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Omega Engineering OMG-COMM8-A Page 5
IRQ Selection
The OMG-COMM8-A has an interrupt selection jumper that corresponds
to each port that may have to be set prior to use. The software you are
using with the board will determine which interrupts, if any are to be used.
The DOS serial port interface software does not use interrupts, while
interrupt buffer programs do. DOS does not require the interrupt to be set,
while most Multi - User Operating Systems will. Consult the particular
manual for the software that you are using to determine the proper setting.
To set the interrupt for a particular port, first select the header for the port
desired. Headers E1-E8 correspond to Ports 1-8. Next select an IRQ by
placing one of the jumpers on the header location that corresponds to the
IRQ number that you wish to use. Below is an example of a selected IRQ.
Figure 3 - Headers E1 to E8 (IRQ15 selected)
2 3 4 5 6 7 10 11 12 15