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# SILICON STAR INTERNATIONAL, INC.
PI4/PI4T PCI
Processor 80486SX/SL80486SX/CX486M7/AM486DX/AM486DXL PLUS/80486DX/
SL80486DX2/AM486DX2/80486DX2/AM486DX4/80486DX4/P24D/Pentium
Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed 100(internal)MHz
Chip Set Unidentified
Max. 128MB
Onboard
DRAM
Cache 128/256/512/1024KB
BIOS AMI/Award
Dimensions 330mm x 218mm
I/O 32-bit PCI bus slots (3), green PC connector, IDE interfaces (2)
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | J3 | Speaker | J10 |
|---------------------+----------+----------------+----------|
| IDE interface | J4 | Power LED & | J11 |
| (primary) | | keylock | |
|---------------------+----------+----------------+----------|
| IDE interface | J5 | IDE interface | JP10 |
| (secondary) | | LED | |
|---------------------+----------+----------------+----------|
| Green PC connector | J6 | IDE interface | JP11 |
| | | LED | |
|---------------------+----------+----------------+----------|
| Turbo LED | J7 | Green PC | JP38 |
| | | connector | |
|---------------------+----------+----------------+----------|
| Reset switch | J8 | 32-bit PCI bus | SL1 - |
| | | slots | SL3 |
|---------------------+----------+----------------+----------|
| Turbo switch | J9 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CX486S2 CPU not installed | JP1 | Open |
|---+--------------------------------+--------+--------------|
| | CX486S2 CPU installed | JP1 | Closed |
|---+--------------------------------+--------+--------------|
| » | Cache type select write back | JP2 | pins 1 & 2 |
| | (P24D only) | | closed |
|---+--------------------------------+--------+--------------|
| | Cache type select write | JP2 | pins 2 & 3 |
| | through (P24D only) | | closed |
|---+--------------------------------+--------+--------------|
| » | Cache type select write back | JP3 | pins 1 & 2 |
| | (P24T only) | | closed |
|---+--------------------------------+--------+--------------|
| | Cache type select write | JP3 | pins 2 & 3 |
| | through (P24T only) | | closed |
|---+--------------------------------+--------+--------------|
| » | Primary IDE IRQ14 enabled | JP12 | Closed |
|---+--------------------------------+--------+--------------|
| | Primary IDE IRQ14 disabled | JP12 | Open |
|---+--------------------------------+--------+--------------|
| » | Secondary IDE IRQ15 enabled | JP13 | Closed |
|---+--------------------------------+--------+--------------|
| | Secondary IDE IRQ15 disabled | JP13 | Open |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP14 | pins 2 & 3 |
| | alter | | closed |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP26 | pins 2 & 3 |
| | alter | | closed |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP27 | pins 2 & 3 |
| | alter | | closed |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP28 | pins 2 & 3, |
| | alter | | 4 & 5 closed |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP40 | pins 1 & 2 |
| | alter | | closed |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP43 | pins 2 & 3 |
| | alter | | closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select color | JP44 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | JP44 | Open |
|------------------------------------------------------------|
| Note: The location of the factory configured jumpers is |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 512K x | (1) 512K x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 4M x 36 | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 512K x | (1) 512K x | (1) 4M x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 512K x | (1) 512K x | (1) 1M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 512K x | (1) 512K x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 16M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 65MB | (1) 256K x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 16M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 16M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 32K 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 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 64K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP23 | JP24 | JP25 | JP36 | JP37 |
|---------+---------+---------+-------+-------+--------------|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2, 3 & 4 |
|---------+---------+---------+-------+-------+--------------|
| 256KB | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3, 4 & 5 |
|---------+---------+---------+-------+-------+--------------|
| 256KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2, 3 & 4 |
|---------+---------+---------+-------+-------+--------------|
| 512KB | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3, 4 & 5 |
|---------+---------+---------+-------+-------+--------------|
| 512KB | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2, 3 & 4 |
|---------+---------+---------+-------+-------+--------------|
| 1MB | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3, 4 & 5 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP4 | JP7 | JP8 | JP9 | JP15 |
|-----------------+--------+--------+-------+--------+-------|
| 80486SX | 1 & 2, | Open | Open | 2 & 3 | Open |
| | 3 & 4 | | | | |
|-----------------+--------+--------+-------+--------+-------|
| SL80486SX | 1 & 2, | 3 & 4 | Open | 2 & 3 | Open |
| | 3 & 4 | | | | |
|-----------------+--------+--------+-------+--------+-------|
| CX486M7 (3v) | Open | 2 & 3 | 2 & 3 | 1 & 2, | 3 & 4 |
| | | | | 3 & 4 | |
|-----------------+--------+--------+-------+--------+-------|
| CX486M7 (5v) | 1 & 2, | 2 & 3 | 2 & 3 | 1 & 2, | 3 & 4 |
| | 3 & 4 | | | 3 & 4 | |
|-----------------+--------+--------+-------+--------+-------|
| AM486DX/DX2 | 1 & 2, | Open | Open | 1 & 2, | 3 & 4 |
| (5v) | 3 & 4 | | | 3 & 4 | |
