5    bits 5-4 of TLB entry number (PentiumMMX only)
 4    Hit Indicator
 3-0    bits 3-0 of TLB entry number (PentiumMMX only)
 3-2    TLB entry number (non-MMX Pentium)
 1-0    reserved (0) (non-MMX Pentium)
Note:    if a write with bit 4 (Hit Indicator) set is followed by a read, the
      value returned in bit 4 indicates whether the selected address was
      found in the TLB; if found, bits 3-2 indicate which entry contained
      the hit
SeeAlso: #R007,#R009
----------S0000000A--------------------------
MSR 0000000Ah O - Pentium A-step - (TR8) 36-BIT TLB DATA TEST REGISTER
Size:    4 bits
Note:    attempted accesses to this MSR cause an exception on any Pentium except
      A-step chips, since the 36-bit physical addressing feature was
      removed from the Pentium prior to general release
SeeAlso: MSR 8000000Ah

Bitfields for Pentium A-step 36-bit addressing Test Register (TR8):
Bit(s)    Description    (Table R009)
 63-4    reserved (0)
 3-0    high bits of physical address (A35-A32)
SeeAlso: #R008
----------S0000000B--------------------------
MSR 0000000Bh - Pentium - (TR9) BRANCH TARGET BUFFER TAG
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 00000009h,MSR 0000000Ch,MSR 8000000Bh

Bitfields for non-MMX Pentium Branch Target Buffer Tag (TR9):
Bit(s)    Description    (Table R010)
 63-32    reserved (0)
 31-6    tag address (bits 31-6 of last byte of branch)
 5-2    reserved (0)
 1-0    history (state of current branch)
SeeAlso: #R012,#R013,#R011

Bitfields for PentiumMMX Branch Target Buffer Tag (TR9):
Bit(s)    Description    (Table R011)
 63-32    reserved
 31-8    tag address (bits 31-8 of last byte of branch)
 7-6    offset (bits 1-0 of last byte of branch)
 5    valid BTB entry
 4    branch is predicted as taken
 3-0    history (state of current branch)
SeeAlso: #R010
----------S0000000C--------------------------
MSR 0000000Ch - Pentium - (TR10) BRANCH TARGET BUFFER TARGET
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 0000000Bh,MSR 0000000Dh,MSR 8000000Ch

Bitfields for Pentium Branch Target Buffer Target (TR10):
Bit(s)    Description    (Table R012)
 63-32    reserved (0)
 31-0    target address
SeeAlso: #R010,#R013
----------S0000000D--------------------------
MSR 0000000Dh - Pentium - (TR11) BRANCH TARGET BUFFER CONTROL
Size:    12 bits
Access:    Write
SeeAlso: MSR 0000000Ch,MSR 0000000Eh,MSR 8000000Dh

Bitfields for Pentium Branch Target Buffer Control (TR11):
Bit(s)    Description    (Table R013)
 63-26    reserved (0)
 25-24    branch type (PentiumMMX only)
    00 conditional branch
    01 unconditional jump
    10 call
    11 return
 23-13    reserved (0)
 12    bit 2 of test command (PentiumMMX only)
 11-8    BTB set number to access (non-MMX)
 11-8    BTB set number to access (PentiumMMX only)
 7-6    BTB bank (PentiumMMX only)
 5-4    reserved (0)
 3-2    BTB entry (way) within set
 1-0    test command
    00 normal operation
    01 test write
    10 test read
    11 flush
    101 test read tag (PentiumMMX only)
SeeAlso: #R010,#R012
----------S0000000E--------------------------
MSR 0000000Eh - Pentium, K6 - (TR12) NEW FEATURE CONTROL
Size:    10 bits
Access:    Write
SeeAlso: MSR 0000000Dh,MSR 8000000Eh

Bitfields for Pentium New Feature Control (TR12):
Bit(s)    Description    (Table R014)
 63-21    reserved (0)
 20    (PentiumMMX only) Data Cache Inhibit (disable internal data cache)
 19    (PentiumMMX only) Code Cache Inhibit (disable internal code cache)
 18-10    reserved (0)
 9    enable I/O instruction restart for SMM and use different interrupt
      priority
 8    generate fast branch-trace message bus cycles
 7    ??? (documented as reserved) (0)
 6    disable auto-halt feature (P54C only)
 5    ??? (documented as reserved) (0)
 4    disable internal APIC (non-MMX Pentium only)
 3    Cache Inhibit (disable internal L1 cache)
 2    Single-Pipe Execution (disable V pipeline)
 1    enable special branch trace message cycle on BTB hit (default = 0)
 0    disable branch prediction (no BTB)
Note:    the AMD K6 only supports bit 3 (cache inhibit) of this register;
      all other bits should be set to zero
----------S0000000F--------------------------
MSR 0000000Fh - Pentium - INVALID
Note:    attempted accesses to this MSR cause an exception
SeeAlso: MSR 8000000Fh,MSR 00000003h
----------S00000010--------------------------
MSR 00000010h - Pentium, Pentium Pro - TIME STAMP COUNTER REGISTER
Size:    64 bits
Access:    Read/Write
Desc:    starting at 00000000h:00000000h on reset, this counter increments on
      every CPU-core clock cycle
Notes:    on a Pentium Pro, only the low 32 bits may be written; on writes, the
      high 32 bits are cleared to 00000000h
    also supported by AMD Am5k86,K5,K6 and Cyrix 6x86MX
SeeAlso: MSR 80000010h
----------S00000011--------------------------
MSR 00000011h - Pentium, Cyrix 6x86MX - EVENT COUNTER SELECTION AND CONTROL
Size:    26 bits
Access:    Read/Write
SeeAlso: MSR 00000012h,MSR 00000013h,MSR 00000186h,MSR 80000011h

Bitfields for Pentium Event Counter Control:
Bit(s)    Description    (Table R015)
 63-27    reserved (0)
 26    (Cyrix 6x86MX only) "ES1" bit 6 of event type for counter 1
 25    external pin PM1 shows counter overflows instead of counter increments
 24    counter 1 counts clock cycles instead of events
 23    enable counter 1 counting in CPL3
 22    enable counter 1 counting in CPL2-0
 21-16    event type for counter 1 (see #R016)
 15-11    reserved
 10    (Cyrix 6x86MX only) "ES0" bit 6 of event type for counter 0
 9    external pin PM0 shows counter overflows instead of counter increments
 8    counter 0 counts clock cycles instead of events
 7    enable counter 0 counting in CPL3
 6    enable counter 0 counting in CPL2-0
 5-0    event type for counter 0 (see #R016)

