Omega Engineering OMG-COMM8-A appendix Interrupt Mode Options, M N S M

Card Setup

Interrupt Mode Options

The OMG-COMM8-Awill allow each port to have an independent interrupt level or share an interrupt with another port on the adapter. The OMG-COMM8-Awill even share interrupts with a compatible port that is located on another adapter. The OMG-COMM8-Acan operate in three interrupt modes. Header E9 determines the interrupt mode for Ports 1-4 and header E10 determines the interrupt mode for ports 5-8.

“N” indicates the (N)ormal, single interrupt per port mode. “S” Indicates the (S)hared interrupt mode, which allows more than one port to access a single IRQ. Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting, and setting the appropriate selections at E5. Consult your particular software for IRQ selection. If no interrupt is desired, remove the jumper. “M” indicates the inclusion of a 1K ohm pull- down resistor required on one port when sharing interrupts.

7

8

3

4

E 1 0

5

6

N S M N S M

2

1

E 9

Figure 4 - Header E9 and E10, Normal IRQ Mode

Omega Engineering OMG-COMM8-A Page 6