1 /* 2 * Intel 8237 DMA Controller 3 * 4 * $Id: i8237.h,v 1.3 1994/11/01 17:26:47 ache Exp $ 5 */ 6 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 */ 12 13