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# UNIDENTIFIED
JS-128A
Processor 80286
Processor Speed 12MHz
Chip Set SUNTAC
Max. Onboard DRAM 4MB
SRAM 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 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J20 | Turbo LED | JP8 |
|---------------------+----------+----------------+----------|
| Reset switch | JP6 | Speaker | JP10 |
|---------------------+----------+----------------+----------|
| Turbo switch | JP7 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | CPU speed select fast | DSP1/1 | Off |
|---+---------------------------+---------------+------------|
| | CPU speed select slow | DSP1/1 | On |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | DSP1/2 | On |
|---+---------------------------+---------------+------------|
| | Monitor type select | DSP1/2 | Off |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | DSP1/3 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | CPU speed select fast | DSP1/4 | On |
|---+---------------------------+---------------+------------|
| | EMS port address select | DSP1/4 | Off |
| | 098H | | |
|---+---------------------------+---------------+------------|
| » | CPU speed select fast | DSP1/5 | On |
|---+---------------------------+---------------+------------|
| | BIOS type select 27256 | DSP1/5 | Off |
|---+---------------------------+---------------+------------|
| » | DRAM select 0 wait states | JP5 | closed |
|---+---------------------------+---------------+------------|
| | DRAM select 1 wait state | JP5 | open |
|---+---------------------------+---------------+------------|
| » | CPU speed select fast | JP9 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | CPU speed select | JP9 | pins 2 & 3 |
| | switchable at turbo | | closed |
| | switch | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (18) 41256 | NONE |
|------------------+--------------------+--------------------|
| 640KB | (18) 41256 | (18) 4164 |
|------------------+--------------------+--------------------|
| 1MB | (18) 41256 | (18) 41256 |
|------------------+--------------------+--------------------|
| 1MB w/EMS | (18) 41256 | (18) 41256 |
|------------------+--------------------+--------------------|
| 2MB | (18) 411000 | NONE |
|------------------+--------------------+--------------------|
| 2MB w/EMS | (18) 411000 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (18) 411000 | (18) 411000 |
|------------------+--------------------+--------------------|
| 4MB w/EMS | (18) 411000 | (18) 411000 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | DSP1/6 | DSP1/7 | DSP1/8 |
|---------------+--------------+--------------+--------------|
| 512KB | On | On | On |
|---------------+--------------+--------------+--------------|
| 640KB | On | On | Off |
|---------------+--------------+--------------+--------------|
| 1MB | On | Off | On |
|---------------+--------------+--------------+--------------|
| 1MB w/EMS | On | Off | Off |
|---------------+--------------+--------------+--------------|
| 2MB | Off | On | On |
|---------------+--------------+--------------+--------------|
| 2MB w/EMS | Off | On | Off |
|---------------+--------------+--------------+--------------|
| 4MB | Off | Off | On |
|---------------+--------------+--------------+--------------|
| 4MB w/EMS | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| KEYBOARD CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP3 | JP4 |
|------------+-----------+-----------+-----------+-----------|
| Pin 32 | Closed | Open | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| Pin 27 | Open | Closed | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| Pin 23 | Open | Open | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| Pin 30 | Open | Open | Open | Closed |
+------------------------------------------------------------+