Compaq Super VGA chips. There are 3 "Families" of Compaq VGA chips: Integrated Video Graphics System (IVGS): Supports 640x480x16c. BitBLT functions Advanced VGA System (AVGA): Supports 800x600x16c and 640x480x256c. BitBLT functions. QVision: Supports 1024x768x256c. Newer versions support 1280x1024 and/or TrueColor. Hardware Cursor, BitBLT. 3CEh index 0Bh (R/W): bit 1 If set the ROM is 16bit wide, 8 if clear 2 If set video memory is 16bit wide, 8 if clear 3CEh index 0Ch (R/W): bit 3-7 Version. 03h: IVGS 05h: AVGA 06h: QVision 1024 0Eh: QVision 1280 or 1024 10h: Advanced VGA Port 3CEh index 0Fh (R/W): Environment Register bit 0-3 writing 5 to this register unlocks the extended registers. 4-7 0Ah if in AVGA mode, 0 if in QVision mode Note: The QVision has a specific mode for AVGA support (Mode 29h and 2Eh), where the AVGA accelerator function and registers are used. 3CEh index 10h (R/W): BLTConf bit 2 If set the 2xxxh-3xxxh register block is mapped at 4xxxh-5xxxh 3-4 Video interrupt. 0= Active Low, 1,3=Active High, 2=Disabled. 5 Tri-state if set 3CEh index 40h (R/W): Control Register 0 bit 0 If set accesses to the upper bank (0A8000h-0AFFFFh) are calculated from 0A8000h (I.e.. to create a 64K unified window index 46h should be programmed with a value 8 larger than index 45h). If clear accesses are relative to 0A0000h (I.e.. use same value in index 45h and 46h). 3CEh index 42h (R/W): bit 0 Bit 8 of the Display Offset (3d4h index 13h) 2-3 Display start offset bit 16-17. 7 Set in 1280x1024 modes ?? 3CEh index 43h (R/W): 3CEh index 45h (R/W): Page Register 0 bit 0-7 Bank number in 4KB blocks for accesses to A000h-A7FFh. Note: In the QVision 1280 the bank can be in units of 16KB 3CEh index 46h (R/W): Page Register 1 bit 0-7 Bank number in 4KB units for accesses to A800h-AFFFh If index 40h bit 0 is set this value must be 8 larger than the value in index 45h (8*4k = 32k) to provide a 64k unified window. If index 40h bit 0 is clear this value should be the same as in index 45h. 3CEh index 48h (R/W): bit 0-3 High Area Memory (0=disabled, 1-0Eh = the 1MB boundary the HMA starts at). The HMA is a 1MB continuos mapping of the video buffer. 0-7 Lower 8 bits of the HMA start address 3CEh index 49h (R/W): bit 0-7 Upper 8 bits of the HMA start address 3CEh index 50h bit 3-6 Monitor (0,2,6??) 00h Compaq Internal Monitor 02h Compaq 16" Advanced Graphics Color Monitor 03h Compaq 1024 Color Monitor 04h QVision 200 (20") Color Monitor 05h Compaq SVGA Color Monitor 06h QVision 150 (15") Color Monitor or Compaq 151 FS Color Monitor 0Eh Compaq 14" VGA Monitor (31.5 kHz) 3CEh index 51h (R/W): 3CEh index 54h (R/W): (QVision only) bit 0-7 Video Memory. 2: 512k, 4: 1024k, 8: 2048k Note: For the QVision 1024, 0 apparently means 1024KB. 3CEh index 56h (R/W): (QVision only) bit 2 (R) Set for QVision 1280, clear for QVision 1024 3CEh index 5Ah (R/W): (QVision only) bit 0-5 1 for copy, 2 for fill 6-7 Set to 3 or 0 ?? 3CEh index 80h (R/W): bit 2-3 2=Plasma system. 4-6 Palette option: 1=Standard palette, 2=Option B, 5=option A, 6=option C. 3CEh index 81h (R/W): bit 2 Set for Palette option A-C and Standard palette, clear for option D. 13C7h (R/W): bit 0-7 Data port for the Hardware Cursor map. There are 2 128byte (32x32 bit) maps. Set 3C8h to 0 and then write the 128 byte cursor bitmap to this register to load the actual icon. . Set 3C8h to 80h and write the 128 byte cursor mask to this register to mask any areas not included in the cursor. 13C8h (R/W) bit 0-7 60h=4bit packed, 40h=8bit packed, 10h=24bit packed, 30h=15bit, 38h=16bit 13C9h (R/W): bit 0-1 Set to 2 to enable the Hardware cursor, 0 to disable ??. 2-7 Always 8 ??? 23C0h W(R/W): Source Address (IVGS, AVGA only) bit 0-15 Address of source in DWORDs (256colors) or bytes (16colors). (AVGA) Bit 16-17 are in 23C4h. The exact address and size of the BitBLT can be adjusted by 33C0h,33C1h,33C8h and 33C9h 23C2h (R/W): Width of area (IVGS, AVGA only) bit 0-7 Width in DWORDs of the Blit area. 23C2h W(R/W): Width of BitBLT operation (QVision only) bit 0-9 Width of the BitBLT area in pixels 23C4h W(R/W): Height of the BitBLT area bit 0-9 Number of lines in Blit area. 10-11 (AVGA) Bit 8-9 of the Scanline Width. Bit 0-15 are in 12-13 (AVGA) Bit 16-17 of the distance. Bit 0-15 are in 23CCh. 14-15 (AVGA) Bit 16-17 of Source address. Bit 0-15 are in 23C0h. 23CAh W(R/W): Scanline width. (IVGS, AVGA only) bit 0-15 Width of destination in DWORDs (256color) or bytes (16color). Negative if moving backwards. 