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Intel D15343-003 manual RID Register Identification, Subc Sub Class Code Register

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Intel® 82854 Graphics Memory Controller Hub (GMCH)

4.8.5RID – Register Identification

Address Offset:	08h
Default Value:	02h
Access:	Read only
Size:	8 bits

This register contains the revision number of the GMCH Device #0. These bits are read only and writes to this register have no effect.

Bit	Descriptions

7:0	Revision Identification Number (RID): This is an 8-bit value that indicates the revision
	identification number for the GMCH Device #0.

4.8.6SUBC – Sub Class Code Register

Address Offset:	0Ah
Default Value:	00h
Access:	Read only
Size:	8 bits

This register contains the Sub-Class Code for the GMCH Device #0. This code is 00h indicating a Host Bridge device.

Bit	Descriptions

7:0	Sub-Class Code (SUBC): This is an 8-bit value that indicates the category of Bridge into which
	the GMCH falls. The code is 00h indicating a Host Bridge.

54	D15343-003

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Intel D15343-003 manual RID Register Identification, Subc Sub Class Code Register

Contents

Datasheet Intel 82854 Graphics Memory Controller Hub GmchD15343-003 Contents Intel 82854 Graphics Memory Controller Hub Gmch 10.9 127 Figures 152 Revision History Date Revision DescriptionIntel 82854 Graphics Memory Controller Hub Gmch Overview Processor/Host Bus SupportMemory System System Interrupts Video Stream DecoderVideo Overlay Internal Graphics Features DisplayIntel 82854 Graphics Memory Controller Hub Gmch Graphic Power Management Power ManagementHub Interface to ICH4-M Intel 854 Chipset system block diagram Native Graphic mode PackageTerminology Terms and DescriptionsTerm Description ICH4-M Reference Documents Reference DocumentsDocument Location Intel 82854 Graphics Memory Controller Hub Gmch System Architecture Intel 82854 GmchDDR Sdram Memory Capacity Processor Host InterfaceGmch System Memory Interface Technology WidthGmch Analog Display Port Graphics FeaturesDisplay Features Gmch Integrated DVO PortsHub Interface Address Decode PoliciesRatio Gmch ClockingIntel 82854 Gmch Interface Clocks Bytes MB/sSystem Interrupts Notation Description Buffer DescriptionHost Interface Signals Host Interface Signal DescriptionsHITM# DRDY#HIT# HLOCK#RS20# RS20# Response typeSRAS# DDR Sdram InterfaceDDR Sdram Interface Descriptions SCAS#Hub Interface Signals Hub Interface SignalsClocks DAC Clocking Display Power Management Signaling This signal is used onlyDpms DrefclkInternal Graphics Display Signals Digital Video Output B Dvob Port Signal DescriptionsDigital Video Output B Dvob Port Digital Video Output C Dvoc Port Signal Descriptions Digital Video Output C Dvoc PortDvob and Dvoc Port Common Signal Descriptions Analog CRT Display Signal DescriptionsAnalog CRT Display General Purpose Input/Output Signals Gpio Signal DescriptionsVoltage References, PLL Power Voltage References, PLL PowerHlvref HlrcompPswing VcchlConceptual Overview of the Platform Configuration Structure Device Number AssignmentGmch Function Bus #0, Device# Nomenclature for Access Attributes Nomenclature for Access AttributesStandard PCI Bus Configuration Mechanism Routing Configuration AccessesPCI Bus #0 Configuration Mechanism Register Definitions Primary PCI and Downstream Configuration MechanismDefault Value upon Reset Reserved BitsConfigaddress Configuration Address Register I/O Mapped RegistersBit Descriptions ReservedConfigdata Configuration Data Register Configuration Data RegisterIndex Data Registers VGA I/O Mapped RegistersVGA I/O Mapped Register List Name Function Read @ Write @Gmch Configuration Space Device #0, Function#0 Register Name Default Value AccessEnd Attbase VID Vendor Identification Register Did Device Identification RegisterBit Descriptions 150 Pcicmd PCI Command Register = Serr message is not generated by the Gmch for Device #0PCI Status Register RID