[MSDN Library June 1998] 3.3.4.2 Common-Buffer System DMA (27.1500721500721%)
MSDN Library Visual Studio 6.0 > DDK Documentation > Microsoft Windows NT 4.0 DDK > Kernel-Mode Drivers > Design Guide > Chapter 3 NT Objects and Support for Drivers > 3.3 Adapter Objects and DMA > 3.3.4 Using System DMA