DEC finds and wants - test-drb@ccmp.vtda.org

3 May 2001

On May 3, Chad Fernandez wrote:
...
  BTW, I have an M3104.  It's supposed to be an
8-line Asynchronous
 Multiplexor, with DMA.  What does that mean/Do/etc? 
  It's eight serial ports that use DMA (Direct Memory Access) to
transfer blocks of characters to/from buffers set up in the host
processor's memory.  Using DMA is a way to improve the performance of
an I/O subsystem by reducing its dependency on the host processor for
moving data back and forth.

          -Dave McGuire