DMA Controller Programming in C

Listing 2 Header file for DMA control program

/*
vds.h - Header file for VDS function subset
Written by Robert Watson
(C) Copyright Robert Watson 1993
*/

typedef struct {
   long Size;
   long Offset;
   int Segment;
   int BufferID;
   long Address;
} VDS_DDS;

int IsVDSAvailable (void);
int RequestVDSBuffer (VDS_DDS * DDS);
int ReleaseVDSBuffer (VDS_DDS * DDS);
int DisableVDSTranslation (int Channel);
int EnableVDSTranslation (int Channel);
int CopyFromDMABuffer (VDS_DDS * DDS,
                   long BufferOffset);

/* End of File */