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Intel 815 manual System Address Map, System Memory Space

Models: 815

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Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

3.System Address Map

This chapter provides address maps of the graphics controller (GC) I/O and memory-mapped registers. Individual register bit field descriptions are provided in the following chapters. Note that PCI configuration register descriptions are not covered in this document. For details on PCI configuration registers, refer to the Intel® 815 Chipset: 82815 Graphics and Memory Controller (GMCH) EDS.

Figure 5 shows a high-level representation of the system memory address map. Figure 6 provides additional details on mapping specific memory regions as defined and supported by the GMCH chipset.

Figure 5. System Memory Address Map

4 GB

Top of the Main Memory

0

PCI

Memory

Address

Range

Main

Memory

Address

Range

Local Memory

Memory Mapped

Range Range

Independently

Programmable Non-

Overlapping Memory

Windows

mem_map_s

Figure 6. Detailed Memory System Address Map

Extended

P6

Memory

PCI

Memory

Range

Main Memory

Range

DOS

Compatibility

Memory

System Memory

Space

64 GB

4 GB Max TOM

AGP

Graphics

Window

Aperture

0FFFFFh

1 MB

512 MB

Upper BIOS Area

0F0000h

(64 KB)

960 KB

0EFFFFh

Lower BIOS Area

(64 KB; 16 KB x 4)

0E0000h

896 KB

0DFFFFh

16 MB

Expansion Card

Optional ISA Hole

15 MB

BIOS

and Buffer Area

(128 KB;

16 KB x 8)

0C0000h

768 KB

0BFFFFh

Std PCI/ISA

1 MB

Optionally

Video Mem

mapped to the

(SMM Mem)

internal AGP

128 KB

640 KB

0A0000h

640 KB

09FFFFh

DOS Area

(640 KB)

