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# SONY CORPORATION
CDU-31A ADAPTER BOARD
Card Type CD-ROM drive controller card
Chipset Unidentified
Maximum onboard memory Unidentified
I/O options CD-ROM audio in, line out
Hard Drives supported None
Floppy drives supported None
Data Bus 8-bit ISA
Card Size Half-length, full-height card
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location | Function | Location |
|-------------------+----------+------------------+----------|
| 34-pin | CN1 | Line out | CN3 |
| proprietary | | | |
| CD-ROM interface | | | |
| - internal | | | |
|-------------------+----------+------------------+----------|
| Audio in - CD-ROM | CN2 | 50-pin | CN4 |
| | | proprietary | |
| | | CD-ROM connector | |
| | | - external | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------------+-------+-----------|
| » | Factory configured - do not alter | JP1/C | Reserved |
|---+------------------------------------+-------+-----------|
| » | Factory configured - do not alter | JP1/D | Reserved |
|---+------------------------------------+-------+-----------|
| » | Factory configured - do not alter | JP2/D | Reserved |
|---+------------------------------------+-------+-----------|
| » | Factory configured - do not alter | JP3/D | Reserved |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP2/A | JP2/B | JP2/C | JP3/A | JP3/B | JP3/C |
|---------+--------+--------+--------+-------+-------+-------|
| 1 | On | Off | Off | On | Off | Off |
|---------+--------+--------+--------+-------+-------+-------|
| 2 | Off | On | Off | Off | On | Off |
|---------+--------+--------+--------+-------+-------+-------|
| 3 | Off | Off | On | Off | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | JP4/A | JP4/B | JP4/C | JP4/D |
|------------+-----------+-----------+-----------+-----------|
| 3 | Off | Off | On | Off |
|------------+-----------+-----------+-----------+-----------|
| 4 | Off | On | Off | On |
|------------+-----------+-----------+-----------+-----------|
| 5 | On | Off | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 6 | Off | On | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | JP1/A | JP1/B |
|--------------------+-------------------+-------------------|
| 320h | Closed | Closed |
|--------------------+-------------------+-------------------|
| 330h | Closed | Open |
|--------------------+-------------------+-------------------|
| 340h | Open | Closed |
|--------------------+-------------------+-------------------|
| 360h | Open | Open |
+------------------------------------------------------------+