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# BIOSTAR MICROTECH INTERNATIONAL CORPORATION
MB-2500SX
Processor 80386SX
Processor Speed 16/20/25MHz
Chip Set C & T
Max. Onboard 16MB
DRAM
Cache None
BIOS AMI
Dimensions 284mm x 175mm
I/O Options 16-bit riser card slot, floppy drive
interface, IDE interface, serial ports (2),
parallel port/external floppy drive port
NPU Options 80387
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External power | CN2 | IDE drive | JP1-4 |
| | | interface LED | |
|---------------------+----------+----------------+----------|
| Serial port 2 | CN3 | Power LED | JP1-5 |
|---------------------+----------+----------------+----------|
| Serial port 1 | CN4 | Network | JP1-6 |
| | | activity LED | |
|---------------------+----------+----------------+----------|
| Parallel | CN5 | Network | JP1-7 |
| port/external | | activity LED | |
| floppy drive port | | | |
|---------------------+----------+----------------+----------|
| IDE drive interface | CN6 | Floppy drive | JP8-1 |
| | | interface LED | |
|---------------------+----------+----------------+----------|
| Floppy disk | CN7 | Floppy disk | JP8-2 |
| interface | | eject button | |
|---------------------+----------+----------------+----------|
| 16-bit riser card | CN9 | Power switch | PW1 |
|---------------------+----------+----------------+----------|
| Turbo switch | JP1-1 | Floppy drive | PW2 |
| | | power | |
|---------------------+----------+----------------+----------|
| Turbo LED | JP1-2 | IDE drive | PW3 |
| | | power | |
|---------------------+----------+----------------+----------|
| Reset switch | JP1-3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | Battery type select internal | J4 | Closed |
|---+------------------------------------+--------+----------|
| | Battery type select external | J4 | Open |
|---+------------------------------------+--------+----------|
| » | Monitor type select color | SW1/3 | On |
|---+------------------------------------+--------+----------|
| | Monitor type select monochrome | SW1/3 | Off |
|---+------------------------------------+--------+----------|
| » | External floppy drive select A: / | SW1/4 | On |
| | Internal floppy drive select B: | | |
|---+------------------------------------+--------+----------|
| | External floppy drive select B: / | SW1/4 | Off |
| | Internal floppy drive select A: | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 |
|------------------+--------------------+--------------------|
| 10MB | (2) 4M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 |
|--------------------+-------------------+-------------------|
| LPT2 at 378-37F | On | Off |
|--------------------+-------------------+-------------------|
| LPT3 at 378-37F | Off | On |
+------------------------------------------------------------+