000000h

0 MB

0 KB

mem_map2.vsd

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Image 29

Intel 815 manual System Address Map, System Memory Space

Contents

Programmer’s Reference Manual PRM Intel 815 Chipset Graphics Controller Intel 815 Chipset Graphics Controller PRM, Rev Contents 100 106 141 Monosrccopyimmediateblt Gfxrenderstatemaplodlimits 15.4.3.3 HORZPH-Horizontal Phase Register 279 15.4.3.4 16.2.5 Figures Tables Date Revision HistoryRev This page is intentionally left blank Term Description IntroductionTerminology MCH Reference Documents Intel 815 Chipset Overview Intel 82815 Chipset Gmch Overview I/O Controller Hub Host Interface Intel 82815 Chipset Gmch Block Diagram Multiplexed AGP and Display Cache Interface Data Rate Signaling LevelSystem Memory Interface Intel 82815 Chipset Gmch Integrated Graphics Support Hub Interface Three PCI Devices on Gmch Gmch Power DeliverySystem Clocking Front Side Bus System Memory Display Cache Interface Multi-Mode Capability Requirements Supported Single Monitor and Multi-monitor Configurations Configuration Single Monitor Multi-monitor System Startup Device Mode Auto-Detect Flowchart Software Start-Up Sequence Graphics Driver Startup Switching Device modes System Memory Space System Address Map Graphics Controller Register Memory and I/O Map Memory and I/O Space Registers Reserved 50000h−5FFFFh. Reserved in the Intel 815 chipset GC Register Memory Address Map Address Offset Symbol Register Name AccessVGA and VGA Extended Registers Instruction and Interrupt Control Registers 01000h −02FFFh Instpm OV0ADD Ssladd Display and Cursor Control Registers 70000h-7FFFFh VGA and Extended VGA Register Map Address Register Name Read Register Name Write 2D Registers VGA and Extended VGA I/O and Memory Register Map Index Sym Register Name Indirect VGA and Extended VGA Register IndicesIndex Sym Description 2D Attribute Controller Registers 3C0h / 3C1h CR0F Graphics Address Translation GTT Memory Buffers for GC’s Instruction Interface Graphics Translation Table GTT Range Definition This page is intentionally left blank Vendor Id Device Id PCI Device Characteristics Basic Initialization ProceduresInitialization Sequence Hardware Detection Probe Frame Buffer Initialization Hardware State Hardware Register InitializationColor vs. Monochrome Monitors Protect Registers Locking and Unlocking Saving the Hardware State Restoring the Hardware State Intel 815 Chipset Graphics Controller PRM, Rev Intel 815 Chipset Graphics Controller PRM, Rev This page is intentionally left blank BLT Engine Programming Considerations When the Source and Destination Locations OverlapBlt Engine Programming Source Bblt3.vsd Destination Source Bblt4.vsd Contiguous vs. Discontinuous Graphics Data Basic Graphics Data Considerations Source Data Monochrome Source Data Pattern Data -- Always an 8x8 Array of Pixels Pattern Data Bpp Pattern Data -- Occupies 64 Bytes 8 quadwords Destination Data Pattern Fill -- a Very Simple BLT BLT Programming Examples Pattern Data for Example Pattern Fill BLT Results of Example Pattern Fill BLT On-Screen Destination for Example Character Drawing BLT Drawing Characters Using a Font Stored in System Memory Intel 815 Chipset Graphics Controller PRM, Rev Results of Example Character Drawing BLT Standard VGA Registers Initialization RegistersSmram Registers SMRAM-System Management RAM Control Register Device RAM Bit Description Initialization and Usage of Stolen Memory Display and Cursor Control Registers Clock Control and Power Management RegistersLCD/TV-Out CRT Controller Registers 3B4h/3D4h/3B5h/3D5h Graphics Controller Registers 3CEh / 3CFh MSR Initialization Values for VGA Registers GR01 00h This page is intentionally left blank Frame Buffer Access Intel 815 Chipset Graphics Controller PRM, Rev General Control & Status