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# MECER CORPORATION
B-301 (REV. B)
Card Type Sound card
Chipset ES488
Controller
I/O Options CD audio in, CD-ROM interface (2), line in, line
out, microphone in (2), speaker out, volume
Maximum DRAM N/A
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Speaker out | J1 | Mistumi CD-ROM | JP105 |
| | | interface | |
|------------------+----------+-------------------+----------|
| Microphone in | J2 | CD audio in | JP109 |
|------------------+----------+-------------------+----------|
| Line in | J3 | External control | JP110 |
| | | (see table below) | |
|------------------+----------+-------------------+----------|
| Panasonic CD-ROM | J7 | Sound output | JP112 |
| interface | | (left) | |
|------------------+----------+-------------------+----------|
| External | JP101 | Volume | VR |
| microphone in | | | |
|------------------+----------+-------------------+----------|
| Sound output | JP102 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTERNAL CONTROL CONNECTION/ JP110 |
|------------------------------------------------------------|
| Purpose | Location |
|-------------------------------+----------------------------|
| Active low/read, port 201h | Pin 1 |
|-------------------------------+----------------------------|
| External microphone in | Pin 2 |
|-------------------------------+----------------------------|
| Active low/write, port 201h | Pin 3 |
|-------------------------------+----------------------------|
| FM output | Pin 4 |
|-------------------------------+----------------------------|
| Sound out (left) | Pin 5 |
|-------------------------------+----------------------------|
| Ground | Pin 6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | JP1 |
|----------------------------+-------------------------------|
| » | 7 | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| | 2 | Pins 7 & 8 closed |
|---+------------------------+-------------------------------|
| | 3 | Pins 5 & 6 closed |
|---+------------------------+-------------------------------|
| | 5 | Pins 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | JP4 |
|----------------------------+-------------------------------|
| » | 220h | Pins 3 & 7, 4 & 8 closed |
|---+------------------------+-------------------------------|
| | 240h | Pins 1 & 5, 2 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA SELECTION |
|------------------------------------------------------------|
| Channel | JP2 | JP3 |
|------------------+--------------------+--------------------|
| » | 1 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|----+-------------+--------------------+--------------------|
| | 3 | Pins 3 & 4 closed | Pins 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CD ROM TYPE SELECTION |
|------------------------------------------------------------|
| Type | J6 |
|----------------------------+-------------------------------|
| » | Panasonic | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| | Mitsumi | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CD-ROM CONFIGURATION |
|------------------------------------------------------------|
| Setting | JCP2 |
|---------------------------------+--------------------------|
| » | Enabled | Closed |
|---+-----------------------------+--------------------------|
| | Disabled | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CD ROM ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | JCP1 |
|--------------------------------+---------------------------|
| » | 300h | Closed |
|------+-------------------------+---------------------------|
| | 340h | Open |
+------------------------------------------------------------+