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# UNIDENTIFIED
PM486PU-S3 PCI
Processor CX486SX/UMC486SX/80486SX/CX486DX/AM486DX/80486DX/CX486DX2/
AM486DX2/80486DX2/CX486DX4/AM486DX4/AM486DX4(WB)/80486DX4/
P24D/Pentium Overdrive/CXM1
Processor 20/25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed 100(internal)MHz
Chip Set UMC
Max. 64MB
Onboard
DRAM
Cache 128/256/512KB
BIOS Unidentified
Dimensions 254mm x 218mm
I/O 32-bit PCI slots (3), green PC connector, floppy drive interface,
Options IDE interfaces (2), parallel port, serial ports (2)
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | CN1 | Green PC | JP1 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN2 | Turbo switch | JP2 |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN3 | Turbo LED | JP3 |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | Reset switch | JP4 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN5 | Speaker | JP5 |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN6 | Power LED & | JP6 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN7 | 32-bit PCI slots | PC1 - |
| | | | PC3 |
|-------------------+----------+------------------+----------|
| IDE interface LED | J1 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------------+---------+----------|
| » | Factory configured - do not alter | J20 | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (1) 256K x 36 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (1) 256K x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 2MB | (1) 512K x 36 | NONE |
|------------------+--------------------+--------------------|
| 3MB | (1) 256K x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 4MB | (1) 512K x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 4MB | (1) 1M x 36 | NONE |
|------------------+--------------------+--------------------|
| 5MB | (1) 256K x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 6MB | (1) 512K x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 8MB | (1) 2M x 36 | NONE |
|------------------+--------------------+--------------------|
| 10MB | (1) 512K x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (1) 8M x 36 | NONE |
|------------------+--------------------+--------------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|---------------+--------------------+-----------------------|
| 128KB | (4) 32K x 8 | (1) 8K or (1) 32K x 8 |
|---------------+--------------------+-----------------------|
| 256KB | (4) 64K x 8 | (1) 32K x 8 |
|---------------+--------------------+-----------------------|
| 512KB | (4) 128K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J8 |
|----------------------------+-------------------------------|
| 128KB | Open |
|----------------------------+-------------------------------|
| 256KB | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 512KB | pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J2 | J3 | J5 | J6 | J7 |
|--------------+-------+-------+-------+----------+----------|
| CX486SX | 2 & 3 | 1 & 2 | Open | 1 & 2, 3 | 3 & 4 |
| | | | | & 4 | |
|--------------+-------+-------+-------+----------+----------|
| UMC486SX | 1 & 2 | 2 & 3 | Open | Open | 1 & 2 |
|--------------+-------+-------+-------+----------+----------|
| 80486SX | 1 & 2 | 1 & 2 | Open | 2 & 3, 4 | 3 & 4 |
| | | | | & 5 | |
|--------------+-------+-------+-------+----------+----------|
| CX486DX | 2 & 3 | 1 & 2 | Open | 1 & 2, 3 | 3 & 4 |
| | | | | & 4 | |
|--------------+-------+-------+-------+----------+----------|
| AM486DX | 1 & 2 | 2 & 3 | Open | Open | 1 & 2 |
|--------------+-------+-------+-------+----------+----------|
| 80486DX | 1 & 2 | 1 & 2 | Open | 2 & 3, 4 | 3 & 4 |
| | | | | & 5 | |
|--------------+-------+-------+-------+----------+----------|
| CX486DX2 | 2 & 3 | 1 & 2 | Open | 1 & 2, 3 | 3 & 4 |
| | | | | & 4 | |
|--------------+-------+-------+-------+----------+----------|
| AM486DX2 | 1 & 2 | 2 & 3 | 2 & 3 | Open | 1 & 2 |
|--------------+-------+-------+-------+----------+----------|
| 80486DX2 | 1 & 2 | 1 & 2 | Open | 2 & 3, 4 | 3 & 4 |
| | | | | & 5 | |
|--------------+-------+-------+-------+----------+----------|
| CX486DX4 | 2 & 3 | 1 & 2 | Open | 1 & 2, 3 | 3 & 4 |
| | | | | & 4 | |
|--------------+-------+-------+-------+----------+----------|
| AM486DX4 | 1 & 2 | 2 & 3 | Open | Open | 1 & 2 |
|--------------+-------+-------+-------+----------+----------|
| AM486DX4 | 1 & 2 | 2 & 3 | 2 & 3 | Open | 1 & 2 |
| (WB) | | | | | |
|--------------+-------+-------+-------+----------+----------|
| 80486DX4 | 1 & 2 | 1 & 2 | Open | 2 & 3, 4 | 3 & 4 |
| | | | | & 5 | |
|--------------+-------+-------+-------+----------+----------|
| P24D | 1 & 2 | 1 & 2 | Open | 2 & 3, 4 | 3 & 4 |
| | | | | & 5 | |
|--------------+-------+-------+-------+----------+----------|
| P24T | 1 & 2 | 1 & 2 | Open | 2 & 3, 4 | 3 & 4, 5 |
| | | | | & 5 | & 6 |
|--------------+-------+-------+-------+----------+----------|
| CXM1 | 1 & 2 | 1 & 2 | Open | 2 & 3, 4 | 3 & 4 |
| | | | | & 5 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | J9 | J10 | J12 | J13 | J14 |
|--------------+----------+-------+--------+--------+--------|