Registers VGA and Extended VGA RegistersName Function Read Write Memory Offset Bit 1. ST00Input Status ST01Input Status Display Enable OutputBit Descriptions Vertical Retrace/Video Reserved. Read as Vsync Control FCRFeature Control CRT HSync Polarity MSRMiscellaneous OutputCRT VSync Polarity SRXSequencer Index Sequencer Registers 2. SR00Sequencer Reset Shift 3. SR01Clocking Mode 4. SR02Plane/Map Mask Bit 10,4 Map Number Table Location 5. SR03Character FontBit 32 Map Number Table Location Made according to the value of the Plane Mask Register SR02 6. SR04Memory Mode Register Graphics Controller Registers 7. SR07Horizontal Character Counter ResetGRXGRX Graphics Controller Index Register Bit Description Horizontal Character Counter 3. GR01Enable Set/Reset Register 2. GR00Set/Reset Register 5. GR03Data Rotate Register 4. GR02Color Compare Register 6. GR04Read Plane Select Register 7. GR05Graphics Mode Register Bits 65=1x Bits 65=00Bits 65=01 Write Mode Odd/Even ModeRead Mode Bit Graphics/Text Mode8. GR06Miscellaneous Register Bit Mask 9. GR07Color Don’t Care Register10. GR08Bit Mask Register Packed Mode Enable Reserved To Local Memory Enable11. GR10Address Mapping VGA Buffer/Memory Map Select Supported 12. GR11Page Selector 13. GR141FSoftware Flags Memory Offset Address 3CFh Index=14h-1fh Default Attribute ARXAttribute Controller Index Register Attribute Controller Registers 3. AR10Mode Control Register 2. AR000FPalette Registers 0FPalette Bits P5, P4 Select Pixel Width/Clock Select Enable Line Graphics Character Code Enable Blinking/Select Background IntensityGraphics/Alphanumeric Mode Pixel Panning Compatibility Bit 54 ST01 Bit 5. AR12Memory Plane Enable Register4. AR11Overscan Color Register Reserved 6. AR13Horizontal Pixel Panning RegisterPixel Text Color Pixel Text Graphics 7. AR14Color Select Register VGA Color Palette Registers DACMASKPixel Data Mask Register DACRXPalette Read Index Register DACSTATEDAC State RegisterDACWXPalette Write Index Register Bits Index Register Indicated DACDATAPalette Data Register CRT Controller Register CRXCRT Controller Index Register Display Fields and Dimensions CRxx Control Registers 4. CR02Horizontal Blanking Start Register 3. CR01Horizontal Display Enable End Register2. CR00Horizontal Total Register 6. CR04Horizontal Sync Start Register Bit Amount of Delay5. CR03Horizontal Blanking End Register 7. CR05Horizontal Sync End Register 9. CR07Overflow Register 8. CR06Vertical Total Register 115 116 10. CR08Preset Row Scan Register 11. CR09Maximum Scan Line Register Double Scanning Enable 13. CR0BText Cursor End Register 12. CR0AText Cursor Start Register 14. CR0CStart Address High Register 16. CR0EText Cursor Location High Register 15. CR0DStart Address Low Register 18. CR10Vertical Sync Start Register 17. CR0FText Cursor Location Low Register 19. CR11Vertical Sync End Register CR13Offset Register 20. CR12Vertical Display Enable End Register 22. CR14Underline Location Register CR146 CR176 Addressing ModeCount By CR145 CR173 Address Incrementing Interval 24. CR16Vertical Blanking End Register 23. CR15Vertical Blanking Start Register CR146 CR176 25. CR17CRT Mode ControlWord Mode or Byte Mode Select Row Scan Counter Compatibility Mode Support Memory Address Counter Address Bits DWord Mode CR17 bit 1=1 CR17 bit 1=0 CR17 bit 0=1 CR17 bit 0=0 Frame Buffer Address Decoder 27. CR22Memory Read Latch Data Register 26. CR18Line Compare Register 29. CR30Extended Vertical Total Register 30. CR31Extended Vertical Display End Register 31. CR32Extended Vertical Sync Start Register 32. CR33Extended Vertical Blanking Start Register Extended Horizontal Total MSB that extends CR00 33. CR35 Extended Horizontal Total Time Register34. CR39Extended Horizontal Blank Time Register 35. CR40Extended Start Address Register 37. CR42Extended Start Address High