17 lines
580 B
C
17 lines
580 B
C
/* $NetBSD: i8237reg.h,v 1.6 1997/05/29 21:42:28 mycroft Exp $ */
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/*
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* Intel 8237 DMA Controller
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*/
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#define DMA37MD_WRITE 0x04 /* read the device, write memory operation */
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#define DMA37MD_READ 0x08 /* write the device, read memory operation */
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#define DMA37MD_LOOP 0x10 /* auto-initialize mode */
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#define DMA37MD_DEMAND 0x00 /* demand mode */
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#define DMA37MD_SINGLE 0x40 /* single mode */
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#define DMA37MD_BLOCK 0x80 /* block mode */
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#define DMA37MD_CASCADE 0xc0 /* cascade mode */
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#define DMA37SM_CLEAR 0x00 /* clear mask bit */
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#define DMA37SM_SET 0x04 /* set mask bit */
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