diff options
Diffstat (limited to 'sys/dev/ic/i8237.h')
| -rw-r--r-- | sys/dev/ic/i8237.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/dev/ic/i8237.h b/sys/dev/ic/i8237.h new file mode 100644 index 0000000..dc269f2 --- /dev/null +++ b/sys/dev/ic/i8237.h @@ -0,0 +1,9 @@ +/* + * Intel 8237 DMA Controller + */ + +#define DMA37MD_SINGLE 0x40 /* single pass mode */ +#define DMA37MD_CASCADE 0xc0 /* cascade mode */ +#define DMA37MD_WRITE 0x04 /* read the device, write memory operation */ +#define DMA37MD_READ 0x08 /* write the device, read memory operation */ + |
