Speed problem on 2 monitor

[alex21cn]

Hi, Matan,  Thank you! I've got 2 cards working. 1st is S3Trio 64V+, 2nd is Riva 128 AGP. THANK YOU SO MUCH!  I've found another problem too. I use this program   #include <vga.h> #include <vgagl.h>   main() { int i,j;   int r,g,b;    vga_init();   vga_setmode(G640x480x32K);   while(1){      for(i=1;i<640;i++)  {  r=i*255/640;  g=128;  b=255-r-g;  vga_setrgbcolor(r,g,b);  vga_drawline(0,0,i,479);  vga_setrgbcolor(0,0,0);  vga_drawline(0,0,i-1,479);  }    }    vga_setmode(TEXT);  }   It will draw a line from 0,0 to the bottom line. When only 1 instance is running, it is quite fluent. But when 2 instances are running on 2 differenct monitors, there is a   problem:   On monitor 1, the program will draw that motion line for a while, and pause. During the pause, the program on monitor 2 will draw motion line quite fluently, Then it pauses too. So monitor 1 is going, pause, monitor 2 is going, pause ,  monitor 1...   Our application will capture video from 2 cards, and play them on 2 monitor seperately, and the speed must be 20 frame per second. I don't know whether svgalib is fast enough to do the output.    Could you give me help?   Thank you again.   Alex Wen