Register 36. CR41Extended Offset Register 39. CR80I/O Control Interlace Enable38. CR70Interlace Control Register 41. CR82Blink Rate Control 40. CR81Reserved Overview Programming InterfaceReserved Bits and Software Compatibility GC Instruction Streams GC Register ProgrammingInstruction Use Instruction Transport Overview Interrupt Ring Instruction Parser Ring Buffer Registers Ring Buffers RB Ring Buffer Use Characteristic DescriptionRing Buffer Initialization Batch Buffer Sequence Batch Buffers Wait Instructions Instruction ArbitrationArbitration Rationale Instruction Arbitration Rules Batch Buffer Protected ModeInstruction Arbitration Points Instructions Instruction FormatInstruction Parser Instructions 3129 2824 210 Bits Client Instruction Graphics Controller Instructions Client Introduction Instruction Parser InstructionsInstruction Descriptions DWord Bit Description Reserved MBZ Opcode 01hOpcode 02h DWord Bit Gfxcmdparserwaitforevent DWord Bits Description Dwordlength 00h Opcode 15hReserved 00000h Dword Length 00h Instruction Target 14hFlip type 0 Synch flip, 1 Async flip Opcode 07h Opcode 16h Arbitration ON/OFF Opcode 08hInstruction Target 11h Instruction Target 12h Word Bits Description Instruction Target 30h Gfxcmdparserbatchbuffer BLT Engine Instructions InstructionsBLTs To and From Cacheable Memory Setupblt Setup Foreground Color SLB & TB only Setup Background Color AllInstruction Target Opcode 00h Dword Length 06h Dword Length 07h Instruction Target Opcode 10hColor Depth Raster Operation Instruction Target Opcode 20h PixelbltInstruction Target Opcode 21h Destination X2 Coordinate Ending Right Dword Length 04h TextbltInstruction Target Opcode 22h Instruction Target Opcode 30h TEXTImmediateBLTImmediate Data DW Immediate Data DWs 2 through Dwordlength DWL Instruction Target Opcode 40h ColorbltDword Length 03h Solid Pattern Color Instruction Target Opcode 41h Patblt Monopatblt Mono Pattern Transparency Mode 1 = transparency enabledInstruction Target Opcode 42h Pattern Background Color Instruction Target Opcode 43h Srccopyblt Line Instruction Target Opcode 44h Source Foreground Color Source Background Color Instruction Target Opcode 61h Mono Source Transparency Mode 1 = transparency enabled Instruction Target Opcode 45h Destination Transparency Mode See BR00 definitionFullblt Destination Transparency Color Fullmonosrcblt Instruction Target Opcode 46h Dword Length 09h Instruction Target Opcode 47h 181 Dword Length 0Ah Instruction Target Opcode 48h 183 12.3.1. BR00-BLT Opcode and Control BLT Engine Instruction Definitions 185 SolPat Rsvd Mono 187 12.3.4. BR03-Clip Rectangle Y2 Address 12.3.3. BR02-Clip Rectangle Y1 Address 3128 Reserved. Must be Zero 2716 12.3.5. BR04-Clip Rectangle X1 12.3.7. BR06-Setup Expansion Foreground Color 12.3.6. BR05-Setup Expansion Background Color 12.3.8. BR07-Setup Color Pattern Address 12.3.9. BR08-Destination X1 12.3.11. BR10-Destination Y2 Address 12.3.10. BR09-Destination Address and Destination Y1 Address Source Pitch Offset or Monochrome Source Quadwords 12.3.13. BR12-Source Address Increment/Decrement Select 12.3.14. BR13-BLT Raster OP, Control, and Destination Pitch Dynamic Color Depth Source Select Mode 12.3.15. BR14-Destination Width & Height 12.3.16. BR15-Color Pattern Address 3124 Reserved. Must be Zero 230 12.3.18. BR17-Pattern Expansion Foreground Color 12.3.20. BR19-Source Expansion Foreground Color DSLH-Destination Scan Line Height SSLADD-Source Scan Line Address DSLRADD-Destination Scan Line Read Address 204 Gfxprimitive Rendering Engine InstructionsAxis Aligned Rectangles Primitive Winding Order Primitive Rendering Instruction Format Position MaskBias Vertex Attribute Comments Variable Length Vertex Formats for Rendering Instructions Gfxvertex Gfxrenderstatevertexformat Rendering Block 1Eh GfxblockBlock