Omega Engineering OMG-COMM8-A appendix M N S M

Card Setup

Set jumpers to “S” for shared interrupt mode on all blocks sharing an IRQ except one. Set that port block for “M”. This provides the pull-down resistor circuit that makes sharing of IRQ possible. If you are using more than one OMG-COMM8-Aor a compatible adapter in a bus you should only have one port set to “M”. The following example shows all four ports sharing a single IRQ.

7

8

3

4

E 1 0

5

6

N S M N S M

2

1

E 9

Figure 5 - Header E9 and E10, Shared IRQ Mode

Set jumper to “S” if you are using more than one OMG-COMM8-Ain a bus or you wish to completely remove the pull-down resistor for hardware compatibility. Setting the OMG-COMM8-A in this configuration when it is not accompanied by a pull-down resistor will prevent the ports from triggering an interrupt.

7

8

3

4

E 1 0

5

6

N S M N S M

2

1

E 9

Figure 6 - Header E9 and E10, Sharing IRQ’s with another adapter

Omega Engineering OMG-COMM8-A Page 7