(Table R016)
Values for Pentium/6x86MX Event Counter event type:
 00h    data read
 01h    data write
 02h    data TLB miss
 03h    data read miss
 04h    data write miss
 05h    write hit to Modified/Exclusive cache line
 06h    data cache lines written back
 07h    external data cache snoops
 08h    external data cache snoop hits
 09h    simultaneous memory accesses in both pipes
 0Ah    data bank access conflict between U and V pipes
 0Bh    misaligned data memory or I/O references
 0Ch    code read
 0Dh    code TLB miss
 0Eh    code cache miss
 0Fh    any segment register load
 10h    (Pentium only) segment descriptor cache accessed
 11h    (Pentium only) segment descriptor cache hit
 12h    any branch
 13h    BTB hit
 14h    taken branch / BTB hit
 15h    pipeline flushes
 16h    total instructions executed
 17h    instruction executed in V pipe
 18h    bus utilization
 19h    pipeline stalled by write backups
 1Ah    pipeline stalled by data memory read
 1Bh    pipeline stalled by write to Modified/Exclusive cache line
 1Ch    locked bus cycle
 1Dh    I/O cycle
 1Eh    non-cacheable memory references
 1Fh    pipeline stalled by Address Generation Interlock
 20h    reserved
 21h    reserved
 22h    floating-point operations
 23h    Breakpoint 0 match
 24h    Breakpoint 1 match
 25h    Breakpoint 2 match
 26h    Breakpoint 3 match
 27h    hardware interrupt
 28h    data read or data write
 29h    data read/write miss
---Pentium---
 2Ah-3Fh reserved
---PentiumMMX---
 2Ah    bus ownership latency (counter 0, duration) or
    bus ownership transfers (counter 1)
 2Bh    MMX instructions executed in U pipe (counter 0) or V pipe (counter 1)
 2Ch    cache M-state line sharing (counter 0) or
    cache line sharing (counter 1)
 2Dh    EMMS instructions executed (counter 0) or
    transitions between MMX/FP (counter 1)
 2Eh    bus use due to processor activity (counter 0, duration) or
    writes to non-cacheable memory (counter 1)
 2Fh    saturating MMX instructions executed (counter 0) or
    saturations performed (counter 1)
 30h    number of cycles not in HLT state (counter 0) or
    number of cycles in HLT state (counter 1)
 31h    MMX instruction data reads (counter 0) or
    MMX instruction data read misses
 32h    floating-point stalls (counter 0) or taken branches (counter 1)
 33h    D1 starvation and FIFO is empty (counter 0) or
    D1 starvation and only one instruction in FIFO (counter 1)
 34h    MMX instruction data writes (counter 0) or
    MMX instruction data write misses (counter 1)
 35h    pipeline flushes due to wrong branch prediction (counter 0) or
    pl. flushes due to wrong branch pred. resolved in WB stage (counter 1)
 36h    misaligned data memory reference on MMX instruction (counter 0) or
    pipeline stalled waiting for MMX instruction data mem read (counter 1)
 37h    returns, predicted incorrectly or not at all (counter 0) or
    total returns predicted (counter 1)
 38h    clocks MMX instruction multiply unit interlock (counter 0) or
    clocks MOVD/MOVQ store stall (counter 1)
 39h    returns (counter 0 only)
 3Ah    BTB false entries (counter 0) or
    BTB prediction miss on not-taken branch (counter 1)
 3Bh    clocks MMX instruction stalled due to full write buffers (counter 0) or
    clocks stalled on MMX instruction write to E or M line (counter 1)
---6x86MX---
 2Ah    reserved
 2Bh    MMX instructions executed in X pipe (counter 0) or Y pipe (counter 1)
 2Ch    reserved
 2Dh    EMMS instructions executed (counter 0) or
    transitions between MMX/FP (counter 1)
 2Eh    reserved
 2Fh    saturating MMX instructions executed (counter 0) or
    saturations performed (counter 1)
 30h    reserved
 31h    MMX instruction data reads (counter 0 only)
 32h    taken branches (counter 1 only)
 33h-36h reserved
 37h    returns, predicted incorrectly or not at all (counter 0) or
    total returns predicted (counter 1)
 38h    clocks MMX instruction multiply unit interlock (counter 0) or
    clocks MOVD/MOVQ store stall (counter 1)
 39h    returns (counter 0) or return stack buffer overflows (counter 1)
 3Ah    BTB false entries (counter 0) or
    BTB prediction miss on not-taken branch (counter 1)
 3Bh    clocks MMX instruction stalled due to full write buffers (counter 0) or
    clocks stalled on MMX instruction write to E or M line (counter 1)
 3Ch-3Fh reserved
 40h    L2 TLB misses (code or data)
 41h    L2 TLB data miss
 42h    L2 TLB code miss
 43h    L1 TLB miss (code or data)
 44h    TLB flushes
 45h    TLB page invalidations
 46h    TLB page invalidations which hit
 47h    reserved
 48h    instructions decoded
 49h-7Fh reserved
SeeAlso: #R015
----------S00000012--------------------------
MSR 00000012h - Pentium, Cyrix 6x86MX - EVENT COUNTER #0
Size:    40 bits
Access:    Read/Write
SeeAlso: MSR 00000011h,MSR 00000013h,MSR 80000012h,MSR 000000C1h
----------S00000013--------------------------
MSR 00000013h - Pentium, Cyrix 6x86MX - EVENT COUNTER #1
Size:    40 bits
Access:    Read/Write
SeeAlso: MSR 00000011h,MSR 00000012h,MSR 80000013h,MSR 000000C2h
----------S00000014--------------------------
MSR 00000014h - Pentium P54C - bug?
Note:    returns 0 on all reads and ignores any writes for P54C processors with
      CPUID values <= 0524h, rather than causing an exception; possibly due
      to a microcode bug
----------S0000001B--------------------------
MSR 0000001Bh - Pentium Pro - APIC BASE ADDRESS
SeeAlso: MEM FEE00000h

Bitfields for Pentium Pro MSR 0000001Bh:
Bit(s)    Description    (Table R017)
 63-12    reserved
 11    APIC global enable (can not be cleared except through hard reset)
 10-9    reserved
 8    BootStrap Processor
 7-0    ???
----------S0000002A--------------------------
MSR 0000002Ah - Pentium Pro - "EBL_CR_POWERON"
Size:    32 bits
Access:    Read/write

Bitfields for Pentium Pro MSR 0000002Ah:
Bit(s)    Description    (Table R018)
 31-27    reserved
 26    (read-only) Low Power enable
 25    reserved
 24-22    (read-only) clock frequency ratio
 21-20    (read-only) symmetric arbitration ID
 19-18    ???
 17-16    (read-only) APIC cluster ID
 15    (read-only) FRC mode enabled
 14    (read-only) Power-on Reset Vector at 1M instead of 4G
 13    (read-only) IN Order Queue depth is 1 instead of 8
 12    (read-only) BINIT# observation enabled
 11    ???
 10    (read-only) AERR# observation enabled
 9    Execute-BIST enabled
 8    output tri-state enabled
 7    disable BINIT# drive
 6    disable BERR# for initiator internal errors
 5    ???
 4    disable BERR# for initiator bus requests
 3    disable AERR# drive
 2    disable response error checking
 1    disable data error checking
 0    data bus uses ECC instead of parity
----------S00000032--------------------------
MSR 00000032h - Pentium Pro - ???
----------S00000033--------------------------
MSR 00000033h - Pentium Pro - ???

