i8237reg.h revision 1.3
1 /* 2 * Intel 8237 DMA Controller 3 * 4 * $Id: i8237reg.h,v 1.3 1994/03/01 18:18:07 mycroft Exp $ 5 */ 6 7 #define DMA37MD_SINGLE 0x40 /* single pass mode */ 8 #define DMA37MD_CASCADE 0xc0 /* cascade mode */ 9 #define DMA37MD_WRITE 0x04 /* read the device, write memory operation */ 10 #define DMA37MD_READ 0x08 /* write the device, read memory operation */ 11 12 #define DMA37SM_CLEAR 0x00 /* clear mask bit */ 13 #define DMA37SM_SET 0x04 /* set mask bit */ 14
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