ADLINK PCI-9810 - Manual (Page 32)

20 Registers
Trigger Mode Register
The PCI-9812/9810 has five trigger modes: software trigger, post
trigger, pre-trigger, middle trigger and delay trigger. The trigger
mode register is used to specify which trigger mode is currently
used.
Address: BASE + 08h
Attribute: write only
Data Format:
NOTE All other values for this register is not allowed. The card
will fail to acquire data if you set an unsupported value to
this register.
Bit 7 6 5 4 3 2 1 0
Base + 8 — — — — — TRGMOD2 TRGMOD1 TRGMOD0
Base + 9 — — — — — — — —
Base + A — — — — — — — —
Base + B — — — — — — — —
TRGMOD2...0 Trigger mode. See trigger mode table below.
— Any value
TRGMOD2 TRGMOD1 TRGMOD0 Trigger Mode
0 0 0 Software trigger
0 0 1 Post trigger
0 1 0 Pre-trigger
0 1 1 Delay trigger
1 0 0 Middle trigger
Table 4-2: Five Trigger Modes