MIOXT-320 IO card Settings and Configuration

Card Type	Multi I/O
Chipset Controller	Unidentified
I/O Options	Floppy drive interface, game port, parallel port, serial ports (2), clock (location unidentified)
Maximum Dram	N/A

CONNECTIONS
Purpose	Location	Purpose	Location
Game port	J1	Serial port 2	J4
Parallel port	J2	Floppy drive interface	J5
Serial port 1	J3

SERIAL PORT SELECTION
J3	J4	JP1
Port 1	Port 2	Pins 2 & 3 closed
Port 2	Port 1	Pins 1 & 2 closed

SERIAL PORT CONFIGURATION
Port 1	Port 2	SW1/1	SW1/2	SW1/3	SW1/4
COM1	COM2	On	Off	On	Off
COM1	COM4	On	Off	Off	On
COM1	Disabled	On	Off	Off	Off
COM3	COM2	Off	On	On	Off
COM3	COM4	Off	On	Off	On
COM3	Disabled	Off	On	Off	Off
Disabled	COM2	Off	Off	On	Off
Disabled	COM4	Off	Off	Off	On
Disabled	Disabled	Off	Off	Off	Off

SERIAL PORT INTERRUPT SELECTION
Port 1	Port 2	SW2/1	SW2/2	SW2/3	SW2/4
IRQ3	IRQ4	Off	On	On	Off
IRQ4	IRQ3	On	Off	Off	On

PARALLEL PORT CONFIGURATION
Port	Address	SW1/5	SW1/6
Enabled	278h (LPT1)	On	Off
Enabled	378h (LPT2)	Off	On
Disabled	N/A	Off	Off

PARALLEL PORT INTERRUPT SELECTION
IRQ	SW2/5	SW2/6
IRQ5	Off	On
IRQ7	On	Off

GAME PORT CONFIGURATION
Port	SW1/7
Enabled	On
Disabled	Off

CLOCK CONFIGURATION
Clock	IRQ	SW1/8	SW2/7	SW2/8
Enabled	IRQ2	On	On	Off
Enabled	IRQ5	On	Off	On
Disabled	N/A	Off	N/A	N/A

SECOND SERIAL PORT ACTIVATION
To activate the second serial port, the following chips must be installed:
Chip	Socket
SN75188 or MC1488P	U5
SN75189 or MC1489P	U6
IC 8250	U11