Running DOS version

Before running the DOS version in DOS or Windows for the first time, it is recommended to select a screen mode. If this is not done, tnimage will automatically run at 8 bits/pixel and 800x600 resolution.

The procedure is:

1. Open a DOS box (or boot into DOS mode).
2. type tnimage ?
   This will print a table of screen modes tnimage can handle. All modern video cards for x86 computers can handle VESA modes. Select the desired VESA mode from the table. For example, to start tnimage in 1024 x 768 rexolution and 24 bits/pixel, type:

   tnimage -mode 118

   or alternatively, you could type

   tnimage -xres 1024 -bpp 24

   Screen modes for various graphics chips 
              |                           No. of colors  
              |------------------------------------------------------------------
              |      VESA       Tseng ET4000/W32  Trident 8800/8900 IBM XGA/XGA2
              |------------------------------------------------------------------
    Resolution|256 32k 64k 16M   256 32k 64k 16M  256 32k 64k 16M    256    64k  
   ------------------------------------------------------------------------------
    600 x 400 |100  -   -   -    -   -   -   -    -   -   -   -       -      -
    640 x 480 |101 110 111 112  2E  2E1 2E2 2E3   5D  -   -   -       4      5
    800 x 600 |103 113 114 115  30  301 302 303   5E  -   -   -       7      8
   1024 x 768 |105 116 117 118  38  381 382 383   62  -   -   -       2      -      
   1280 x 1024|107 119 11A 11B   -   -   -   -     -  -   -   -       -      -
   1600 x 1200|120  *   *   *
   
        *  Numbering for screen modes above 11b may vary from card to card.
           All VESA modes with 8 or more bits/pixel are available using the
           -xres and -bpp options.
   

   The program will store this value in its .ini file and remember it the next time tnimage is started. See the file tnimage.doc for more details.

Currently three SVGA chips are directly supported:

1. Trident 8800, 8900, or more recent chips.
2. Tseng Labs ET4000, W32, or more recent chips. Note: the older Tseng ET3000 chip is not supported. The ET4000 chip is in many cards made by a variety of manufacturers.
3. IBM XGA and XGA-2.

If these chips are not detected, tnimage will use VESA super VGA functions, which are standard on most modern video cards. For earlier video cards, such as the ATI Mach32, it is necessary to run a small program that came with your video card, named ``VVESA.COM'' (for Mach32 cards), ``VESART.COM'' (for Realtek cards), or something similar.

Certain really old video cards interacted with the mouse cursor, making smooth movement of the mouse difficult. Some older mouse drivers also cannot handle SVGA modes smoothly. It should be possible to position the mouse at each point on the screen. If you experience difficulty reaching odd-numbered pixels, try to obtain a newer mouse driver. If this doesn't help, it may be necessary to upgrade to a better SVGA card. This problem is known to occur with some RTG3106-based Realtek cards

ATI video card users:

Computers with Mach 32 ATI cards may have problems running tnimage in true-color modes from within a DOS box. The only known solution is to run tnimage from DOS, or use tnimage in an 8 bit/pixel mode (e.g., mode 103).

If your ATI video card won't go into desired screen mode, even though the manual states that mode is supported, run ATI's ``Install'' program again to verify the specified video mode is activated. If this doesn't work, it is possible that the computer was turned on before turning on the power to the monitor. ATI cards only examine the monitor type at power-up, and could become confused if the monitor is off during a cold boot-up, and refuse to set high-resolution modes.

The display in tnimage is corrupted when using ATI Mach 64 cards if the UNIVBE TSR is present.