Register Identification Subc Sub Class Code RegisterBCC Base Class Code Register HDR Header Type RegisterSvid Subsystem Vendor Identification Register SID Subsystem Identification Register Capptr Capabilities Pointer RegisterCapid Capabilities Identification Register Device #0 Capability IDMDA Present MDAP-R/W Rrbar Access Enable-R/WGMC Gmch Miscellaneous Control Register Device #0 VGAReserved Device #2 Function #1 Enable/Disable GGC Gmch Graphics Control Register Device #0Bit Dafc Device and Function Control Register Device #0 Fdhc Fixed Dram Hold Control Register Device #0Bit Description 17 PAM60 Programmable Attribute Map Register Device #0 Attribute Bit AssignmentBits 7 Bits 6 Bits 5 Bits 4 Description Reserved PAM Registers Video Buffer Area A0000h-BFFFFh PAM Registers and Associated System Memory SegmentsDOS Application Area 00000h-9FFFh Expansion Area C0000h-DFFFFhExtended System Bios Area E0000h-EFFFFh System Bios Area F0000h-FFFFFhSmram System Management RAM Control Register Device #0 Esmramc Extended System Management RAM Control Device #0 Errsts Error Status Register Device #0 Errcmd Error Command Register Device #0 Smicmd SMI Error Command Register Device #0 Bit Description ReservedSCI on Single-bit ECC Error Scicmd SCI Error Command Register Device #0Reserved SCI on Multiple-bit ECC Error SCI on Gmch Thermal Sensor TripC2 state Gmch FSB Interface Power Management Control Reserved On Die Termination ODT Gating DisableReserved FSB Data Bus Power Management Control Shic Secondary Host Interface Control Register Device #0HEM Host Error Control, Status, and Observation Device #0 DRB VID Vendor Identification Register Pcicmd PCI Command Register Pcists PCI Status Register RID Revision Identification Register Device. Reads and Writes to this location have no effect DRB Dram Row 03 Boundary Register Device #0 DRA Dram Row Attribute Register Device #0 DRT Dram Timing Register Device #0 DDR Internal Write to Read Command delay tWTRDDR Write Recovery time tWR Examples of usageEncoding CK between RD and RD commands Encoding CK between RD and WR commandsBack To Back Read-Read commands spacing DDR, different Rows Refresh Cycle Time tRFCActivate to Precharge delay tRAS, MAX Activate to Precharge delay tRAS, MINReserved CAS# Latency tCL Dynamic Memory Interface Power Management PCEn Page Close Enable TC Timer Control PDEn23CS# Signal Drive Control Rcven DLL shutdown disablePower State S1/S3 Refresh Control DRC Dram Controller Mode Register Device #0 Ddim DDR Sdram Data Integrity Mode010 000001 011For Double Data Rate DTC Dram Throttling Control Register Device #0 DDR Sdram Throttle Mode Tmode Wttc2724 Thermal Power Throttle Control fields Enable High Priority Stream Throttling EnableHpllcc Did Device Identification Register Pcicmd PCI Command Register Pcists PCI Status Register Subc Sub-Class Code Register ID Subsystem Identification Register Hpllcc Hpll Clock Control Register Device #0 Hpll VCO Change Sequence Initiate BitDVO Port CRT Port Straps Read GFX CoreHPLLCC20 RateRegister Name RegsVID Vendor Identification Register Device #2 Did Device Identification Register Device #2Pcicmd PCI Command Register Device #2 Pcists PCI Status Register Device #2 RID Revision Identification Register Device #2CLS Cache Line Size Register Device #2 MLT Master Latency Timer Register Device #2CC Class Code Register Device #2 Base Class Code Basec 03=Display controllerHDR Header Type Register Device #2 Bit Description Master Latency Timer Count Value ROPrefetchable Memory-RO Enable prefetching Gmadr Graphics Memory Range Address Register Device #2Prefetchable Memory-RO Prevents prefetching Mmadr Memory Mapped Range Address Register Device #2Iobar I/O Base Address Register Device #2 Memory / IO Space-RORomadr Video Bios ROM Base Address Registers Device #2 Svid Subsystem Vendor Identification Register Device #2SID Subsystem Identification Register Device #2 Intrline Interrupt Line Register Device #2 Intrpin Interrupt Pin Register Device #2Mingnt