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# BIOSTAR MICROTECH INTERNATIONAL CORPORATION
MB-1325/1333ACA-S
Processor 80386SX/CX486SLC
Processor Speed 25/33MHz
Chip Set Unidentified
Max. Onboard DRAM 16MB
Cache None
BIOS AMI
Dimensions 220mm x 220mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+-----------+---------------+-----------|
| Speaker | CN1 (pins | Turbo switch | CN1 (pins |
| | 1 - 4) | | 14 - 16) |
|--------------------+-----------+---------------+-----------|
| Power LED & | CN1 (pins | +5v ground | CN1 (pins |
| keylock | 5 - 9) | | 17 - 18) |
|--------------------+-----------+---------------+-----------|
| Turbo LED | CN1 (pins | External | JP6 |
| | 10 - 11) | battery | |
|--------------------+-----------+---------------+-----------|
| Reset switch | CN1 (pins | | |
| | 12 - 13) | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CMOS memory normal operation | JP1 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP1 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Parity check enabled | JP2 | Open |
|---+--------------------------------+--------+--------------|
| | Parity check disabled | JP2 | Closed |
|---+--------------------------------+--------+--------------|
| » | Chip type select 146818 | JP4 | Open |
|---+--------------------------------+--------+--------------|
| | Chip type select Dallas | JP4 | Closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select monochrome | JP5 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select color | JP5 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Clock mode select synchronous | JP7 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Clock mode select asynchronous | JP7 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (2) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (2) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (2) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP3 | JP8 |
|------------------+--------------------+--------------------|
| 25MHz | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 33MHz | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+