text: /*
   * Intel 8237 DMA Controller
   *
   * $FreeBSD: src/sys/i386/isa/ic/i8237.h,v 1.7 1999/08/28 00:45:14 peter Exp $
   * $DragonFly: src/sys/platform/pc64/isa/ic/i8237.h,v 1.1 2008/08/29 17:07:21 dillon Exp $
   */
  
  #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 */
  
  