1 /*        $NetBSD: i8237reg.h,v 1.8 2005/12/11 12:21:26 christos Exp $          */
2 
3 /*
4  * Intel 8237 DMA Controller
5  */
6 
7 #define   DMA37MD_WRITE       0x04      /* read the device, write memory operation */
8 #define   DMA37MD_READ        0x08      /* write the device, read memory operation */
9 #define   DMA37MD_LOOP        0x10      /* auto-initialize mode */
10 #define   DMA37MD_DEMAND      0x00      /* demand mode */
11 #define   DMA37MD_SINGLE      0x40      /* single mode */
12 #define   DMA37MD_BLOCK       0x80      /* block 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 */
17