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# UNIDENTIFIED
80386 SX/16/20
Processor 80386SX
Processor Speed 16/20MHz
Chip Set C & T NEAT
Max. Onboard DRAM 8MB
Cache None
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Reset switch | JP1 | Turbo switch | JP4 |
|-------------------+----------+------------------+----------|
| Power LED & | JP2 | Turbo LED | JP5 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | JP3 | External battery | JP6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | NPU mode select synchronous with | JP8 | Closed |
| | CPU | | |
|---+------------------------------------+--------+----------|
| | NPU mode select asynchronous with | JP8 | Open |
| | CPU | | |
|---+------------------------------------+--------+----------|
| » | NPU disabled | JP9 | Closed |
|---+------------------------------------+--------+----------|
| | NPU enabled | JP9 | Open |
|---+------------------------------------+--------+----------|
| » | Pipeline mode enabled | JP10 | Closed |
|---+------------------------------------+--------+----------|
| | Pipeline mode disabled | JP10 | Open |
|---+------------------------------------+--------+----------|
| » | Monitor type select color | JP11 | Closed |
|---+------------------------------------+--------+----------|
| | Monitor type select monochrome | JP11 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+------------+------------+------------+------------|
| 512KB | (18) 41256 | NONE | NONE | NONE |
|--------+------------+------------+------------+------------|
| 512KB | NONE | NONE | (2) 256K x | NONE |
| | | | 9 | |
|--------+------------+------------+------------+------------|
| 640KB | (18) 41256 | (18) 4164 | NONE | NONE |
|--------+------------+------------+------------+------------|
| 640KB | NONE | NONE | (2) 256K x | (2) 64K x |
| | | | 9 | 9 |
|--------+------------+------------+------------+------------|
| 1MB | (18) 41256 | (18) 41256 | NONE | NONE |
|--------+------------+------------+------------+------------|
| 1MB | NONE | NONE | (2) 256K x | (2) 256K x |
| | | | 9 | 9 |
|--------+------------+------------+------------+------------|
| 1.5MB | (18) 41256 | (18) 41256 | (2) 256K x | NONE |
| | | | 9 | |
|--------+------------+------------+------------+------------|
| 1.64MB | (18) 41256 | (18) 4164 | (2) 256K x | (2) 256K x |
| | | | 9 | 9 |
|--------+------------+------------+------------+------------|
| 2MB | (18) 41256 | (18) 41256 | (2) 256K x | (2) 256K x |
| | | | 9 | 9 |
|--------+------------+------------+------------+------------|
| 2MB | (18) | NONE | NONE | NONE |
| | 411000 | | | |
|--------+------------+------------+------------+------------|
| 2MB | NONE | NONE | (2) 1M x 9 | NONE |
|--------+------------+------------+------------+------------|
| 3MB | (18) 41256 | (18) 41256 | (2) 1M x 9 | NONE |
|--------+------------+------------+------------+------------|
| 4MB | (18) | (18) | NONE | NONE |
| | 411000 | 411000 | | |
|--------+------------+------------+------------+------------|
| 4MB | NONE | NONE | (2) 1M x 9 | (2) 1M x 9 |
|--------+------------+------------+------------+------------|
| 4.64MB | (18) 41256 | (18) 4164 | (2) 1M x 9 | (2) 1M x 9 |
|--------+------------+------------+------------+------------|
| 5MB | (18) 41256 | (18) 41256 | (2) 1M x 9 | (2) 1M x 9 |
|--------+------------+------------+------------+------------|
| 6MB | (18) | (18) | (2) 1M x 9 | NONE |
| | 411000 | 411000 | | |
|--------+------------+------------+------------+------------|
| 8MB | (18) | (18) | (2) 1M x 9 | (2) 1M x 9 |
| | 411000 | 411000 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP12 |
|--------+---------------------------------------------------|
| 512KB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 512KB | pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and |
| | 17 & 18 closed |
|--------+---------------------------------------------------|
| 640KB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 640KB | pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and |
| | 17 & 18 closed |
|--------+---------------------------------------------------|
| 1MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 1MB | pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and |
| | 17 & 18 closed |
|--------+---------------------------------------------------|
| 1.5MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 1.64MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 2MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 2MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 2MB | pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and |
| | 17 & 18 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | JP12 |
|--------+---------------------------------------------------|
| 3MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 4MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 4MB | pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and |
| | 17 & 18 closed |
|--------+---------------------------------------------------|
| 4.64MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 5MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
|--------+---------------------------------------------------|
| 6MB | pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, and |
| | 17 & 18 closed |
|--------+---------------------------------------------------|
| 8MB | pins 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, and |
| | 16 & 17 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BATTERY CONFIGURATION |
|------------------------------------------------------------|
| Type | JP6 | JP7 |
|------------------+--------------------+--------------------|
| Internal | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| External | Closed | pins 1 & 2 closed |
+------------------------------------------------------------+