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*                                                                  *
*                          miroVGA2TV                              *
*                                                                  *
*              (c) 1996 by miro Computer Products AG               *
*                                                                  *
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 IMPORTANT: miroVGA2TV does not work with miroMEDIA 3D/SI

 NOTE: This is a README file for the version 3.1 miroVGA2TV.

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0. Contents
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  0. Contents

  1. What is miroVGA2TV

  2. Configuring

  3. Starting

  4. Command line parameters

  5. Limitations

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1. What is miroVGA2TV
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  miroVGA2TV allows you to connect a TV set to your computer and
  use it as a graphics display also under DOS.
  In this way, you can record the operation of DOS programs to video
  or you can play DOS games using the TV set (which is larger
  than the computer monitor in most cases).
  You can also select the graphics modes listed under 5.).

  After you started miroVGA2TV, all supported miroVGA2TV graphics
  modes are routed to the RCA socket of the connected TV set.

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2. Configuring
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  In most cases, miroVGA2TV does not have to be configured and
  works automatically.
  You can make, however, special settings using command line
  parameters.

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3. Starting
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*NOTICE*
  At the time, you cannot operate this tool in the DOS box!
  If you are still in Windows 3.X or Win95, you have to leave the
  graphical user interface.

  If you want to use miroVGA2TV with a PAL TV set,
  enter
      VGA2TV     <ENTER>
  If you want to use miroVGA2TV with an NTSC TV set,
  enter
      VGA2TV /NN <ENTER>

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4. Command line parameter
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  When calling miroVGA2TV you can enter different options after
  the file name.
  If you call miroVGA2TV for the first time, the TSR is loaded into the memory
  and a part of the program stays resident (about 4k).
  If you call miroVGA2TV again, you can change some parameters.
  The following parameters are available:

  --------------------------------------------------------------------------

  General options:

  /?      - gives you brief help instructions

  /??     - gives you detailed help instructions

  /Q      - messages do not appear on the screen
            (except for error messages)

  --------------------------------------------------------------------------

  Options which are only available when loading miroVGA2TV
  (first call):

  /N[P/N] - selects the video standard (P for PAL, N for NTSC).
          - Without this parameter PAL is the default.

  --------------------------------------------------------------------------

  Options which are only active after having loaded miroVGA2TV:

  /U      - Removes miroVGA2TV from the memory

  /A      - Enables miroVGA2TV when it is in the memory
            but has been disabled with the \D parameter.

  /D      - Disables resident miroVGA2TV.
            (This option makes it possible to switch miroVGA2TV off
             temporarily without removing it from the memory).

  /M[<mode>[+/-]]
          - Use this option to switch the graphics modes supported by
            miroVGA2TV on/off. Without entering +/- the available
            modes and their present state are output.

  /O[+/-]
          - Use this option to switch the "TVOnly" mode on/off.
            If the "TVOnly" mode is switched on, the VESA BIOS
            makes only modes available which are supported by
            miroVGA2TV.

  /C[+/-]
          - This option automatically distinguishes between
            video modes 12(640x480x4) <-> 12X(320x240x8) and
            13(320x200x8) <-> 13X(320x240x8).
            If this feature is disabled, the timing for the
            video mode 13X will not be adapted.


  /F<opt>[+/-]
          - Use this option to force some timing parameters
            (You should only use this option with together with
            the /C+ option).
            This option can be useful if the application changes
            the default video timing.
      /FX - Force alternative timing for modes 12 and 13.
      /FI - Force interlaced timings.
      /FS - Force default timings for modes 12 and 13.
      /FT - Enable continuous monitoring of registers.
      /FD - Force delayed mode initialisation.


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5. Limitations
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  - miroVGA2TV supports the following graphics modes for the
    PAL and the NTSC video standards.

               Mode Resolution   Art     Standard
               -----------------------------------
                 1   40x 25x 4  Text      enabled
                 3   80x 25x 4  Text      disabled
                 D  320x200x 4  Graphics  enabled
                12  640x480x 4  Graphics  enabled
                12X 320x240x 8  Graphics  enabled
                13  320x200x 8  Graphics  enabled
                13X 320x240x 8  Graphics  enabled
               100  640x400x 8  Graphics  enabled
               101  640x480x 8  Graphics  enabled
               10D  320x200x15  Graphics  enabled
               10E  320x200x16  Graphics  enabled
               10F  320x200x32  Graphics  enabled
               110  640x480x15  Graphics  enabled
               111  640x480x16  Graphics  enabled
               112  640x480x32  Graphics  enabled

  - miroVGA2TV does not work under Windows or in the DOS box.
    Please avoid starting Windows while miroVGA2TV is active
    (remove the program entering "vga2tv -u").

  - Graphics modes larger than 640x480 pixels cannot be displayed
    on the TV screen completely and are not supported.

  - miroVGA2TV does not work with programs, which cannot initialize
    the screen via the BIOS or which modify the graphics register
    afterwards. In this case the TV monitor shows no or no still image.
