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# SILICON STAR INTERNATIONAL, INC.
486 VESA AG4
Processor CX486SX/80486SX/80487SX/CX486DX/80486DX/80486DX2/Pentium Overdrive
Processor 20/25/33/40(internal)/50(internal)/50/66(internal)/75(internal)/83(internal)/
Speed 100(internal)MHz
Chip Set SIS
Max. 128MB
Onboard
DRAM
Cache 128/256/512KB
BIOS AMI/Award
Dimensions 260mm x 220mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Reset switch | J6 |
|------------------+----------+-------------------+----------|
| Turbo switch | J3 | Power LED & | J7 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Turbo LED | J4 | Green PC | JP45 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Speaker | J5 | 32-bit VESA Local | SL1 - |
| | | bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | J2 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Turbo mode enabled | J3 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Turbo mode disabled | J3 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP16 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP16 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP17 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP17 | Open |
|---+----------------------------------+--------+------------|
| » | Enter break switch | JP19 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Leave break switch | JP19 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP23 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Suspend mode disabled | JP26 | Open |
|---+----------------------------------+--------+------------|
| | Suspend mode enabled | JP26 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP30 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP31 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP42 | Closed |
| | alter | | |
|------------------------------------------------------------|
| Note: The location of JP23 & JP26 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 1MB | NONE | NONE | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 256K x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 2MB | NONE | (1) 256K x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 2MB | NONE | NONE | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 2MB | (4) 256K x 9 | NONE | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 4MB | NONE | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 4MB | NONE | (1) 512K x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 4MB | (4) 1M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 5MB | NONE | (1) 1M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 5MB | (4) 256K x 9 | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 6MB | (4) 1M x 9 | (1) 256K x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 6MB | NONE | (1) 1M x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 6MB | (4) 256K x 9 | (1) 1M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 8MB | (4) 1M x 9 | (1) 512K x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 8MB | NONE | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 8MB | NONE | NONE | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 8MB | (4) 1M x 9 | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 10MB | (4) 256K x 9 | (1) 2M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (4) 1M x 9 | NONE | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | NONE | (1) 2M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | NONE | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (4) 1M x 9 | (1) 2M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (4) 1M x 9 | (1) 1M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 17MB | NONE | (1) 4M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 17MB | (4) 256K x 9 | NONE | (1) 4M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 18MB | (4) 4M x 9 | (1) 256K x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 18MB | NONE | (1) 4M x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 18MB | (4) 256K x 9 | (1) 4M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 20MB | (4) 4M x 9 | (1) 512K x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 20MB | NONE | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (4) 4M x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (4) 1M x 9 | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | NONE | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | NONE | NONE | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (4) 4M x 9 | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (4) 4M x 9 | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | NONE | (1) 