|-----------------+--------+--------+-------+--------+-------|
| AM486DX2/DX4 | Open | Open | Open | 1 & 2, | 3 & 4 |
| (3v) | | | | 3 & 4 | |
|-----------------+--------+--------+-------+--------+-------|
| AM486DXL PLUS | 1 & 2, | 3 & 4 | Open | 1 & 2, | 3 & 4 |
| | 3 & 4 | | | 3 & 4 | |
|-----------------+--------+--------+-------+--------+-------|
| 80486DX/DX2 | 1 & 2, | Open | Open | 1 & 2, | 3 & 4 |
| | 3 & 4 | | | 3 & 4 | |
|-----------------+--------+--------+-------+--------+-------|
| SL80486DX/DX2 | 1 & 2, | 3 & 4 | Open | 1 & 2, | 3 & 4 |
| | 3 & 4 | | | 3 & 4 | |
|-----------------+--------+--------+-------+--------+-------|
| 80486DX4 | Open | 3 & 4 | Open | 1 & 2, | 3 & 4 |
| | | | | 3 & 4 | |
|-----------------+--------+--------+-------+--------+-------|
| P24D | 1 & 2, | 1 & 2, | Open | 1 & 2, | 3 & 4 |
| | 3 & 4 | 3 & 4 | | 3 & 4 | |
|-----------------+--------+--------+-------+--------+-------|
| P24T | 1 & 2, | 3 & 4 | 1 & 2 | 1 & 2, | 2 & 3 |
| | 3 & 4 | | | 3 & 4 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP16 | JP17 | JP18 | JP19 |
|---------------------+---------+---------+---------+--------|
| 80486SX | 2 & 3 | Open | Open | Open |
|---------------------+---------+---------+---------+--------|
| SL80486SX | 2 & 3 | Open | 1 & 2 | Open |
|---------------------+---------+---------+---------+--------|
| CX486M7 (3v) | 1 & 2 | Open | 1 & 2 | Open |
|---------------------+---------+---------+---------+--------|
| CX486M7 (5v) | 1 & 2 | Open | 1 & 2 | Open |
|---------------------+---------+---------+---------+--------|
| AM486DX/DX2 (5v) | Open | Open | Open | Open |
|---------------------+---------+---------+---------+--------|
| AM486DX2/DX4 (3v) | Open | Open | Open | Open |
|---------------------+---------+---------+---------+--------|
| AM486DXL PLUS | 2 & 3 | Open | 1 & 2 | 2 & 3 |
|---------------------+---------+---------+---------+--------|
| 80486DX/DX2 | 2 & 3 | Open | Open | Open |
|---------------------+---------+---------+---------+--------|
| SL80486DX/DX2 | 2 & 3 | Open | 1 & 2 | Open |
|---------------------+---------+---------+---------+--------|
| 80486DX4 | 2 & 3 | Open | 1 & 2 | Open |
|---------------------+---------+---------+---------+--------|
| P24D | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| P24T | 1 & 2 | 1 & 2 | 1 & 2 | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP20 | JP21 | JP22 | JP39 |
|---------------------+---------+---------+---------+--------|
| 80486SX | Open | Open | Open | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| SL80486SX | 2 & 3 | 1 & 2 | 4 & 5 | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| CX486M7 (3v) | 1 & 2 | Open | 2 & 3 | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| CX486M7 (5v) | 1 & 2 | Open | 2 & 3 | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| AM486DX/DX2 (5v) | Open | Open | Open | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| AM486DX2/DX4 (3v) | Open | Open | Open | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| AM486DXL PLUS | 2 & 3 | 4 & 5 | 4 & 5 | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| 80486DX/DX2 | Open | Open | Open | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| SL80486DX/DX2 | 2 & 3 | 1 & 2 | 4 & 5 | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| 80486DX4 | 2 & 3 | 1 & 2 | 4 & 5 | Open |
|---------------------+---------+---------+---------+--------|
| P24D | 2 & 3 | 2 & 3 | 4 & 5 | 1 & 2 |
|---------------------+---------+---------+---------+--------|
| P24T | 2 & 3 | Open | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP46 | JP47 | JP48 | JP49 | JP50 |
|--------------+---------+--------+--------+--------+--------|
| AM486DX2 | Open | Closed | Open | Closed | Closed |
|--------------+---------+--------+--------+--------+--------|
| CX486DX2-50 | Closed | Open | Open | Open | Open |
|--------------+---------+--------+--------+--------+--------|
| CX486DX2-66 | Open | Open | Closed | Open | Open |
|--------------+---------+--------+--------+--------+--------|
| CX486DX2-80 | Open | Open | Open | Closed | Open |
|--------------+---------+--------+--------+--------+--------|
| AM486DX/DX4 | Open | Closed | Open | Closed | Open |
|--------------+---------+--------+--------+--------+--------|
| 80486DX4-75 | Closed | Open | Open | Open | Open |
|--------------+---------+--------+--------+--------+--------|
| 80486DX4-100 | Open | Closed | Open | Closed | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
| These settings used only if JP4 is open. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP30 | JP31 | JP32 | JP33 |
|-----------+--------+---------+---------+-------------------|
| 25MHz | Open | Open | Open | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 33MHz | Open | Closed | Closed | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 40MHz | Open | Open | Closed | pins 2 & 3 closed |
|-----------+--------+---------+---------+-------------------|
| 50iMHz | Open | Open | Open | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 50MHz | Open | Closed | Open | pins 2 & 3 closed |
|-----------+--------+---------+---------+-------------------|
| 66iMHz | Open | Closed | Closed | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 75iMHz | Open | Open | Open | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 80iMHz | Open | Open | Closed | pins 2 & 3 closed |
|-----------+--------+---------+---------+-------------------|
| 100iMHz | Open | Closed | Closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CMOS DISCHARGE CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP6 | JP35 |
|--------------------+-------------------+-------------------|
| CMOS memory normal | pins 1 & 2 closed | pins 1 & 2 closed |
| operation | | |
|--------------------+-------------------+-------------------|
| CMOS memory clear | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+