A transfers will occur automatically.

<P><A NAME="Reg43x0"></A><B><FONT FACE="Lucida Console">Register $43?0:
DMA control register (1b/W)</FONT></B>
<PRE>da-fittt&nbsp; d:(DMA only)&nbsp; 0=read from CPU memory, write to $21?? registers
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1=read from $21?? registers, write to CPU memory
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a:(HDMA only) 0=Absolute addres