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# SOYO COMPUTER CO., LTD.
SY-022
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 20/25/33/50(internal)/50/66(internal)MHz
Chip Set SIS
Max. Onboard DRAM 128MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Power LED & | J17 | External battery | J20 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J18 | Turbo switch | J21 |
|-------------------+----------+------------------+----------|
| Reset switch | J19 | Turbo LED | J22 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | Monitor type select monochrome | JP3 | Open |
|---+--------------------------------+--------+--------------|
| | Monitor type select color | JP3 | Closed |
|---+--------------------------------+--------+--------------|
| » | CMOS memory normal operation | JP5 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP5 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
|------------------+--------------------+--------------------|
| 80MB | (4) 4M x 9 | (4) 16M x 9 |
|------------------+--------------------+--------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG | U35 |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (2) 16K x | (1) 16K x |
| | | | 4 | 4 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (2) 16K x | (1) 16K x |
| | | | 4 | 4 |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (2) 16K x | (1) 16K x |
| | | 8 | 4 | 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP15 | JP16 | JP17 | JP18 | JP19 | JP20 |
|--------+--------+--------+--------+--------+-------+-------|
| 64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 3 & 4 |
|--------+--------+--------+--------+--------+-------+-------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 |
|--------+--------+--------+--------+--------+-------+-------|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 4 & 5 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP12 | JP13 | JP14 |
|-----------+-------------------+-------------------+--------|
| 80486SX | pins 2 & 3 closed | Open | Open |
|-----------+-------------------+-------------------+--------|
| 80487SX | pins 1 & 2 closed | pins 2 & 3 closed | Open |
|-----------+-------------------+-------------------+--------|
| 80486DX | pins 1 & 2 closed | pins 1 & 2 closed | Closed |
|-----------+-------------------+-------------------+--------|
| 80486DX2 | pins 1 & 2 closed | pins 1 & 2 closed | Closed |
+------------------------------------------------------------+