23CCh W(R/W): Destination Address (IVGS, AVGA only) bit 0-15 Distance between the Destination and the Source Address in DWORDs (256colors) or bytes (16colors). (AVGA) Bit 16-17 are in 23C4h bit 12-13. 23CEh W(R/W): Scanline width. (IVGS, AVGA only) bit 0-15 Width of destination in DWORDs. Negative if moving backwards. Note: one must be source and the other destination width 33C0h (R/W): (IVGS, AVGA only) bit 0-7 Start pixel of BitBLT source 33C1h (R/W): (IVGS, AVGA only) bit 0-7 Ending pixel of BitBLT destination 33C7h (R/W): (IVGS, AVGA only) 33C8h (R/W): (IVGS, AVGA only) bit 0-1 Note: this is the same registers as 3CEh index 3 ?? 33C9h (R/W): (IVGS, AVGA only) 33CAh W(R/W): Fore/Back ground color ? 33CCh W(R/W): Fore/Background color Note: Apparently the Fore/Background color registers must be written twice to work properly. 33CEh (R/W): COP Status/Command bit 0 (R) If set the CoProcessor is busy. 0-5 (W) 11h = Copy. 9 = Fill. 6 (W) Copy/Fill backwards if set 33CFh (R/W): 63C0h W(R/W): Source Bitmap X-address (QVision only) bit 0-9 The X co-ordinate of the start of the Source Data. 63C2h W(R/W): Source Bitmap Y-address (QVision only) bit 0-9 The Y co-ordinate of the start of the Source Data. 63CAh (R/W): bit 0-2 1=4bit packed, 3=8bit packed, 5= 15bit, 7=24 bit (packed as RGBa) 6 After loading the BitMap Address and Size registers, wait for this bit to be 0 before setting final registers and starting the command. 7 Wait for this bit to be 0, before loading the Source/Destination address and BitMap size registers. 63CCh W(R/W): Destination Bitmap X-address (QVision only) bit 0-9 The X co-ordinate of the start of the Destination Data 63CEh W(R/W): Destination Bitmap Y-address (QVision only) bit 0-9 The Y co-ordinate of the start of the Destination Data 83C6h (R/W): bit 1 If set the DAC is 8bit, if clear 6bit. 83C8h 93C6h W(R/W): Hardware Cursor Y-position bit 0-9 The X-position of the right pixel of the hardware cursor. 93C8h W(R/W): Hardware Cursor X-position bit 0-9 The Y-position of the lower scanline of the hardware cursor. Note: Registers 3C6h-3C9h, 13C6h-13C9h, 83C6h-83C9h and 93C6h-93C9h are physically in the Brooktree DAC. ID Compaq super VGA: old:=rdinx($3CE,$F); wrinx($3CE,$F,0); if not testinx($3CE,$45) then begin wrinx($3CE,$F,5); if testinx($3CE,$45) then begin SubVers:=rdinx($3CE,$C) shr 3; case SubVers of 3:name:='Compaq IVGS'; 5:name:='Compaq AVGA'; 6:name:='Compaq QVision 1024'; $E:if (rdinx(GRC,$56) and 4)>0 then name:='Compaq QVision 1280' else name:='Compaq QVision 1024'; $10:name:='Compaq AVPort'; else UNK(Compaq) end; end; end; wrinx($3CE,$F,old); Video Modes: 22h T 132x 43 23h T 132x 25 27h T 132x 50 28h T 132x 60 29h G 800x 600 16c PL4 2Eh G 640x 480 256c P8. Each scan line is 1024 bytes wide. 32h G 640x 480 256c P8 Each scan line is 1024 bytes wide 33h G 640x 400 256c P8 Each scan line is 1024 bytes wide 34h G 800x 600 256c P8 Each scan line is 1024 bytes wide 37h G 1024x 768 16c P4 38h G 1024x 768 256c P8 39h G 1280x1024 16c P4 3Ah G 1280x1024 256c P8 Each scan line is 2048 bytes wide 3Eh G 640x 480 32k P15 40h G 640 400 2 Compaq Portable only 4Dh G 512x 480 16m P32 Four bytes per pixel 4Eh G 640x 400 16m P32 Four bytes per pixel BitBLTs: There appear to be two different systems: mode 2Eh uses a system based on the memory address of the bitmaps involved, and with some fields packed. Is this to keep compatibility with something ?? Mode 32h, 37h and 38h use a system based on the pixel addresses of the bitmaps Also some of the registers appear to be mapped to more than one address ?? I.e.. drivers some time adds a value to the register address. Compaq BIOS extensions: ----------10BF00----------------------------- INT 10 - VIDEO - Compaq Portable Extensions - SELECT EXTERNAL MONITOR AX = BF00h Note: all registers preserved and the internal monitor is blanked the external monitor becomes the active monitor ----------10BF01----------------------------- INT 10 - VIDEO - Compaq Portable Extensions - SELECT INTERNAL MONITOR AX = BF01h Note: all registers preserved and the external monitor is blanked the internal monitor becomes the active monitor ----------10BF02----------------------------- INT 10 - VIDEO - Compaq Portable Extensions - SET MASTER MODE OF CURRENT CTRLR AX = BF02h BH = master mode 04h CGA 05h EGA 07h MDA ----------10BF03BX0000----------------------- INT 10 - VIDEO - Compaq Portable/Systempro Extensions - GET ENVIRONMENT AX = BF03h BX = 0000h Return: BH = active monitor 00h = external 01h = internal BL = master mode 00h = switchable VDU not present 04h = CGA 05h = EGA 07h = MDA 08h = switchable LCD controller present CH = 00h (reserved) CL = switchable VDU mode supported bit 0 = CGA supported bits 1,2 = reserved (1) bit 3 = MDA supported bits 4-7 = reserved (1) DH = internal monitor type 00h = none 01h = Dual-mode monitor 02h = 5153 RGB monitor 03h = Compaq Color monitor 04h = 640x400 flat panel 07h = LCD VGA DL = external monitor type 00h = none 01h = dual-mode monitor 02h = 5153 RGB monitor 03h = Compaq Color monitor 04h = 640x400 flat panel 05h = VGC monochrome 06h = VGC color ----------10BF04----------------------------- INT 10 - VIDEO - Compaq Portable Extensions - SET MODE SWITCH DELAY AX = BF04h BH = new state of delay 00h enabled 01h disabled ----------10BF05----------------------------- INT 10 - VIDEO - Compaq Systempro Extensions - ENABLE/DISABLE DISPLAY AX = BF05h BH = new state of video 00h off 01h on ----------10BF06----------------------------- INT 10 - VIDEO - Compaq SLT/286 - READ GRAY SCALE TABLE AX = BF06h CL = address to be read from grey scale table Return: AL = bit 3-0 - Value read from grey scale table CL = address to be read from grey scale table ----------10BF07----------------------------- INT 10 - VIDEO - Compaq SLT/286 - WRITE GRAY SCALE TABLE AX = BF07h CH = value to write to grey scale table CL = address to be written to grey scale table ----------10BF08----------------------------- INT 10 - VIDEO - Compaq SLT/286 - WRITE COLOR MIX REGISTERS AX = BF08h CH = bits 7-4 - Green weight bits 3-0 - Blue weight CL = bits 7-4 - unused bits 3-0 - Red weight --------b-10BF09----------------------------- INT 10 - VIDEO - Compaq LTE Lite - ENABLE ??? AX = BF09h Return: CF clear Note: sets bit 6 of port 03CEh index 81h; in some cases also sets index 84h to 6Fh and index 83h to 04h --------b-10BF0A----------------------------- INT 10 - VIDEO - Compaq LTE Lite - DISABLE ??? AX = BF0Ah Return: CF clear Note: clears bit 6 of port 03CEh index 81h; in some cases also sets index 84h to 80h and index 83h to FBh --------b-10BF0B----------------------------- INT 10 - VIDEO - Compaq LTE Lite - CHECK WHETHER ??? ENABLED AX = BF0Bh Return: CF clear AX = state (0000h disabled, 0001h enabled) ----------10BF0C------------------------------------ INT 10 - VIDEO - Compaq QVision - AX = BF0Ch Clears I/O port 83C6h bit 1. Select 6bit DAC ----------10BF0D------------------------------------ INT 10 - VIDEO - Compaq QVision AX = BF0Dh Sets I/O port 83C6h bit 1. Selects 8bit DAC ----------10BF0E------------------------------------ INT 10 - VIDEO - Compaq QVision - AX = BF0Eh Return: AL = 00h if 6bit DAC 01h if 8bit DAC ----------10BF0F------------------------------------ INT 10 - VIDEO - Compaq QVision - AX = BF0Fh BX = HMA start address or 0FFFFh Return: AX = HMA start address ----------10BF10------------------------------------ INT 10 - VIDEO - Compaq QVision - AX = BF10h Return: AX = HMA start address in ?? ----------10BF11------------------------------------ INT 10 - VIDEO - Compaq QVision - AX = BF11h Return: AL = BFh ES:SI -> ES:DI -> COMPAQ text and date ----------10BFE0------------------------------------ INT 10 - VIDEO - Compaq QVision (later models ??) AX = BFE0h