8M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (4) 1M x 9 | NONE | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 40MB | (4) 1M x 9 | (1) 8M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | NONE | (1) 8M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | (4) 4M x 9 | NONE | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | NONE | (1) 8M x 36 | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | NONE | NONE | (1) 16M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (4) 4M x 9 | (1) 4M x 36 | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (4) 16M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 64MB | (4) 4M x 9 | (1) 8M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (4) 16M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 65MB | NONE | (1) 16M x 36 | (1) 256K x 36 |
|------------+---------------+---------------+---------------|
| 65MB | (4) 256K x 9 | NONE | (1) 16M x 36 |
|------------+---------------+---------------+---------------|
| 68MB | NONE | (1) 16M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 72MB | (4) 16M x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 72MB | (4) 1M x 9 | (1) 16M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 80MB | NONE | (1) 16M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 80MB | (4) 4M x 9 | NONE | (1) 16M x 36 |
|------------+---------------+---------------+---------------|
| 96MB | (4) 16M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 128MB | NONE | (1) 16M x 36 | (1) 16M x 36 |
|------------+---------------+---------------+---------------|
| 128MB | (4) 16M x 9 | NONE | (1) 16M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Bank 0 | Bank 1 | Bank 2 | JP33 | JP34 | JP35 |
|-----------+-----------+-----------+-------+-------+--------|
| SIMM 1-4 | SIMM 6 | SIMM 5 | Open | 1 & 2 | Open |
| | (S) | (S) | | | |
|-----------+-----------+-----------+-------+-------+--------|
| SIMM 1-4 | SIMM 6 | SIMM 5 | Open | 1 & 2 | Closed |
| | (D) | (S) | | | |
|-----------+-----------+-----------+-------+-------+--------|
| SIMM 1-4 | SIMM 6 | SIMM 5 | 2 & 3 | 1 & 2 | Open |
| | (S) | (D) | | | |
|-----------+-----------+-----------+-------+-------+--------|
| SIMM 6 | SIMM 5 | SIMM 1-4 | 1 & 2 | 2 & 3 | Open |
| (S) | (S) | | | | |
|-----------+-----------+-----------+-------+-------+--------|
| SIMM 6 | SIMM 5 | SIMM 1-4 | 1 & 2 | 2 & 3 | Open |
| (D) | (D) | | | | |
|-----------+-----------+-----------+-------+-------+--------|
| SIMM 6 | SIMM 5 | NONE | 1 & 2 | 2 & 3 | Open |
| (D) | (S) | | | | |
|-----------+-----------+-----------+-------+-------+--------|
| SIMM 6 | SIMM 5 | SIMM 1-4 | 1 & 2 | 2 & 3 | Open |
| (D) | (D) | | | | |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed positon. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Bank 0 | Bank 1 | Bank 2 | JP36 | JP37 | JP38 |
|------------+-----------+-----------+-------+-------+-------|
| SIMM 1-4 | SIMM 6 | SIMM 5 | 2 & 3 | Open | 2 & 3 |
| | (S) | (S) | | | |
|------------+-----------+-----------+-------+-------+-------|
| SIMM 1-4 | SIMM 6 | SIMM 5 | 2 & 3 | 2 & 3 | Open |
| | (D) | (S) | | | |
|------------+-----------+-----------+-------+-------+-------|
| SIMM 1-4 | SIMM 6 | SIMM 5 | 2 & 3 | Open | 2 & 3 |
| | (S) | (D) | | | |
|------------+-----------+-----------+-------+-------+-------|
| SIMM 6 (S) | SIMM 5 | SIMM 1-4 | 1 & 2 | 1 & 2 | 1 & 2 |
| | (S) | | | | |
|------------+-----------+-----------+-------+-------+-------|
| SIMM 6 (D) | SIMM 5 | SIMM 1-4 | 1 & 2 | 1 & 2 | 1 & 2 |
| | (D) | | | | |
|------------+-----------+-----------+-------+-------+-------|
| SIMM 6 (D) | SIMM 5 | NONE | 1 & 2 | 1 & 2 | 1 & 2 |
| | (S) | | | | |
|------------+-----------+-----------+-------+-------+-------|
| SIMM 6 (D) | SIMM 5 | SIMM 1-4 | 1 & 2 | 1 & 2 | 1 & 2 |
| | (D) | | | | |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed positon. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 64K x 8 | NONE | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP4 | JP40 | JP41 |
|----------+----------+----------+---------+--------+--------|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 256KB | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 256KB | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 512KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 512KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP8 | JP9 |JP10 |JP11 | JP12 |JP13| JP14 |JP15 |
|---------+-----+------+-----+-----+-------+----+------+-----|
| CX486SX |2 & 3| Open |2 & 3|Open | 2-3, |Open| 1-2, |2 & 3|
| | | | | | 4-5 | | 3-4 | |
|---------+-----+------+-----+-----+-------+----+------+-----|