Bitfields for Pentium Pro MSR 0033h:
Bit(s)    Description    (Table R019)
 31    (step sB1 and later) disable LOCK# for locked transactions which
      are split across a cache line boundary
 30    (step sB1 and later) disable Instruction Streaming buffers
    --used to work around sB1 errata 58 and 59
 29-0    ???
----------S00000034--------------------------
MSR 00000034h - Pentium Pro - ???
----------S0000003A--------------------------
MSR 0000003Ah - Pentium Pro - ???
----------S00000050--------------------------
MSR 00000050h - Pentium Pro - ???
----------S00000051--------------------------
MSR 00000051h - Pentium Pro - ???
----------S00000052--------------------------
MSR 00000052h - Pentium Pro - ???
----------S00000053--------------------------
MSR 00000053h - Pentium Pro - ???
----------S00000054--------------------------
MSR 00000054h - Pentium Pro - ???
----------S00000079--------------------------
MSR 00000079h - Pentium Pro - BIOS UPDATE TRIGGER
Size:    32 bits
Access:    Write
Desc:    writing the linear address of a microcode update block (see #0457)
      to this MSR cause the CPU to initiate a microcode load
SeeAlso: INT 15/AX=D042h/BL=01h,MSR 0000008Bh
----------S00000082--------------------------
MSR 00000082h - AMD Am5k86 (AMD-K5) - ARRAY ACCESS REGISTER
Size:    64 bits
Note:    EDX remains unchanged after an RDMSR to simplify multiple accesses
SeeAlso: MSR 00000083h

Bitfields for AMD Am5k86 (AMD-K5) Array Access Register:
Bit(s)    Description    (Table R020)
 63-40    pointer within array specified below
 39-32    array identifier (see #R021)
 31-0    array data
SeeAlso: #R033

(Table R021)
Values for AMD Am5k86 Array Pointer:
 E0h    data cache (data)
 E1h    data cache (linear tag) (see #R022)
 E4h    code cache (instruction) (see #R023)
 E5h    code cache (linear tag) (see #R024)
 E6h    code cache (valid bits) (see #R025)
 E7h    code cache (branch-prediction bits) (see #R026)
 E8h    4K TLB (page) (see #R027)
 E9h    4K TLB (linear tag) (see #R028)
 EAh    4M TLB (page) (see #R029)
 EBh    4M TLB (linear tag) (see #R030)
 ECh    data cache (physical tag) (see #R031)
 EDh    code cache (physical tag) (see #R032)
SeeAlso: #R020

Bitfields for AMD AmK586 data cache linear tag:
Bit(s)    Description    (Table R022)
 31-26    reserved (0)
 25    cache line is dirty
 24    user/supervisor
 23    read/write
 22    0
 21    linear address valid
 20-0    tag
SeeAlso: #R021,#R031

Bitfields for AMD Am5k86 code cache instruction:
Bit(s)    Description    (Table R023)
 31-26    reserved (0)
 25    start bit 1
 24    end bit 1
 23    opcode bit 1
 22-21    map (ROPs/MROM) 1
 20-13    byte 1
 12    start bit 0
 11    end bit 0
 10    opcode bit 0
 9-8    map (ROPs/MROM) 0
 7-0    byte 0
SeeAlso: #R021,#R024,#R032

Bitfields for Am5k86 code cache linear tag:
Bit(s)    Description    (Table R024)
 31-20    reserved (0)
 19-0    bits 31-12 of linear address
SeeAlso: #R021,#R023,#R025,#R032

Bitfields for Am5k86 code cache valid bits:
Bit(s)    Description    (Table R025)
 31-18    reserved (0)
 17    linear tag is valid
 16    user/supervisor
 15-0    bitmask of valid bytes
SeeAlso: #R021,#R023,#R032

Bitfields for Am5k86 code cache branch prediction bits:
Bit(s)    Description    (Table R026)
 31-19    reserved (0)
 18    predicted branch taken
 17-14    offset of last byte of predicted branch instruction within block
 13-12    predicted target column
 11-4    predicted target index
 3-0    target byte
SeeAlso: #R021

Bitfields for Am5k86 4K TLB page:
Bit(s)    Description    (Table R027)
 31-22    reserved (0)
 21    page cache disable
 20    page write-through
 19-0    page frame address
SeeAlso: #R021,#R028,#R029

Bitfields for Am5k86 4K TLB linear tag:
Bit(s)    Description    (Table R028)
 31-20    reserved (0)
 19    global valid bit
 18    TLB entry is dirty
 17    user/supervisor
 16    read/write
 15    entry is valid
 14-0    tag (bits 31-17 of address)
SeeAlso: #R021,#R027,#R030

Bitfields for Am5k86 4M TLB page:
Bit(s)    Description    (Table R029)
 31-12    reserved (0)
 11    page cache disable
 10    page write-through
 9-0    page frame address
SeeAlso: #R021,#R027,#R030

Bitfields for Am5k86 4M TLB linear tag:
Bit(s)    Description    (Table R030)
 31-15    reserved (0)
 14    global valid bit
 13    TLB entry is dirty
 12    user/supervisor
 11    read/write
 10    entry is valid
 9-0    tag (bits 31-22 of address)
SeeAlso: #R021,#R028,#R029

Bitfields for Am5k86 data cache physical tag:
Bit(s)    Description    (Table R031)
 31-23    reserved (0)
 22-21    MESI status
    00 invalid
    01 shared
    10 modified
    11 exclusive
 20-0    tag (bits 31-11 of physical address)
SeeAlso: #R021,#R032

Bitfields for Am5k86 code cache physical tag:
Bit(s)    Description    (Table R032)
 31-21    reserved (0)
 20    valid
 19-0    tag (bits 31-12 of physical address)
SeeAlso: #R021,#R031
----------S00000083--------------------------
MSR 00000083h - AMD Am5k86 (AMD-K5) - HARDWARE CONFIGURATION REGISTER
Size:    8 bits
SeeAlso: MSR 00000082h

