/*      $OpenBSD: i8237reg.h,v 1.3 1999/08/04 23:07:49 niklas Exp $     */
/*      $NetBSD: i8237reg.h,v 1.5 1996/03/01 22:27:09 mycroft Exp $     */

/*
 * Intel 8237 DMA Controller
 */

#define DMA37MD_DEMAND  0x00    /* demand mode */
#define DMA37MD_WRITE   0x04    /* read the device, write memory operation */
#define DMA37MD_READ    0x08    /* write the device, read memory operation */
#define DMA37MD_LOOP    0x10    /* auto-initialize mode */
#define DMA37MD_SINGLE  0x40    /* single pass mode */
#define DMA37MD_CASCADE 0xc0    /* cascade mode */
        
#define DMA37SM_CLEAR   0x00    /* clear mask bit */
#define DMA37SM_SET     0x04    /* set mask bit */