Topic       : The ATARI Compendium
Author      : Scott Sanders / JAY Software
Version     : 1.25 (20/6/2003)
Subject     : Documentation
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View Ref-FileDsp_MultBlocks()                                                      XBIOS

Syntax

VOID Dsp_MultBlocks( numsend, numreceive, sendblks, receiveblks )
LONG numsend, numreceive;
DSPBLOCK *sendblks, *receiveblks;

Function      Dsp_MultBlocks() transmit and receive multiple blocks of DSP
              data of varying size.

Opcode        127 (0x7F)

Availability  Available only when bit #3 of the '_SND' cookie is set.

Parameters    numsend and numreceive indicate the number of blocks of DSP
              data to send and receive respectively. sendblks and
              receiveblks are both pointers to arrays of type DSPBLOCK
              which contain information for each block. DSPBLOCK is
              defined as follows:

              typedef struct
              {
                #define BLOCK_LONG 0
                #define BLOCK_WORD 1
                #define BLOCK_UBYTE 2

                /* 0 = LONGs, 1 = WORDs, 2 = UBYTEs */
                WORD blocktype;

                /* Num elements in block */
                LONG blocksize;

                /* Start address of block */
                VOIDP blockaddr;
              } DSPBLOCK;

Binding       pea      receiveblks
              pea      sendblks
              move.l   numreceive,-(sp)
              move.l   numsend,-(sp)
              move.w   #$7F,-(sp)
              trap     #14
              lea      18(sp),sp

Caveats       No handshaking is performed with this call. To transfer
              blocks with handshaking use Dsp_BlkHandShake().