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# UNIDENTIFIED
80386SX-C
Processor 80386SX
Processor Speed 16/20/25MHz
Chip Set VLSI
Max. Onboard DRAM 16MB
SRAM Cache None
BIOS AMI
Dimensions 220mm x 180mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Speaker | J5 | External battery | J8 |
|----------------+----------+---------------------+----------|
| Turbo switch | J6 | Power LED & keylock | J10 |
|----------------+----------+---------------------+----------|
| Turbo LED | J7 | Reset switch | J15 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Pipeline mode enabled | JP1 | closed |
|---+----------------------------------+--------+------------|
| | Pipeline mode disabled | JP1 | open |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP6 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP6 | pins 3 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Battery select internal | JP7 | closed |
|---+----------------------------------+--------+------------|
| | Battery select external | JP7 | open |
|---+----------------------------------+--------+------------|
| » | Monitor type select monochrome | JP11 | open |
|---+----------------------------------+--------+------------|
| | Monitor type select color | JP11 | closed |
|---+----------------------------------+--------+------------|
| » | Parity check enabled | JP90 | closed |
|---+----------------------------------+--------+------------|
| | Parity check disabled | JP90 | open |
|---+----------------------------------+--------+------------|
| » | Chipset type select 82C311 | JP91 | open |
|---+----------------------------------+--------+------------|
| » | Chipset type select 82C310 | JP91 | open |
|---+----------------------------------+--------+------------|
| » | Keyboard controller set on pin | SSI | pins 1 & 2 |
| | 23 | | closed |
|---+----------------------------------+--------+------------|
| | Keyboard controller set on pin | SSI | pins 1 & 3 |
| | 27 | | closed |
|---+----------------------------------+--------+------------|
| | Keyboard controller set on pin | SSI | pins 1 & 4 |
| | 30 | | closed |
|---+----------------------------------+--------+------------|
| | Keyboard controller set on pin | SSI | pins 1 & 5 |
| | 32 | | 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 |
|-------+-------------+------------+------------+------------|
| 3MB | (2) 256K x | (2) 256K x | (2) 1M x 9 | NONE |
| | 9 | 9 | | |
|-------+-------------+------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 5MB | (2) 256K x | (2) 256K x | (2) 1M x 9 | (2) 1M x 9 |
| | 9 | 9 | | |
|-------+-------------+------------+------------+------------|
| 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 |
|-------+-------------+------------+------------+------------|
| 8MB | (2) 4M x 9 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 12MB | (2) 1M x 9 | (2) 1M x 9 | (2) 4M x 9 | NONE |
|-------+-------------+------------+------------+------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 | NONE | NONE |
+------------------------------------------------------------+