| CX486SX | Open | 2 & 3 | Open | Open | Open |
|--------------+----------+-------+--------+--------+--------|
| UMC486SX | 1 & 2, 3 | 3 & 4 | Open | Open | Open |
| | & 4 | | | | |
|--------------+----------+-------+--------+--------+--------|
| 80486SX | Open | Open | Open | Open | Open |
|--------------+----------+-------+--------+--------+--------|
| CX486DX | 3 & 4 | 2 & 3 | Open | Open | Open |
|--------------+----------+-------+--------+--------+--------|
| AM486DX | 1 & 2, 3 | 3 & 4 | Open | Open | Open |
| | & 4 | | | | |
|--------------+----------+-------+--------+--------+--------|
| 80486DX | 3 & 4 | Open | Open | Open | Open |
|--------------+----------+-------+--------+--------+--------|
| CX486DX2 | 3 & 4 | 2 & 3 | Open | Open | Open |
|--------------+----------+-------+--------+--------+--------|
| AM486DX2 | 1 & 2, 3 | 3 & 4 | Open | Open | Open |
| | & 4 | | | | |
|--------------+----------+-------+--------+--------+--------|
| 80486DX2 | 3 & 4 | Open | Open | Open | Open |
|--------------+----------+-------+--------+--------+--------|
| CX486DX4 | 3 & 4 | 2 & 3 | Open | Open | Open |
|--------------+----------+-------+--------+--------+--------|
| AM486DX4 | 1 & 2, 3 | 3 & 4 | Open | Open | Open |
| | & 4 | | | | |
|--------------+----------+-------+--------+--------+--------|
| AM486DX4 | 1 & 2, 3 | 3 & 4 | Open | Open | Open |
| (WB) | & 4 | | | | |
|--------------+----------+-------+--------+--------+--------|
| 80486DX4 | 3 & 4 | Open | Open | Open | Open |
|--------------+----------+-------+--------+--------+--------|
| P24D | 3 & 4 | Open | Closed | Closed | Closed |
|--------------+----------+-------+--------+--------+--------|
| P24T | 2 & 3 | 1 & 2 | Open | Open | Open |
|--------------+----------+-------+--------+--------+--------|
| CXM1 | 3 & 4 | Open | Closed | Closed | Closed |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | J15 | J16 | J17 | J18 | J19 | J21 |
|------------+------+-------+-------+-------+-------+--------|
| CX486SX | Open | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
|------------+------+-------+-------+-------+-------+--------|
| UMC486SX | Open | Open | Open | 2 & 3 | Open | 2 & 3 |
|------------+------+-------+-------+-------+-------+--------|
| 80486SX | Open | 1 & 2 | Open | 1 & 2 | Open | 2 & 3 |
|------------+------+-------+-------+-------+-------+--------|
| CX486DX | Open | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| AM486DX | Open | Open | Open | 2 & 3 | Open | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| 80486DX | Open | 1 & 2 | Open | 1 & 2 | Open | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| CX486DX2 | Open | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| AM486DX2 | Open | Open | Open | 2 & 3 | Open | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| 80486DX2 | Open | 1 & 2 | Open | 1 & 2 | Open | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| CX486DX4 | Open | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| AM486DX4 | Open | Open | Open | 2 & 3 | Open | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| AM486DX4 | Open | Open | Open | 2 & 3 | Open | 1 & 2, |
| (WB) | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| 80486DX4 | Open | 1 & 2 | Open | 1 & 2 | Open | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| P24D | Open | 1 & 2 | Open | 1 & 2 | Open | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| P24T | Open | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2, |
| | | | | | | 3 & 4 |
|------------+------+-------+-------+-------+-------+--------|
| CXM1 | Open | 1 & 2 | Open | 1 & 2 | Open | 1 & 2, |
| | | | | | | 3 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J24 pins 1 & 2 | J24 pins 3 & 4 | J24 pins 5 & 6 |
|---------+----------------+----------------+----------------|
| 20MHz | Open | Open | Open |
|---------+----------------+----------------+----------------|
| 25MHz | Open | Open | Closed |
|---------+----------------+----------------+----------------|
| 33MHz | Closed | Closed | Closed |
|---------+----------------+----------------+----------------|
| 40MHz | Open | Closed | Closed |
|---------+----------------+----------------+----------------|
| 50iMHz | Open | Open | Closed |
|---------+----------------+----------------+----------------|
| 50MHz | Closed | Open | Open |
|---------+----------------+----------------+----------------|
| 66iMHz | Closed | Closed | Closed |
|---------+----------------+----------------+----------------|
| 75iMHz | Open | Open | Closed |
|---------+----------------+----------------+----------------|
| 80iMHz | Open | Closed | Closed |
|---------+----------------+----------------+----------------|
| 100iMHz | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | J11 |
|----------------------------+-------------------------------|
| 3.3v | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 3.45v | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 4v | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 5v | pins 1 & 2 closed |
+------------------------------------------------------------+