User`s guide

Card Setup
OMG-ISO-COMM Page 5
Set jumper to ‘S’ if you are using more than one OMG-ISO-COMM in a bus or
you wish to completely remove the pull-down resistor for hardware compatibility.
Setting the board in this configuration when it is not accompanied by a pull-
down resistor will prevent the ports from triggering an interrupt.
M
S
N
M
S
N
E5
1
2
3 4
Figure 6 - Header E5, Sharing IRQs with another adapter
2 3 4 5 7
10 11 12 15
2 3 4 5 7
10 11 12 15
2 3 4 5 7
10 11 12 15
E3 - Port2
E4 - Port1
E2 - Port3
E1 - Port4
2 3 4 5 7
10 11 12 15
M
S
N
M
S
N
E5
1 2
3 4
Figure 7 - IRQ Headers E1 - E5 (Factory Default)
The above example shows the correlation between jumper block E5 and the
interrupt jumpers (E1-E4). This example shows the OMG-ISO-COMM shipping
configuration with COM1: & COM3: sharing interrupt 4 and COM2: & COM4:
sharing interrupt 3.