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# IBM CORPORATION
486SLC2 VESA
Processor 486SLC2
Processor Speed 50(internal)/66(internal)MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard Memory 16MB
Maximum Video Memory None
Cache 64/128/256KB
BIOS Award
Dimensions 254mm x 218mm
I/O Options 32-bit VESA local bus slots (3)
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J4 | Speaker | J8 |
|------------------+----------+-------------------+----------|
| Turbo LED | J5 | Power LED & | J9 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Turbo switch | J6 | Chassis fan power | JP9 |
|------------------+----------+-------------------+----------|
| Reset switch | J7 | 32-bit VESA local | SL1 – |
| | | bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| » | Monitor type select color/EGA/VGA | JP10 | Closed |
|---+-----------------------------------+-------+------------|
| | Monitor type select monochrome | JP10 | Open |
|---+-----------------------------------+-------+------------|
| | Battery type select internal | JP11 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Battery type select external | JP11 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | CPU memory read/write delay | JP700 | Pins 1 & 2 |
| | enabled | | closed |
|---+-----------------------------------+-------+------------|
| | CPU memory read/write delay | JP700 | Pins 2 & 3 |
| | disabled | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM 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 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | None | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP12 | JP13 | JP14 | JP15 | JP16 |
|----------+----------+----------+---------+--------+--------|
| 64KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | JP11 | JP17 | JP702 | JP703 |
|-----------+------------+-----------+-----------+-----------|
| 64KB | Open | Open | Open | Open |
|-----------+------------+-----------+-----------+-----------|
| 128KB | Closed | Open | Closed | Closed |
|-----------+------------+-----------+-----------+-----------|
| 256KB | Open | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP1 | JP2 | JP3 | JP4 | JP5 | JP704 |
|--------+--------+--------+-------+--------+--------+-------|
| 50iMHz | Closed | Open | Open | Closed | 2 & 3 | 1 & 2 |
|--------+--------+--------+-------+--------+--------+-------|
| 66iMHz | Closed | Closed | Open | Open | 2 & 3 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU ADS DELAY SELECTION |
|------------------------------------------------------------|
| Setting | JP201 | JP701 |
|----------------------+----------------+--------------------|
| » | Enabled | Closed | Pins 1 & 2 closed |
|---+------------------+----------------+--------------------|
| | Disabled | Open | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE SELECTION |
|------------------------------------------------------------|
| Setting | JP18 |
|----------------------------+-------------------------------|
| » | 0 | Pins 1 & 2 closed |
|----+-----------------------+-------------------------------|
| | 1 | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP19 |
|----------------------------+-------------------------------|
| <= 33MHz | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| >33 MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCAL BUS CLOCK DELAY SELECTION |
|------------------------------------------------------------|
| Setting | JP7 | JP8 |
|--------------------+-------------------+-------------------|
| » | No delay | Pins 1 & 2 closed | Pins 1 & 2 closed |
|---+----------------+-------------------+-------------------|
| | One gate delay | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+