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# UNIDENTIFIED
SA-486 VL-BUS M.B. REV. V2C
Processor CX486SX/80486SX/80487SX/AMD486DXLV/CX486DX/80486DX/80486DX2/
80486DX4/Pentium Overdrive
Processor 20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set ALI
Max. 128MB
Onboard
DRAM
Cache 128/256/512/1024KB
BIOS Phoenix
Dimensions 254mm x 220mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Power LED & | CN1 | Green PC | JG7 |
| keylock | | connector | |
|-------------------+----------+------------------+----------|
| Speaker | CN2 | Green PC | JG8 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Reset switch | CN3 | Green PC | JG9 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Turbo switch | CN4 | Green PC | JG10 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Turbo LED | CN5 | Green PC | JG11 |
| | | connector | |
|-------------------+----------+------------------+----------|
| External battery | CN6 | 32-bit VESA | SL1 - |
| | | local bus slots | SL3 |
|-------------------+----------+------------------+----------|
| SMI connector | JG6 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------------+---------+----------|
| » | Turbo switch enabled | CN4 | Closed |
|---+-----------------------------------+---------+----------|
| | Turbo switch disabled | CN4 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JC12 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JC15 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | JG16 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | X2 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 256K x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 2MB | NONE | NONE | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 2MB | NONE | (1) 512K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 4MB | NONE | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 4MB | (4) 1M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 4MB | NONE | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 5MB | (4) 256K x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 8MB | (4) 1M x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 8MB | NONE | (1) 2M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 8MB | NONE | NONE | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (4) 4M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 16MB | NONE | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 16MB | NONE | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 17MB | (4) 256K x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 20MB | (4) 4M x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 20MB | (4) 1M x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 20MB | NONE | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | NONE | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | NONE | (1) 8M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 32MB | NONE | NONE | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (4) 4M x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 64MB | NONE | (1) 16M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 64MB | NONE | NONE | (1) 16M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (4) 16M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 128MB | NONE | (1) 16M x 36 | (1) 16M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|--------+--------------+--------------+---------------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|--------+--------------+--------------+---------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|--------+--------------+--------------+---------------------|
| 256KB | (4) 64K x 8 | NONE | (1) 32K x 8 |
|--------+--------------+--------------+---------------------|
| 512KB | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|--------+--------------+--------------+---------------------|
| 512KB | (4) 128K x 8 | NONE | (1) 64K x 8 |
|--------+--------------+--------------+---------------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 64K or 128K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 | JS3 | JS4 |
|-------+-------------+------------+------------+------------|
| 128KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 256KB | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 2 & 4 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 256KB | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 1 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 512KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 3 & 5 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 512KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 1 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 1MB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 4 & 6 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JC1 | JC2 | JC3 | JC4 | JC5 | JC6 | JC20 |
|-----------+-----+----------+-----+-----+-----+------+------|
| CX486SX |Open | 2 & 3 |1 & 2|1 & 2|2 & 3| Open | Open |
|-----------+-----+----------+-----+-----+-----+------+------|
| 80486SX |Open | 2 & 3 |1 & 2|1 & 2|Open |Closed|Closed|
|-----------+-----+----------+-----+-----+-----+------+------|
| 80487SX |1 & 2|1 & 2, 3 &|1 & 2|1 & 2|Open |Closed| Open |
| | | 4 | | | | | |
|-----------+-----+----------+-----+-----+-----+------+------|
| CX486DX |2 & 3|1 & 2, 3 &|1 & 2|1 & 2|2 & 3|Closed| Open |
| | | 4 | | | | | |
|-----------+-----+----------+-----+-----+-----+------+------|
| AMD486DX |2 & 3|1 & 2, 3 &|1 & 2|1 & 2|Open |Closed| Open |
| | | 4 | | | | | |
|-----------+-----+----------+-----+-----+-----+------+------|
