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# UNIDENTIFIED
80486 CACHE SYSTEM
Processor 80486SX/80487SX/80486DX
Processor Speed 25/33/40/50MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit system card
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Speaker | J1 | Turbo switch | J5 |
|------------------+----------+-------------------+----------|
| Power LED & | J2 | External battery | J6 |
| keylock | | | |
|------------------+----------+-------------------+----------|
| Reset switch | J3 | 32-bit system | SL1 |
| | | card | |
|------------------+----------+-------------------+----------|
| Turbo LED | J4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | NPU wait state select 0 wait | JP1 | Open |
| | states | | |
|---+----------------------------------+--------+------------|
| | NPU wait state select 1 wait | JP1 | Closed |
| | state | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP2 | Open |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP2 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP17 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JPA | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JPB | pins 1 & 2 |
| | alter | | 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 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION (TAG) |
|------------------------------------------------------------|
| Size | U15 | U16 | U17 | U18 |
|-------+-------------+------------+------------+------------|
| 64KB | NONE | NONE | (1) 16K x | (1) 8K x 8 |
| | | | 4 | |
|-------+-------------+------------+------------+------------|
| 128KB | NONE | NONE | (1) 16K x | (1) 8K x 8 |
| | | | 4 | |
|-------+-------------+------------+------------+------------|
| 256KB | (1) 16K x 4 | (1) 16K x | (1) 16K x | NONE |
| | | 4 | 4 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP6 | JP7 | JP8 | JP9 |
|---------+----------+---------+---------+-------------------|
| 64KB | Open | Open | Open | Open |
|---------+----------+---------+---------+-------------------|
| 128KB | Closed | Open | Closed | pins 2 & 3 closed |
|---------+----------+---------+---------+-------------------|
| 256KB | Closed | Closed | Closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP3 | JP4 | JP5 |
|----------+---------+-------------------+-------------------|
| 80486SX | Open | pins 1 & 2 closed | Open |
|----------+---------+-------------------+-------------------|
| 80487SX | Closed | pins 2 & 3 closed | pins 1 & 2 closed |
|----------+---------+-------------------+-------------------|
| 80486DX | Closed | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CLOCK SELECT CONFIGURATION |
|------------------------------------------------------------|
| Clock | JP10 | JP11 | JP12 |
|-------------+-------------------+-------------+------------|
| CLK/3 | pins 1 & 2 closed | Closed | Open |
|-------------+-------------------+-------------+------------|
| CLK/4 | pins 1 & 2 closed | Open | Closed |
|-------------+-------------------+-------------+------------|
| ECLK/5 | pins 1 & 2 closed | Open | Open |
|-------------+-------------------+-------------+------------|
| CLK/6 | pins 1 & 2 closed | Closed | Closed |
+------------------------------------------------------------+