/* $NetBSD: i8237reg.h,v 1.7 2005/02/27 00:27:01 perry Exp $ */ /* * Intel 8237 DMA Controller */ #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_DEMAND 0x00 /* demand mode */ #define DMA37MD_SINGLE 0x40 /* single mode */ #define DMA37MD_BLOCK 0x80 /* block mode */ #define DMA37MD_CASCADE 0xc0 /* cascade mode */ #define DMA37SM_CLEAR 0x00 /* clear mask bit */ #define DMA37SM_SET 0x04 /* set mask bit */