	      VIBRANT CADKEY 6.0 Driver Documentation
			  February 1993


This document describes how to install and use the Vibrant Graphics CADKEY
protected mode driver.

1) Type the following command from the DOS prompt:

   type a:install

   This will copy all driver files into your CADKEY directory,rename your
   existing GRDEV.DAT file GRDEV.OLD and then copy the Vibrant GRDEV.DAT
   file onto your hard disk. It will also allow you to load the correct
   Vibrant files needed to support the TI 340x0 if you are using a TIGA based
   graphics board or an AG1024 graphics board.

2) Run the CADKEY "config" program
    - select the desired graphics device
    - select the desired graphics mode
    - select option 4 to set the graphics CDE option
	- The default setting is:
	    gr
	  Change the setting to:
	    gr,prck6
    - exit and save the changes

3) Reboot your system if you had previously configured it for another
   driver. Be sure to remove any TSR's from your autoexec.bat
   that load other CADKEY drivers. With a CADKEY CDE, you do not need
   to load a driver, CADKEY will handle all driver requirements.

4) Run CADKEY

ADDITIONAL INFORMATION:

    FONT CONTROL:
	Your Vibrant driver allows you to select fonts from within
	the "application" menu of CADKEY

    ANTI ALIASING CONTROL:
	Your Vibrant driver allows you to toggle anti-aliasing on or
	off from within CADKEY by using the "application" menu.
	Remember, anti-aliasing is only available in 256 color modes
	for 8514, s3 and VGA and SUPER VGA modes. It is not available
	for TIGA, AG1024, or XGA boards at this time.

    We have included the following discussion to help you to better understand
    how your Vibrant CADKEY driver achieves anti aliasing and to describe its
    limitations and the reasons behind those limitations. Anti aliasing
    is accomplished in the driver by using the color palette entries above index 15
    (16-255) to store graduated shades of the primary 16 colors (indices 0-15.)
    The graduated shades of the base palette are computed and loaded automatically
    by the driver after CADKEY communicates the base 16 colors to the driver.
    The driver draws most lines using 2 pixels per line point with each pixel
    pair summing to a full intensity of the base color. In normal lines, all lines
    are drawn using 1 pixel per point in the line, with the single pixel being
    lit at full intensity. By using this graduated palette shading technique, the
    driver is essentially trading off the number of available colors ( 16 from
    256 ) for smooth anti aliased lines. If you try operating the driver in anti
    aliased mode in a 16 color graphics mode, the driver will ignore the anti
    aliasing and just use the 16 colors available for that graphics mode. This is
    done because the driver assumes that the graphics device is only capable of
    16 simultaneous colors when a 16 color mode is selected and 256 simultaneous
    colors are required for the driver to create a correctly graduated palette. See
    the discussion at the top of this document about how to set a graphics mode.


** end of documentation **
