2. GR00Set/Reset Register | Intel 815 instruction

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

9.3.2.GR00Set/Reset Register

I/O (and Memory Offset) Address:				3CFh (index=00h)
Default:				0Uh (U=Undefined)
Attributes:				Read/Write
7				4	3	2	1	0
			Reserved (0000)		Set/Reset	Set/Reset	Set/Reset	Set/Reset
					Plane 3	Plane 2	Plane 1	Plane 0


		Bit			Description

7:4			Reserved. Read as 0s.

3:0			Set/Reset Plane [3:0]. When the Write Mode bits (bits 0 and 1) of the Graphics Mode Register (GR05)
			are set to select Write Mode 0, all 8 bits of each byte of each memory plane are set to either 1 or 0 as
			specified in the corresponding bit in this register, if the corresponding bit in the Enable Set/Reset
			Register (GR01) is set to 1.

When the Write Mode bits (bits 0 and 1) of the Graphics Mode Register (GR05) are set to select Write Mode 3, all processor data written to the frame buffer is rotated, then logically ANDed with the contents of the Bit Mask Register (GR08), and then treated as the addressed data’s bit mask, while value of these four bits of this register are treated as the color value.

9.3.3.GR01Enable Set/Reset Register

I/O (and Memory Offset) Address:				3CFh (Index=01h)
Default:				0Uh (U=Undefined)
Attributes:				Read/Write
7				4	3	2	1	0
			Reserved (0000)		Enable	Enable	Enable	Enable
					Set/	Set/ Reset	Set/	Set/ Reset
					Reset Pln	Pln	Reset Pln	Pln
					3	2	1	0


		Bit			Description

7:4			Reserved. Read as 0s.

3:0			Enable Set/Reset Plane [3:0]. This register works in conjunction with the Set/Reset Register (GR00).
			The Write Mode bits (bits 0 and 1) must be set for Write Mode 0 for this register to have any effect.

0 = The corresponding memory plane can be read from or written to by the processor without any special bitwise operations taking place.

1 = The corresponding memory plane is set to 0 or 1 as specified in the Set/Reset Register (GR00).

