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# AMERICAN MEGATRENDS, INC.
80386B
Processor 80386SX
Processor Speed 16/20/25MHz
Chip Set C & T
Video Chip Set None
Maximum Onboard 16MB (8MB on external memory card)
Memory
Maximum Video None
Memory
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options External memory cards (2)
NPU Options 80287 (exact location
unidentified)/80387SX/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Power LED & | J17 | Turbo LED | J22 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J18 | External memory | SL1 & |
| | | cards | SL2 |
|-------------------+----------+------------------+----------|
| External battery | J20 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|------------------------------------+-------+---------------|
| | Jumper information unavailable | J19 | Unidentified |
|---+--------------------------------+-------+---------------|
| | 80287 installed | JP1 | Closed |
|---+--------------------------------+-------+---------------|
| | 80287 not installed | JP1 | Open |
|---+--------------------------------+-------+---------------|
| | Monitor type select color | JP3 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Monitor type select monochrome | JP3 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Jumper information unavailable | JP5 | Unidentified |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (4) 256K x | None | None | None |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (4) 256K x | None | None |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 256K x | (4) 256K x | (36) 41256 | (36) 41256 |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | None | None | None |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | None | None |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 1M x 9 | (4) 1M x 9 | (36) 41256 | (36) 41256 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (36) | (36) |
| | | | 411000 | 411000 |
|------------------------------------------------------------|
| Note: Banks 2 & 3 are located on the external memory card. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | J21 |
|----------------------------+-------------------------------|
| 16MHz | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 20MHz | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 25MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP11 | JP12 |
|---------------------+-------------------+------------------|
| 80387 installed | Closed | Closed |
|---------------------+-------------------+------------------|
| 80387 not installed | Open | Open |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP1 | JP2 |
|--------------------+-------------------+-------------------|
| Card configured as | Pins 1 & 2, 4 & 5 | Pins 1 & 2, 4 & 5 |
| Bank 0 & 1 | closed | closed |
|--------------------+-------------------+-------------------|
| Card configured as | Pins 2 & 3, 5 & 6 | Pins 2 & 3, 5 & 6 |
| Bank 2 & 3 | closed | closed |
|------------------------------------------------------------|
| Note: If all 4 banks are populated, memory card must be |
| set as banks 2 & 3. Jumpers JP1 & JP2 are incorrectly |
| labeled in the card. The correct label should read banks |
| selection. |
+------------------------------------------------------------+