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Title: Programming/Drivers - VGAdoc Programming information for every RAMDAC, EGA, VGA, SVGA, and VESA video card made up to 1995.
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VGADOC & WHATVGA Homepage

Last Revised 3/Aug/2000You are user # to access this page since 2/Dec/1998Note: These pages are also located at http://www.datashopper.dk/~finth/ (at least until the end of '99)

Contents

What's VGADOC and WHATVGA ? Notes on VGADOC4bDrivers (No I don't have them but here are a few pointers)WANTED Documentation and hardware WANTEDNew BETA New BETA of WHATVGA v2.40 (feb/99)PCI Vendor IDsPCI IDs (>400Kbytes)DDC Monitor IDsAdapters chipsets Which chipset is on what card ?Latest version

What's VGADOC and WHATVGA ?

VGADOCVGADOC is a collection of programming information for various (S)VGA and other video adapters.Currently consists of over 1200Kb text in 55 files describing chipsets (8514/A, Acer, Ahead, Alliance,Appian, ARK Logic, Avance Logic, ATI, CGA, Chips & Technologies, Cirrus Logic, Compaq, EGA, Everex,Genoa, Hercules, Hualon, IIT, #9 Imagine 128, Matrox, Mediavision, MXIC, NCR, Oak, Paradise, PCjr,Primus, Realtek, S3, Sierra, SiS, Trident, Tseng, UMC, Weitek, Video7, XGA, Yamaha plus Clock chips,RamDACs and some framegrabbers), software interfaces (VGA BIOS, VESA VBE, AI) and others (PCI bus,connectors, vendor lists, adapters and monitors)WHATVGAWHATVGA is the test program distributed with VGADOC. Currently covers more than 40 chip families,over 200 chip versions and more than 700 video modes.WHATVGA attempts to detect the type of video adapter(s) installed, the amount of video memory, and thetype of RamDAC and clock chip (if any).For each chipset the known video modes are listed and can be tested. Tests include drawing in videomemory, scrolling the image, BitBLT, Linedraw, Hardware Cursor and DAC specific tests. Of course notall chipsets supports all tests, in fact a few only supports detection.

Notes on VGADOC4b

This is the stuff that should have been in VGADOC4b :-)All line numbers refer to the unmodified source files from VGADOC4b.Compiling WHATVGA. The primary source file is WHATVGA.PAS.For Turbo Pascal 5.5 and 7.0 use: TPC -b WHATVGA, for Borland Pascal 7.0 use: BPC -b -$Y- WHATVGA.From the IDE select WHATVGA as the primary file (Compile - Primary) and then Build the project (Compile - Build).For Borland Pascal 7.0 you may have to disable Local Symbols (Options - Compiler - y (off)).WHATVGA can not be compiled from the TP 5.5 IDE due to the 64K file limit in the editor.Chip identification. The chip identification samples in the .txt files were not updated in all cases. You may want to compare with the actual rutines in IDVGA.PAS.Register and Mode Analysis. Due to a last minute "fix" the mode analysis option always works on theregisters for a 80x50 text mode (typically mode 3 changed to 50 lines).To solve it remove line 1356 in SUPERVGA.PAS (the "if setmode(3,false) then;" line in the SetTextMode procedure).Tseng BitBLT & line draw. Early Tseng ET4000/W32i and p models need "repeat until (mem[cv.Xseg:$7F36] and 2)=0" inserted after lines 1279, 1585 and 1842 of BITBLT.PAS (I.e. at the start of the Tseng sections of the FILLRECT, COPYRECT and LINE rutines) to ensure that the blitter is idle before we start the next operation. BitBLT should use a 4x1 pattern for the W32p and a 4x2 pattern for the W32 and W32i (4x1 won't work on these) to fix the "dotted line" problem. There are some changes to the linedraw rutine, see the betaGenoa 6400. Line 905 of SUPERVGA.PAS (the "setinx(SEQ,8,$40); {Ext Addressing}" line in the SetMode procedure) should be removed as it is not needed and causes problems with some modes. Also lines 1234-1236 of IDVGA.PAS (the "if (rgs.crtcregs.x[$2F] and 1)>0 then ilace:=true; if (rgs.crtcregs.x[$2F] and 2)>0 then wordadr:=16; if (rgs.seqregs.x[4] and 8)>0 then pixwid:=4;" lines in the CalcRegisters procedure) should be changed to: if (rgs.crtcregs.x[$2F] and 2)>0 then wordadr:=16 else if memmode>=_P8 then vclkdiv:=vclkdiv*2; if (rgs.crtcregs.x[$2F] and 1)>0 then begin ..ilace:=true; ..wordadr:=wordadr shr 1; {Ie. for 2 scanlines, half each} end; if (rgs.seqregs.x[4] and 8)>0 then pixwid:=4; if (rgs.seqregs.x[9] and $20)>0 then pixwid:=pixwid*2;S3 with IBM dac. WHATVGA has problems with S3 cards with the IBM RGBxxx randacs due to a conflict between IBM dacs and the manipulation of 3d4h index 5Ch bit 5 used for the S3/TI TVP dac combo test. Depending on make, model and luck this can cause instability or hung systems. The fix is to test for IBM dacs before the TVP dac tests.ATI Mach 264CT. The ATI Mach64 264CT (and probably ET/VT) differs significantly from the Mach64 CX/GX. WHATVGA v2.0 would lockup during detection. I have fixes forSierra SC15064. WHATVGA v2.00 doesn't work with the Sierra SC15064. I am currently working on this and should have a working version soon.PCI bus. I've seen lockups during PCI detection with some combinations of motherboard chipsets and video chipsets. One such case is the UMC UM8881/6 mb chipset and Tseng ET4000/W32p rev C. The solution appears to be to only read the first 48 (or 64 ?) bus/device combinations (rather than 128 as in WHATVGA v2.00 or 512 as possible) for PCI Type 1 chipsets.Runtime Error 200. Recent fast systems (typically from PII 300Mhz and up) cause a "Runtime Error 200" when starting WHATVGA (and all other TP/BP programs using the CRT unit). This is caused by an overflow when initialising the system CRT unit. While Inprise/Borland has not provided an official fix, there are several utilities to patch the TP7/BP7 libraries around.

Latest version

The current version of VGADOC is VGADOC4b.ZIP released 4/Oct/95 (contains VGADOC v4 and WHATVGA v2.0) and is available at Garbo and Simtel (and mirrors).Due to a packaging error a VGADOC4.ZIP was initially created. This had a file (VGADECL.INC)missing and has been replaced by VGADOC4b.ZIP. If you should find VGADOC4 just ignore it and look aroundagain, VGADOC4b should be close by.VGADOC4b.ZIP is available from (among others):garbo.uwasa.fi (Finland)SimTel (US)sunsite.doc.ic.ac.uk (UK)ftp.datashopper.dk (DK)Click
 

Programming

information

for

every

RAMDAC,

EGA,

VGA,

SVGA,

and

VESA

video

card

made

up

to

1995.

http://home.worldonline.dk/finth/

VGAdoc 2008 October

dvd rental

dvd


Programming information for every RAMDAC, EGA, VGA, SVGA, and VESA video card made up to 1995.

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