91

Image 91

Intel 815 manual 2. GR00Set/Reset Register, 3. GR01Enable Set/Reset Register

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 Rev Revision HistoryDate This page is intentionally left blank Terminology IntroductionTerm Description MCH Reference Documents Intel 815 Chipset Overview Intel 82815 Chipset Gmch Overview I/O Controller Hub Host Interface Intel 82815 Chipset Gmch Block Diagram System Memory Interface Data Rate Signaling LevelMultiplexed AGP and Display Cache Interface Intel 82815 Chipset Gmch Integrated Graphics Support Hub Interface Front Side Bus System Memory Display Cache Interface Gmch Power DeliveryThree PCI Devices on Gmch System Clocking 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 Instruction and Interrupt Control Registers 01000h −02FFFh Address Offset Symbol Register Name AccessGC Register Memory Address Map VGA and VGA Extended Registers 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 Description Indirect VGA and Extended VGA Register IndicesIndex Sym Register Name 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 Hardware Detection Probe Basic Initialization ProceduresVendor Id Device Id PCI Device Characteristics Initialization Sequence Frame Buffer Initialization Protect Registers Locking and Unlocking Hardware Register InitializationHardware State Color vs. Monochrome Monitors 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 When the Source and Destination Locations OverlapBLT Engine Programming Considerations 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 SMRAM-System Management RAM Control Register Device Initialization RegistersStandard VGA Registers Smram Registers RAM Bit Description Initialization and Usage of Stolen Memory LCD/TV-Out Clock Control and Power Management RegistersDisplay and Cursor Control Registers 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 Offset VGA and Extended VGA RegistersGeneral Control & Status Registers Name Function Read Write Memory Bit 1. ST00Input Status Vertical Retrace/Video Display Enable OutputST01Input Status Bit Descriptions Reserved. Read as Vsync Control FCRFeature Control CRT VSync Polarity MSRMiscellaneous OutputCRT HSync Polarity SRXSequencer Index Sequencer Registers 2. SR00Sequencer Reset Shift 3. SR01Clocking Mode 4. SR02Plane/Map Mask Bit 32 Map Number Table Location 5. SR03Character FontBit 10,4 Map Number Table Location Made according to the value of the Plane Mask Register SR02 6. SR04Memory Mode Register Bit Description Horizontal Character Counter 7. SR07Horizontal Character Counter ResetGraphics Controller Registers GRXGRX Graphics Controller Index Register 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=01 Bits 65=00Bits 65=1x Read Mode Odd/Even ModeWrite Mode 8. GR06Miscellaneous Register Graphics/Text ModeBit 10. GR08Bit Mask Register 9. GR07Color Don’t Care RegisterBit Mask VGA Buffer/Memory Map Select Reserved To Local Memory EnablePacked Mode Enable 11. GR10Address Mapping 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 Pixel Width/Clock Select 2. AR000FPalette Registers 0F3. AR10Mode Control Register Palette Bits P5, P4 Select Pixel Panning Compatibility Enable Blinking/Select Background IntensityEnable Line Graphics Character Code Graphics/Alphanumeric Mode 4. AR11Overscan Color Register 5. AR12Memory Plane Enable RegisterBit 54 ST01 Bit Pixel Text Graphics 6. AR13Horizontal Pixel Panning RegisterReserved Pixel Text Color 7. AR14Color Select Register VGA Color Palette Registers DACMASKPixel Data Mask Register Bits Index Register Indicated DACSTATEDAC State RegisterDACRXPalette Read Index Register DACWXPalette Write Index Register DACDATAPalette Data Register CRT Controller Register CRXCRT Controller Index Register Display Fields and Dimensions CRxx Control Registers 2. CR00Horizontal Total Register 3. CR01Horizontal Display Enable End Register4. CR02Horizontal Blanking Start Register 5. CR03Horizontal Blanking End Register Bit Amount of Delay6. CR04Horizontal Sync Start 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 CR145 CR173 Address Incrementing Interval CR146 CR176 Addressing Mode22. CR14Underline Location Register Count By 24. CR16Vertical Blanking End Register 23. CR15Vertical Blanking Start Register Word Mode or Byte Mode 25. CR17CRT Mode ControlCR146 CR176 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 34. CR39Extended Horizontal Blank Time Register 33. CR35 Extended Horizontal Total Time RegisterExtended Horizontal Total MSB that extends CR00 35. CR40Extended Start Address Register 37. CR42Extended Start