Omega-vehicle-security ISA RS-422 Bedienungsanleitung PDF herunterladen (Seite 7)

Card Setup

OMG-ULTRA-SIO Page 3

IRQ Selection

Headers E11 and E12 select the interrupt request for each serial port. If COM1: is

selected, the corresponding jumper must be on the IRQ4 setting. If COM2: is

selected, the corresponding jumper must be on IRQ3.

Note: Most communications software applications default COM3: to IRQ4 and

COM4: to IRQ3. This requires the sharing of interrupts between COM1:

and COM3:, and between COM2: and COM4:. While this is the default, it

is not always the preferred setting. Check your software configuration

instructions to determine the most appropriate IRQ selection.

2/9

Figure 2 - Header E11 and E12, IRQ Selection

Any two or more ports can share a common IRQ by placing the jumpers on the

same IRQ setting at header E11 and E12 and setting the appropriate selections at

E5 and E6. Note that a polling type driver is needed to share interrupts in this

fashion. Windows does not supply a polling type driver. Consult your particular

software for IRQ selection. If no interrupt is desired, remove the jumper.

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Omega-vehicle-security ISA RS-422 Bedienungsanleitung Seite 7