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# UNIDENTIFIED
486S
Processor 80486SX
Processor Speed 25MHz
Chip Set OPTI
Max. Onboard DRAM 8MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-Bit external DRAM/SRAM card slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Reset switch 2 | J12 |
|------------------+----------+-------------------+----------|
| Power LED & | J10 | Reset switch 1 | J13 |
| keylock | | | |
|------------------+----------+-------------------+----------|
| Speaker | J11 | 32-Bit external | S1 |
| | | DRAM/SRAM card | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|-------------------------------------+---------+------------|
| » | CMOS memory normal operation | J2 | pins 1 & 2 |
| | | | closed |
|---+---------------------------------+---------+------------|
| | CMOS memory clear | J2 | pins 2 & 3 |
| | | | closed |
|---+---------------------------------+---------+------------|
| » | Monitor type select color | J3 | Closed |
|---+---------------------------------+---------+------------|
| | Monitor type select monochrome | J3 | Open |
|---+---------------------------------+---------+------------|
| » | Reset select J13 (Reset 1) | J5 | pins 1 & 2 |
| | | | closed |
|---+---------------------------------+---------+------------|
| | Reset select J12 (Reset 2) | J5 | pins 2 & 3 |
| | | | closed |
|---+---------------------------------+---------+------------|
| » | Factory configured - do not | J6 | pins 1 & 2 |
| | alter | | closed |
|------------------------------------------------------------|
| Note:Consult documentation provided with memory card for |
| configurations. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Setting | J8 | J9 |
|--------------------+-------------------+-------------------|
| Not installed | Closed | Closed |
|--------------------+-------------------+-------------------|
| Installed | Open | Open |
+------------------------------------------------------------+