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# UNIDENTIFIED
OPTI 80386 SYSTEM BOARD
Processor 80386DX
Processor Speed 25/33MHz
Chip Set Unidentified
Max. Onboard DRAM 16MB
Cache 32/64KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387SX/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Turbo LED | J14 | Power LED & keylock | J18 |
|----------------+----------+---------------------+----------|
| Reset switch | J16 | Speaker | J19 |
|----------------+----------+---------------------+----------|
| Turbo switch | J17 | Riser Card | S1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select color | J2 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J2 | Open |
|---+----------------------------------+--------+------------|
| » | Battery type select internal | J5 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battery type select external | J5 | pins 1 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Weitek 3167 installed | J6 | Closed |
|---+----------------------------------+--------+------------|
| | Weitek 3167 not installed | J6 | Open |
|---+----------------------------------+--------+------------|
| » | Cache type select pipeline | J7 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Cache type select non-pipeline | J7 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | NPU enabled | J8 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU disabled | J8 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J10 | pins 1 & 2 |
| | alter | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (4) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (4) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (4) 256K x | (4) 256K x | (4) 256K x | NONE |
| | 9 | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 256K x | (4) 256K x | (4) 256K x | (4) 256K x |
| | 9 | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (4) 256K x | (4) 1M x 9 | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 5MB | (4) 1M x 9 | (4) 256K x | NONE | NONE |
| | | 9 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (4) 256K x | (4) 1M x 9 | (4) 256K x | NONE |
| | 9 | | 9 | |
|------+-------------+-------------+------------+------------|
| 6MB | (4) 1M x 9 | (4) 256K x | (4) 256K x | NONE |
| | | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 7MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | (4) 256K x |
| | 9 | 9 | | 9 |
|------+-------------+-------------+------------+------------|
| 7MB | (4) 256K x | (4) 1M x 9 | (4) 256K x | (4) 256K x |
| | 9 | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 7MB | (4) 1M x 9 | (4) 256K x | (4) 256K x | (4) 256K x |
| | | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9MB | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 9MB | (4) 1M x 9 | (4) 1M x 9 | (4) 256K x | NONE |
| | | | 9 | |
|------+-------------+-------------+------------+------------|
| 9MB | (4) 1M x 9 | (4) 256K x | (4) 1M x 9 | NONE |
| | | 9 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 | (4) 256K x |
| | 9 | | | 9 |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 1M x 9 | (4) 1M x 9 | (4) 256K x | (4) 256K x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 1M x 9 | (4) 256K x | (4) 1M x 9 | (4) 256K x |
| | | 9 | | 9 |
|------+-------------+-------------+------------+------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 13MB | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 13MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 256K x |
| | | | | 9 |
|------+-------------+-------------+------------+------------|
| 13MB | (4) 1M x 9 | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 |
| | | 9 | | |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
|------------------------------------------------------------|
| Note: Bank 2 and Bank 3 are on the riser card. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG0 | TAG1 |
|--------+------------+------------+------------+------------|
| 32KB | (4) 8K x 8 | NONE | (3) 8K x 8 | NONE |
|--------+------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (3) 8K x 8 | (1) 8K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTERNAL MEMORY CARD CONFIGURATION |
|------------------------------------------------------------|
| Select | J15 |
|----------------------------+-------------------------------|
| 32KB installed | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 64KB installed | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| Not installed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE SIZE CONFIGURATION |
|------------------------------------------------------------|
| Size | J9 | J13 |
|------------------+--------------------+--------------------|
| 32KB | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 64KB | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CLOCK SELECT CONFIGURATION |
|------------------------------------------------------------|
| Select | J3 | J4 |
|------------------+--------------------+--------------------|
| External | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| Internal | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+