Card Type	Serial card
Chip Set	Unidentified
Data Bus	8-bit ISA

CONNECTIONS
Function	Label	Function	Label
9-pin serial port 1	CN1	26-pin parallel port - internal	CN3
9-pin serial port 2	CN2

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Serial port 1 half duplex gate disabled	J5A	Pins 1 & 2 closed
	Serial port 1 half duplex gate enabled when RTS true	J5A	Pins 2 & 3 closed
»	Serial port 1 half duplex RTS disabled	J5B	Pins 1 & 2 closed
	Serial port 1 half duplex RTS enabled	J5B	Pins 2 & 3 closed
»	Serial port 1 half duplex CTS1 disabled	J5C	Pins 1 & 2 closed
	Serial port 1 half duplex CTS1 enabled	J5C	Pins 2 & 3 closed
»	Serial port 2 half duplex gate disabled	J6A	Pins 1 & 2 closed
	Serial port 2 half duplex gate enabled when RTS true	J6A	Pins 2 & 3 closed
»	Serial port 2 half duplex RTS disabled	J6B	Pins 1 & 2 closed
	Serial port 2 half duplex RTS enabled	J6B	Pins 2 & 3 closed
»	Serial port 2 half duplex CTS1 disabled	J6C	Pins 1 & 2 closed
	Serial port 2 half duplex CTS1 enabled	J6C	Pins 2 & 3 closed

SERIAL PORT ADDRESS SELECTION
Setting	J2 Port 1	J2 Port 2
COM1	Pins 1 & 2 closed	Pins 2 & 3 closed
COM2	Pins 4 & 5 closed	Pins 5 & 6 closed
COM3	Pins 7 & 8 closed	Pins 8 & 9 closed
COM4	Pins 10 & 11 closed	Pins 11 & 12 closed
COM5	Pins 13 & 14 closed	Pins 14 & 15 closed
COM6	Pins 16 & 17 closed	Pins 17 & 18 closed
COM7	Pins 19 & 20 closed	Pins 20 & 21 closed
COM8	Pins 22 & 23 closed	Pins 23 & 24 closed

SERIAL PORT 1 INTERRUPT SELECTION
IRQ		J3
	IRQ2	Pins 11 & 12 closed
»	IRQ3	Pins 9 & 10 closed
	IRQ4	Pins 7 & 8 closed
	IRQ5	Pins 5 & 6 closed
	IRQ6	Pins 3 & 4 closed
	IRQ7	Pins 1 & 2 closed
	IRQ10	Pins 13 & 14 closed
	IRQ11	Pins 15 & 16 closed
	IRQ12	Pins 17 & 18 closed
	IRQ14	Pins 19 & 20 closed
	IRQ15	Pins 21 & 22 closed

SERIAL PORT 2 INTERRUPT SELECTION
IRQ		J4
	IRQ2	Pins 11 & 12 closed
»	IRQ3	Pins 9 & 10 closed
	IRQ4	Pins 7 & 8 closed
	IRQ5	Pins 5 & 6 closed
	IRQ6	Pins 3 & 4 closed
	IRQ7	Pins 1 & 2 closed
	IRQ10	Pins 13 & 14 closed
	IRQ11	Pins 15 & 16 closed
	IRQ12	Pins 17 & 18 closed
	IRQ14	Pins 19 & 20 closed
	IRQ15	Pins 21 & 22 closed

SERIAL PORT 1 MULTIPLEX SELECTION
Setting		J7
»	Multiplex disabled	Pins 1 & 3, 2 & 4 closed
	Signal transmitted & received	Pins 3 & 5, 4 & 6 closed
	Signals shorted together	Pins 3 & 5, 4 & 6 closed

SERIAL PORT 2 MULTIPLEX SELECTION
Setting		J8
»	Multiplex disabled	Pins 1 & 3, 2 & 4 closed
	Signal transmitted & received	Pins 3 & 5, 4 & 6 closed
	Signals shorted together	Pins 3 & 5, 4 & 6 closed

PARALLEL PORT SELECTION
Setting		J1/pins 1 & 2	J1/pins 3 & 4	J1/pins 5 & 6
	LPT1	Open	Open	Closed
	LPT2	Open	Closed	Open
»	LPT3	Closed	Open	Open