Card Type	Serial controller
Chipset/Controller	16450
I/O Options	Serial ports (2)
Maximum DRAM	N/A

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 1	CN1	Serial port 2	CN2

INPUT CLOCK CONFIGURATION
MHz		J1
»	1.8432MHz	Pins 1 & 2, 3 & 6, 4 & 5 closed
	3.6864MHz	Pins 2 & 3, 4 & 5 closed
	9.216MHz	Pins 1 & 2, 5 & 6 closed
	18.432MHz	Pins 2 & 5 closed

PRIMARY PORT BASE MEMORY ADDRESS SELECT
Address		SW1	SW2
»	03F8h	Switches 1 & 2, 3 & 4, 5 & 6 on	All Off
	02E0h	Switches 1 & 2, 3 & 4, 5 & 6, 8 on	Switches 4 & 5 on
	02F8h	Switches 1 & 2, 3 & 4, 5 & 6, 8 on	All Off
	03E8h	Switches 1 & 2, 3 & 4, 5 & 6 on	Switch 4 on
Note:All switches other than those designated as on should be placed in the Off position.

ALTERNATE PORT BASE MEMORY ADDRESS SELECT
Address		SW3	SW4
»	02F8h	Switches 1 & 2, 3 & 4, 5 & 6, 8 on	All Off
	02E0h	Switches 1 & 2, 3 & 4, 5 & 6, 8 on	Switches 4 & 5 on
	03E8h	Switches 1 & 2, 3 & 4, 5 & 6 on	Switch 4 on
	03F8h	Switches 1 & 2, 3 & 4, 5 & 6 on	All Off
Note:All switches other than those designated as on should be placed in the Off position.

PRIMARY PORT INTERRUPT SELECT
IRQ	J3
IRQ2	Jumper A closed
IRQ3	Jumper B closed
IRQ4	Jumper C closed
IRQ5	Jumper D closed
IRQ6	Jumper E closed
IRQ7	Jumper F closed
IRQ10	Jumper G closed
IRQ11	Jumper H closed
IRQ12	Jumper I closed
IRQ14	Jumper J closed
IRQ15	Jumper K closed
Note: All jumpers other than those designated should be in the open position.

ALTERNATE PORT INTERRUPT SELECT
IRQ	J4
IRQ2	Jumper A closed
IRQ3	Jumper B closed
IRQ4	Jumper C closed
IRQ5	Jumper D closed
IRQ6	Jumper E closed
IRQ7	Jumper F closed
IRQ10	Jumper G closed
IRQ11	Jumper H closed
IRQ12	Jumper I closed
IRQ14	Jumper J closed
IRQ15	Jumper K closed
Note: All jumpers other than those designated should be in the open position.

PRIMARY PORT INTERRUPT SHARING
Setting		J2
»	Dedicated interrupt level	Pins 1 & 2 closed
	Interrupt sharing	Pins 2 & 3 closed

ALTERNATE PORT INTERRUPT SHARING
Setting		J2
»	Dedicated interrupt level	Pins 4 & 5 closed
	Interrupt sharing	Pins 5 & 6 closed

PRIMARY PORT AUXILIARY CHANNEL CONFIGURATION
Transmission	Reception	Loopback	J5
RTS	CTS	XCLK/RCLK	Pins 1 & 2, 3 & 6, 4 & 5 closed
XCLK	RCLK	RTS/CTS	Pins 1 & 4, 2 & 3, 5 & 6 closed
N/A	N/A	RTS/CTS/XCLK/RCLK/AUXOUT/AUXIN	Pins 1 & 4, 2 & 5, 3 & 6 closed

ALTERNATE PORT AUXILIARY CHANNEL CONFIGURATION
Transmission	Reception	Loopback	J7
RTS	CTS	XCLK/RCLK	Pins 1 & 2, 3 & 6, 4 & 5 closed
XCLK	RCLK	RTS/CTS	Pins 1 & 4, 2 & 3, 5 & 6 closed
N/A	N/A	RTS/CTS/XCLK/RCLK/AUXOUT/AUXIN	Pins 1 & 4, 2 & 5, 3 & 6 closed

PRIMARY PORT DRIVER CONFIGURATION
Driver	J6
- DTR	Pins 1 & 5 closed
+ DTR	Pins 2 & 6 closed
- RTS	Pins 3 & 7 closed
+ RTS	Pins 4 & 8 closed

ALTERNATE PORT DRIVER CONFIGURATION
Driver	J8
- DTR	Pins 1 & 5 closed
+ DTR	Pins 2 & 6 closed
- RTS	Pins 3 & 7 closed
+ RTS	Pins 4 & 8 closed