Bitfields for AMD Am5k86 (AMD-K5) Hardware Configuration Register:
Bit(s)    Description    (Table R033)
 63-8    reserved
 7    disable data cache
 6    disable instruction cache
 5    disable branch prediction
 4    enable write allocation (stepping 4 and higher only)
 3-1    debug control
    000 off
    001 enable branch trace (requires bit 5 set as well)
    100 enable Probe Mode on debug trap
    other reserved
 0    disable Stopping Processor Clock in Halt and Stop Grant states
SeeAlso: #R020
----------S00000085--------------------------
MSR 00000085h - AMD-K5 - WRITE ALLOCATE TOP-OF-MEMORY AND CONTROL REGISTER
Note:    this MSR is supported on K5 models 1/2/3 stepping 4 and higher only
SeeAlso: MSR 00000086h
!!!amd\21062e.pdf p.95
----------S00000086--------------------------
MSR 00000086h - AMD-K5 - WRITE ALLOCATE PROGRAMMABLE MEMORY RANGE REGISTER
Note:    this MSR is supported on K5 models 1/2/3 stepping 4 and higher only
SeeAlso: MSR 00000085h
----------S00000088--------------------------
MSR 00000088h - Pentium Pro - ???
----------S00000089--------------------------
MSR 00000089h - Pentium Pro - ???
----------S0000008A--------------------------
MSR 0000008Ah - Pentium Pro - ???
----------S0000008B--------------------------
MSR 0000008Bh - Pentium Pro - "BIOS_SIGN" BIOS UPDATE SIGNATURE
Size:    64 bits
Access:    Read/Write
Desc:    used to determine which (if any) microcode update has been loaded into
      the CPU
Notes:    whenever a microcode update is loaded, the PentiumPro modifies the
      operation of the CPUID instruction to store both the standard CPUID
      model information and a 32-bit microcode update ID into this MSR; if
      no microcode update has been loaded, the MSR remains unchanged
      (it is normally cleared to 0 before using CPUID to test for updates)
    the low 32 bits of this register (if modified by CPUID) contains the
      standard model/stepping information, while the high 32 bits contain
      the microcode update ID
SeeAlso: MSR 00000079h
----------S000000AE--------------------------
MSR 000000AEh - Pentium Pro - ???
----------S000000C1--------------------------
MSR 000000C1h - Pentium Pro - "PERFCTR0" PERFORMANCE COUNTER REGISTER 0
Note:    the performance measure counted by this MSR is set through MSR 0186h
SeeAlso: MSR 000000C2h,MSR 00000012h,MSR 00000186h
----------S000000C2--------------------------
MSR 000000C2h - Pentium Pro - "PERFCTR1" PERFORMANCE COUNTER REGISTER 1
Note:    the performance measure counted by this MSR is set through MSR 0187h
SeeAlso: MSR 000000C1h,MSR 00000013h,MSR 00000187h
----------S000000FE--------------------------
MSR 000000FEh - Pentium Pro - "MTRRcap" MEMORY TYPE RANGE REGISTER CAPABILITIES
Desc:    determine how many and what type of Memory Type Range Registers are
      implemented
SeeAlso: MSR 00000200h,MSR 00000250h,MSR 000002FFh
----------S00000116--------------------------
MSR 00000116h - Pentium Pro - ???
----------S00000118--------------------------
MSR 00000118h - Pentium Pro - ???
----------S00000119--------------------------
MSR 00000119h - Pentium Pro - ???
----------S0000011B--------------------------
MSR 0000011Bh - Pentium Pro - ???
----------S00000131--------------------------
MSR 00000131h - Pentium Pro - ???
----------S0000014E--------------------------
MSR 0000014Eh - Pentium Pro - ???
----------S0000014F--------------------------
MSR 0000014Fh - Pentium Pro - ???
----------S00000150--------------------------
MSR 00000150h - Pentium Pro - ???
----------S00000151--------------------------
MSR 00000151h - Pentium Pro - ???
----------S00000154--------------------------
MSR 00000154h - Pentium Pro - ???
----------S0000015B--------------------------
MSR 0000015Bh - Pentium Pro - ???
----------S0000015F--------------------------
MSR 0000015Fh - Pentium Pro - ???
----------S00000174--------------------------
MSR 00000174h - Pentium Pro - ???
----------S00000175--------------------------
MSR 00000175h - Pentium Pro - ???
----------S00000176--------------------------
MSR 00000176h - Pentium Pro - ???
----------S00000179--------------------------
MSR 00000179h - Pentium Pro - "MCG_CAP"
SeeAlso: MSR 0000017Ah,MSR 0000017Bh
----------S0000017A--------------------------
MSR 0000017Ah - Pentium Pro - "MCG_STATUS"
SeeAlso: MSR 00000179h,MSR 0000017Bh
----------S0000017B--------------------------
MSR 0000017Bh - Pentium Pro - "MCG_CTL"
SeeAlso: MSR 00000179h,MSR 0000017Ah
----------S00000186--------------------------
MSR 00000186h - Pentium Pro - "EVNTSEL0" - PERFORM. COUNTER EVENT SELECTION 0
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 000000C1h,MSR 00000187h,MSR 00000011h,MSR 00000012h

Bitfields for Pentium Pro Event Selection MSR:
Bit(s)    Description    (Table R034)
 31-24    CMASK (counter mask)
    compare actual count for event on this clock cycle with mask; only
      increment counter if count >= mask (count < mask if bit 23 set)
 23    invert result of CMASK condition
 22    enable counting of events
 21    reserved
 20    signal performance counter overflows via APIC input
 19    signal performance counter overflows via BP0/BP1 pin
 18    count occurrences, not duration
 17    OS (enable counting in ring 0)
 16    USER (enable counting in rings 1,2,3)
 15-8    UMASK (Unit Mask register; set to 0 to enable all count options)
 7-0    event type (see #R035)

