DSP 550 IO card Settings and Configuration

Card Type	Multi I/O Card
Chip Set	Unidentified
Maximum Onboard Memory	N/A
I/O Options	Parallel port, serial ports (2)
Data Bus	8-bit ISA

CONNECTIONS
Function	Label	Function	Label
Serial port 1	CN1	Parallel port	CN3
Serial port 2	CN2

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Ring indicator signal supplied to serial port 1	W1	Pins 1 & 2 closed
	+5 volt signal supplied to serial port 1	W1	Pins 3 & 4 closed
»	Ring indicator signal supplied to serial port 2	W2	Pins 1 & 2 closed
	+5 volt signal supplied to serial port 2	W2	Pins 3 & 4 closed
Note: Jumpers W1 and W2 are used for ensuring compatibility with specialty serial devices and older mouse systems.

PARALLEL PORT ADDRESS SELECTION
Setting	J11	J12
278h	Pins 1 & 2 closed	Pins 2 & 3 closed
378h	Pins 1 & 2 closed	Pins 1 & 2 closed
Disabled	Pins 2 & 3 closed	Pins 2 & 3 closed

SERIAL PORT 1 ADDRESS SELECTION
Setting		J7	J8
	2F8h	Pins 2 & 3 closed	Pins 1 & 2 closed
	3E8h	Pins 1 & 2 closed	Pins 2 & 3 closed
»	3F8h	Pins 1 & 2 closed	Pins 1 & 2 closed
	Disabled	Pins 2 & 3 closed	Pins 2 & 3 closed

SERIAL PORT 2 ADDRESS SELECTION
Setting		J9	J10
	2E8h	Pins 1 & 2 closed	Pins 2 & 3 closed
»	2F8h	Pins 1 & 2 closed	Pins 1 & 2 closed
	3E8h	Pins 2 & 3 closed	Pins 1 & 2 closed
	Disabled	Pins 2 & 3 closed	Pins 2 & 3 closed

SERIAL PORT 1 INTERRUPT SELECTION
IRQ		J2	J3
	IRQ2	Open	Pins 1 & 2 closed
	IRQ3	Pins 1 & 2 closed	Open
»	IRQ4	Pins 2 & 3 closed	Open
	IRQ5	Open	Pins 2 & 3 closed

SERIAL PORT 2 INTERRUPT SELECTION
IRQ		J4	J5
	IRQ2	Open	Pins 1 & 2 closed
»	IRQ3	Pins 1 & 2 closed	Open
	IRQ4	Pins 2 & 3 closed	Open
	IRQ5	Open	Pins 2 & 3 closed

PARALLEL PORT INTERRUPT SELECTION
IRQ		J1
»	IRQ7	Pins 1 & 2 closed
	IRQ5	Pins 2 & 3 closed

PARALLEL PORT MODE SELECTION
Setting	J6
Uni-directional	Pins 2 & 3 open
Bi-Directional (EPP/ECP)	Pins 2 & 3 closed