ADLINK PCI-9810 - Manual (Page 42)

30 Operation Theory
X A/D data transfer mode
In the end of an A/D conversion, the A/D data is buffered in a
FIFO. The total FIFO size on PCI-9812/9810 is 32K samples.
This buffer size is relative to the highest data transfer rate. The
A/D data should be transferred to the computer’s memory for
further processing. The cards use DMA to transfer the A/D data
to host memory. Refer to section 5.5.
X A/D data format
To process the A/D data, programmers must be familiar with
the A/D data format. Refer to section 5.6.