(Table R035)
Values for Pentium Pro/Pentium II performance event type:
 00h-01h    documented as unused
 02h    number of store buffer forwards
 03h    number of store buffer blocks
 04h    number of store buffer drain cycles
 05h    misaligned data memory references
 06h    segment register loads
 07h-0Fh    documented as unused
 10h    executed computational FP operations
 11h    number of microcode-handled FP exceptions
 12h    number of multiplies
 13h    number of divisions
 14h    divider busy cycles
 15h-20h    documented as unused
 21h    L2 address strobes
 22h    L2 cache data bus wait cycles
 23h    L2 cache data bus transfer cycles
 24h    allocated L2-cache lines
 25h    allocated L2 modified lines
 26h    removed L2 lines
 27h    removed modified L2 lines
 28h    instruction fetches from L2 cache
 29h    loads requested from L2 cache
 2Ah    stores into L2 cache
 2Bh-2Dh    documented as unused
 2Eh    total L2 requests
 2Fh-3Fh    documented as unused
 40h    L1 Data Cache Unit load rquests
 41h    L1 DCU store requests
 42h    L1 DCU locked requests
 43h    total L1 memory references
 44h    documented as unused
 45h    L1 allocated lines
 46h    L1 allocated M-state lines
 47h    L1 evicted M-state lines
 48h    L1 outstanding miss cycles (weighted)
 49h    L1 data TLB misses
 4Ah-51h    documented as unused
 52h    (P-II) self-modifying code occurrences
 53h-5Fh    documented as unused
 60h    outstanding bus requests
 61h    number of cycles BNR pin driven
 62h    DRDY# asserted cycles
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 63h    number of cycles with LOCK asserted
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 64h    CPU receiving data cycles
 65h    burst-read transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 66h    read for ownership transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 67h    write-back transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 68h    instruction-fetch transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 69h    invalidate transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 6Ah    partial-write transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 6Bh    partial transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 6Ch    I/O transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 6Dh    deferred transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 6Eh    burst transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 6Fh    memory transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 70h    total of all transactions
    unit mask 20h to get total counts for ALL CPUs, 00h for this CPU only
 71h-78h    documented as unused
 79h    processor not-halted cycles
 7Ah    cycles in which HIT pin is driven
 7Bh    cycles in which HITM pin is driven
 7Ch-7Dh    documented as unused
 7Eh    bus-snoop stall cycles
 7Fh    documented as unused
 80h    instruction fetches
 81h    instruction fetch misses
 82h-84h    documented as unused
 85h    L1 instruction TLB misses
 86h    instruction-fetch stall cycles
 87h    instruction-length decoder stall cycles
 88h-A1h    documented as unused
 A2h    resource-related stall cycles
 A3h-AFh    documented as unused
 B0h    (P-II) MMX instructions executed
 B1h    (P-II) saturated arithmetic instructions executed
 B2h    (P-II) MMX uOPs executed on Port #0--3
 B3h    (P-II) MMX instructions
    unit mask selects type(s): 01h packed multiply, 02h packed shift,
      04h pack operations, 08h unpack operations, 10h packed logical,
      20h packed arithmetic
 B4h-BFh    documented as unused
 C0h    retired instructions
 C1h    retired FLOPs
 C2h    retired uOPs
 C3h    documented as unused
 C4h    retired branch predictions
 C5h    retired mispredicted branches
 C6h    total cycles with interrupts disabled
 C7h    total cycles with interrupts disabled and interrupt(s) pending
 C8h    received hardware interrupts
 C9h    retired taken branches
 CAh    retired taken mispredicted branches
 CBh    documented as unused
 CCh    (P-II) transitions between FP and MMX states
    unit mask: 00h = from MMX to FP, 01h = from FP to MMX
 CDh    (P-II) SIMD assists (EMMS instructions executed)
 CEh    (P-II) MMX instructions retired
 CFh    (P-II) saturated arithmetic instructions retired
 D0h    decoded instructions
 D1h    documented as unused
 D2h    partial stall cycles or events
 D3h    documented as unused
 D4h    (P-II) segment rename stalls
    set unit mask to sum of: 01h for ES, 02h for DS, 04h for FS, 08h for GS
 D5h    (P-II) segment renames (unit mask as for D4h)
 D6h    (P-II) retired segment renames
 D7h-DFh    documented as unused
 E0h    decoded branch instructinos
 E1h    documented as unused
 E2h    BTB misses
 E3h    documented as unused
 E4h    bogus branches (predictions generated for non-branch instructions)
 E5h    documented as unused
 E6h    number of times BACLEAR asserted (number of static branch predictions)
 E7h-FFh    documented as unused
SeeAlso: #R034
----------S00000187--------------------------
MSR 00000187h - Pentium Pro - "EVNTSEL1" - PERFORM. COUNTER EVENT SELECTION 1
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 000000C2h,MSR 00000186h,#R034,MSR 00000011h,MSR 00000013h,#R034
----------S000001D3--------------------------
MSR 000001D3h - Pentium Pro - ???
----------S000001D9--------------------------
MSR 000001D9h - Pentium Pro - "DEBUGCTLMSR" DEBUGGING CONTROL
Size:    16 bits

Bitfields for Pentium Pro Debugging Control MSR:
Bit(s)    Description    (Table R036)
 63-16    reserved
 15    enable execution trace messages
 14    enable execution trace messages
 13-7    reserved
 6    enable execution trace messages
 5    performance monitor/Breakpoint pins
 4    performance monitor/Breakpoint pins
 3    performance monitor/Breakpoint pins
 2    performance monitor/Breakpoint pins
 1    Branch Trap Flag
 0    enable Last Branch records (see MSR 000001DBh,MSR 000001DCh)
----------S000001DB--------------------------
MSR 000001DBh - Pentium Pro - "LASTBRANCHFROMIP"
Desc:    stores the address from which a branch was last taken
SeeAlso: MSR 000001DCh,MSR 000001DDh
----------S000001DC--------------------------
MSR 000001DCh - Pentium Pro - "LASTBRANCHTOIP"
Desc:    stores the destination address of the last taken branch instruction
SeeAlso: MSR 000001DBh,MSR 000001DEh
----------S000001DD--------------------------
MSR 000001DDh - Pentium Pro - "LASTINTFROMIP"
Desc:    stores the address at which an interrupt last occurred
SeeAlso: MSR 000001DBh,MSR 000001DEh
----------S000001DE--------------------------
MSR 000001DEh - Pentium Pro - "LASTINTTOIP"
Desc:    stores the address to which the last interrupt caused a branch
SeeAlso: MSR 000001DCh,MSR 000001DDh
----------S000001E0--------------------------
MSR 000001E0h - Pentium Pro - "ROB_CR_BKUPTMPDR6"
Size:    >= 3 bits

Bitfields for Pentium Pro MSR 000001E0h:
Bit(s)    Description    (Table R037)
 63-3    ???
 2    Fast String Enable (default is enabled)
 1-0    reserved
Note:    if bit 2 is set, REP MOVS moves 64 bits each clock cycle
----------S00000200--------------------------
MSR 00000200h - Pentium Pro - "MTRRphysBase0"
SeeAlso: MSR 000000FEh,MSR 00000201h,MSR 00000202h
----------S00000201--------------------------
MSR 00000201h - Pentium Pro - "MTRRphysMask0"
SeeAlso: MSR 000000FEh,MSR 00000200h,MSR 00000202h
----------S00000202--------------------------
MSR 00000202h - Pentium Pro - "MTRRphysBase1"
SeeAlso: MSR 000000FEh,MSR 00000200h,MSR 00000203h
----------S00000203--------------------------
MSR 00000203h - Pentium Pro - "MTRRphysMask1"
SeeAlso: MSR 000000FEh,MSR 00000201h,MSR 00000202h
----------S00000204--------------------------
MSR 00000204h - Pentium Pro - "MTRRphysBase2"
----------S00000205--------------------------
MSR 00000205h - Pentium Pro - "MTRRphysMask2"
----------S00000206--------------------------
MSR 00000206h - Pentium Pro - "MTRRphysBase3"
----------S00000207--------------------------
MSR 00000207h - Pentium Pro - "MTRRphysMask3"
----------S00000208--------------------------
MSR 00000208h - Pentium Pro - "MTRRphysBase4"
----------S00000209--------------------------
MSR 00000209h - Pentium Pro - "MTRRphysMask4"
----------S0000020A--------------------------
MSR 0000020Ah - Pentium Pro - "MTRRphysBase5"
----------S0000020B--------------------------
MSR 0000020Bh - Pentium Pro - "MTRRphysMask5"
----------S0000020C--------------------------
MSR 0000020Ch - Pentium Pro - "MTRRphysBase6"
----------S0000020D--------------------------
MSR 0000020Dh - Pentium Pro - "MTRRphysMask6"
----------S0000020E--------------------------
MSR 0000020Eh - Pentium Pro - "MTRRphysBase7"
----------S0000020F--------------------------
MSR 0000020Fh - Pentium Pro - "MTRRphysMask7"
----------S00000250--------------------------
MSR 00000250h - Pentium Pro - "MTRRfix64K_00000"
Desc:    control the 64K region from 00000h to 0FFFFh
SeeAlso: MSR 000000FEh,MSR 00000200h,MSR 00000258h
----------S00000258--------------------------
MSR 00000258h - Pentium Pro - "MTRRfix16K_80000"
Desc:    control the 16K region from 80000h to 83FFFh
SeeAlso: MSR 000000FEh,MSR 00000250h,MSR 00000259h
----------S00000259--------------------------
MSR 00000259h - Pentium Pro - "MTRRfix16K_A0000"
Desc:    control the 16K region from A0000h to A3FFFh
----------S00000268--------------------------
MSR 00000268h - Pentium Pro - "MTRRfix4K_C0000"
Desc:    control the 4K region from C0000h to C0FFFh
----------S00000269--------------------------
MSR 00000269h - Pentium Pro - "MTRRfix4K_C8000"
Desc:    control the 4K region from C8000h to C8FFFh
----------S0000026A--------------------------
MSR 0000026Ah - Pentium Pro - "MTRRfix4K_D0000"
Desc:    control the 4K region from D0000h to D0FFFh
----------S0000026B--------------------------
MSR 0000026Bh - Pentium Pro - "MTRRfix4K_D8000"
Desc:    control the 64K region from D8000h to D8FFFh
----------S0000026C--------------------------
MSR 0000026Ch - Pentium Pro - "MTRRfix4K_E0000"
Desc:    control the 64K region from E0000h to E0FFFh
----------S0000026D--------------------------
MSR 0000026Dh - Pentium Pro - "MTRRfix4K_E8000"
Desc:    control the 64K region from E8000h to E8FFFh
----------S0000026E--------------------------
MSR 0000026Eh - Pentium Pro - "MTRRfix4K_F0000"
Desc:    control the 64K region from F0000h to F0FFFh
----------S0000026F--------------------------
MSR 0000026Fh - Pentium Pro - "MTRRfix4K_F8000"
Desc:    control the 64K region from F8000h to F8FFFh
----------S000002FF--------------------------
MSR 000002FFh - Pentium Pro - "MTRRdefType"
SeeAlso: MSR 000000FEh,MSR 00000200h,MSR 00000250h

