Messages in this thread | | | Subject | Re: CHALLENGE!!! =) | Date | Fri, 14 Aug 1998 13:23:50 -0700 | From | Stephen Williams <> |
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Caveat: The PCI systems I work with and BIOSes I write do not support VGA devices in general, though I have had to deal with the occasional VGA chip. So...
alex.buell@tahallah.demon.co.uk said: > Does PCI allows us to plug in say, two Matrox Millenniums, and use as > an unified X11 display across the two of the monitors?
PCI allows one to map the address of boards from the BIOS, but the VGA space is a specific exception. A VGA device responds to the VGA area *in addition to any BAR regions it may support.* So, at least one of your video cards must support turning this area off. All the linear frame buffers are not a problem as they are managed through the BARs and can be separated by normal BIOS behavior.
It's that pesky 0xa0000-0xbFFFF memory range. It is possible for some boards to have this range jumpered *off*. -- Steve Williams "The woods are lovely, dark and deep. steve@icarus.com But I have promises to keep, steve@picturel.com and lines to code before I sleep, http://www.picturel.com And lines to code before I sleep."
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