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# UNIDENTIFIED
S 286 SYSTEM BOARD
Processor 80286
Processor Speed 6/10/12/16MHz
Chip Set VLSI
Video Chip Set None
Maximum Onboard Memory 4MB
Maximum Video Memory None
Cache None
BIOS Award/Phoenix
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Speaker | J19 | Turbo switch | JP4 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J20 | Turbo LED | JP5 |
|---------------------+----------+----------------+----------|
| External battery | J21 | Reset switch | JP6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | DSP/2 | On |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | EMS port address select 0E8H - | DSP/4 | On |
| | 0EFH | | |
|---+---------------------------------+-------+--------------|
| | EMS port address select 098H - | DSP/4 | Off |
| | 09FH | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | BIOS type select Phoenix | JP7 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | BIOS type select Award | JP7 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | EMS type select extended mode | JP8 | Open |
|---+---------------------------------+-------+--------------|
| | EMS type select expanded mode | JP8 | Closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP10 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Wait state select 1 wait state | JP11 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Wait state select 0 wait states | JP11 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Monitor type select monochrome | SW1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Monitor type select color | SW1 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (18) 41256 | None |
|------------------+--------------------+--------------------|
| 640KB | (18) 41256 | (18) 4164 |
|------------------+--------------------+--------------------|
| 1MB | (18) 41256 | (18) 41256 |
|------------------+--------------------+--------------------|
| 1MB (EMS) | (18) 41256 | (18) 41256 |
|------------------+--------------------+--------------------|
| 2MB | (18) 411000 | None |
|------------------+--------------------+--------------------|
| 2MB (EMS) | (18) 411000 | None |
|------------------+--------------------+--------------------|
| 4MB | (18) 411000 | (18) 411000 |
|------------------+--------------------+--------------------|
| 4MB (EMS) | (18) 411000 | (18) 411000 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | DSP/6 | DSP/7 | DSP/8 |
|---------------+--------------+--------------+--------------|
| 512KB | On | On | On |
|---------------+--------------+--------------+--------------|
| 640KB | On | On | Off |
|---------------+--------------+--------------+--------------|
| 1MB | On | Off | On |
|---------------+--------------+--------------+--------------|
| 1MB (EMS) | On | Off | Off |
|---------------+--------------+--------------+--------------|
| 2MB | Off | On | On |
|---------------+--------------+--------------+--------------|
| 2MB (EMS) | Off | On | Off |
|---------------+--------------+--------------+--------------|
| 4MB | Off | Off | On |
|---------------+--------------+--------------+--------------|
| 4MB (EMS) | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J18 |
|----------------------------+-------------------------------|
| 256KB | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 512KB | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CLOCK SPEED SELECTION |
|------------------------------------------------------------|
| Speed | DSP/1 | JP1 |
|---------------------+-----------------+--------------------|
| Low | On | Pins 2 & 3 closed |
|---------------------+-----------------+--------------------|
| High | Off | Pins 2 & 3 closed |
|---------------------+-----------------+--------------------|
| Keyboard controlled | N/A | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS SELECTION |
|------------------------------------------------------------|
| Size | JP9 | DSP/5 |
|-------------------+--------------------+-------------------|
| 27128 | Pins 1 & 2 closed | On |
|-------------------+--------------------+-------------------|
| 27256 | Pins 2 & 3 closed | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O WAIT STATE SELECTION |
|------------------------------------------------------------|
| Wait states | DSP/3 | JP3 |
|---------------------+-----------------+--------------------|
| 4 | On | Pins 2 & 3 closed |
|---------------------+-----------------+--------------------|
| 6 | Off | Pins 2 & 3 closed |
|---------------------+-----------------+--------------------|
| Keyboard controlled | N/A | Pins 1 & 2 closed |
+------------------------------------------------------------+