                          THE DOS DIAGNOSTIC PROGRAM

1.0   INTRODUCTION

The diagnostic program breaks down into two main areas of functionality:
configuration and diagnostics. Configuration allows the user to configure the
TIMEWARP.INI so that it will correspond to the jumper selections on the card
while the diagnostics verify that the card is functioning properly.


2.0   CONFIGURATION

As stated in the introduction, the configuration portion of the diagnostics
program will match the actual I/O base address with the value in the
TIMEWARP.INI file. 

The diagnostics program will automatically search for  the 68890 at the four
I/O base addresses (6260h, 6280h, 62A0h, 6340h).  If the I/O base address is
different than the "890base" line in the TIMEWARP.INI file, the diagnostics
program will automatically update it.


3.0   DIAGNOSTICS

This portion of the diagnostics exercises both the 68890, and the on-board
RAM.


   3.1   Video Capture Test

   The 68890 chip is tested by directly accessing the video capture output
   and displaying it on screen.  Before executing "video capture", however,
   the user must set the following:

      Video display mode   (a) 640 x 480 24 bpp
                           (b) 640 x 480 16 bpp
                           (c) 640 x 480 8 bpp
                           (d) 320 x 200 8 bpp
      Video capture window (a) 160 x 120
                           (b) 180 x 160
                           (c) 240 x 180
      Video signal format (NTSC or PAL)
      Active video input channel (a) Composite 1
                                 (b) Composite 2
                                 (c) S Video

   NOTE:  The video display mode is dependent on the graphics adapter
   installed.  If a standard VGA card is present then only the
   320 x 200 8 bpp mode may be used.  However, if the graphics adapter
   supports the VESA BIOS Extension (VBE) through the BIOS or a TSR, then
   most modes may be selected.

   The defaults for the "video capture" are :
      Display Mode:         320 x 200 8 bpp
      Video Capture Window: 160 x 120
      Signal Format:        NTSC
      Input Channel:        Composite 1 

   Once these options have been set, the user may test video capture.  This
   option will display the frames per second (FPS) along with other capture
   test information upon return. 

   3.3   Video Capture Card RAM Test

   The 1 MB of on-board memory will be tested straight from the 68890.
   It tests memory with 0x55555555's and then tests memory with 0xAAAAAAAA's.

4.0   FILES

The diagnostics program requires the following files in the present working
directory.

                              VIDITEST.EXE
                              VIDITEST.VSF
                              VIDITEST.HLP


   



