显存地址映射。只要知道该类PCI设备的Vendor号，Device号和索引号myIndex，就可以查找到该类PCI设备的MEMORY地址和IO地址，以及中断级。并将第一个MEMORY地址给出它的从物理地址到虚拟地址的映射。-memory address mapping. If that such equipment Vendor PCI, Device and No. myIndex Index, it can find to such equipment PCI Memory addresses and IO address, and interrupt level. Memory will be the first to give it the address from the physical address of the virtual address mapping.