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# UNIDENTIFIED
404 386SX
Processor 80386SX
Processor Speed 16/20/25MHz
Chip Set ALI
Video Chip Set None
Maximum Onboard Memory 8MB
Maximum Video Memory None
Cache None
BIOS AMI
Dimensions 254mm x 218mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Power LED & | J20 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Reset switch | J18 | Turbo LED | J21 pins |
| | | | 1 & 2 |
|------------------+----------+-------------------+----------|
| Speaker | J19 | Turbo switch | J21 pins |
| | | | 4 & 5 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| | Fast A20 gate signal from chip | J4 | Pins 1 & 2 |
| | set | | closed |
|---+-----------------------------------+-------+------------|
| | Fast A20 gate signal from | J4 | Pins 2 & 3 |
| | keyboard controller | | closed |
|---+-----------------------------------+-------+------------|
| | Monitor type select color | JP1 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Monitor type select monochrome | JP1 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 512KB | (2) 256K x | None | None | None |
| | 9 | | | |
|-------+-------------+------------+------------+------------|
| 1MB | (2) 256K x | (2) 256K x | None | None |
| | 9 | 9 | | |
|-------+-------------+------------+------------+------------|
| 1.5MB | (2) 256K x | (2) 256K x | (2) 256K x | None |
| | 9 | 9 | 9 | |
|-------+-------------+------------+------------+------------|
| 2MB | (2) 256K x | (2) 256K x | (2) 256K x | (2) 256K x |
| | 9 | 9 | 9 | 9 |
|-------+-------------+------------+------------+------------|
| 2MB | (2) 1M x 9 | None | None | None |
|-------+-------------+------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | None | None |
|-------+-------------+------------+------------+------------|
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | None |
|-------+-------------+------------+------------+------------|
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | J3 | J5 |
|------------------+--------------------+--------------------|
| 16MHz | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 20MHz | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 25MHz | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+