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# UNIDENTIFIED
SUNTAC 286-12
Processor 80286
Processor Speed 12MHz
Chip Set Suntac
Max. Onboard DRAM 4MB
Cache None
BIOS AMI/Award/ERSO/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 |
|-----------------------+----------+--------------+----------|
| External EMS | JP2 | | |
| selection | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Internal battery switch | BS | N/A |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J18 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Keyboard BIOS type select | JP7 | pins 2 & 3 |
| | Award | | closed |
|---+---------------------------+---------------+------------|
| | Keyboard BIOS type select | JP7 | pins 1 & 2 |
| | Phoenix | | closed |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | SW1 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Monitor type select | SW1 | pins 1 & 2 |
| | monochrome | | closed |
|---+---------------------------+---------------+------------|
| | EMS port address select | SW2/4 | Off |
| | 0E8H- 0EFH | | |
|---+---------------------------+---------------+------------|
| | EMS port address select | SW2/4 | On |
| | 098H- 09FH | | |
|------------------------------------------------------------|
| Note: The location of JP7 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------------+-------------------+-------------------|
| 512KB | (18) 41256 | NONE |
|--------------------+-------------------+-------------------|
| 640KB | (18) 41256 | (18) 4164 |
|--------------------+-------------------+-------------------|
| 1MB | (18) 41256 | (18) 41256 |
|--------------------+-------------------+-------------------|
| 640KB+EMS (384KB) | (18) 41256 | (18) 41256 |
|--------------------+-------------------+-------------------|
| 2MB | (18) 411000 | NONE |
|--------------------+-------------------+-------------------|
| 640KB+EMS (1408KB) | (18) 411000 | NONE |
|--------------------+-------------------+-------------------|
| 4MB | (18) 411000 | (18) 411000 |
|--------------------+-------------------+-------------------|
| 640KB+EMS (3456KB) | (18) 411000 | (18) 411000 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW2/6 | SW2/7 | SW2/8 |
|--------------------+-------------+------------+------------|
| 512KB | On | On | On |
|--------------------+-------------+------------+------------|
| 640KB | On | On | Off |
|--------------------+-------------+------------+------------|
| 1MB | On | Off | On |
|--------------------+-------------+------------+------------|
| 640KB+EMS (384KB) | On | Off | Off |
|--------------------+-------------+------------+------------|
| 2MB | Off | On | On |
|--------------------+-------------+------------+------------|
| 640KB+EMS (1408KB) | Off | On | Off |
|--------------------+-------------+------------+------------|
| 4MB | Off | Off | On |
|--------------------+-------------+------------+------------|
| 640KB+EMS (3456KB) | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP1 | JP4 | SW2/1 |
|-----------------------------+------------+--------+--------|
| CPU speed forced high | pins 2 & 3 | N/A | Off |
| | closed | | |
|-----------------------------+------------+--------+--------|
| CPU speed forced low | pins 2 & 3 | N/A | On |
| | closed | | |
|-----------------------------+------------+--------+--------|
| CPU speed forced high | pins 1 & 2 | Closed | N/A |
| | closed | | |
|-----------------------------+------------+--------+--------|
| CPU speed selectable at | pins 1 & 2 | Open | Closed |
| keyboard | closed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait state | JP1 | JP3 | SW2/3 |
|------------+-------------------+-------------------+-------|
| 4 | pins 2 & 3 closed | pins 2 & 3 closed | On |
|------------+-------------------+-------------------+-------|
| 6 | pins 2 & 3 closed | pins 2 & 3 closed | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS CONFIGURATION |
|------------------------------------------------------------|
| Type | JP9 | SW2/5 |
|---------------------+--------------------+-----------------|
| » | 27256 | pins 2 & 3 closed | On |
|---+-----------------+--------------------+-----------------|
| | 27128 | pins 1 & 2 closed | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EMS TOGGLE CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP2 | SW2/8 |
|--------------------+--------------------+------------------|
| On | Closed | Off |
|--------------------+--------------------+------------------|
| Off | Open | On |
+------------------------------------------------------------+