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-
- The Universal VESA VBE
- ----------------------
-
- Copyright (C) 1993 SciTech Software
- All rights reserved.
-
- What is it?
- -----------
-
- The Universal VESA VBE is a small Terminate and Stay Resident (TSR) program
- that extends the video BIOS of SuperVGA video cards to make them compatible
- with the Video Electonics Standards Association (VESA) recommended
- Video BIOS Extensions (VBE).
-
- By having a video card that has a VESA VBE compatible BIOS, or by
- installing this small TSR, programs that support the VESA VBE programming
- interface will work correctly for your SuperVGA. This helps to solve a
- lot of problems with compatability between different SuperVGA cards on the
- market. Note that this program will not take advantage of any of the
- acceleration features that your video card may provide.
-
- Why use it?
- -----------
-
- You may already have a VESA VBE TSR for you video card, or you video card
- may have a VESA VBE compatible BIOS already, so why would you want to use
- this program?
-
- The simple answer is that most of the TSR's that exist today, and a lot
- of the not-so-new SuperVGA cards that are around implement an older version
- of the VESA VBE programming interface (if any at all). For this reason, some
- programs that use the advanced features of the new VESA VBE standard will
- not work with the TSR or BIOS that you currently have.
-
- So what advanced features does this TSR provide that other's don't? The
- Universal VESA VBE implements the VESA VBE 1.2 programming interface,
- which supports the following features:
-
- . SuperVGA page flipping. High performance animation programs can
- use your card to full potential using the VESA BIOS to implement
- extended page flipping (imagine, 1024x768x16 double buffered
- animation, or even 800x600x256 and 640x400x32k/64k on a 1Mb video
- card!!).
-
- . SuperVGA virtual screens. Programs may set up a virtual display
- resolution of say 1024x1024 pixels, and smoothly scroll a window
- with less physical resolution around within this buffer.
-
- . Support for the 32k, 64k and 16 million color video modes. As well
- as supporting the industry standard 16 and 256 color video
- modes.
-
- . Speed. The bank switching code in this package tends to run faster
- than the routines embedded in the VIDEO BIOS of some video cards.
-
- . Programs that know about the Universal VESA VBE protected mode
- extensions can use the high performance protected mode programming
- interface provided by this TSR.
-
- . Extremely small size. When the TSR is resident in your computer it
- only requires about 3k of memory which is smaller than the
- size of most commerical VESA VBE TSR's. It may also be loaded high
- to save even more memory.
-
- Hardware Requirements
- ---------------------
-
- The Universal VESA VBE will run on any 80x86 based IBM PC compatible
- running MSDOS. Currently the Universal VESA VBE supports the following
- SuperVGA cards (note that not all of these have been fully tested):
-
- - ATI Technologies 18800, 28800
- - Ahead A & B
- - Chips & Technologies 82c451/452/453
- - Everex
- - Genoa Systems GVGA
- - OAK Technologies OTI-037C, OTI-067, OTI-077, OTI-087
- - Paradise PVGA1A, WD90C00/10/11/20/21/30/31
- - NCR 77C20/21/22E
- - Trident 88/8900
- - Video7 V7VGA versions 1-5
- - Tseng Labs ET3000, ET4000, ET4000/W32
- - AcuMos AVGA2
- - S3 86c911/924/801/805/928
- - Advance Logic AL2101 SuperVGA
- - MXIC 86010 SuperVGA
- - Primus 2000 SuperVGA
- - RealTek 3106 SuperVGA
- - Cirrus Logic CL-GD 5420, 5422, 5424, 5426, 5428
-
- How do I install it?
- --------------------
-
- You can install the TSR from the command line, or from your autoexec.bat
- file. Don't worry about installing it twice, it will automatically detect
- if you have already installed it.
-
- To install it simply type:
-
- univbe
-
- from the command line. It will determine what type of SuperVGA card you
- have installed and install itself accordingly. If you wish to remove the
- TSR from memory after it has been installed, simply type:
-
- univbe -u
-
- This will remove the program from memory, even if it was not the last
- TSR to be installed. However if you installed another TSR after this
- one that has hooked into the Int 10h interface the old TSR will cease
- to function.
-
- You may also use command line options to modify the the installation
- process used by the program. The following is produced by typing
- 'univesa -h' at the command line:
-
- Options are:
- -s<name> - Force detection of SuperVGA 'name'
- -c<x> - Force detection of SuperVGA chipset (numerical id)
- -m<size> - Force memory size to 'size'
- -d<x> - Force DAC type (0:VGA, 1:15 bit, 2:16 bit, 3:24 bit)
- -i - Do not perform SuperVGA detection
- -q - Quiet mode
- -g - Regenerate default .ini file
- -u - Unload the Universal VESA VBE from memory
- -t - Don't go TSR, just return the detected SuperVGA id
- -b - Swap the RED and BLUE bytes in 24 bit modes.