Bitfields for Pentium Pro MSR 000002FFh:
Bit(s)    Description    (Table R038)
 63-12    reserved
 11    "MTRRenable" enable Memory Type Register registers
 10    Fixed MTRR enable
 9-3    reserved
 2-0    default memory type
----------S00000400--------------------------
MSR 00000400h - Pentium Pro - "MC0_CTL" Machine Check Control 0
SeeAlso: MSR 00000401h,MSR 00000402h,MSR 00000404h,MSR 0000410h
----------S00000401--------------------------
MSR 00000401h - Pentium Pro - "MC0_STATUS" Machine Check Status 0
SeeAlso: MSR 00000400h,MSR 00000403h

Bitfields for Pentium Pro Machine Check Status:
Bit(s)    Description    (Table R048)
 63    "MC_STATUS_V"
 62    "MC_STATUS_O"
 61    "MC_STATUS_UC"
 60    "MC_STATUS_EN"
 59    "MC_STATUS_MISCV"
 58    "MC_STATUS_ADDRV"
 57    "MC_STATUS_DAM"
 56-32    reserved
 31-16    "MC_STAT_MSCOD"
 15-0    "MC_STAT_MACCOD"
----------S00000402--------------------------
MSR 00000402h - Pentium Pro - "MC0_ADDR" Machine Check Address 0
SeeAlso: MSR 00000400h,MSR 00000403h
----------S00000403--------------------------
MSR 00000403h - Pentium Pro - "MC0_MISC"
SeeAlso: MSR 00000401h,MSR 00000402h
----------S00000404--------------------------
MSR 00000404h - Pentium Pro - "MC1_CTL" Machine Check Control 1
SeeAlso: MSR 00000400h,MSR 00000408h
----------S00000405--------------------------
MSR 00000405h - Pentium Pro - "MC1_STATUS" Machine Check Status 1
----------S00000406--------------------------
MSR 00000406h - Pentium Pro - "MC1_ADDR" Machine Check Address 1
----------S00000407--------------------------
MSR 00000407h - Pentium Pro - "MC1_MISC"
----------S00000408--------------------------
MSR 00000408h - Pentium Pro - "MC2_CTL" Machine Check Control 2
SeeAlso: MSR 00000400h,MSR 00000404h,MSR 0000040Ch
----------S00000409--------------------------
MSR 00000409h - Pentium Pro - "MC2_STATUS" Machine Check Status 2
----------S0000040A--------------------------
MSR 0000040Ah - Pentium Pro - "MC2_ADDR" Machine Check Address 2
----------S0000040B--------------------------
MSR 0000040Bh - Pentium Pro - "MC2_MISC"
----------S00000408--------------------------
MSR 0000040Ch - Pentium II - "MC4_CTL" Machine Check Control 4
SeeAlso: MSR 000040Dh,MSR 00000400h,MSR 00000404h,MSR 00000408h
----------S00000409--------------------------
MSR 0000040Dh - Pentium II - "MC4_STATUS" Machine Check Status 4
SeeAlso: MSR 000040Ch,MSR 000040Eh
----------S0000040A--------------------------
MSR 0000040Eh - Pentium II - "MC4_ADDR" Machine Check Address 4
SeeAlso: MSR 000040Ch,MSR 000040Dh
----------S00000408--------------------------
MSR 00000410h - Pentium Pro - "MC3_CTL" Machine Check Control 3
SeeAlso: MSR 00000400h,MSR 00000404h,MSR 0000040Ch
----------S00000409--------------------------
MSR 00000411h - Pentium Pro - "MC3_STATUS" Machine Check Status 3
----------S0000040A--------------------------
MSR 00000412h - Pentium Pro - "MC3_ADDR" Machine Check Address 3
----------S0000040B--------------------------
MSR 00000413h - Pentium Pro - "MC3_MISC"
----------S00001000--------------------------
MSR 00001000h - IBM 386/486 SLC - PROCESSOR OPERATION REGISTER
Size:    19 bits
Access:    Read/Write
SeeAlso: MSR 00001001h,MSR 00001002h

Bitfields for IBM 386/486 SLC Processor Operation Register:
Bit(s)    Description    (Table R039)
 63-19    reserved
 18    (486SLC only) Low Power PLA
 17    (486SLC only) Bus Read
 16    (486SLC only) Cache Parity Generate Error
 15    enable cacheability of NPX operands
 14    enable PWI ADS
 13    enable Low Power Halt Mode (HLT instruction stops CPU clock)
 12    extended Out instruction (CPU waits for READY after any output)
 11    cache reload bit
 10    enable internal KEN# signal
 9    disable cache lock mode
 8    reserved
 7    enable cache
 6    enable DBCS
 5    enable Power Interrupt
 4    enable Flush Snooping
 3    enable Snoop Input
 2    address line A20 mask (see also #2440,#P121)
 1    enable cache parity checking
 0    Cache Parity Error occurred
SeeAlso: #R040,#R041
----------S00001000--------------------------
MSR 00001000h - Pentium Pro - DEBUG REGISTER 0
SeeAlso: MSR 00001001h"Pro",MSR 00001007h"Pro"
----------S00001001--------------------------
MSR 00001001h - IBM 386/486 SLC - CACHE REGION CONTROL REGISTER
Size:    48 bits
SeeAlso: MSR 00001000h,MSR 00001002h

