1 /* $OpenBSD: i8237reg.h,v 1.3 1999/08/04 23:07:49 niklas Exp $ */
2 /* $NetBSD: i8237reg.h,v 1.5 1996/03/01 22:27:09 mycroft Exp $ */
3
4 /*
5 * Intel 8237 DMA Controller
6 */
7
8 #define DMA37MD_DEMAND 0x00 /* demand mode */
9 #define DMA37MD_WRITE 0x04 /* read the device, write memory operation */
10 #define DMA37MD_READ 0x08 /* write the device, read memory operation */
11 #define DMA37MD_LOOP 0x10 /* auto-initialize mode */
12 #define DMA37MD_SINGLE 0x40 /* single pass mode */
13 #define DMA37MD_CASCADE 0xc0 /* cascade mode */
14
15 #define DMA37SM_CLEAR 0x00 /* clear mask bit */
16 #define DMA37SM_SET 0x04 /* set mask bit */