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# DYNA MICRO, INC.
MBA-386B-25
Processor 80386DX
Processor Speed 25MHz
Chip Set UMC
Max. Onboard DRAM 12MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Speed display | J1 | Speaker | J5 |
|----------------+----------+---------------------+----------|
| Auxiliary | J2 | Power LED & keylock | J6 |
| keyboard | | | |
|----------------+----------+---------------------+----------|
| Reset switch | J3 & J14 | Turbo LED | J7 |
|----------------+----------+---------------------+----------|
| Turbo switch | J4 & J13 | External battery | J11 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select monochrome | J8 | open |
|---+----------------------------------+--------+------------|
| | Monitor type select color | J8 | closed |
|---+----------------------------------+--------+------------|
| » | NPU type select 3167 or none | J9 | closed |
|---+----------------------------------+--------+------------|
| | NPU type select 80387 | J9 | open |
|---+----------------------------------+--------+------------|
| » | Battery select internal | J12 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battery select external | J12 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP6 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP7 | pins 2 & 3 |
| | alter | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 256K x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 | NONE |
|------------+---------------+---------------+---------------|
| 3MB | (4) 256K x 9 | (4) 256K x 9 | (4) 256K x 9 |
|------------+---------------+---------------+---------------|
| 4MB | (4) 1M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------------+---------------+---------------+---------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/1 | SW1/2 | SW1/3 |
|--------------+---------------+--------------+--------------|
| 1MB | On | On | On |
|--------------+---------------+--------------+--------------|
| 2MB | On | Off | On |
|--------------+---------------+--------------+--------------|
| 3MB | On | Off | Off |
|--------------+---------------+--------------+--------------|
| 4MB | Off | On | On |
|--------------+---------------+--------------+--------------|
| 8MB | Off | Off | On |
|--------------+---------------+--------------+--------------|
| 12MB | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | SW1/1 | SW1/2 | SW1/3 |
|---------------+--------------+--------------+--------------|
| 80ns | On | On | On |
|---------------+--------------+--------------+--------------|
| 100ns | On | Off | On |
+------------------------------------------------------------+