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# UNIDENTIFIED
80486 DX CACHE
Processor 80486SX/80487SX/80486DX
Processor Speed 16/20/25/33MHz
Chip Set Symphony
Max. Onboard DRAM 32MB
SRAM Cache 64/128/256KB
BIOS AMI/DTK
Dimensions 330.2mm x 218.4mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J2 | Reset switch | J5 |
|------------------+----------+-------------------+----------|
| Turbo switch | J3 | Speaker | J6 |
|------------------+----------+-------------------+----------|
| Turbo LED | J4 | Power LED & | J7 |
| | | keylock | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CMOS memory normal operation | JP1 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP1 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select monochrome | JP2 | open |
|---+--------------------------------+--------+--------------|
| | Monitor type select color | JP2 | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU CONFIGURATION |
|------------------------------------------------------------|
| CPU | JP8 | JP9 | JP10 |
|---------+----------------+----------------+----------------|
| 80486DX | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 80486SX | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | 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 |
|------------------+--------------------+--------------------|
| 5MB | (4) 1M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 17MB | (4) 4M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 17MB | (4) 256K x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Jumper | 64KB | 128KB | 256KB |
|--------+-----------------+----------------+----------------|
| JP3 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| JP4 | pins 1 & 2 | open | pins 2 & 3 |
| | closed | | closed |
|--------+-----------------+----------------+----------------|
| JP5 | pins 2 & 3 | open | pins 2 & 3 |
| | closed | | closed |
|--------+-----------------+----------------+----------------|
| JP6 | open | closed | open |
|--------+-----------------+----------------+----------------|
| JP7 | open | closed | open |
|--------+-----------------+----------------+----------------|
| JP11 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| JP12 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| JP13 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| JP14 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| JP15 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| JP16 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| JP17 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| JP18 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 |
|------------------+--------------------+--------------------|
| 128KB | (4) 32K x 8 | NONE |
|------------------+--------------------+--------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 |
+------------------------------------------------------------+