With both DAP 5216a boards running, each DAP 5216a was updating outputs at the maximum aggregate rate of 2MS/s. The test configuration is described below.

Hardware setup

• Two DAP 5216a/627 boards were installed with DAPcell Network Server v4.15 in a DAPserver522.
• The DAPserver522 had a Pentium M 1.8GHz processor, a 250GB SATA 3Gb/s hard drive, 512MB DDR2 memory, and Windows XP SP2.

Software setup

• The C++ example, DPDFEED, in the DAP Development software package was modified for a block size of 1048576 and to show the output count updated by the DAP.
• The buffer size of the binary input communication pipe to the DAP board, $BININ, was increased from the default size of 4096 to 1048576 elements in the registry.
• Two data files of over 4GB each were created, which allowed the test to run for almost 20 minutes.
• A DAPL file was created to send data from $BININ to 32 digital output addresses using the TWOWRITE command. With 32 outputs and the two-write protocol used by TWOWRITE, the aggregate output rate of 2MS/s translates to 31.25 kS/s per output channel (2 MS/s / 32 / 2).
• Two copies of DPDFEED ran in separate DOS command windows for the two DAP boards.