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# UNIDENTIFIED
386SX SYSTEM
Processor 80386SX
Processor Speed 16/25MHz
Chip Set Headland
Video Chip Set Trident
Maximum Onboard 6MB
Memory
Maximum Video 1MB
Memory
Cache None
BIOS Phoenix
Dimensions 396mm x 368mm
I/O Options Floppy drive interface, game port, IDE
interface, parallel port, serial ports (2),
VGA port, riser slot, modem/fax interface
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Game port | CN1 | Modem/fax interface | J25 |
|----------------+----------+---------------------+----------|
| VGA port | CN2 | IDE interface | J27 |
|----------------+----------+---------------------+----------|
| Parallel port | CN3 | IDE interface LED | J28 |
|----------------+----------+---------------------+----------|
| Serial port 2 | CN4 | Floppy drive | J29 |
| | | interface LED | |
|----------------+----------+---------------------+----------|
| Serial port 1 | CN5 | Power LED | J30 |
|----------------+----------+---------------------+----------|
| Chassis fan | J14 | Floppy drive | J31 |
| power | | interface | |
|----------------+----------+---------------------+----------|
| Reset switch | J17 | Riser slot | SL1 |
|----------------+----------+---------------------+----------|
| Speaker | J21 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|--------------------------------------+-------+-------------|
| | Game port enabled | J6 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Game port disabled | J6 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Serial port 2 enabled | J8 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Serial port 2 disabled | J8 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Parallel port enabled | J9 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Parallel port disabled | J9 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Serial port 2 address select 2F8 | J10 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Serial port 2 address select 2E8 | J10 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Parallel port address select 378 | J11 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Parallel port address select 278 | J11 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Serial port 1 enabled | J12 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Serial port 1 disabled | J12 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Serial port 1 address select 3F8 | J13 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Serial port 1 address select 3E8 | J13 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Monitor type select color | J15 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Monitor type select monochrome | J15 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Video mode select interlaced | J18 | Closed |
|---+----------------------------------+-------+-------------|
| | Video mode select non interlaced | J18 | Open |
|---+----------------------------------+-------+-------------|
| | NPU synchronous with CPU | J20 | Open |
|---+----------------------------------+-------+-------------|
| | NPU asynchronous with CPU | J20 | Closed |
|---+----------------------------------+-------+-------------|
| | IDE interface enabled | J23 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | IDE interface disabled | J23 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Floppy drive interface enabled | J24 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+-------+-------------|
| | Floppy drive interface disabled | J24 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|----------+-----------+-----------+-------------+-----------|
| 1MB | 512KB | 512KB | None | None |
|----------+-----------+-----------+-------------+-----------|
| 1.5MB | 512KB | 512KB | (2) 256K x | None |
| | | | 9 | |
|----------+-----------+-----------+-------------+-----------|
| 2MB | 512KB | 512KB | (2) 256K x | (2) 256K |
| | | | 9 | x 9 |
|----------+-----------+-----------+-------------+-----------|
| 3MB | 512KB | 512KB | (2) 1M x 9 | None |
|----------+-----------+-----------+-------------+-----------|
| 5MB | 512KB | 512KB | (2) 1M x 9 | (2) 1M x |
| | | | | 9 |
|----------+-----------+-----------+-------------+-----------|
| 3MB | 1MB | None | (2) 256K x | (2) 256K |
| | | | 9 | x 9 |
|----------+-----------+-----------+-------------+-----------|
| 4MB | 1MB | None | (2) 1M x 9 | None |
|----------+-----------+-----------+-------------+-----------|
| 6MB | 1MB | None | (2) 1M x 9 | (2) 1M x |
| | | | | 9 |
|------------------------------------------------------------|
| Note: Bank 0 or banks 0 & 1 are factory installed and is |
| not configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+------------+------------+------------+------------|
| 256KB | (2) 44256 | None | None | None |
|--------+------------+------------+------------+------------|
| 512KB | (2) 44256 | (2) 44256 | None | None |
|--------+------------+------------+------------+------------|
| 1MB | (2) 44256 | (2) 44256 | (2) 44256 | (2) 44256 |
+------------------------------------------------------------+