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 | |