PciGetDword
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function PciGetDword(bus,dev,func, offset : Word): Longword;
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bus - PCI bus number (0..GetLastPciBus),
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dev - PCI device on bus (0..31),
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func - function number of device (0..7),
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offset - the byte offset from the beginning of the configuration space.
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32-bit double word value from the configuration space.
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