home *** CD-ROM | disk | FTP | other *** search
- TiGA DEVICE DRIVER
- August 30, 1990
-
-
- The TiGA driver will work with any graphics boards which support
- the TiGA (Texas Instruments Graphics Architecture) interface.
- This driver has been developed and tested on the Compaq Advanced
- Graphics Controller, the Hewlett Packard Intelligent Graphics
- Controller, and the Renaissance Rendition II. The driver should
- work at any resolution with either 16 or 256 colors (256 required
- for shading and version 4.10, and highly recommended always).
-
- This is a non-display listing driver which requires no additional
- memory on the graphics card or EMS memory to operate.
-
- This driver requires that your system already have the TiGA
- interface installed, which may include a DEVICE statement in your
- CONFIG.SYS file as well as TIGACD (communication driver) being
- loaded and the TIGA environment variable set. Refer to your
- graphics controller documentation for more information on these
- items.
-
- The TiGA driver downloads to the graphics controller some program
- code contained in the file EXTPRIMS.RLM. This file is provided
- by you graphics board manufacturer, but early versions of this
- file have a bug in the routine which displays 'filled polygons'.
- Therefore if your version of EXTPRIMS.RLM is not newer than that
- one which we have provided (12-04-1989), replace your original
- with our newer version.
-
-
- Selecting the mode:
-
- Most TiGA graphics controllers can run in a number of different
- mode (resolution and number of colors). Generally the
- manufacturer provides a utility program to select the mode, but
- if not the mode number can be entered in the device information
- file (GRAPHICS.DEF) by placing the desired mode number in the
- second number on line 103. The default is "0", which run the
- board in whatever mode it finds it. We have also included a
- utility program "TIGAMODE.EXE" which you can run to select from
- your available modes.
-
-
- Running under GCD or MicroDRAFT revision 3.x or PDFEM:
-
- Before you can start GCD revision 3.0, 3.1 or 3.2 you must first
- install the TiGA Extended Graphics Primitives using the program
- TIGASET (included). If you have not installed the primitives,
- GCD will not start. Also, make sure that the first value on line
- 103 in the device information file (GRAPHICS.DEF) is a "0",indicating that the driver should not try to load the primitives
- itself.
-
- This step is necessary due to the unavailability of memory under
- version 3.x.
-
-
- Running under GCD or MicroDRAFT revision 4.0:
-
- Under 4.0 enough memory is available to allow the driver to load
- the TiGA Extended Graphics Primitives automatically, so TIGASET
- is not needed. Just ensure that the first value on line 103 in
- the device information file is a "1".
-
-
- Running the shading (DISPLAY.EXE):
-
- Any of the various revisions of the DISPLAY command leave enough
- available memory for the driver to load the TiGA Extended
- Graphics Primitives automatically, so again the first value on
- line 103 should be a "1".
-
- The TiGA driver supports 32 shades per color, which produces
- nicer images than most, but you must make sure to delete
- COLOR.FIL from your shade directory (it assumes 16 shade per
- color). If you wish to modify the color definitions do so in the
- device information file, which is the proper place to play with
- colors.
-
- Since shading does not display any text, you can save driver
- initialization time by making sure that you do not have a custom
- text font being loaded (See below).
-
-
- Special features:
-
- TEXTFONTS - This device driver allows you to specify a TiGA
- text font that you would like to use instead of the hardware
- text font (which can be very small at high resolution). We
- have provided a number sample font which you may enable by
- placing the name of the font you wish to use on line 5 in
- the device information file. Make sure that the font file
- resides in a directory specified in CVPATH.
-
- VISUAL BEEP - This device driver allow you to specify the
- tones of the beep you while GCD is running. Further, this
- driver will either beep and blink the current text window,
- or blink and not beep. The tones are set in the device
- information file, as well as the default beep/blink mode.
- The beep/blink mode can be changed on-the-fly by running SETTIGA.UCD.
-
- SAVE & RESTORE SCREEN - This driver save and restore
- standards shading file (*.SHP) which means that any shaded
- image may be displayed while inside of GCD. You may also
- use 4D's Shaded Image printing utilities to print screen
- images created with save screen.
-
- ****************************************************************
- January 29, 1991 UPDATE:
-
- Drivers for both TiGA 1.1 (TIGA11.DEV) and TiGA 2.0 (TIGA20.DEV)
- have now been included. Simply name the appropriate driver
- TIGA.DEV, and install as usual. Use the 2.0 driver if your
- graphics board comes with TiGA 2.0 support. There is no
- appreciable difference between the drivers.
-
- NOTES:
-
- If you are using TiGA 2.0 do not use the EXTPRIMS.RLM file
- supplied with this driver. Use the EXTPRIMS.RLM shipped by
- your graphics board manufacturer.
-
- The Hercules Graphics Station card will work only if you
- purchased the extra 2 MB of memory, and then it still works
- best in a two screen configuration. You may experience
- problems when using single screen and display text on the
- VGA text screen. This board is not recommended for Personal
- Designer.
-
- Problems with disappearing text cursor and flashing text
- characters on the text screen have been fixed in this
- driver.
-
- This driver has been tested on graphics boards from Number
- Nine, Expert Graphics, Rasterex, Compaq, HP, Appian
- Technologies (Renaissance GRX), Vermont Microsystems, and
- NEC.
-
- ****************************************************************
- April 15, 1991 UPDATE:
-
- A bug was fixed which caused the lower portion (1/10 to 1/4) of a
- shaded image to be cut off. This was a timing issue on some
- graphics boards, and does not affect any operations other than
- the display of shaded images.
-
- ****************************************************************
- May 6, 1991 UPDATE:
-
- A bug was fixed which would cause the driver to hang whendisplaying large ICONs (those with a data size greater than 32k).
-
- The text cursors was changed to be transparent to allow it to be
- moved over text with out overwriting the text.
-