 Source Address (3b/W)</FONT></B>
<PRE>aaaaaaaa aaaaaaaa aaaaaaaa&nbsp; Full 24-bit address of DMA transfer source address</PRE>
This is where data will be read from during a DMA transfer, unless register
$43?0 bit 7 is 1, in which case this will be the destination address.&nbsp;
In an HDMA transfer, this is <I>always</I> the source address, since HDMA
is unidirectional.

<P>Qwertie's horror story: I fixed tons of graphics glitches when I figured
this out:&nbsp; you must increment the value in this register