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14
Multi I/O Port Addresses
Default settings for multi-I/O port addresses are shown in the table
below.
Port
LPT1*
COM1
COM2
* If default I/O port addresses conflict with other I/O cards (e.g. sound
cards or I/O cards), you must adjust one of the I/O addresses to avoid
address conflict. (You can adjust these I/O addresses from the BIOS.
Note:
Some sound cards have a default IRQ setting for IRQ7, which
may conflict with printing functions. If this occurs do not use
sound card functions at the same time you print.
Connectors
Attach the mainboard to case devices via connectors on the mainboard.
Refer to Figure 1-1 for connector locations and connector pin positions.
PW2 — ATX Power Supply On/Off Switch Connector
(Momentary Type)
Attach a two-pin switch to this connector for turning the ATX power
supply on/off.
COM1, COM2 — COM1/COM2 Connectors
Attach COM1/COM2 device cable to these connectors. Refer to the
following drawing for pin assignment:
5
9
CN1
6
1
1
CN1
1
6
CN2
1
2
I/O Address
378H
3F8H
2F8H
300 30mm
2
7
3
4
IRQ
7
4
3
RED
3
8
4
5
6
7
Hardware Setup
Status
ECP + EPP
10
9
2
1
9
5
NC
8
9
10
CN2
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