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# UNIDENTIFIED
386SX-25
Processor 80386SX
Processor Speed 25MHz
Chip Set Unidentified
Max. Onboard DRAM 16MB
Cache None
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | JP17 | Turbo switch | JP24 |
|---------------------+----------+----------------+----------|
| Speaker | JP21 | Turbo LED | JP25 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | JP22 | Reset switch | JP26 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | JP16 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP16 | Closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP18 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP18 | Open |
|---+----------------------------------+--------+------------|
| » | Floppy drive current select | JP19 | Closed |
| | (24mA) | | |
|---+----------------------------------+--------+------------|
| | Floppy drive current select | JP19 | Open |
| | (12mA) | | |
|---+----------------------------------+--------+------------|
| » | Pipeline mode enabled | JP20 | Closed |
|---+----------------------------------+--------+------------|
| | Pipeline mode disabled | JP20 | Open |
|---+----------------------------------+--------+------------|
| » | NPU disabled | JP23 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU enabled | JP23 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | P-0 | Bank 1 | P-1 | Bank | Bank |
| | | | | | 2 | 3 |
|-------+---------+---------+---------+--------+------+------|
| 512KB | (4) | (2) | NONE | NONE | NONE | NONE |
| | 44256 | 41256 | | | | |
|-------+---------+---------+---------+--------+------+------|
| 512KB | NONE | NONE | NONE | NONE | (2) | NONE |
| | | | | | 256K | |
| | | | | | x 9 | |
|-------+---------+---------+---------+--------+------+------|
| 1MB | (4) | (2) | (4) | (2) | NONE | NONE |
| | 44256 | 41256 | 44256 | 41256 | | |
|-------+---------+---------+---------+--------+------+------|
| 1MB | NONE | NONE | NONE | NONE | (2) | (2) |
| | | | | | 256K | 256K |
| | | | | | x 9 | x 9 |
|-------+---------+---------+---------+--------+------+------|
| 2MB | (4) | (2) | NONE | NONE | NONE | NONE |
| | 441000 | 411000 | | | | |
|-------+---------+---------+---------+--------+------+------|
| 2MB | NONE | NONE | NONE | NONE | (2) | NONE |
| | | | | | 1M x | |
| | | | | | 9 | |
|-------+---------+---------+---------+--------+------+------|
| 4MB | (4) | (2) | (4) | (2) | NONE | NONE |
| | 441000 | 411000 | 441000 | 411000 | | |
|-------+---------+---------+---------+--------+------+------|
| 4MB | NONE | NONE | NONE | NONE | (2) | (2) |
| | | | | | 1M x | 1M x |
| | | | | | 9 | 9 |
|-------+---------+---------+---------+--------+------+------|
| 8MB | NONE | NONE | NONE | NONE | (2) | NONE |
| | | | | | 4M x | |
| | | | | | 9 | |
|-------+---------+---------+---------+--------+------+------|
| 16MB | NONE | NONE | NONE | NONE | (2) | (2) |
| | | | | | 4M x | 4M x |
| | | | | | 9 | 9 |
+------------------------------------------------------------+