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# SER
486-VLA
Processor CX486M6/80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set ALI
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 254mm x 218mm
I/O Options 32-bit VESA local bus slots (3)
NPU Options None
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 VESA local | SL1 - |
| | | bus slots | SL3 |
|---------------+----------+----------------------+----------|
| Turbo LED | J4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP21 | JP22 | JP23 | JP24 |
|---------+---------+---------+--------+---------------------|
| 64KB | 1 & 2 | 1 & 2 | Open | 3 & 4 |
|---------+---------+---------+--------+---------------------|
| 128KB | 2 & 3 | 1 & 2 | Open | 1 & 2, 3 & 4, 5 & 6 |
|---------+---------+---------+--------+---------------------|
| 256KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2, 3 & 4, 5 & 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP7 | JP9 | JP11 | JP12 | JP16 |JP17 |JP20 |
|---------+-------+-------+-------+-------+------+-----+-----|
| CX486M6 | 2 & 3 | 2 & 3 | Open | Open |1 & 2 |Open |1 & 2|
|---------+-------+-------+-------+-------+------+-----+-----|
| 80486SX | 1 & 2 | 1 & 2 |Closed |Closed |1 & 2 |Open |1 & 2|
|---------+-------+-------+-------+-------+------+-----+-----|
| 80487SX | 1 & 2 | 1 & 2 |Closed |Closed |2 & 3 |1 & 2|1 & 2|
|---------+-------+-------+-------+-------+------+-----+-----|
| 80486DX | 1 & 2 | 1 & 2 |Closed |Closed |2 & 3 |2 & 3|1 & 2|
|---------+-------+-------+-------+-------+------+-----+-----|
|80486DX2 | 1 & 2 | 1 & 2 |Closed |Closed |2 & 3 |2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP6 | JP10 | JP25 | JP26 |
|-----------+----------+----------+----------------+---------|
| 25MHz | 1 & 2 | 1 & 2 | 3 & 4 | 1 & 2 |
|-----------+----------+----------+----------------+---------|
| 33MHz | 1 & 2 | 1 & 2 | 1 & 2, 5 & 6 | 1 & 2 |
|-----------+----------+----------+----------------+---------|
| 40MHz | 2 & 3 | 2 & 3 | 1 & 2, 3 & 4 | 2 & 3 |
|-----------+----------+----------+----------------+---------|
| 50iMHz | 1 & 2 | 1 & 2 | 3 & 4 | 1 & 2 |
|-----------+----------+----------+----------------+---------|
| 50MHz | 2 & 3 | 2 & 3 | 3 & 4 | 2 & 3 |
|-----------+----------+----------+----------------+---------|
| 66iMHz | 1 & 2 | 1 & 2 | 1 & 2, 5 & 6 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP1 |
|----------------------------+-------------------------------|
| 0 wait states | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 1 wait state | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP2 |
|----------------------------+-------------------------------|
| <= 33MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| > 33MHz | pins 2 & 3 closed |
+------------------------------------------------------------+