Minimum Grant Register Device #2 Pmcap Power Management Capabilities Register Device #2 Auxiliary Power Source Hardwired toMaxlat Maximum Latency Register Device #2 Pmcs Power Management Control/Status Register Device #2 Bits10 Power StateSystem Memory Address Ranges Simplified View of System Address MapDOS Compatibility Area Detailed View of System Address MapLegacy VGA Ranges 0A0000h-0BFFFFh System Memory Segments and Their AttributesDOS Area 000000h-09FFFFh Compatible Smram Address Range 0A0000h-0BFFFFhExtended System Memory Area Extended System Bios Area 0E0000h-0EFFFFhSystem Bios Area 0F0000h-0FFFFFh Monochrome Display Adapter MDA Range 0B0000h 0B7FFFhPre-allocated System Memory 1 15 MB-16 MB WindowPre-allocated System Memory Attributes CommentsTseg Extended Smram Address Range Hseg and TsegHseg Dynamic Video Memory Technology DvmtHigh Bios Area FFE00000h -FFFFFFFFh PCI Memory Address Range Top of Main System Memory to 4 GBSystem Management Mode SMM Memory Range SMM Space RestrictionsSMM Space Definition System Memory Shadowing 5 I/O Address SpaceSMM Space Transaction Handling Gmch Decode Rules and Cross-Bridge Address Mapping PCI I/O Address MappingHub Interface Accesses to Gmch that Cross Device Boundaries Hub Interface Decode RulesCycles Initiated Using PCI Protocol Accesses to Gmch that Cross Device BoundariesInterface Decode Rules System Bus Interrupt Delivery Host Interface OverviewDynamic Bus Inversion Relation of DBI Bits to Data BitsSystem Memory Interface System Memory Organization and ConfigurationConfiguration Mechanism for DDR DIMMs Upstream Interrupt MessagesData Bytes on DDR Dimm Used for Programming Dram Registers DDR Sdram Performance DescriptionSystem Memory Register Programming Byte FunctionIntegrated Graphics Overview 1 3D/2D Instruction ProcessingViewport Transform and Perspective Divide Setup Engine2 3D Engine 2.3 3D Primitives and Data Formats SupportTexture Engine Backface CullingScan Converter Perspective Correct Texture SupportTexture Chromakey Anti-AliasingTexture Map Filtering Cubic Environment Mapping Raster EngineMultiple Texture Composition Bump MappingColor Shading Modes Texture Map BlendingCombining Intrinsic and Specular Color Components Color DitheringAlpha Blending Color Buffer Formats Destination AlphaDepth Buffer Projective Textures 4 2D EngineStencil Buffer 4.1 256-Bit Pattern Fill and BLT EnginePlanes and Engines Hardware Cursor Plane Native Graphic Mode onlyDual Display Usage Model Native Graphic Mode only Alpha Stretch BLTOverlay Plane Color Control Dynamic Bob and WeaveHardware Motion Compensation Video FunctionalityMPEG-2 Decoding Sub-picture SupportInternal Graphic Display Interface Pipe a Timing Generator Unit1.2 H, V timing signals for active and blank timing Arib SupportParameters HSYNC/VSYNC Field TimingBlend Function Interlaced Video Field displayInterlace support for Plane a graphics Arib 960 X 540 support Interlace support for Video Overlay Window DVO Control Data BitsTiming Register Switching Analog Display Port Characteristics Integrated RamdacDDC Display Data Channel 146 D15343-003 Power and Thermal Management General Description of Supported CPU States General Description of Acpi StatesInternal Thermal Sensor OverviewHysteresis Operation External Thermal Sensor Input UsageStrapping Configuration Strapping Signals and ConfigurationPin Name Strap Description Configuration Type Buffer Type Intel 82854 Gmch Straps for Frequency/CPU Configuration GST20FSB Freq DDR Freq Gfx Freq Core Vcc Ballout and Package Information VCC/VSS Voltage Groups Voltage Levels and Ball Out for Voltage GroupsName Voltage Level Ball out Row Column Signal Name Ballout Table156 D15343-003 D15343-003 157 158 D15343-003 D15343-003 159 160 D15343-003 D15343-003 161 162 D15343-003 D15343-003 163 Intel 82854 Gmch Micro-FCBGA Package Dimensions Top View Package Mechanical InformationIntel 82854 Gmch Micro-FCBGA Package Dimensions Side View Intel 82854 Gmch Micro-FCBGA Package Dimensions Bottom View