Hi, I am trying to synchronize several graphics cards on the same machine. I would like to be able to read the current status of each individual graphics card, whether they are currently in retrace or not, and also how to read/write the registers on each graphics card that store hsync/vsync values. There are literature on vga programming which does about the same job except that they are on a single graphics card. For example, simply reading the port 3dah tells whether the screen is being traced. However, I guess this only works for one graphics card. I guess for multihead display, one of the cards is still using the normal vga ports: 03c0 - 03df. Registers for other cards are rellocated somewhere else. Anyway to find out? I don't have much experience in this area. Your help is really appreciated. Thanks in advance. Jihong _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
