2 * Intel 8237 DMA Controller
7 #define DMA37MD_SINGLE 0x40 /* single pass mode */
8 #define DMA37MD_CASCADE 0xc0 /* cascade mode */
9 #define DMA37MD_AUTO 0x50 /* autoinitialise single pass mode */
10 #define DMA37MD_WRITE 0x04 /* read the device, write memory operation */
11 #define DMA37MD_READ 0x08 /* write the device, read memory operation */