sys/dev/ic/i8237reg.h

   1 /*      $NetBSD: i8237reg.h,v 1.6.56.1 2005/03/04 16:41:28 skrll 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 */