Type Block Pattern Format Prediction Type DWord BitsVertical Motion Vector Precision 00 = 1/2 pixel 212 Precision Format Range Non-pipelined State VariablesMotion Vector Format Gfxrenderstatemaptexels Gfxrenderstatemapcoordsets Normalized Coordinate Set Mask 0 = Do not update 1 = Update Update Coordinate Set Index The valid range isOpcode 1h Normalized Coordinate Set Gfxrenderstatemapinfo Walk Discrete Integrated Base Utilize Fence Tiled Surface Dwordlength 2h 3DstateMW 1DhReserved 0h Surface Format 1511 Color Space Conversion Enable 221 Gfxrenderstatemapfilter Opcode 2h Reserved 00h Mip Mode Filter Valid values are Opcode 3h Gfxrenderstatemaplodlimits Opcode 4h Texture LOD Dither Weight Mask 0 = Do not update 1 = UpdateGfxrenderstatemaplodcontrol Opcode 82h Gfxrenderstatemappaletteload3DStateMWNPNon-pipelined 1Dh Blend Equation Description Gfxrenderstatemapcolorblendstages 3DState24 00h Update Blending Stage Index The valid range isWrite result to Current Register or Accumulator Select Replicate Arg1 Alpha to Color Channels Invert Color Arg2 Gfxrenderstatemapalphablendstages Invert Alpha Arg2 3DState24 01hInvert Alpha Arg1 Instruction 1h Gfxrenderstatecolorfactor Gfxrenderstatecolorchromakey Kill Pixel Mode KeyedPixelControl KeyedPixelControl Write Mask 0 = Do not update 1 = UpdateInstruction 2h Monochrome Specular Full Color RGB GfxrenderstatesrcdstblendmonoNo Specular 236 Opcode Source / Destination Blend State 3DState24NP Non-pipelined 14h Alpha Reference State Mask 1 = Update 0 = Do Not UpdateGfxrenderstatezbiasalphafuncref Gfxrenderstatelinewidthcullshade Mode Specular Shade Mode State Mask 1 = Update 0 = Do Not Update Alpha Shade Mode State Mask 1 = Update 0 = Do Not UpdateColor Shade Mode State Mask 1 = Update 0 = Do Not Update 2824 3DState24 02h Color Index Key Enable Mask 1 = Update 0 = Do Not Update Alpha Setup Enable Enable Mask 1 = Update 0 = Do Not UpdateSpecular Enable State Mask 1 = Update 0 = Do Not Update GFXRENDERSTATEBOOLEANENA1 Frame Buffer Write Enable Mask 1 = Update 0 = Do Not Update Specular Dither Enable Mask 1 = Update 0 = Do Not UpdateBuffer Write Enable Mask 1 = Update 0 = Do Not Update GFXRENDERSTATEBOOLEANENA2 3DState24NP Non-pipelined 15h GfxrenderstatefogcolorGfxrenderstatedrawingrectangleinfo Opcode 80h 3DStateMWNP Non-pipelined 1Dh Scissor Rectangle Enable Mask 1 = Update 0 = Do Not Update Gfxrenderstatescissorenable3DState16NP Non-pipelined 1Ch Opcode 10h Opcode 81h Gfxrenderstatescissorrectangleinfo Stipple Pattern Stipple PatternOpcode 83h Gfxrenderstateantialiasing Vertex Sequence Gfxrenderstateprovokingvtxpixelization Rule Pixelization Rule Mask Small Triangle Filter Enable Mask Opcode 85h Gfxrenderstatedestbuffervariables Dest Buffer Format 0h = Any 8-bit Surface Drawing and Scissor Rectangles Programming Hints/Rules Color Calculator 255 256 Programming Notes Clock Control Registers Example Programming Sequence DCLK2 DCLK0D-Display Clock 0 Divisor Register DCLK1D-Display Clock 1 Divisor Register DCLK2D-Display Clock 2 Divisor Register LCDCLKD-LCD Clock Divisor Register Reserved VCO Loop Divide LCD Clock DCLK0DS-Display & LCD Clock Divisor Select RegisterPost Divisor Select LCD Clock VCO Loop Divide clock Post Divisor Select clock Internal DAC Enable PWRCLKC-Power Management and Miscellaneous Clock Control Overlay Registers Comment Register/Instruction Category Updating Register Values 15.1. OV0ADD-Overlay 0 Register Update Address Register DOV0STA-Display/Overlay 0 Status Register GAMC50-Gamma Correction Registers Gamma Correction Green Blue Red Three times Mathematical Gamma Correction For Overlay Latch Address Gamma Correction Theory Of Operation Gamma Hardware Implementation Overlay Buffer Pointer Registers Memory Offset RegistersOBUF0Y-Overlay Buffer 0 Y Pointer Register Format Alignment OBUF0U-Overlay Buffer 0 U