Dual Display Graphics Ad. (250-3045)  Software Setup   Faxback Doc. # 2084

Diagnostic Check:

The diskette that was included with your DDGA contains a menu driven 
diagnostic program, DDGATEST.COM, that lets you verify the operation 
of the card. To run the diagnostic program, boot up under MS-DOS and 
place the utility diskette in Drive A.

Type:  ddgatest <ENTER>

The screen shows the following menu:    

Copyright 1985 Tandy Corp.              

1. Test Monochrome Mode              
2. Test Emulation Mode              
3. Test Color Mode              
0. Exit    

Enter Option: ______

Select the number that corresponds to the mode for which you set the DDGA.
For example, if you set the DDGA to run in Color Mode, type 3, press <ENTER>.

A prompt appears asking how many times you wish to run the test. For most
cases once is enough, so simply press <ENTER> for the default.

A menu of available tests for the mode you selected appears. You can either
select individual tests or run all tests. When you finish running the tests, 
type 0 and press <ENTER> to exit to the previous menu until you return to the 
MS-DOS system prompt.

UTILITY DISKETTE

The diskette that came with the DDGA contains a menu driven program, VMODE.COM, 
that allows you to switch between video modes while operating your computer and
without opening you computer case to reset switches. To run VMODE, boot up with
MS-DOS, an put the utility diskette into Drive A. 

Type: vmode  <ENTER>

The screen shows the following menu:    

DDGA Mode Selection Menu                     
Keywords    
1. Monochrome Text 80 x 25                   -  MT    
2. Monochrome Text 132 x 25                  -  M25    
3. Monochrome Text 132 x 44                  -  M44    
4. Monochrome Graphics 1 page                -  MG1    
5. Monochrome Graphics 2 pages               -  MG2    
6. Emulation Text                            -  E80    
7. Color Text 80 x 25                        -  C80    
8. Color Test 132 x 45                       -  C132    
9. Exit to DOS   
10. Monochrome 132 columns screen adjustment   
11. Color 132 columns screen adjustment    

Enter Option:

Select the number that corresponds to the video mode you want. the program
instructs you to connect the new monitor and press any key when ready. Follow
the instructions as they appear on the screen.
If you are switching from a monochrome mode to a color mode, or vice versa,
the program reminds you to check if you have the correct monitor connected to
the DDGA. It is important that you follow the directions carefully. Otherwise,
you could damage your monitor.If you are switching to a 132-column mode and
are planning to run an application program in this mode, you must be sure
that the applications program supports 132-column mode.

NOTE: Before using 132-column display for the first time, be sure to use
Option 10 or 11 to adjust the display. Use the arrow keys as instructed to
center the row of numerals at the top or your screen. When the display is
centered, press . You need not make this adjustment each time you use
VMODE. The preceding procedure creates a .TRP file. Copy the .TRP file onto
any diskette on which you copy VMODE.

Once you become familiar with the Mode Switching program, you can skip the
menu by typing: 

 vmode  <ENTER>

"Keyword" The keyword appears on the menu as shown earlier.

MONOCHROME GRAPHICS NOTE

If you plan to use the DDGA in the Monochrome Mode, you must run the VMODE
program to allocate 1 or 2 pages of memory for graphics. You might wish to
create a file which does this allocation automatically for you each time you
boot. To do so, follow the appropriate instructions below:

WITH A HARD DISK

1. Boot up MS-DOS from the hard disk.
2. Insert the Utility diskette in Drive A.
3. Copy the VMODE program to hard disk by typing: 

   copy a:vmode.* 

WITH ONE FLOPPY DISK DRIVE

1. Boot up MS-DOS from Drive A.
2. Remove the MS-DOS diskette, and insert the Utility diskette
   into the drive.
3. Type the following to copy VMODE to your MS-DOS diskette: 
   
   copy b:vmode.*.

4. Follow the instructions on your screen for swapping diskettes.

WITH TWO FLOPPY DISK DRIVES

1. Boot up MS-DOS from Drive A.
2. Insert the Utility diskette into Drive B.
3. Copy VMODE to your MS-DOS diskette by typing: 

   copy b:vmode.* 

Now create an autoexec.bat file by typing: 

   copy con:autoexec.bat 
   vmode keyword 

Press and  to end the file. Possible keywords are displayed on the
menu as shown earlier.

(smm/jej-05/11/94)