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Add bit definition for auto-initialize mode.

This commit is contained in:
mycroft 1996-03-01 22:27:09 +00:00
parent 9aebe01038
commit 97fbc0015b
1 changed files with 4 additions and 3 deletions
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7
sys/dev/ic/i8237reg.h
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@ -1,13 +1,14 @@
/* $NetBSD: i8237reg.h,v 1.4 1994/10/27 04:18:39 cgd Exp $ */
/* $NetBSD: i8237reg.h,v 1.5 1996/03/01 22:27:09 mycroft Exp $ */
/*
* Intel 8237 DMA Controller
*/
#define DMA37MD_SINGLE 0x40 /* single pass mode */
#define DMA37MD_CASCADE 0xc0 /* cascade 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 */