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# COMPUTREND SYSTEMS, INC.
PCI486 AL2
Processor UMC486SX/80486SX/SL80486SX/UMC486DX/AM486DX/80486DX/
SL80486DX/CX486DX2/AM486DX2/80486DX2/SL80486DX2/AM486DX4/ 80486DX4/P24D/P24T
Processor 25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)MHz
Speed
Chip Set ALI
Max. 64MB
Onboard
DRAM
Cache 128/256/512KB
BIOS AMI
Dimensions 270mm x 220mm
I/O 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE
Options interfaces (2), parallel port, serial ports (2)
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+-----------+-----------------+------------|
| Serial port 1 | CN1 | Turbo LED | JFP pins |
| | | | 12 & 13 |
|-----------------+-----------+-----------------+------------|
| Serial port 2 | CN2 | Turbo switch | JFP pins |
| | | | 15 - 17 |
|-----------------+-----------+-----------------+------------|
| Parallel port | CN3 | Reset switch | JFP pins |
| | | | 19 & 20 |
|-----------------+-----------+-----------------+------------|
| Floppy drive | CN4 | IDE interface | JFPA |
| interface | | LED | |
|-----------------+-----------+-----------------+------------|
| IDE interface 2 | CN5 | Chassis fan | JFAN |
| | | power | |
|-----------------+-----------+-----------------+------------|
| IDE interface 1 | CN6 | Green PC | JG1 |
| | | connector | |
| | | (monitor) | |
|-----------------+-----------+-----------------+------------|
| External | JB1 | Green PC LED | JG2 |
| battery | | | |
|-----------------+-----------+-----------------+------------|
| Power LED & | JFP pins | Green PC | JG3 |
| keylock | 1 - 5 | connector | |
|-----------------+-----------+-----------------+------------|
| Speaker | JFP pins | 32-bit PCI | PC1 - PC3 |
| | 7 - 10 | slots | |
|------------------------------------------------------------|
| Note: The location of JFAN is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------+--------+----------------|
| » | Battery type select internal | JB1 | Pins 2 & 3 |
| | | | closed |
|---+------------------------------+--------+----------------|
| | Battery type select external | JB1 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-----------+--------------+-------------+-------------------|
| 128KB | (4) 32K x 8 | None | (1) 8K/16K/32 x 8 |
|-----------+--------------+-------------+-------------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 16K/32K x 8 |
|-----------+--------------+-------------+-------------------|
| 256KB (B) | (4) 64K x 8 | None | (1) 16K/32K x 8 |
|-----------+--------------+-------------+-------------------|
| 512KB | (4) 128K x 8 | None | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 | JS3 |
|-----------+----------------+---------------+---------------|
| 128KB | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (A) | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (B) | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 512KB | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JC1 | JC2 | JC3 | JC4 |
|---------------+-------+--------------+-------------+-------|
| UMC486SX | 2 & 3 | 2 & 3 | Open | 1 & 2 |
|---------------+-------+--------------+-------------+-------|
| 80486SX | Open | 2 & 3 | Open | Open |
|---------------+-------+--------------+-------------+-------|
| SL80486SX | Open | 2 & 3 | Open | 2 & 3 |
|---------------+-------+--------------+-------------+-------|
| UMC486DX | 2 & 3 | 1 & 2, 3 & 4 | Open | 1 & 2 |
|---------------+-------+--------------+-------------+-------|
| AM486DX | 2 & 3 | 1 & 2, 3 & 4 | Open | Open |
|---------------+-------+--------------+-------------+-------|
| 80486DX | 2 & 3 | 1 & 2, 3 & 4 | Open | Open |
|---------------+-------+--------------+-------------+-------|
| SL80486DX | 2 & 3 | 1 & 2, 3 & 4 | Open | 2 & 3 |
|---------------+-------+--------------+-------------+-------|
| CX486DX2 | 2 & 3 | 1 & 2, 3 & 4 | 4 & 5 | 4 & 5 |
|---------------+-------+--------------+-------------+-------|
| AM486DX2 | 2 & 3 | 1 & 2, 3 & 4 | 1 & 2 5 & 6 | 2 & 3 |
| (V8B) | | | | |
|---------------+-------+--------------+-------------+-------|
| AM486DX2 | 2 & 3 | 1 & 2, 3 & 4 | Open | Open |
| (V8T) | | | | |
|---------------+-------+--------------+-------------+-------|
| AM486DX2 | 2 & 3 | 1 & 2, 3 & 4 | Open | Open |
|---------------+-------+--------------+-------------+-------|
| 80486DX2 | 2 & 3 | 1 & 2, 3 & 4 | Open | Open |
|---------------+-------+--------------+-------------+-------|
| SL80486DX2 | 2 & 3 | 1 & 2, 3 & 4 | Open | 2 & 3 |
|---------------+-------+--------------+-------------+-------|
| SL80486DX2 | 1 & 2 | 1 & 2, 3 & 4 | Open | 2 & 3 |
| (OD) | | | | |
|---------------+-------+--------------+-------------+-------|
| AM486DX4 | 2 & 3 | 1 & 2, 3 & 4 | 1 & 2 5 & 6 | 2 & 3 |
| (V8B) | | | | |
