UNIDENTIFIED
MIOXT-320
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 |