%! Detailed register description file for PCICFG.EXE by Ralf Brown
%!
%! Filename 80867110.PCI = Vendor 8086h, Device 7110h
%!    Intel 82731AB PIIX4 PCI-to-ISA Bridge
%! Last Edit 31 Dec 1997 by Andy Sawyer
%!
%! Reference : Intel document 29056201.PDF
%! "82371AB PCI-TO-ISA/IDE XCELERATOR (PIIX4)"
%!
%! Since the 82371AB indicates that it is a "single function" device
%! for all functions except function 0, version 1,0 of PCICFG.EXE
%! does not correctly display all functions.
%!
%! See also:
%!    80867111.PCI
%!    80867112.PCI
%!    80867113.PCI
!begin

Intel 82371AB PIIX4 PCI-to-ISA Bridge registers in detail:     [by Andy Sawyer]
 ISA I/O Recovery Time
  DMA Reserved Page Register Aliasing  %[4C:7]Ed
  8-bit I/O Recovery                   %[4C:6]ed - %[4C:5-3]{81234567} SYSCLK
  16-bit I/O Recovery                  %[4C:2]ed - %[4C:1-0]{3124} SYSCLK

 X-Bus Chip Select

  Microcontroler Location Enable       %[4E:10]ed
  1-Meg Extended BIOS Enable           %[4E:9]ed
  I/O APIC                             %[4E:8]ed
  Extended BIOS Enable                 %[4E:7]ed
  Lower BIOS Enable                    %[4E:6]ed
  Coprocessor Error Fucntion Enable    %[4E:5]ed
  IRQ12/Mouse Control                  %[4E:4]|IRQ12;Mouse|
  Port 61h Alias Enable                %[4E:3]ed
  BIOSCS# Write Protect Control        %[4E:2]|Read Only;Read Write|
  Keyboard Controller I/O Ports        %[4E:1]ed
  Real-Time Clock I/O ports            %[4E:0]ed

 PIRQRC Route Control
  PIRCQA Routing                       %[60:7]Ed - %[60:3-0](PIRQCRRoute)
  PIRCQB Routing                       %[61:7]Ed - %[61:3-0](PIRQCRRoute)
  PIRCQC Routing                       %[62:7]Ed - %[62:3-0](PIRQCRRoute)
  PIRCQD Routing                       %[63:7]Ed - %[63:3-0](PIRQCRRoute)

 Serial IRQ Control
  Serial IRQ Enable                    %[64:7]ed
  Serial IRQ Mode                      %[64:6]|Quiet;Continuous|
  Serial IRQ Frame Size                %[64:5-2+17]d
  Start Frame Pulse Width              %[64:1-0]|4;6;8;Reserved|

 Top of Memory Register
  Top of Memory                        %[69:7-4+1]d Mbyte
  ISA/DMA Lower BIOS                   %[69:3]|not ;|forwarded to PCI
  640k-768k Memory Region              %[69:2]|not ;|forwarded to PCI
  ISA/DMA 512k-640k Region             %[69:1]|not ;|forwarded to PCI

 Misc. Status Register
  SERR# Generation                     %[6A:15]d
  Host-to-PCI Bridge Retry enable      %[6A:7]ed

 Motherboard Device DMA Control 0
  Type F DMA Buffer Enabled            %[76:7]ed
  Type F DMA Channel Routing           %[76:2-0](MBDMA)
 Motherboard Device DMA Control 1
  Type F DMA Buffer Enabled            %[77:7]ed
  Type F DMA Channel Routing           %[77:2-0](MBDMA)

 APIC Base Address Relocation Register
  A12 Mask                             %[80:6]d
  Base Address                         FEC0%[80:5-2]x%[80:1-0]x00h

 Detrministic Latency Control Register
  SERR# on delayed transaction timeout %[82:3]ed
  USB Passive Release                  %[82:2]ed
  Passive Release                      %[82:1]ed
  Delayed Transactions                 %[82:0]ed

