Hardware Setup

15

Multi I/O Port Addresses

Default settings for multi I/O port addresses are shown in the table below.

Port

I/O Address

IRQ

Status

 

 

 

 

LPT1*

378H

7

ECP + EPP

 

 

 

 

COM1

3F8H

4

 

COM2

2F8H

3

 

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.

COM1, COM2 – COM1/COM2 Connectors

Attach COM1/COM2 device to these connectors.

FDC Connector

Attach floppy cable to this connector.

J19 – Hardware Reset Control

Attach the reset switch to J19. Closing the Reset switch restarts the system.

J24 – HDD LED Connector

Attach the cable of hard disk drive LED to this connector. The LED lights when an HDD is active.

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SOYO P55C, P54C manual Multi I/O Port Addresses

P55C, P54C specifications

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