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# UNIDENTIFIED
AT-420GW SUPER I/O CARD
Chipset Winbond
Data Bus 16-bit ISA
Card Size Half height, half length
Hard Drives Two IDE(AT) devices
Supported
Floppy Drives Two 360KB, 720KB, 1.2MB, or 1.44MB drives
Supported
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------------+-------+---------------------+-------|
| 40-pin IDE(AT) | JP1 | 2-pin drive active | JP8 |
| connector | | LED | |
|----------------------+-------+---------------------+-------|
| 16-pin game port | JP2 | 34-pin cable | JP9 |
| | | connector - floppy | |
| | | drive | |
|----------------------+-------+---------------------+-------|
| 10-pin serial port 1 | JP3 | 25-pin parallel | JP15 |
| - internal | | port - external | |
|----------------------+-------+---------------------+-------|
| 9-pin serial port 2 | JP4 | | |
| - external | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|----------------------------------------+-------+-----------|
| » | IDE IOR signal from mainboard | J1 | Pins 2 & |
| | | | 3 closed |
|---+------------------------------------+-------+-----------|
| | IDE IOR signal from chipset | J1 | Pins 1 & |
| | | | 2 closed |
|---+------------------------------------+-------+-----------|
| » | IDE IOW signal from mainboard | J2 | Pins 2 & |
| | | | 3 closed |
|---+------------------------------------+-------+-----------|
| | IDE IOW signal from chipset | J2 | Pins 1 & |
| | | | 2 closed |
|---+------------------------------------+-------+-----------|
| » | Floppy drive order is normal (A:, | JP6/A | Pins 1 & |
| | B:) | | 2 closed |
|---+------------------------------------+-------+-----------|
| | Floppy drive order is reversed | JP6/A | Pins 2 & |
| | (B:, A:) | | 3 closed |
|---+------------------------------------+-------+-----------|
| » | Floppy address is 3F0h | JP6/B | Pins 2 & |
| | | | 3 closed |
|---+------------------------------------+-------+-----------|
| | Floppy address is 370h | JP6/B | Pins 1 & |
| | | | 2 closed |
|---+------------------------------------+-------+-----------|
| » | IDE(AT) interface enabled | JP6/C | Pins 1 & |
| | | | 2 closed |
|---+------------------------------------+-------+-----------|
| | IDE(AT) interface disabled | JP6/C | Pins 2 & |
| | | | 3 closed |
|---+------------------------------------+-------+-----------|
| » | IDE(AT) address is 1F0h | JP6/D | Pins 2 & |
| | | | 3 closed |
|---+------------------------------------+-------+-----------|
| | IDE(AT) address is 170h | JP6/D | Pins 1 & |
| | | | 2 closed |
|---+------------------------------------+-------+-----------|
| » | Floppy controller enabled | JP6/E | Pins 1 & |
| | | | 2 closed |
|---+------------------------------------+-------+-----------|
| | Floppy controller disabled | JP6/E | Pins 2 & |
| | | | 3 closed |
|---+------------------------------------+-------+-----------|
| | Parallel port is unidirectional | JP11 | Closed |
|---+------------------------------------+-------+-----------|
| | Parallel port is bidirectional | JP11 | Open |
|---+------------------------------------+-------+-----------|
| | Game port enabled | JP16 | Closed |
|---+------------------------------------+-------+-----------|
| | Game port disabled | JP16 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | JP9/A | JP9/B |
|-------------------+--------------------+-------------------|
| » | 3F8h (COM1:) | Pins 1 & 2 closed | Pins 2 & 3 closed |
|---+---------------+--------------------+-------------------|
| | 3E8h (COM3:) | Pins 2 & 3 closed | Pins 1 & 2 closed |
|---+---------------+--------------------+-------------------|
| | 2E8h (COM4:) | Pins 1 & 2 closed | Pins 1 & 2 closed |
|---+---------------+--------------------+-------------------|
| | Disabled | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | JP9/C | JP9/D |
|------------------+--------------------+--------------------|
| 2F8h (COM2:) | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 3E8h (COM3:) | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 2E8h (COM4:) | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| Disabled | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | JP9/E | JP9/F |
|------------------+--------------------+--------------------|
| » | 378h | Pins 2 & 3 closed | Pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | 278h | Pins 1 & 2 closed | Pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | 3BCh | Pins 1 & 2 closed | Pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | Disabled | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 INTERRUPT SELECTION |
|------------------------------------------------------------|
| Setting | JP12/A | JP12/B | JP12/C |
|----------------+--------------+--------------+-------------|
| | IRQ3 | Open | Closed | Open |
|---+------------+--------------+--------------+-------------|
| » | IRQ4 | Closed | Open | Open |
|---+------------+--------------+--------------+-------------|
| | IRQ5 | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 INTERRUPT SELECTION |
|------------------------------------------------------------|
| Setting | JP12/A | JP12/B | JP12/C |
|----------------+--------------+--------------+-------------|
| » | IRQ3 | Closed | Open | Open |
|---+------------+--------------+--------------+-------------|
| | IRQ4 | Open | Closed | Open |
|---+------------+--------------+--------------+-------------|
| | IRQ5 | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
| Setting | JP12/G | JP12/H |
|-----------------------+------------------+-----------------|
| | IRQ5 | Open | Closed |
|-----+-----------------+------------------+-----------------|
| » | IRQ7 | Closed | Open |
+------------------------------------------------------------+