Subject: Problems with VGA

        Fm: GAVIN LENNOX 76535,3062

        I HAVE A 1000TX WITH VGA ALOT OF SOFTWARE WILL NOT 
        RECOGNIZE MY VGA CAN ANYONE HELP??? 


Fm: Tommy Bevins 76510,1526

I had the same problem with my 1000TL.  It seems Tandy has an error in its
BIOS that screws up programs that try to autosense the video mode.  An article
in the magazine One Thousand provided a fix for this.
       
The fix to the problem is to change the value of the byte at 0000:048A
from 3F to the correct value.  The correct values are listed in Table #3.

Until Tandy comes up with a fix to their BIOS, the following program written 
by ATI will solve the problem:
      
Using DEBUG.COM from you Disk Operating System, type the instructions
in Figure #4 to create a short executable file called T1KVGA.COM. Put the
value from Table #3 that matches the set up of your computer in where the "__"
is shown.  For almost all users, the value will be "0B".

Run this program every time you boot the computer and want to use
software that auto-detects your VGA card.

 Table #3: Fix Values
 ---------------------
 Default Video Mode         Value            Meaning
 ---------------------    ---------     --------------------------------
 VGA color                   0B              single VGA color display
 VGA color and MDA           0C              dual monitors with VGA
                                             color and mono text boards
 VGA mono                    0D              single VGA monochrome display
 VGA mono and CGA            0E              dual monitors with VGA mono
                                             and CGA color boards



 Figure #4: T1KVGA.COM Listing
 ------------------------------
 C:> DEBUG
 E 100
 B8 00 00 8E D8 B0 __ 3E A2 8A 04 B8 00 4C CD 21
 RCX
 0010
 NT1KVGA.COM
 W
 Q

I typed this in and substituted the 0B for the "__" in the listing. This fixed
problems that I had encountered when trying to run software that tried to
auto-detect the video modes.

                                                   -Tommy