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# UNIDENTIFIED
386SX P9
Processor 80386SX
Processor Speed 16MHz
Chip Set OPTI
Max. Onboard DRAM 2MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit external memory card slot
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Reset switch | J1 | Turbo LED | J5 |
|---------------+----------+----------------------+----------|
| Power LED & | J2 | External battery | J6 |
| keylock | | | |
|---------------+----------+----------------------+----------|
| Speaker | J3 | 32-bit external | S1 |
| | | memory card | |
|---------------+----------+----------------------+----------|
| Turbo switch | J4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Turbo LED enabled | JP1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Turbo LED disabled | JP1 | pins 1 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP2 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | NPU mode select synchronous with | JP3 | Open |
| | CPU | | |
|---+----------------------------------+--------+------------|
| | NPU mode select asynchronous | JP3 | Closed |
| | with CPU | | |
|---+----------------------------------+--------+------------|
| » | NPU enabled | JP4 | Closed |
|---+----------------------------------+--------+------------|
| | NPU disabled | JP4 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP5 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP6 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Crystal select OSC2 | JP7 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Crystal select OSC1 | JP7 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J8 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J8 | Open |
|---+----------------------------------+--------+------------|
| » | Power good signal detect from | JP9 | pins 1 & 2 |
| | power supply | | closed |
|---+----------------------------------+--------+------------|
| | Power good signal detect from | JP9 | pins 2 & 3 |
| | board | | closed |
|---+----------------------------------+--------+------------|
| » | BIOS type select 27256 | JP10 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | BIOS type select 27128 | JP10 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+------------+------------+------------+------------|
| 512KB | (4) 44256 | NONE | NONE | NONE |
|--------+------------+------------+------------+------------|
| 1MB | (4) 44256 | (4) 44256 | NONE | NONE |
|--------+------------+------------+------------+------------|
| 1.5MB | (4) 44256 | (4) 44256 | (4) 44256 | NONE |
|--------+------------+------------+------------+------------|
| 2MB | (4) 44256 | (4) 44256 | (4) 44256 | (4) 44256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM PARITY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+------------+------------+------------+------------|
| 512KB | (2) 41256 | NONE | NONE | NONE |
|--------+------------+------------+------------+------------|
| 1MB | (2) 41256 | (2) 41256 | NONE | NONE |
|--------+------------+------------+------------+------------|
| 1.5MB | (2) 41256 | (2) 41256 | (2) 41256 | NONE |
|--------+------------+------------+------------+------------|
| 2MB | (2) 41256 | (2) 41256 | (2) 41256 | (2) 41256 |
+------------------------------------------------------------+