ADLINK PCI-8144 - Manual (Page 58)

48 Operation Theory
The GPIO interrupt sources are maskable. The mask bits table is
shown below:
GPIO Interrupt Source Bit Settings (1=Enable,0=Disable)
After seting the factors of interrupt, users can use wait functions to
wait the interrupts, it uses no processor time while waiting for the
specified interrupt to become signaled or the time-out interval to
elapse.
Bit Description
0 DI0 falling edge
1 DI1 falling edge
2 DI2 falling edge
3 DI3 falling edge
4 DI4 falling edge
5 DI5 falling edge
6 DI6 falling edge
7 DI7 falling edge
8 DI0 rising edge
9 DI1 rising edge
10 DI2 rising edge
11 DI3 rising edge
12 DI4 rising edge
13 DI5 rising edge
14 DI6 rising edge
15 DI7 rising edge