TWINCOM A.2 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

PORT 1 CONFIGURATION
Port	jP3
COM1	Pins 5 & 9 closed
COM2	Pins 6 & 10 closed
COM3	Pins 7 & 11 closed
COM4	Pins 8 & 12 closed
Disabled	Open

PORT 1 INTERRUPT CONFIGURATION
IRQ	jP4
2	Pins 1 & 5 closed
3	Pins 2 & 6 closed
4	Pins 5 & 9 closed
5	Pins 6 & 10 closed
Disabled	Open

PORT 2 CONFIGURATION
Port	jP3
COM1	Pins 1 & 5 closed
COM2	Pins 2 & 6 closed
COM3	Pins 3 & 7 closed
COM4	Pins 4 & 8closed
Disabled	Open

PORT 2 INTERRUPT CONFIGURATION
IRQ	jP4
2	Pins 3 & 7 closed
3	Pins 4 & 8 closed
4	Pins 7 & 11 closed
5	Pins 8 & 12 closed
Disabled	Open

SECOND SERIAL PORT ACTIVATION
To activate the second serial port, the following chips must be installed:
Chip	Socket
16450 ASIC	U1
1488	U2
1489	U3