union PCI_HEADER_TYPE_DEPENDENT { struct { unsigned char Spare[4];/* 0x0 4 */ } type0;/* 0x0 4 */ struct { unsigned char PrimaryBus;/* 0x0 1 */ unsigned char SecondaryBus;/* 0x1 1 */ unsigned char SubordinateBus;/* 0x2 1 */ unsigned char SubtractiveDecode : 1;/* 0x3:0 1 */ unsigned char IsaBitSet : 1;/* 0x3:1 1 */ unsigned char VgaBitSet : 1;/* 0x3:2 1 */ unsigned char WeChangedBusNumbers : 1;/* 0x3:3 1 */ unsigned char IsaBitRequired : 1;/* 0x3:4 1 */ } type1;/* 0x0 4 */ struct { unsigned char PrimaryBus;/* 0x0 1 */ unsigned char SecondaryBus;/* 0x1 1 */ unsigned char SubordinateBus;/* 0x2 1 */ unsigned char SubtractiveDecode : 1;/* 0x3:0 1 */ unsigned char IsaBitSet : 1;/* 0x3:1 1 */ unsigned char VgaBitSet : 1;/* 0x3:2 1 */ unsigned char WeChangedBusNumbers : 1;/* 0x3:3 1 */ unsigned char IsaBitRequired : 1;/* 0x3:4 1 */ } type2;/* 0x0 4 */};size 4 (0x4)3 members0 holespadding 01 cacheline
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