| 486SX |2 & 3| Open |2 & 3|Open | Open |Open| Open |Open |
|---------+-----+------+-----+-----+-------+----+------+-----|
| 486SL |1 & 2|Closed|2 & 3|2 & 3| 3 & 4 |Open|2 & 3 |4 & 5|
|---------+-----+------+-----+-----+-------+----+------+-----|
| CX486DX |1 & 2|Closed|2 & 3|2 & 3| 2 & 3 |Open| 1-2, |2 & 3|
| | | | | | | | 3-4 | |
|---------+-----+------+-----+-----+-------+----+------+-----|
|486DX/DX2|1 & 2|Closed|2 & 3|2 & 3| Open |Open| Open |Open |
|---------+-----+------+-----+-----+-------+----+------+-----|
| 486DX4 |1 & 2|Closed|2 & 3|2 & 3| 3 & 4 |Open|2 & 3 |4 & 5|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP21 | JP22 | JP24 | JP25 | JP46 | JP48 | JP50 |
|-----------+------+------+------+------+------+------+------|
| CX486SX | 1 & | 2 & | 2 & | 2 & | 1 & | 2 & | 2 & |
| | 2 | 3 | 3 | 3 | 2 | 3 | 3 |
|-----------+------+------+------+------+------+------+------|
| 486SX | 2 & | 1 & | 1 & | Open | 2 & | 2 & | 2 & |
| | 3 | 2 | 2 | | 3 | 3 | 3 |
|-----------+------+------+------+------+------+------+------|
| 486SL | 2 & | 1 & | Open | Open | 2 & | 2 & | 2 & |
| | 3 | 2 | | | 3 | 3 | 3 |
|-----------+------+------+------+------+------+------+------|
| CX486DX | 1 & | 2 & | 2 & | 2 & | 1 & | 2 & | 2 & |
| | 2 | 3 | 3 | 3 | 2 | 3 | 3 |
|-----------+------+------+------+------+------+------+------|
| 486DX/DX2 | 2 & | 1 & | 1 & | Open | 2 & | 2 & | 2 & |
| | 3 | 2 | 2 | | 3 | 3 | 3 |
|-----------+------+------+------+------+------+------+------|
| 486DX4 | 2 & | 1 & | Open | Open | 2 & | 1 & | 1 & |
| | 3 | 2 | | | 3 | 2 | 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
|Speed | JP5 | JP6 | JP7 | JP20 | JP32 | JP47 |JP49 |JP51 |
|------+------+------+------+------+------+------+-----+-----|
|20MHz |Closed| Open |Closed|1 & 2 |Closed| Open |Open |Open |
|------+------+------+------+------+------+------+-----+-----|
|25MHz |Closed|Closed| Open |1 & 2 |Closed| Open |Open |Open |
|------+------+------+------+------+------+------+-----+-----|
|33MHz | Open |Closed|Closed|1 & 2 |Closed| Open |Open |Open |
|------+------+------+------+------+------+------+-----+-----|
|40MHz |Closed| Open | Open |2 & 3 |Closed| Open |Open |Open |
|------+------+------+------+------+------+------+-----+-----|
|50iMHz|Closed|Closed| Open |1 & 2 |Closed| Open |Open |Open |
|------+------+------+------+------+------+------+-----+-----|
|50MHz | Open | Open |Closed|1 & 2 |Closed| Open |Open |Open |
|------+------+------+------+------+------+------+-----+-----|
|66iMHz| Open |Closed|Closed|1 & 2 |Closed| Open |Open |Open |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (DX4 ONLY) |
|------------------------------------------------------------|
| Speed | JP5 | JP6 | JP7 |JP20 |JP32|JP47 |JP49 | JP51 |
|---------+------+------+------+-----+----+-----+-----+------|
|25/75MHz |Closed|Closed| Open |1 & 2|Open|2 & 3|1 & 2| Open |
|---------+------+------+------+-----+----+-----+-----+------|
|33/83MHz | Open |Closed|Closed|1 & 2|Open|2 & 3|Open |Closed|
|---------+------+------+------+-----+----+-----+-----+------|
|33/100MHz| Open |Closed|Closed|1 & 2|Open|1 & 2|1 & 2| Open |
|---------+------+------+------+-----+----+-----+-----+------|
|50/100MHz| Open | Open |Closed|1 & 2|Open|1 & 2|2 & 3| Open |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP28 |
|----------------------------+-------------------------------|
| 0 wait states | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 1 wait state | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP29 |
|----------------------------+-------------------------------|
| < = 33MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| > 33MHz | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| GREEN PC CONFIGURATION |
|------------------------------------------------------------|
| Description | JP45 |
|-------------------------------+----------------------------|
| Control video HSYNC | pin 1 |
|-------------------------------+----------------------------|
| Ground | pin 2 |
|-------------------------------+----------------------------|
| Control video VSYNC | pin 3 |
|-------------------------------+----------------------------|
| Ground | pin 4 |
|-------------------------------+----------------------------|
| Control ENVIDEO | pin 5 |
|-------------------------------+----------------------------|
| Ground | pin 6 |
|-------------------------------+----------------------------|
| Monitor AC power | pin 7 |
|-------------------------------+----------------------------|
| Ground | pin 8 |
+------------------------------------------------------------+