I have made a grapical program using 640x480x256 SVGA. This run fine under DOS, WIN95, WIN98 and WINNT. Now I'm using WinXP and the program doesn't work anymore. On one computer this error message is given "NTVDM-CPU found invalid instruction" on an other the program simply hangs. I have been using 2 different VGA drivers, SVGA256.BGI and BGI256.BGI, but both with the same result.