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RE: Multi-channel VGA card

>We intend to develop a PCI video card with two VGA chips on it. Have 
>anybody had any experience in design such a card.
>We are not sure what need to be done so that both VGA chips can be 
>accessible by Windows 98 and NT5.0 multi-monitors facilities.
>Any advice or suggestions are welcome.

One point from a hardware perspective: make sure you present only one
electrical load to the PCI bus.  If there are two VGA chips, they must
be behind a bridge.