I have been trying to get a TT video card to work on my C600. I have tried one that has a rom labled: Twin Turbo 128M8, Revision 3.6. It seems to work ok but gives a line across the screen horizontally spaced about 1/4 inch apart on my 13 inch screen. The lines persist at the same spacing no matter what resolution I use. I suspect a bad memory address on the card.
The other card has a rom labled: Twin Turbo Cemax DB5, Revision 3.8C. It seems to be hard wired to a resolution of 1600x1200, 66 Hz - way out of range of the monitors I have. There are no other resolutions listed as available. When connected with another monitor on the motherboard connector it seems to mirror the other monitor as close as I can tell. There is obviously no dicernable picture but the flickering is in sync with the other monitor when something happens. There are 2 sets of jumper pads near the center of the card labeled JP1 and JP2. JP2 has pins 1 and 2, 7 and 8, and 9 and 10, connected by wires soldered onto the board. The other card has similar pads but has removeable jumpers at 1 and 2 on JP2 and 3 and 4 on JP1. Any suggestions would be most appreciated.
redsilo
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