|---------------+-------+--------------+-------------+-------|
| AM486DX4 | 2 & 3 | 1 & 2, 3 & 4 | Open | Open |
| (V8T) | | | | |
|---------------+-------+--------------+-------------+-------|
| 80486DX4 | 2 & 3 | 1 & 2, 3 & 4 | Open | 2 & 3 |
|---------------+-------+--------------+-------------+-------|
| P24D | 2 & 3 | 1 & 2, 3 & 4 | 1 & 2 | 2 & 3 |
|---------------+-------+--------------+-------------+-------|
| P24T | 2 & 3 | 1 & 2, 3 & 4 | 1 & 2 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JC5 | JC6 | JC7 | JC8 | JC9 |
|-----------------+-------+-------+----------+--------+------|
| UMC486SX | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Open |
|-----------------+-------+-------+----------+--------+------|
| 80486SX | 1 & 2 | Open | 1 & 2 | Open | Open |
|-----------------+-------+-------+----------+--------+------|
| SL80486SX | 2 & 3 | 2 & 3 | 1 & 2 | Closed | Open |
|-----------------+-------+-------+----------+--------+------|
| UMC486DX | 1 & 2 | 1 & 2 | 1 & 2 | Closed | Open |
|-----------------+-------+-------+----------+--------+------|
| AM486DX | 1 & 2 | Open | 1 & 2 | Open | Open |
|-----------------+-------+-------+----------+--------+------|
| 80486DX | 1 & 2 | Open | 1 & 2 | Open | Open |
|-----------------+-------+-------+----------+--------+------|
| SL80486DX | 2 & 3 | 2 & 3 | 1 & 2 | Closed | Open |
|-----------------+-------+-------+----------+--------+------|
| CX486DX2 | 4 & 5 | 4 & 5 | 1 & 2 | Closed | Open |
|-----------------+-------+-------+----------+--------+------|
| AM486DX2 (V8B) | 2 & 3 | 2 & 3 | 2 & 3, 4 | Closed | Open |
| | | | & 5 | | |
|-----------------+-------+-------+----------+--------+------|
| AM486DX2 (V8T) | 1 & 2 | Open | 1 & 2 | Open | Open |
|-----------------+-------+-------+----------+--------+------|
| AM486DX2 | 1 & 2 | Open | 1 & 2 | Open | Open |
|-----------------+-------+-------+----------+--------+------|
| 80486DX2 | 1 & 2 | Open | 1 & 2 | Open | Open |
|-----------------+-------+-------+----------+--------+------|
| SL80486DX2 | 2 & 3 | 2 & 3 | 1 & 2 | Closed | Open |
|-----------------+-------+-------+----------+--------+------|
| SL80486DX2 (OD) | 2 & 3 | 2 & 3 | 1 & 2 | Closed | Open |
|-----------------+-------+-------+----------+--------+------|
| AM486DX4 (V8B) | 2 & 3 | 2 & 3 | 2 & 3, 4 | Closed | Open |
| | | | & 5 | | |
|-----------------+-------+-------+----------+--------+------|
| AM486DX4 (V8T) | 1 & 2 | Open | 1 & 2 | Open | Open |
|-----------------+-------+-------+----------+--------+------|
| 80486DX4 | 2 & 3 | 2 & 3 | 1 & 2 | Closed | Open |
|-----------------+-------+-------+----------+--------+------|
| P24D | 2 & 3 | 2 & 3 | 2 & 3, 4 | Closed | Open |
| | | | & 5 | | |
|-----------------+-------+-------+----------+--------+------|
| P24T | 2 & 3 | 2 & 3 | 2 & 3, 4 | Closed | Open |
| | | | & 5 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JK1 | JK2 | JK3 |
|---------+---------------------+-------------------+--------|
| 25MHz | Open | Pins 2 & 3 closed | Open |
|---------+---------------------+-------------------+--------|
| 33MHz | Pins 1 & 2, 3 & 4 | Pins 2 & 3 closed | Open |
| | closed | | |
|---------+---------------------+-------------------+--------|
| 40MHz | Pins 1 & 2 closed | Pins 1 & 2 closed | Closed |
|---------+---------------------+-------------------+--------|
| 50iMHz | Open | Pins 2 & 3 closed | Open |
|---------+---------------------+-------------------+--------|
| 66iMHz | Pins 1 & 2, 3 & 4 | Pins 2 & 3 closed | Open |
| | closed | | |
|---------+---------------------+-------------------+--------|
| 75iMHz | Open | Pins 2 & 3 closed | Open |
|---------+---------------------+-------------------+--------|
| 80iMHz | Pins 1 & 2 closed | Pins 1 & 2 closed | Closed |
|---------+---------------------+-------------------+--------|
| 100iMHz | Pins 1 & 2, 3 & 4 | Pins 2 & 3 closed | Open |
| | closed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | J4 | JP8 |
|-------------+------------------------------------+---------|
| | 3.45v | Pins 4 & 10, 5 & 11, 6 & 12 closed | Open |
|---+---------+------------------------------------+---------|
| | 4v | Pins 4 & 10, 5 & 11, 6 & 12 closed | Closed |
|---+---------+------------------------------------+---------|
| » | 5v | Pins 1 & 7, 2 & 8, 3 & 9 closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CONFIGURATION |
|------------------------------------------------------------|
| DMA | JP17 | JP18 | JP23 | JP24 |
|-----------+------------+-----------+-----------+-----------|
| DMA 1 | Closed | Closed | Open | Open |
|-----------+------------+-----------+-----------+-----------|
| DMA 3 | Open | Open | Closed | Closed |
+------------------------------------------------------------+