Please help me. I created a little game, using DirectDraw in DX5. The resolution is 800 x 600 x 16 bpp.
At home I have a TSENG ET 6000 video card and everything is OK, but one of my friend has S3 Trio 2/3D AGP video card. Using this card, the 16 bpp mode does not work, the picture is awfull ( colors are messy), only the 15 bpp mode works.
Please help me what is wrong, how I can determine the type of the video card to use the appropriate code, or tell me anything useful to fix this problem.