Address High Register 36. CR41Extended Offset Register 38. CR70Interlace Control Register Interlace Enable39. CR80I/O Control 41. CR82Blink Rate Control 40. CR81Reserved Reserved Bits and Software Compatibility Programming InterfaceOverview Instruction Transport Overview GC Register ProgrammingGC Instruction Streams Instruction Use Interrupt Ring Instruction Parser Ring Buffer Registers Ring Buffers RB Ring Buffer Initialization Characteristic DescriptionRing Buffer Use Batch Buffer Sequence Batch Buffers Arbitration Rationale Instruction ArbitrationWait Instructions Instruction Arbitration Points Batch Buffer Protected ModeInstruction Arbitration Rules Instruction Parser Instructions Instruction FormatInstructions 3129 2824 210 Bits Client Instruction Graphics Controller Instructions Client DWord Bit Description Instruction Parser InstructionsIntroduction Instruction Descriptions Opcode 02h Opcode 01hReserved MBZ DWord Bit Gfxcmdparserwaitforevent DWord Bits Description Reserved 00000h Opcode 15hDwordlength 00h Flip type 0 Synch flip, 1 Async flip Instruction Target 14hDword Length 00h Opcode 07h Opcode 16h Instruction Target 12h Opcode 08hArbitration ON/OFF Instruction Target 11h Word Bits Description Instruction Target 30h Gfxcmdparserbatchbuffer BLTs To and From Cacheable Memory InstructionsBLT Engine Instructions Setupblt Dword Length 06h Setup Background Color AllSetup Foreground Color SLB & TB only Instruction Target Opcode 00h Raster Operation Instruction Target Opcode 10hDword Length 07h Color Depth Destination X2 Coordinate Ending Right PixelbltInstruction Target Opcode 20h Instruction Target Opcode 21h Instruction Target Opcode 22h TextbltDword Length 04h Immediate Data DWs 2 through Dwordlength DWL TEXTImmediateBLTInstruction Target Opcode 30h Immediate Data DW Solid Pattern Color ColorbltInstruction Target Opcode 40h Dword Length 03h Instruction Target Opcode 41h Patblt Pattern Background Color Mono Pattern Transparency Mode 1 = transparency enabledMonopatblt Instruction Target Opcode 42h 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 Fullblt Destination Transparency Mode See BR00 definitionInstruction Target Opcode 45h 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 Primitive Winding Order Rendering Engine InstructionsGfxprimitive Axis Aligned Rectangles Bias Position MaskPrimitive Rendering Instruction Format Vertex Attribute Comments Variable Length Vertex Formats for Rendering Instructions Gfxvertex Gfxrenderstatevertexformat Block Pattern Format GfxblockRendering Block 1Eh Block Type Vertical Motion Vector Precision 00 = 1/2 pixel DWord BitsPrediction Type 212 Motion Vector Format Non-pipelined State VariablesPrecision Format Range Gfxrenderstatemaptexels Gfxrenderstatemapcoordsets Normalized Coordinate Set Update Coordinate Set Index The valid range isNormalized Coordinate Set Mask 0 = Do not update 1 = Update Opcode 1h Gfxrenderstatemapinfo Walk Discrete Integrated Base Utilize Fence Tiled Surface Surface Format 3DstateMW 1DhDwordlength 2h Reserved 0h 1511 Color Space Conversion Enable 221 Gfxrenderstatemapfilter Opcode 2h Reserved 00h Mip Mode Filter Valid values are Opcode 3h Gfxrenderstatemaplodlimits Gfxrenderstatemaplodcontrol Texture LOD Dither Weight Mask 0 = Do not update 1 = UpdateOpcode 4h 3DStateMWNPNon-pipelined 1Dh GfxrenderstatemappaletteloadOpcode 82h Blend Equation Description Gfxrenderstatemapcolorblendstages Replicate Arg1 Alpha to Color Channels Update Blending Stage Index The valid range is3DState24 00h Write result to Current Register or Accumulator Select Invert Color Arg2 Gfxrenderstatemapalphablendstages Invert Alpha Arg1 3DState24 01hInvert Alpha Arg2 Instruction 1h Gfxrenderstatecolorfactor Gfxrenderstatecolorchromakey Kill Pixel Mode Instruction 2h KeyedPixelControl Write Mask 0 = Do not update 1 = UpdateKeyedPixelControl No Specular GfxrenderstatesrcdstblendmonoMonochrome Specular Full Color RGB 236 Opcode Source / Destination Blend State Gfxrenderstatezbiasalphafuncref Alpha Reference State Mask 1 = Update 0 = Do Not Update3DState24NP Non-pipelined 14h Gfxrenderstatelinewidthcullshade Mode 2824 3DState24 02h Alpha Shade Mode State Mask 1 = Update 0 = Do Not UpdateSpecular Shade Mode State Mask 1 = Update 0 = Do Not Update Color Shade Mode State Mask 1 = Update 0 = Do Not Update GFXRENDERSTATEBOOLEANENA1 Alpha Setup Enable Enable Mask 1 = Update 0 = Do Not UpdateColor Index Key Enable Mask 1 = Update 0 = Do Not Update Specular Enable State Mask 1 = Update 0 = Do Not Update GFXRENDERSTATEBOOLEANENA2 Specular Dither Enable Mask 1 = Update 0 = Do Not UpdateFrame Buffer Write Enable Mask 1 = Update 0 = Do Not Update Buffer Write Enable Mask 1 = Update 0 = Do Not Update Gfxrenderstatedrawingrectangleinfo Gfxrenderstatefogcolor3DState24NP Non-pipelined 15h Opcode 80h 3DStateMWNP Non-pipelined 1Dh Opcode 10h GfxrenderstatescissorenableScissor Rectangle Enable Mask 1 = Update 0 = Do Not Update 3DState16NP Non-pipelined 1Ch Opcode 81h Gfxrenderstatescissorrectangleinfo Opcode 83h Stipple PatternStipple Pattern 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 Post Divisor Select LCD Clock DCLK0DS-Display & LCD Clock Divisor Select RegisterReserved VCO Loop Divide 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 Format Alignment Memory Offset RegistersOverlay Buffer Pointer Registers OBUF0Y-Overlay Buffer 0 Y Pointer Register OBUF0U-Overlay Buffer 0 U Pointer Register OBUF1Y-Overlay Buffer 1 Y Pointer Register OBUF1U-Overlay Buffer 1 U Pointer Register OBUF0V-Overlay Buffer 0 V Pointer RegisterBit Descriptiont OBUF1V-Overlay Buffer 1 V Pointer Register Overlay Stride Registers15.4.2.1. OV0STRIDE-Overlay 0 Stride Register YRGBVPH-Y/RGB Vertical Phase Register Overlay Initial Phase Registers HORZPH-Horizontal Phase Register UVVPH-UV Vertical Phase Register INITPH-Initial Phase Register DWINPOS-Destination Window Position Register Overlay Destination Window Position/Size RegistersDWINSZ-Destination Window Size 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 15.4.7.1. OV0CLRC0-Overlay 0 Color Correction 0 Register Overlay Color Correction Registers15.4.7.2. OV0CLRC1-Overlay 0 Color Correction 1 Register DCLRKV-Destination Color Key Value Register Overlay Destination Color Key Registers Always Constant Alpha Blend Enable Destination Constant Alpha Blend EnableDCLRKM-Destination Color Key Mask Register 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 Source Format Manual flip commandAutomatic flipping 297 AWINPOS-Alpha Blend Window Position Register Overlay Alpha Blend Window Position/Size Registers AWINSZ-Alpha Blend Window Size Register Overlay Flip Instruction 300 Instruction Control Registers Instruction, Memory, and Interrupt Control RegistersFENCE-Graphics Memory Fence Table Registers Fence Pitch Reserved for address bits 31 downtoTile walk Fence size Normal Invalidation Mechanism PGTBLCTL-Page Table Control Register PGTBLER-Page Table Error Register Error Type PGTBLERRMSK-Page Table Error Mask Register Display Page Table Error Mask Buffer Unit Page Table Error MaskCommand Streamer DMA Page Table Error Mask Overlay 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 DMAFADD-DMA Engine Fetch Address debug ABBEND-Active Batch Buffer End Address Register debugCurrent DMA Address Reserved User of the DMA Engine Instruction Fifo Debug Mode MEMMODE-Memory Interface Mode Register debugReserved Host Graphics Prefetch Mode Graphics Address Translation 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 LCDTVC-LCD/TV-Out Control Register LCD / TV-Out EnableSync Polarity Control Fphsync Control FP Vesa VGA ModeFP / 740 Data Ordering Fpvsync Control Active Data Polarity Border EnableFphsync Output Control Active Data Order BCLRPAT- Border Color Pattern Register OVRACT-Overlay Active Register DRT-DRAM Row Type Local Memory Interface Bit RAS# act. To precharge t RAS Refresh to RAS# act. t RC Reserved Paging Mode Control PMCBit RAS#-to-CAS# delay t RCD DRAMCL-DRAM Control Low DRAMCH-DRAM Control High 346 HVSYNC-HSYNC/VSYNC Control Register 19. I/O Control RegistersHSYNC/VSYNC Control1916 GPIOAGeneral Purpose I/O Control Register a Gpio Registers Value .bit GPIOBGeneral Purpose I/O Control Register B 351 352 DISPSL-Display Scan Line Count Display And Cursor RegistersLine Counter for Display Inclusive / Exclusive DISPSLC-Display Scan Line Count Range Compare Pixel Pipeline Control PIXCONF-Pixel Pipeline ConfigurationReserved Display path Graphics Gamma Enable. See note Overlay path Gamma Enable. See note CRT Overscan Color Display Color ModeBit DAC Enable Enable Extended Status Read Mode SWF13-Software Flag Registers GUI ModeTransition from VGA modes to hires mode or opposite BLTCNTL-BLT Control DPLYBASE-Display Base Address Register DPLYSTAS-Display Status Select Register Reserved Flat Panel Hot Plug Detect EnableVertical Sync Status Enable Display Line Compare Enable Vertical Sync Status Vertical Blank EnableOverlay Registers Upated Enable Overlay Registers Updated Status CURCNTR-Cursor Control Register Hardware CursorReserved Cursor Coordinate System Origin Select 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