/*
 * Intel 8237 DMA Controller
 */

#define DMA37MD_SINGLE  0x40    /* single pass mode */
#define DMA37MD_CASCADE 0xc0    /* cascade mode */
#define DMA37MD_AUTO    0x50    /* autoinitialise single pass mode */
#define DMA37MD_WRITE   0x04    /* read the device, write memory operation */
#define DMA37MD_READ    0x08    /* write the device, read memory operation */