Bitfields for IBM 386/486 SLC Cache Region Control Register:
Bit(s)    Description    (Table R040)
 63-48    reserved
 47-32    extended memory cache memory limit (number of 64K blocks above 1M
      which may be cached)
 31-16    first megabyte read-only flags (each bit represents 64K)
 15-0    first megabyte cacheable flags (each bit represents 64K)
SeeAlso: #R039,#R041
----------S00001001--------------------------
MSR 00001001h - Pentium Pro - DEBUG REGISTER 1
SeeAlso: MSR 00001000h"Pro",MSR 00001002h"Pro"
----------S00001002--------------------------
MSR 00001002h - IBM 386/486 SLC - PROCESSOR OPERATION REGISTER
Size:    30 bits
SeeAlso: MSR 00001000h,MSR 00001001h,MSR 00001004h

Bitfields for IBM 386/486 SLC Processor Operation Register:
Bit(s)    Description    (Table R041)
 63-30    reserved
 29    enable External Dynamic Frequency Shift
 28    Dynamic Frequency Shift ready
 27    Dynamic Frequency Shift Mode
 26-24    clocking mode
    000 clock x1
    011 clock doubler
    100 clock tripler
 23-0    reserved
SeeAlso: #R039,#R040
----------S00001002--------------------------
MSR 00001002h - Pentium Pro - DEBUG REGISTER 2
SeeAlso: MSR 00001001h"Pro",MSR 00001003h"Pro"
----------S00001003--------------------------
MSR 00001003h - Pentium Pro - DEBUG REGISTER 3
SeeAlso: MSR 00001002h"Pro",MSR 00001004h"Pro"
----------S00001004--------------------------
MSR 00001004h - IBM 486BL3 - PROCESSOR CONTROL REGISTER
Size:    24 bits
SeeAlso: MSR 00001000h

Bitfields for IBM 486BL3 Processor Control Register:
Bit(s)    Description    (Table R042)
 63-24    reserved
 23    OS/2 boot (0=DD1 hardware, 1=DD0 hardware)
 22    MOV CR0,x Decode
    0: DD0, DD1A, DD1B, DD1D hardware
    1: DD1C hardware
 21    reserved
 20    Cache Low Power (DD1 only: cache disabled when not in use)
 19    reserved
 18    NOP timing
    0: 2 cycles on DD0, 3 cycles on DD1
    1: 3 cycles on DD0, 2 cycles on DD1
 17    bus pipelining for 16-bit accesses
 16-5    ???
 4    MOVS split
 3    power-saving cache feature
 2    reserved
 1    enable MOV CRx decode
    (reserved on DD1B, DD1C)
 0    reserved
SeeAlso: MSR 00001000h
----------S00001004--------------------------
MSR 00001004h - Pentium Pro - DEBUG REGISTER 4
SeeAlso: MSR 00001003h"Pro",MSR 00001005h"Pro"
----------S00001005--------------------------
MSR 00001005h - Pentium Pro - DEBUG REGISTER 5
SeeAlso: MSR 00001004h"Pro",MSR 00001006h"Pro"
----------S00001006--------------------------
MSR 00001006h - Pentium Pro - DEBUG REGISTER 6
SeeAlso: MSR 00001005h"Pro",MSR 00001007h"Pro"
----------S00001007--------------------------
MSR 00001007h - Pentium Pro - DEBUG REGISTER 7
SeeAlso: MSR 00001006h"Pro",MSR 00001000h"Pro",MSR 00002000h"Pro"
----------S00002000--------------------------
MSR 00002000h - Pentium Pro - CONTROL REGISTER 0
SeeAlso: MSR 00001000h"Pro",MSR 00002002h"Pro"
----------S00002002--------------------------
MSR 00002002h - Pentium Pro - CONTROL REGISTER 2
SeeAlso: MSR 00002000h"Pro",MSR 00002003h"Pro"
----------S00002003--------------------------
MSR 00002003h - Pentium Pro - CONTROL REGISTER 3
SeeAlso: MSR 00002002h"Pro",MSR 00002004h"Pro"
----------S00002004--------------------------
MSR 00002004h - Pentium Pro - CONTROL REGISTER 4
SeeAlso: MSR 00002003h"Pro",MSR 00002000h"Pro"
----------S80000000--------------------------
MSR 80000000h - Pentium - MACHINE CHECK EXCEPTION ADDRESS
Size:    64 bits
Access:    Read
SeeAlso: MSR 00000000h,MSR 80000001h
----------S80000001--------------------------
MSR 80000001h - Pentium - MACHINE CHECK EXCEPTION TYPE
Size:    6 bits
Access:    Read
SeeAlso: MSR 00000001h,MSR 80000000h
----------S80000002--------------------------
MSR 80000002h - Pentium - (TR1) PARITY REVERSAL TEST REGISTER
Size:    14 bits
Access:    Write
SeeAlso: MSR 00000002h
----------S80000003--------------------------
MSR 80000003h - Pentium - unimplemented
SeeAlso: MSR 00000003h
----------S80000004--------------------------
MSR 80000004h - Pentium - (TR2) INSTRUCTION CACHE END BITS
Size:    4 bits
Access:    Read/Write
SeeAlso: MSR 00000004h
----------S80000005--------------------------
MSR 80000005h - Pentium - (TR3) CACHE DATA TEST REGISTER
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 00000005h
----------S80000006--------------------------
MSR 80000006h - Pentium - (TR4) CACHE TAG
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 00000006h
----------S80000007--------------------------
MSR 80000007h - Pentium - (TR5) CACHE CONTROL
Size:    15 bits
Access:    Write
SeeAlso: MSR 00000007h
----------S80000008--------------------------
MSR 80000008h - Pentium - (TR6) TLB COMMAND
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 00000008h
----------S80000009--------------------------
MSR 80000009h - Pentium - (TR7) TLB DATA
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 00000009h
----------S8000000A--------------------------
MSR 8000000Ah O - Pentium A-step - (TR8) 36-BIT TLB DATA TEST REGISTER
Size:    4 bits
SeeAlso: MSR 0000000Ah,#R009
----------S8000000B--------------------------
MSR 8000000Bh - Pentium - (TR9) BRANCH TARGET BUFFER TAG
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 0000000Bh
----------S8000000C--------------------------
MSR 8000000Ch - Pentium - (TR10) BRANCH TARGET BUFFER TARGET
Size:    32 bits
Access:    Read/Write
SeeAlso: MSR 0000000Ch
----------S8000000D--------------------------
MSR 8000000Dh - Pentium - (TR11) BRANCH TARGET BUFFER CONTROL
Size:    12 bits
Access:    Write
SeeAlso: MSR 0000000Dh
----------S8000000E--------------------------
MSR 8000000Eh - Pentium - (TR12) NEW FEATURE CONTROL
Size:    10 bits
Access:    Write
SeeAlso: MSR 0000000Eh
----------S8000000F--------------------------
MSR 8000000Fh - Pentium - ???
Size:    1 bit???
Access:    Write
SeeAlso: MSR 0000000Fh
----------S80000010--------------------------
MSR 80000010h - Pentium - TIME STAMP COUNTER
Size:    64 bits
Access:    Read/Write
SeeAlso: MSR 00000010h
----------S80000011--------------------------
MSR 80000011h - Pentium - EVENT COUNTER SELECTION AND CONTROL
Size:    26 bits
Access:    Read/Write
SeeAlso: MSR 00000011h,MSR 80000012h,MSR 80000013h
----------S80000012--------------------------
MSR 80000012h - Pentium - EVENT COUNTER #0
Size:    40 bits
Access:    Read/Write
SeeAlso: MSR 00000012h,MSR 80000011h,MSR 80000013h
----------S80000013--------------------------
MSR 80000013h - Pentium - EVENT COUNTER #1
Size:    40 bits
Access:    Read/Write
SeeAlso: MSR 00000013h,MSR 80000011h,MSR 80000012h
----------S80000014--------------------------
MSR 80000014h - Pentium - ???
Access:    Read
SeeAlso: MSR 00000014h
----------S80000015--------------------------
MSR 80000015h - Pentium - unimplemented???
----------S80000016--------------------------
MSR 80000016h - Pentium - unimplemented???
----------S80000017--------------------------
MSR 80000017h - Pentium - unimplemented???
----------S80000018--------------------------
MSR 80000018h - Pentium - ??? (PAGING-RELATED)
Size:    4 bits???
Access:    Read
----------S80000019--------------------------
MSR 80000019h - Pentium - FLOATING POINT - LAST PREFETCHED OPCODE
Size:    11 bits
Access:    Read
Desc:    this register stores the opcode of the last floating-point opcode to
      be prefetched by the CPU
SeeAlso: MSR 8000001Ah,MSR 8000001Bh

