Interrupts
Use PCIFind.EXE to determine the IRQ that was assigned to the card by the BIOS or Operating
System. Alternatively, in Windows 9x, the Device Manager can be used. The card’s ports are
listed under the Ports class. Selecting the port, clicking Properties, then selecting the Resources
tab will show the base addresses and IRQ assigned to the port.
X1
X4
RS
4
8
5-
B
R
S
4
8
5-
A
LD O
LD O
LD I
LD I
R S422
R S422
A
B
Figure 3-1:
Option Selection Map
Jumpers
RS422:
Select differential(RS-422, four-wire) communications mode
RS485-A, RS485-B:
Select differential(RS-485, two-wire) communications mode
LDO:
Apply load to RS-422 or RS-485 output
LDI:
Apply load to RS-422 input
X1/X4:
Select either 115.2 Kbaud or 460.8 Kbaud maximum
Manual PCI-ICM-2S
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