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i8237reg.h revision 1.5 
      1 /*	$NetBSD: i8237reg.h,v 1.5 1996/03/01 22:27:09 mycroft 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_SINGLE	0x40	/* single pass mode */
     11 #define	DMA37MD_CASCADE	0xc0	/* cascade mode */
     12 
     13 #define	DMA37SM_CLEAR	0x00	/* clear mask bit */
     14 #define	DMA37SM_SET	0x04	/* set mask bit */
     15