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# SILICON STAR INTERNATIONAL, INC.
486 VESA/486 ISA
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set UNI
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI/Award
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Power LED & | JW1 | Reset switch | JW5 |
| keylock | | | |
|---------------+----------+----------------------+----------|
| Speaker | JW2 | External battery | JP16 |
|---------------+----------+----------------------+----------|
| Turbo LED | JW3 | 32-bit VESA local | S1 & S2 |
| | | bus slots | |
|---------------+----------+----------------------+----------|
| Turbo switch | JW4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | JP1 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP2 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP3 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP9 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP10 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select monochrome | JP11 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select color | JP11 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP12 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP14 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP15 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP15 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP17 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP18 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP19 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP20 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP21 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP22 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP23 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP24 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JPX4 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JPX5 | Closed |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Max Cachable | Bank 0 | Bank 1 | TAG |
|-------+--------------+-------------+-------------+---------|
| 64KB | 8MB | (4) 8K x 8 | (4) 8K x 8 | 8K x 8 |
|-------+--------------+-------------+-------------+---------|
| 128KB | 16MB | (4) 32K x 8 | NONE | 8K x 8 |
|-------+--------------+-------------+-------------+---------|
| 256KB | 32MB | (4) 32K x 8 | (4) 32K x 8 | 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JPX10 | JPX20 | JPX30 |
|--------------+---------------+--------------+--------------|
| 64KB | Closed | Open | Open |
|--------------+---------------+--------------+--------------|
| 128KB | Open | Closed | Open |
|--------------+---------------+--------------+--------------|
| 256KB | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP4 | JP28 | JP29 | JP31 | JP32 | JP33 |
|--------+--------+-------+-------+--------+--------+--------|
| 25MHz | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Open | Closed |
|--------+--------+-------+-------+--------+--------+--------|
| 33MHz | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Closed | Open |
|--------+--------+-------+-------+--------+--------+--------|
| 40MHz | 2 & 3 | 2 & 3 | 2 & 3 | Open | Closed | Closed |
|--------+--------+-------+-------+--------+--------+--------|
| 50iMHz | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Open | Closed |
|--------+--------+-------+-------+--------+--------+--------|
| 50MHz | 2 & 3 | 2 & 3 | 2 & 3 | Closed | Open | Closed |
|--------+--------+-------+-------+--------+--------+--------|
| 66iMHz | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Closed | Open |
|------------------------------------------------------------|
| NotePins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| CPU Type | JP5-JP8, JP25 | JPX1 | JPX2 | JPX3 |
|--------------+------------------+--------+--------+--------|
| 80486SX | pins 1 & 2 | Open | Closed | Closed |
| | closed | | | |
|--------------+------------------+--------+--------+--------|
| 80487SX | pins 1 & 2 | Open | Open | Closed |
| | closed | | | |
|--------------+------------------+--------+--------+--------|
| 80486DX, DX2 | pins 1 & 2 | Closed | Open | Open |
| | closed | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Wait States | JP26 | JP27 |
|-----------+---------------+-------------------+------------|
| < 33MHz | O wait states | pins 1 & 2 closed | pins 1 & 2 |
| | | | closed |
|-----------+---------------+-------------------+------------|
| > 33MHz | 1 wait state | pins 2 & 3 closed | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+