Pointer Register OBUF1Y-Overlay Buffer 1 Y Pointer Register Bit Descriptiont OBUF0V-Overlay Buffer 0 V Pointer RegisterOBUF1U-Overlay Buffer 1 U Pointer Register 15.4.2.1. OV0STRIDE-Overlay 0 Stride Register Overlay Stride RegistersOBUF1V-Overlay Buffer 1 V Pointer Register YRGBVPH-Y/RGB Vertical Phase Register Overlay Initial Phase Registers HORZPH-Horizontal Phase Register UVVPH-UV Vertical Phase Register INITPH-Initial Phase Register DWINSZ-Destination Window Size Register Overlay Destination Window Position/Size RegistersDWINPOS-Destination Window Position Register SWID-Source Width Register Overlay Source Size Registers SWIDQW-Source Width In QWords Register SHEIGHT-Source Height Register YRGBSCALE-Y/RGB Scale Factor Register Overlay Scale Factor Registers UVSCALE-UV Scale Factor Register 15.4.7.2. OV0CLRC1-Overlay 0 Color Correction 1 Register Overlay Color Correction Registers15.4.7.1. OV0CLRC0-Overlay 0 Color Correction 0 Register DCLRKV-Destination Color Key Value Register Overlay Destination Color Key Registers DCLRKM-Destination Color Key Mask Register Destination Constant Alpha Blend EnableAlways Constant Alpha Blend Enable SCLRKVH-Source Color Key Value High Register Overlay Source Color Key Registers SCLRKM-Source Color Key Mask Register SCLRKVL-Source Color Key Value Low Register Source Constant Alpha Blend Enable 15.4.10.1. OV0CONF-Overlay Configuration Register Overlay Configuration Registers 15.4.11. OV0CMD-Overlay Command Register Vertical Luminance Filter. Vertical Luminance Filter Vertical Chrominance Filter. Vertical Chrominance Filter Automatic flipping Manual flip commandSource Format 297 AWINPOS-Alpha Blend Window Position Register Overlay Alpha Blend Window Position/Size Registers AWINSZ-Alpha Blend Window Size Register Overlay Flip Instruction 300 FENCE-Graphics Memory Fence Table Registers Instruction, Memory, and Interrupt Control RegistersInstruction Control Registers Tile walk Reserved for address bits 31 downtoFence size Fence Pitch Normal Invalidation Mechanism PGTBLCTL-Page Table Control Register PGTBLER-Page Table Error Register Error Type PGTBLERRMSK-Page Table Error Mask Register Command Streamer DMA Page Table Error Mask Buffer Unit Page Table Error MaskOverlay Page Table Error Mask Display Page Table Error Mask Intel 810 Chipset and Intel815 Chipset Errata RINGBUF-Ring Buffer Registers Ring Buffer Valid Reserved DWord Description Offset HWSPGA-Hardware Status Page Address Register IPEHR-Instruction Parser Error Header Register debug IPEIR-Instruction Parser Error Identification Register debug INSTDONE-Instruction Stream Interface Done Register This read only register reports engine done signals NOPID-NOP Identification Register Disable State Variable Updates INSTPM-Instruction Parser Mode Register INSTPS-Instruction Parser State Register debug Cscpr State Machine Command Parser ABBSTR-Active Batch Buffer Start Address Register debug BBPPTR-Batch Buffer Parser Pointer Register debug Current DMA Address Reserved User of the DMA Engine ABBEND-Active Batch Buffer End Address Register debugDMAFADD-DMA Engine Fetch Address debug Reserved Host Graphics Prefetch Mode MEMMODE-Memory Interface Mode Register debugGraphics Address Translation Mode Instruction Fifo Debug Mode Bit Definition For Interrupt Control Registers Interrupt Control Registers 321 HWSTAM-Hardware Status Mask Register Interrupt Enables. See Table IER-Interrupt Enable Register Interrupt Identity. See. Table IIR-Interrupt Identity Register Interrupt Mask Bits. See. Table IMR-Interrupt Mask Register ISR-Interrupt Status Register Table Error handling in Intel 815 Chipset Error Identity, Mask and Status Registers Table Error Resetting the Page Table Error EMR-Error Mask Register EIR-Error Identity Register ESR-Error Status Register FWBLC-FIFO Watermark and Burst