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# IBM CORPORATION
OPAL 486SLC2 REV C
Processor CX486SLC2
Processor Speed 50(internal)/66(internal)MHz
Chip Set IBM
Max. Onboard DRAM 16MB
Cache 64/128KB
BIOS AMI/MR
Dimensions 254mm x 218mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Reset switch | J1 | Turbo switch | J4 |
|---------------+----------+----------------------+----------|
| Speaker | J2 | External battery | J25 |
|---------------+----------+----------------------+----------|
| Power LED & | J3 | 32-bit VESA local | SL1 & |
| keylock | | bus slots | SL2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | JP9 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP9 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Password enabled(MR BIOS only) | JP10 | Closed |
|---+----------------------------------+--------+------------|
| | Password disabled (MR BIOS only) | JP10 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (2) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (2) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (2) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 10MB | (2) 1M x 9 | (2) 4M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (2) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (2) 32K x 8 | (2) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP6 |
|----------------------------+-------------------------------|
| 64KB | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 128KB | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP7 | JP8 |
|--------------------+-------------------+-------------------|
| 50iMHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 66iMHz | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP5 |
|-------------------------------+----------------------------|
| <=33MHz | Open |
|-------------------------------+----------------------------|
| >33MHz | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA ID CONFIGURATION |
|------------------------------------------------------------|
| ID | JP1 | JP2 | JP3 | JP4 |
|---------+------------+------------+------------+-----------|
| ID0 | Open | Open | Open | Closed |
|---------+------------+------------+------------+-----------|
| ID1 | Closed | Closed | Open | Closed |
|---------+------------+------------+------------+-----------|
| ID2 | Closed | Open | Closed | Closed |
|---------+------------+------------+------------+-----------|
| ID3 | Open | Closed | Closed | Closed |
+------------------------------------------------------------+