-
- It is possible the SuperVGA detection code will hang the machine on old
- VGA/SVGA cards. You can optionally force the program to work with any
- combination of card, chipset, memory size and DAC, but unless you specify
- the -i option, unspecified values will be filled in automatically for you.
-
- Thus you if the detection code did not correctly identify you video card
- configuration, you can force the TSR to work with the correct values.
-
- For some SuperVGA cards, I have not been able to work out a solid method
- of detecting the amount of video memory on board. If this is the case,
- the Universal VESA VBE will refuse to install itself and ask that you
- specify the amount of video memory on your card from the command line.
-
- The Universal VESA VBE does not provide support for any of the extended
- text modes that your video card may provide, but will provide support
- for any extended text modes supported by an underlying VESA VBE compliant
- BIOS. Thus if you video card already has a VBE BIOS or you install
- your favorite VESA VBE TSR for your video card _before_ installing the
- Universal VESA VBE, the Universal VESA VBE will use a pass-through
- mechanism to ensure the extended text modes still work correctly.
-
- What's the .ini file for?
- -------------------------
-
- For most installations, the Universal VESA VBE will automatically
- determine the video modes that you card supports. However on some older
- video cards some video modes that the Universal VESA VBE thinks are
- available aren't and so an error will occur if a program tries to set
- the video mode. The .ini file is used to remove support for those video
- modes. You can edit the .ini file yourself or you can get the TSR
- to automatically generate the default .ini file for you.
-
- In order to generate the default .ini file for you, you must remove the
- TSR from memory, delete the old .ini file, re-install the TSR in memory
- and run the program with the -g option. The default .ini file is now
- generated. You should then remove the TSR again and re-install it using
- the values in the new .ini file. A batch file called 'makeini.bat'
- is provided which will do this for you.
-
- The format of the .ini file is simple. All the video modes removed by
- the program are listed under the section '[remove]' in the .ini file.
- They are listed as the hexadecimal internal mode numbers used by the
- TSR (see the next section for a list of the mode numbers used). An
- example .ini file might be:
-
- [remove]
-
- 10D
-
- Video modes supported by this TSR
- ---------------------------------
-
- The Universal VESA VBE supports the VESA VBE 1.2 programming interface,
- which defines a number of standard video modes numbers. The new version
- of the VESA VBE specs will allow the vendor to extend the video numbers
- used to whatever values they wish, so I have taken the liberty to
- extend the mode numbers used by the Universal VESA VBE to include
- modes not originally specified in the VBE 1.2 specs, but supported by
- a number of popular video cards on the market. Depending on how well
- your applications have been written, they may or may not be able to
- use those modes.
-
- The following is a list of the internal mode numbers used by the Universal
- VESA VBE and a description of each video mode:
-
- 102 - 800x600 16 color
- 104 - 1024x768 16 color
- 106 - 1280x1024 16 color
- 11C - 640x350 256 color
- 100 - 640x400 256 color
- 101 - 640x480 256 color
- 103 - 800x600 256 color
- 105 - 1024x768 256 color
- 107 - 1280x1024 256 color
- 10D - 320x200 32k color
- 11D - 640x350 32k color
- 11E - 640x400 32k color
- 110 - 640x480 32k color
- 113 - 800x600 32k color
- 116 - 1024x768 32k color
- 119 - 1280x1024 32k color
- 10E - 320x200 64k color
- 11F - 640x350 64k color
- 120 - 640x400 64k color
- 111 - 640x480 64k color
- 114 - 800x600 64k color
- 117 - 1024x768 64k color
- 11A - 1280x1024 64k color
- 10F - 320x200 16m color
- 121 - 640x350 16m color
- 122 - 640x400 16m color
- 112 - 640x480 16m color
- 115 - 800x600 16m color
- 118 - 1024x768 16m color
- 11B - 1280x1024 16m color
-
- Problems and known bugs
- -----------------------
-
- The Universal VESA TSR seems to have problems with QEMM, since QEMM does
- something weird with the Video BIOS. In order to fix this problem,
- you should use the QEMM 'exclude' options to exclude the Video BIOS
- area. Do this by including the following in the QEMM options:
-
- EXCLUDE=C000-C1FF
-
- Refer to the BUGS file for a list of known problems with the Universal
- VESA VBE.
-
- Can I get the source code?
- --------------------------
-
- Yes, you can order the full source code for the product from SciTech
- Software. Refer to the files PRODUCTS.DOC and ORDER.DOC for more
- information.
-
-