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# UNIDENTIFIED
STM S286
Processor 80286
Processor Speed 6/8MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard Memory 640KB
Maximum Video Memory None
Cache None
BIOS Award
Dimensions 330mm x 300mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Speaker | J19 | External battery | J21 |
|------------------+----------+-------------------+----------|
| Power LED & | J20 | Chassis fan power | J101 |
| keylock | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| ยป | Factory configured - do not | J17 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Monitor type select color | J100 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Monitor type select monochrome | J100 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 640KB | (18) 41256 | (18) 4164 |
|------------------------------------------------------------|
| Note: The location of banks 0 & 1 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | J102 |
|------------------------------+-----------------------------|
| 6MHz | Closed |
|------------------------------+-----------------------------|
| 8MHz | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | J103 |
|----------------------------+-------------------------------|
| 4.77MHz | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 8MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS SELECTION |
|------------------------------------------------------------|
| Type | J18 |
|----------------------------+-------------------------------|
| 27128 | Pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| 27256 | Pins 5 & 6, 7 & 8 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| Note: This board has 6 16-bit slots and 2 8-bit slots. |
+------------------------------------------------------------+