RS-232C ADAPTER IO card Settings and Configuration

Card Type	Serial interface
Chipset Controller	Unidentified
I/O Options	Serial ports (2)
Maximum Dram	N/A

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 1	J1	Serial port 2	J2

INTERRUPT SELECTION
Port 1	Port 2	SW1/5	SW1/6	SW1/7	SW1/8
IRQ4	IRQ3	On	Off	Off	On
IRQ3	IRQ4	Off	On	On	Off
Disabled	Disabled	Off	Off	Off	Off

ADDRESS SELECTION
Port 1	Port 2	SW1/1	SW1/2	SW1/3	SW1/4
3F8 (COM1:)	2F8 (COM2:)	On	Off	On	Off
3F8 (COM1:)	2E8 (COM4:)	On	Off	Off	On
3E8 (COM3:)	2F8 (COM2:)	Off	On	On	Off
3E8 (COM3:)	2E8 (COM4:)	Off	On	Off	On
Disabled	Disabled	Off	Off	Off	Off

CHIP INSTALLATION
Chip	Location
8250	IC4
1488	IC2 (location unidentified)
1489	U9 (location unidentified)
Note: These chips must be installed for the second serial port to be enabled.