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# IBM CORPORATION
EASY OPTIONS PROFESSIONAL AUDIO CARD AC523, EASY OPTIONS SOUND
CARD CD651
Card Type Sound card
Chip Set Unidentified
Maximum Onboard N/A
Memory
I/O Options Audio extension connector, CD-ROM audio,
CD-ROM interface, game/MIDI port, line in,
microphone in, MIDI extension connector, PC
speaker, speaker out, volume
Data Bus 16-bit ISA
Floppy drives N/A
supported
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|---------------------------+-------+----------------+-------|
| Game/MIDI port | CN1 | MIDI extension | CN6 |
| | | connector | |
|---------------------------+-------+----------------+-------|
| Audio extension connector | CN2 | Line in | J1 |
|---------------------------+-------+----------------+-------|
| CD-ROM interface | CN3 | Mic in | J2 |
|---------------------------+-------+----------------+-------|
| PC speaker | CN4 | Speaker out | J3 |
|---------------------------+-------+----------------+-------|
| CD - audio in | CN5 | Volume | VR1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------------+-------+-----------|
| » | Game port enabled | JYEN | Closed |
|---+------------------------------------+-------+-----------|
| | Game port disabled | JYEN | Open |
|---+------------------------------------+-------+-----------|
| » | MIDI base address is 330h | MSEL | Closed |
|---+------------------------------------+-------+-----------|
| | MIDI base address is 300h | MSEL | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUDIO BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | IOS0 | IOS1 |
|-----------------------+------------------+-----------------|
| » | 220h | Closed | Closed |
|-----+-----------------+------------------+-----------------|
| | 240h | Open | Closed |
|-----+-----------------+------------------+-----------------|
| | 260h | Closed | Open |
|-----+-----------------+------------------+-----------------|
| | 280h | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | IS0 | IS1 |
|--------------------+-------------------+-------------------|
| | 2/9 | Closed | Closed |
|---+----------------+-------------------+-------------------|
| » | 5 | Open | Closed |
|---+----------------+-------------------+-------------------|
| | 7 | Closed | Open |
|---+----------------+-------------------+-------------------|
| | 10 | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 8-BIT DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | DAS0 | DAS1 |
|----------------------+------------------+------------------|
| | 0 | Closed | Closed |
|-----+----------------+------------------+------------------|
| » | 1 | Open | Closed |
|-----+----------------+------------------+------------------|
| | 3 | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 16-BIT DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | DBS0 | DBS1 |
|---------------------+-------------------+------------------|
| » | 5 | Closed | Closed |
|-----+---------------+-------------------+------------------|
| | 6 | Open | Closed |
|-----+---------------+-------------------+------------------|
| | 7 | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUDIO INTERNAL AMPLIFIER CONFIGURATION |
|------------------------------------------------------------|
| Setting | OPSL | OPSR |
|------------------+--------------------+--------------------|
| | Disabled | Pins 1 & 2 closed | Pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| » | Enabled | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+