Bitfields for Pentium Floating-Point Opcode:
Bit(s)    Description    (Table R043)
 63-11    reserved (0)
 10-8    low three bits of first byte of floating-point instruction
 7-0    second byte of floating-point instruction
Note:    both a standalone FWAIT and the instruction D8h 9Bh are represented
      as 09Bh
----------S8000001A--------------------------
MSR 8000001Ah - Pentium - FLOATING POINT - LAST NON-CONTROL OPCODE
Size:    11 bits
Access:    Read
SeeAlso: MSR 80000019h,MSR 8000001Bh,#R043
----------S8000001B--------------------------
MSR 8000001Bh - Pentium - FLOATING POINT - LAST EXCEPTION OPCODE
Size:    11 bits
Access:    Read/Write
SeeAlso: MSR 80000019h,MSR 8000001Ah,#R043
----------S8000001C--------------------------
MSR 8000001Ch - Pentium - ???
Size:    4 bits???
Access:    Read
----------S8000001D--------------------------
MSR 8000001Dh - Pentium - PROBE MODE CONTROL REGISTER
Size:    32 bits
Access:    Read/Write

Bitfields for Probe Mode Control Register:
Bit(s)    Description    (Table R044)
 31    (read-only) System Management Mode is active
 30-3    reserved (0)
 2    PB1 monitors breakpoint #1 matches instead of performance counter #1
 1    PB0 monitors breakpoint #0 matches instead of performance counter #0
 0    ICEBP enabled (every debug exception enters Probe Mode)
----------S8000001E--------------------------
MSR 8000001Eh - Pentium - ???
Size:    32 bits
Access:    Read/Write
Note:    this may be nothing more than a scratchpad register
SeeAlso: MSR 8000001Fh
----------S8000001F--------------------------
MSR 8000001Fh - Pentium - ???
Size:    32 bits
Access:    Read/Write
Note:    this may be nothing more than a scratchpad register
SeeAlso: MSR 8000001Eh
----------SC0000080--------------------------
MSR C0000080h - AMD K6 - EXTENDED FEATURE ENABLE REGISTER
Size:    1 bit
SeeAlso: MSR C0000081h,MSR C0000082h

Bitfields for AMD K6 Extended Feature Enable Register:
Bit(s)    Description    (Table R045)
 63-1    reserved
 0    system call extension (SYSCALL/SYSRET) enabled
    when disabled, both instructions generate an Undefined Opcode
      exception
Note:    CPUID 80000001h should be checked to determine whether the SYSCALL
      extension is implemented by the processor
SeeAlso: #R046
----------SC0000081--------------------------
MSR C0000081h - AMD K6 - SYSCALL TARGET ADDRESS
Size:    48 bits
Note:    if SYSCALL is supported (as indicated by CPUID; SYSCALL is not
      yet implemented in current steppings of the K6), this MSR specifies
      the address to which the SYSCALL instruction (opcode 0Fh 05h -- same
      as 80286 LOADALL!) transfers control, provided it has also been
      enabled via MSR C0000080h
SeeAlso: MSR C0000080h,MSR C0000082h

Bitfields for AMD K6 SYSCALL Target Address Register:
Bit(s)    Description    (Table R046)
 63-48    reserved
 47-32    CS and SS selector base for SYSCALL/SYSRET
 31-0    target EIP address for SYSCALL
SeeAlso: #R045
----------SC0000081--------------------------
MSR C0000081h - AMD K6 - WRITE-HANDLING CONTROL REGISTER
Size:    9 bits
SeeAlso: MSR C0000080h,MSR C0000081h

Bitfields for AMD K6 Write-Handling Control Register:
Bit(s)    Description    (Table R047)
 63-9    reserved
 8    write cacheability detection enabled
 7-1    write allocate enable limit (in 4M units)
    memory above this limit will not be accessed without a write-allocate
 0    write allocate enabled for 15-16M region
Note:    the Intel Triton chipset does not support write cacheability detection,
      so bit 8 should be kept clear
--------!---CREDITS--------------------------
Christian Ludloff's 80x86.CPU
Alex V. Potemkin's Opcodes List (OPCODES.LST)
Intel Pentium Pro Family User's Guide, Volume 3, Appendix C
--------!---Admin----------------------------
Highest Table Number = R048
--------!---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 INTER57A through INTER57D (preferably the original
authenticated PKZIP archives), and the utility and hypertext conversion
programs in three additional archives called INTER57E.ZIP to INTER57G.ZIP.

Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998 Ralf Brown
--------!---CONTACT_INFO---------------------
Internet: [e-mail] (currently forwards to [e-mail])
FIDO: Ralf Brown 1:129/26.1
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