Length Control Display Interface Control 332 HTOTAL-Horizontal Total Register LCD / TV-Out Register Description HBLANK-Horizontal Blank Register HSYNC-Horizontal Sync Register VTOTAL-Vertical Total Register VBLANK-Vertical Blank Register VSYNC-Vertical Sync Register Sync Polarity Control LCD / TV-Out EnableLCDTVC-LCD/TV-Out Control Register FP / 740 Data Ordering FP Vesa VGA ModeFpvsync Control Fphsync Control Fphsync Output Control Border EnableActive Data Order Active Data Polarity BCLRPAT- Border Color Pattern Register OVRACT-Overlay Active Register DRT-DRAM Row Type Local Memory Interface Bit RAS#-to-CAS# delay t RCD Reserved Paging Mode Control PMCDRAMCL-DRAM Control Low Bit RAS# act. To precharge t RAS Refresh to RAS# act. t RC DRAMCH-DRAM Control High 346 HSYNC/VSYNC Control1916 19. I/O Control RegistersHVSYNC-HSYNC/VSYNC Control Register GPIOAGeneral Purpose I/O Control Register a Gpio Registers Value .bit GPIOBGeneral Purpose I/O Control Register B 351 352 Line Counter for Display Display And Cursor RegistersDISPSL-Display Scan Line Count Inclusive / Exclusive DISPSLC-Display Scan Line Count Range Compare Reserved Display path Graphics Gamma Enable. See note PIXCONF-Pixel Pipeline ConfigurationOverlay path Gamma Enable. See note Pixel Pipeline Control Bit DAC Enable Display Color ModeEnable Extended Status Read Mode CRT Overscan Color Transition from VGA modes to hires mode or opposite GUI ModeBLTCNTL-BLT Control SWF13-Software Flag Registers DPLYBASE-Display Base Address Register Vertical Sync Status Enable Reserved Flat Panel Hot Plug Detect EnableDisplay Line Compare Enable DPLYSTAS-Display Status Select Register Overlay Registers Upated Enable Vertical Blank EnableOverlay Registers Updated Status Vertical Sync Status Reserved Cursor Coordinate System Origin Select Hardware CursorCURCNTR-Cursor Control Register CURPOS-Cursor Position Register CURBASE-Cursor Base Address Register Appendix a Mode Parameters Parameters for Screen Resolution/Refresh Rate 320x20070Hz = Parameters for Screen Resolution/Refresh Rate 320x24070Hz = Parameters for Screen Resolution/Refresh Rate 352X48070Hz = Parameters for Screen Resolution/Refresh Rate 352X57670Hz = Parameters for Screen Resolution/Refresh Rate 400x30070Hz = Parameters for Screen Resolution/Refresh Rate 512X38470Hz = Parameters for Screen Resolution/Refresh Rate 640x35085Hz = Parameters for Screen Resolution/Refresh Rate 640x40070Hz = Parameters for Screen Resolution/Refresh Rate 640x40085Hz = Parameters for Screen Resolution/Refresh Rate 640x48060Hz = Parameters for Screen Resolution/Refresh Rate 640x48070Hz = Parameters for Screen Resolution/Refresh Rate 640x48072Hz = Parameters for Screen Resolution/Refresh Rate 640x48075Hz = Parameters for Screen Resolution/Refresh Rate 640x48085Hz = Parameters for Screen Resolution/Refresh Rate 720x40085Hz = Parameters for Screen Resolution/Refresh Rate 720x48060Hz = Parameters for Screen Resolution/Refresh Rate 720x48075Hz = Parameters for Screen Resolution/Refresh Rate 720x48085Hz = Parameters for Screen Resolution/Refresh Rate 720x57660Hz = Parameters for Screen Resolution/Refresh Rate 720x57675Hz = Parameters for Screen Resolution/Refresh Rate 720x57685Hz = Parameters for Screen Resolution/Refresh Rate 800x60056Hz = Parameters for Screen Resolution/Refresh Rate 800x60060Hz = Parameters for Screen Resolution/Refresh Rate 800x60070Hz = Parameters for Screen Resolution/Refresh Rate 800x60072Hz = Parameters for Screen Resolution/Refresh Rate 800x60075Hz = Parameters for Screen Resolution/Refresh Rate 800x60085Hz = Parameters for Screen Resolution/Refresh Rate 854X48060Hz = Parameters for Screen Resolution/Refresh Rate 854X48075Hz = Parameters for Screen Resolution/Refresh Rate 854X48085Hz = 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 Intel around the world