Card Type	Serial
Chipset	16554
I/O Options	Serial ports (4)
Data Bus	16-bit ISA
Card Size	Full height, three-quarters length

CONNECTIONS
Function	Label	Function	Label
Serial port 1	J1	Serial port 5	J5
Serial port 2	J2	Serial port 6	J6
Serial port 3	J3	Serial port 7	J7
Serial port 4	J4	Serial port 8	J8

USER CONFIGURABLE SETTINGS
Setting		Label	Position
»	Factory configured - do not alter	SW1/1	Off
	Interrupt mask enabled	SW2/1	On
	Interrupt mask disabled	SW2/1	Off

BASE I/O ADDRESS SELECTION
Setting		SW1/2	SW1/3	SW1/4	SW1/5	SW1/6	SW1/7	SW1/8
	0000h	On	On	On	On	On	On	On
	0040h	Off	On	On	On	On	On	On
	0080h	On	Off	On	On	On	On	On
	00C0h	Off	Off	On	On	On	On	On
	0100h	On	On	Off	On	On	On	On
»	0280h	On	Off	On	Off	On	On	On
	1EC0h	Off	Off	On	Off	Off	Off	Off
	1F00h	On	On	Off	Off	Off	Off	Off
	1F40h	Off	On	Off	Off	Off	Off	Off
	1F80h	On	Off	Off	Off	Off	Off	Off
	1FC0h	Off	Off	Off	Off	Off	Off	Off
Note: A total of 256 base address settings are available. The switches are a binary representation of the decimal memory addresses. SW1/8 is the Most Significant Bit and switch SW1/2 is the Least Significant Bit. The switches have the following decimal values: SW1/8=4096, SW1/7=2048, SW1/6=1024, SW1/5=512, SW1/4=256, SW1/3=128, SW1/2=64. Turn off the switches and add the values of the switches that are off to obtain the correct memory address. (Off=1, On=0)

INTERRUPT SELECTION
Setting	SW2/2	SW2/3	SW2/4	SW2/5	SW2/6	SW2/7	SW2/8
2	On	Off	Off	Off	Off	Off	Off
3	Off	On	Off	Off	Off	Off	Off
4	Off	Off	On	Off	Off	Off	Off
5	Off	Off	Off	On	Off	Off	Off
7	Off	Off	Off	Off	On	Off	Off
10	Off	Off	Off	Off	Off	On	Off
11	Off	Off	Off	Off	Off	Off	On