|80486DX/DX2|2 & 3|1 & 2, 3 &|1 & 2|1 & 2|Open |Closed|Closed|
| | | 4 | | | | | |
|-----------+-----+----------+-----+-----+-----+------+------|
| 80486DX4 |2 & 3|1 & 2, 3 &|1 & 2|1 & 2|Open |Closed|Closed|
| | | 4 | | | | | |
|-----------+-----+----------+-----+-----+-----+------+------|
| P4S/P24S |2 & 3|1 & 2, 3 &|1 & 2|1 & 2|Open |Closed|Closed|
| | | 4 | | | | | |
|-----------+-----+----------+-----+-----+-----+------+------|
| P23S |Open | 2 & 3 |1 & 2|1 & 2|Open |Closed| Open |
|-----------+-----+----------+-----+-----+-----+------+------|
| P24T |1 & 2|1 & 2, 3 &|2 & 3|2 & 3|1 & 2|Closed|Closed|
| | | 4 | | | | | |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JC22 | JG2 | JG3 | JG4 | JG5 | JG19 |JG20 |
|-----------+-------+------+------+------+------+------+-----|
| CX486SX |Closed |1 & 2 |1 & 2 |1 & 2 |1 & 2 |Closed|1 & 2|
|-----------+-------+------+------+------+------+------+-----|
| 80486SX | Open |1 & 2 |1 & 2 |1 & 2 |1 & 2 | Open |Open |
|-----------+-------+------+------+------+------+------+-----|
| 80487SX | Open |1 & 2 |1 & 2 |1 & 2 |1 & 2 | Open |2 & 3|
|-----------+-------+------+------+------+------+------+-----|
| CX486DX |Closed |1 & 2 |1 & 2 |1 & 2 |1 & 2 |Closed|1 & 2|
|-----------+-------+------+------+------+------+------+-----|
| AMD486DX | Open |2 & 3 |2 & 3 |2 & 3 |2 & 3 | Open |Open |
|-----------+-------+------+------+------+------+------+-----|
|80486DX/DX2| Open |1 & 2 |1 & 2 |1 & 2 |1 & 2 | Open |Open |
|-----------+-------+------+------+------+------+------+-----|
| 80486DX4 | Open |2 & 3 |2 & 3 |2 & 3 | Open | Open |2 & 3|
|-----------+-------+------+------+------+------+------+-----|
| P4S/P24S | Open |2 & 3 |2 & 3 |2 & 3 |2 & 3 | Open |2 & 3|
|-----------+-------+------+------+------+------+------+-----|
| P23S | Open |2 & 3 |2 & 3 |2 & 3 |2 & 3 | Open |2 & 3|
|-----------+-------+------+------+------+------+------+-----|
| P24T | Open |2 & 3 |2 & 3 |2 & 3 |2 & 3 | Open |Open |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JC7 | JC8 | JC9 |
|-----------------+--------------+-------------+-------------|
| CX486SX | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|-----------------+--------------+-------------+-------------|
| CX486DX | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|-----------------+--------------+-------------+-------------|
| 80486DX/DX2/DX4 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-----------------+--------------+-------------+-------------|
| Pentium | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| Overdrive | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JF1 | JF2 | JF3 | JG13 |
|--------+------------+------------+------------+------------|
| 20MHz | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|--------+------------+------------+------------+------------|
| 25MHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | Open |
| | closed | closed | closed | |
|--------+------------+------------+------------+------------|
| 33MHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | Open |
| | closed | closed | closed | |
|--------+------------+------------+------------+------------|
| 40MHz | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|--------+------------+------------+------------+------------|
| 50iMHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | Open |
| | closed | closed | closed | |
|--------+------------+------------+------------+------------|
| 50MHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | Open |
| | closed | closed | closed | |
|--------+------------+------------+------------+------------|
| 66iMHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | Open |
| | closed | closed | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Speed | JG14 | JG15 | JC10 | JC11 | JC13 |
|----------+----------+----------+---------+--------+--------|
| 20MHz | Open | Open | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 25MHz | 1 & 2 | Open | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 33MHz | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 40MHz | Open | Open | 2 & 3 | 2 & 3 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 50iMHz | 1 & 2 | Open | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 50MHz | 1 & 2 | Open | 2 & 3 | 2 & 3 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 66iMHz | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION (DX4) |
|------------------------------------------------------------|
| Speed | JX3 | JX4 |
|-------------------+--------------------+-------------------|
| 2x | pins 2 & 3 closed | Open |
|-------------------+--------------------+-------------------|
| 2.5x | Open | Closed |
|-------------------+--------------------+-------------------|
| 3x | pins 1 & 2 closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JX1 | JX2 |
|------------+--------------------+--------------------------|
| 3.3v | pins 2 & 3 closed | Open |
|------------+--------------------+--------------------------|
| 3.45v | pins 1 & 2 closed | Open |
|------------+--------------------+--------------------------|
| 5v | Open | pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | J1 |
|-------------------------------+----------------------------|
| <=33MHz | Open |
|-------------------------------+----------------------------|
| >33MHz | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | J2 |
|-------------------------------+----------------------------|
| 0 wait states | Open |
|-------------------------------+----------------------------|
| 1 wait state | Closed |
+------------------------------------------------------------+