 PCI DMA Configuration
  DMA Channel 7                        %[90:15-14](DMAType)
  DMA Channel 6                        %[90:13-12](DMAType)
  DMA Channel 5                        %[90:11-10](DMAType)
  DMA Channel 3                        %[90:7-6](DMAType)
  DMA Channel 2                        %[90:5-4](DMAType)
  DMA Channel 1                        %[90:3-2](DMAType)
  DMA Channel 0                        %[90:1-0](DMAType)

 Distributed DMA Slave Base Pointer Registers
  Channel 0-3                          %[92:15-6<6]4x
  Channel 5-7                          %[94:15-6<6]4x

 General Configuration Register
  KBCCS#                          %[B0:31]|KBCCS#;GPO26|
  RTCALE                          %[B0:30]|RTCALE;GPO25|
  RTCCS#                          %[B0:29]|RTCCS#;GPO24|
  XOE#/XDIR#                      %[B0:28]|XOE#/XDIR#;GPO22/GPO23|
  RI#                             %[B0:27]|RI#;GPI12|
  LID                             %[B0:25]|LID;GPI10|
  BATLOW#                         %[B0:24]|BATLOW#;GPI9|
  THRM#                           %[B0:23]|THRM#;GPI8|
  SUS_STAT2#                      %[B0:22]|SUS_STAT2#;GPO21|
  SUS_STAT1#                      %[B0:21]|SUS_STAT1#;GPO20|
  ZZ                              %[B0:20]|ZZ;GPO19|
  PCI_STP#                        %[B0:19]|PCI_STP#;GPO18|
  CPU_STP#                        %[B0:18]|CPU_STP#;GPO17|
  SUSB#/SUSC#                     %[B0:17]|SUSB#/SUSC#;GPO15/16|
  SERIRQ                          %[B0:16]|GPI7;SERIRQ|
  SMBALERT#                       %[B0:15]|SMBALERT#;GPI11|
  IRQ8#                           %[B0:14]|GPI6;IRQ8#|
  PC/PCI REQC/GNTC                %[B0:10]|GPI4/GPO11;REQC/GNTC|
  PC/PCI REQB/GNTB                %[B0:9]|GPI3/GPO10;REQB/GNTB|
  PC/PCI REQA/GNTA                %[B0:8]|GPI2/GPO9;REQA/GNTA|

  Decode configuration            %[B0:1]|Subtractive;Positive|
  PnP Address Decode              %[B0:6]ed
  Alternate Access Mode           %[B0:5]ed
  IDE Secondary Interface         %[B0:4]Ed

  Secondary IDE Signal Interface  %[B0:12]|Enabled;Tri-State|
  Primary   IDE Signal Interface  %[B0:11]|Enabled;Tri-State|

  CONFIG2 Status                  %[B0:3]d
  CONFIG1 Status                  %[B0:2]d (%[B0:2]|Pentium;Pentium II|)
  ISA/EIO Select                  %[B0:0]|EIO;ISA|

 Real Time Clock Configuration
  RTC Positive Decode  %[CB:5]ed
  Lock Upper RAM Bytes %[CB:4]ed
  Lock Lower RAM Bytes %[CB:3]ed
  Upper RAM Enable     %[CB:2]ed
  RTC Enable           %[CB:0]ed

!end

!enum PIRQCRRoute
Reserved
Reserved
Reserved
IRQ 3
IRQ 4
IRQ 5
IRQ 6
IRQ 7
Reserved
IRQ 9
IRQ 10
IRQ 11
IRQ 12
Reserved
IRQ 14
IRQ 15
!end

!enum MBDMA
DMA Channel 0
DMA Channel 1
DMA Channel 2
DMA Channel 3
Disabled
DMA Channel 5
DMA Channel 6
DMA Channel 7
!end

!enum DMAType
Normal ISA DMA
PC/PCI DMA
Distributed DMA
Reserved
!end

%! end of file